llama : move end-user examples to tools directory (#13249)

* llama : move end-user examples to tools directory

---------

Co-authored-by: Xuan Son Nguyen <son@huggingface.co>

tools/server/CMakeLists.txt

@@ -0,0 +1,50 @@
+set(TARGET llama-server)
+
+option(LLAMA_SERVER_SSL "Build SSL support for the server" OFF)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
+
+if (MINGW)
+    # fix: https://github.com/ggml-org/llama.cpp/actions/runs/9651004652/job/26617901362?pr=8006
+    add_compile_definitions(_WIN32_WINNT=${GGML_WIN_VER})
+endif()
+
+set(TARGET_SRCS
+    server.cpp
+    utils.hpp
+    httplib.h
+)
+set(PUBLIC_ASSETS
+    index.html.gz
+    loading.html
+)
+
+foreach(asset ${PUBLIC_ASSETS})
+    set(input "${CMAKE_CURRENT_SOURCE_DIR}/public/${asset}")
+    set(output "${CMAKE_CURRENT_BINARY_DIR}/${asset}.hpp")
+    list(APPEND TARGET_SRCS ${output})
+    add_custom_command(
+        DEPENDS "${input}"
+        OUTPUT "${output}"
+        COMMAND "${CMAKE_COMMAND}" "-DINPUT=${input}" "-DOUTPUT=${output}" -P "${PROJECT_SOURCE_DIR}/scripts/xxd.cmake"
+    )
+    set_source_files_properties(${output} PROPERTIES GENERATED TRUE)
+endforeach()
+
+add_executable(${TARGET} ${TARGET_SRCS})
+install(TARGETS ${TARGET} RUNTIME)
+
+target_include_directories(${TARGET} PRIVATE ${CMAKE_SOURCE_DIR})
+target_link_libraries(${TARGET} PRIVATE common ${CMAKE_THREAD_LIBS_INIT})
+
+if (LLAMA_SERVER_SSL)
+    find_package(OpenSSL REQUIRED)
+    target_link_libraries(${TARGET} PRIVATE OpenSSL::SSL OpenSSL::Crypto)
+    target_compile_definitions(${TARGET} PRIVATE CPPHTTPLIB_OPENSSL_SUPPORT)
+endif()
+
+if (WIN32)
+    TARGET_LINK_LIBRARIES(${TARGET} PRIVATE ws2_32)
+endif()
+
+target_compile_features(${TARGET} PRIVATE cxx_std_17)

tools/server/bench/README.md

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+### Server benchmark tools
+
+Benchmark is using [k6](https://k6.io/).
+
+##### Install k6 and sse extension
+
+SSE is not supported by default in k6, you have to build k6 with the [xk6-sse](https://github.com/phymbert/xk6-sse) extension.
+
+Example (assuming golang >= 1.21 is installed):
+```shell
+go install go.k6.io/xk6/cmd/xk6@latest
+$GOPATH/bin/xk6 build master \
+--with github.com/phymbert/xk6-sse
+```
+
+#### Download a dataset
+
+This dataset was originally proposed in [vLLM benchmarks](https://github.com/vllm-project/vllm/blob/main/benchmarks/README.md).
+
+```shell
+wget https://huggingface.co/datasets/anon8231489123/ShareGPT_Vicuna_unfiltered/resolve/main/ShareGPT_V3_unfiltered_cleaned_split.json
+```
+
+#### Download a model
+Example for PHI-2
+
+```shell
+../../../scripts/hf.sh --repo ggml-org/models --file phi-2/ggml-model-q4_0.gguf
+```
+
+#### Start the server
+The server must answer OAI Chat completion requests on `http://localhost:8080/v1` or according to the environment variable `SERVER_BENCH_URL`.
+
+Example:
+```shell
+llama-server --host localhost --port 8080 \
+  --model ggml-model-q4_0.gguf \
+  --cont-batching \
+  --metrics \
+  --parallel 8 \
+  --batch-size 512 \
+  --ctx-size 4096 \
+  -ngl 33
+```
+
+#### Run the benchmark
+
+For 500 chat completions request with 8 concurrent users during maximum 10 minutes, run:
+```shell
+./k6 run script.js --duration 10m --iterations 500 --vus 8
+```
+
+The benchmark values can be overridden with:
+- `SERVER_BENCH_URL` server url prefix for chat completions, default `http://localhost:8080/v1`
+- `SERVER_BENCH_N_PROMPTS` total prompts to randomly select in the benchmark, default `480`
+- `SERVER_BENCH_MODEL_ALIAS` model alias to pass in the completion request, default `my-model`
+- `SERVER_BENCH_MAX_TOKENS` max tokens to predict, default: `512`
+- `SERVER_BENCH_DATASET` path to the benchmark dataset file
+- `SERVER_BENCH_MAX_PROMPT_TOKENS` maximum prompt tokens to filter out in the dataset: default `1024`
+- `SERVER_BENCH_MAX_CONTEXT` maximum context size of the completions request to filter out in the dataset: prompt + predicted tokens, default `2048`
+
+Note: the local tokenizer is just a string space split, real number of tokens will differ.
+
+Or with [k6 options](https://k6.io/docs/using-k6/k6-options/reference/):
+
+```shell
+SERVER_BENCH_N_PROMPTS=500 k6 run script.js --duration 10m --iterations 500 --vus 8
+```
+
+To [debug http request](https://k6.io/docs/using-k6/http-debugging/) use `--http-debug="full"`.
+
+#### Metrics
+
+Following metrics are available computed from the OAI chat completions response `usage`:
+- `llamacpp_tokens_second` Trend of `usage.total_tokens / request duration`
+- `llamacpp_prompt_tokens` Trend of `usage.prompt_tokens`
+- `llamacpp_prompt_tokens_total_counter` Counter of `usage.prompt_tokens`
+- `llamacpp_completion_tokens` Trend of `usage.completion_tokens`
+- `llamacpp_completion_tokens_total_counter` Counter of `usage.completion_tokens`
+- `llamacpp_completions_truncated_rate` Rate of completions truncated, i.e. if `finish_reason === 'length'`
+- `llamacpp_completions_stop_rate` Rate of completions stopped by the model, i.e. if `finish_reason === 'stop'`
+
+The script will fail if too many completions are truncated, see `llamacpp_completions_truncated_rate`.
+
+K6 metrics might be compared against [server metrics](../README.md), with:
+
+```shell
+curl http://localhost:8080/metrics
+```
+
+### Using the CI python script
+The `bench.py` script does several steps:
+- start the server
+- define good variable for k6
+- run k6 script
+- extract metrics from prometheus
+
+It aims to be used in the CI, but you can run it manually:
+
+```shell
+LLAMA_SERVER_BIN_PATH=../../../cmake-build-release/bin/llama-server python bench.py \
+              --runner-label local \
+              --name local \
+              --branch `git rev-parse --abbrev-ref HEAD` \
+              --commit `git rev-parse HEAD` \
+              --scenario script.js \
+              --duration 5m \
+              --hf-repo ggml-org/models	 \
+              --hf-file phi-2/ggml-model-q4_0.gguf \
+              --model-path-prefix models \
+              --parallel 4 \
+              -ngl 33 \
+              --batch-size 2048 \
+              --ubatch-size	256 \
+              --ctx-size 4096 \
+              --n-prompts 200 \
+              --max-prompt-tokens 256 \
+              --max-tokens 256
+```

tools/server/bench/bench.py

@@ -0,0 +1,323 @@
+from __future__ import annotations
+
+import argparse
+import json
+import os
+import re
+import signal
+import socket
+import subprocess
+import sys
+import threading
+import time
+import traceback
+from contextlib import closing
+from datetime import datetime
+
+import matplotlib
+import matplotlib.dates
+import matplotlib.pyplot as plt
+import requests
+from statistics import mean
+
+
+def main(args_in: list[str] | None = None) -> None:
+    parser = argparse.ArgumentParser(description="Start server benchmark scenario")
+    parser.add_argument("--name", type=str, help="Bench name", required=True)
+    parser.add_argument("--runner-label", type=str, help="Runner label", required=True)
+    parser.add_argument("--branch", type=str, help="Branch name", default="detached")
+    parser.add_argument("--commit", type=str, help="Commit name", default="dirty")
+    parser.add_argument("--host", type=str, help="Server listen host", default="0.0.0.0")
+    parser.add_argument("--port", type=int, help="Server listen host", default="8080")
+    parser.add_argument("--model-path-prefix", type=str, help="Prefix where to store the model files", default="models")
+    parser.add_argument("--n-prompts", type=int,
+                        help="SERVER_BENCH_N_PROMPTS: total prompts to randomly select in the benchmark", required=True)
+    parser.add_argument("--max-prompt-tokens", type=int,
+                        help="SERVER_BENCH_MAX_PROMPT_TOKENS: maximum prompt tokens to filter out in the dataset",
+                        required=True)
+    parser.add_argument("--max-tokens", type=int,
+                        help="SERVER_BENCH_MAX_CONTEXT: maximum context size of the completions request to filter out in the dataset: prompt + predicted tokens",
+                        required=True)
+    parser.add_argument("--hf-repo", type=str, help="Hugging Face model repository", required=True)
+    parser.add_argument("--hf-file", type=str, help="Hugging Face model file", required=True)
+    parser.add_argument("-ngl", "--n-gpu-layers", type=int, help="layers to the GPU for computation", required=True)
+    parser.add_argument("--ctx-size", type=int, help="Set the size of the prompt context", required=True)
+    parser.add_argument("--parallel", type=int, help="Set the number of slots for process requests", required=True)
+    parser.add_argument("--batch-size", type=int, help="Set the batch size for prompt processing", required=True)
+    parser.add_argument("--ubatch-size", type=int, help="physical maximum batch size", required=True)
+    parser.add_argument("--scenario", type=str, help="Scenario to run", required=True)
+    parser.add_argument("--duration", type=str, help="Bench scenario", required=True)
+
+    args = parser.parse_args(args_in)
+
+    start_time = time.time()
+
+    # Start the server and performance scenario
+    try:
+        server_process = start_server(args)
+    except Exception:
+        print("bench: server start error :")
+        traceback.print_exc(file=sys.stdout)
+        sys.exit(1)
+
+    # start the benchmark
+    iterations = 0
+    data = {}
+    try:
+        start_benchmark(args)
+
+        with open("results.github.env", 'w') as github_env:
+            # parse output
+            with open('k6-results.json', 'r') as bench_results:
+                # Load JSON data from file
+                data = json.load(bench_results)
+                for metric_name in data['metrics']:
+                    for metric_metric in data['metrics'][metric_name]:
+                        value = data['metrics'][metric_name][metric_metric]
+                        if isinstance(value, float) or isinstance(value, int):
+                            value = round(value, 2)
+                            data['metrics'][metric_name][metric_metric]=value
+                            github_env.write(
+                                f"{escape_metric_name(metric_name)}_{escape_metric_name(metric_metric)}={value}\n")
+                iterations = data['root_group']['checks']['success completion']['passes']
+
+    except Exception:
+        print("bench: error :")
+        traceback.print_exc(file=sys.stdout)
+
+    # Stop the server
+    if server_process:
+        try:
+            print(f"bench: shutting down server pid={server_process.pid} ...")
+            if os.name == 'nt':
+                interrupt = signal.CTRL_C_EVENT
+            else:
+                interrupt = signal.SIGINT
+            server_process.send_signal(interrupt)
+            server_process.wait(0.5)
+
+        except subprocess.TimeoutExpired:
+            print(f"server still alive after 500ms, force-killing pid={server_process.pid} ...")
+            server_process.kill()  # SIGKILL
+            server_process.wait()
+
+        while is_server_listening(args.host, args.port):
+            time.sleep(0.1)
+
+    title = (f"llama.cpp {args.name} on {args.runner_label}\n "
+             f"duration={args.duration} {iterations} iterations")
+    xlabel = (f"{args.hf_repo}/{args.hf_file}\n"
+              f"parallel={args.parallel} ctx-size={args.ctx_size} ngl={args.n_gpu_layers} batch-size={args.batch_size} ubatch-size={args.ubatch_size} pp={args.max_prompt_tokens} pp+tg={args.max_tokens}\n"
+              f"branch={args.branch} commit={args.commit}")
+
+    # Prometheus
+    end_time = time.time()
+    prometheus_metrics = {}
+    if is_server_listening("0.0.0.0", 9090):
+        metrics = ['prompt_tokens_seconds', 'predicted_tokens_seconds',
+                   'kv_cache_usage_ratio', 'requests_processing', 'requests_deferred']
+
+        for metric in metrics:
+            resp = requests.get(f"http://localhost:9090/api/v1/query_range",
+                                params={'query': 'llamacpp:' + metric, 'start': start_time, 'end': end_time, 'step': 2})
+
+            with open(f"{metric}.json", 'w') as metric_json:
+                metric_json.write(resp.text)
+
+            if resp.status_code != 200:
+                print(f"bench: unable to extract prometheus metric {metric}: {resp.text}")
+            else:
+                metric_data = resp.json()
+                values = metric_data['data']['result'][0]['values']
+                timestamps, metric_values = zip(*values)
+                metric_values = [float(value) for value in metric_values]
+                prometheus_metrics[metric] = metric_values
+                timestamps_dt = [str(datetime.fromtimestamp(int(ts))) for ts in timestamps]
+                plt.figure(figsize=(16, 10), dpi=80)
+                plt.plot(timestamps_dt, metric_values, label=metric)
+                plt.xticks(rotation=0, fontsize=14, horizontalalignment='center', alpha=.7)
+                plt.yticks(fontsize=12, alpha=.7)
+
+                ylabel = f"llamacpp:{metric}"
+                plt.title(title,
+                          fontsize=14, wrap=True)
+                plt.grid(axis='both', alpha=.3)
+                plt.ylabel(ylabel, fontsize=22)
+                plt.xlabel(xlabel, fontsize=14, wrap=True)
+                plt.gca().xaxis.set_major_locator(matplotlib.dates.MinuteLocator())
+                plt.gca().xaxis.set_major_formatter(matplotlib.dates.DateFormatter("%Y-%m-%d %H:%M:%S"))
+                plt.gcf().autofmt_xdate()
+
+                # Remove borders
+                plt.gca().spines["top"].set_alpha(0.0)
+                plt.gca().spines["bottom"].set_alpha(0.3)
+                plt.gca().spines["right"].set_alpha(0.0)
+                plt.gca().spines["left"].set_alpha(0.3)
+
+                # Save the plot as a jpg image
+                plt.savefig(f'{metric}.jpg', dpi=60)
+                plt.close()
+
+                # Mermaid format in case images upload failed
+                with open(f"{metric}.mermaid", 'w') as mermaid_f:
+                    mermaid = (
+                    f"""---
+config:
+    xyChart:
+        titleFontSize: 12
+        width: 900
+        height: 600
+    themeVariables:
+        xyChart:
+            titleColor: "#000000"
+---
+xychart-beta
+    title "{title}"
+    y-axis "llamacpp:{metric}"
+    x-axis "llamacpp:{metric}" {int(min(timestamps))} --> {int(max(timestamps))}
+    line [{', '.join([str(round(float(value), 2)) for value in metric_values])}]
+                    """)
+                    mermaid_f.write(mermaid)
+
+    # 140 chars max for commit status description
+    bench_results = {
+        "i": iterations,
+        "req": {
+            "p95": round(data['metrics']["http_req_duration"]["p(95)"], 2),
+            "avg": round(data['metrics']["http_req_duration"]["avg"], 2),
+        },
+        "pp": {
+            "p95": round(data['metrics']["llamacpp_prompt_processing_second"]["p(95)"], 2),
+            "avg": round(data['metrics']["llamacpp_prompt_processing_second"]["avg"], 2),
+            "0": round(mean(prometheus_metrics['prompt_tokens_seconds']), 2) if 'prompt_tokens_seconds' in prometheus_metrics else 0,
+        },
+        "tg": {
+            "p95": round(data['metrics']["llamacpp_tokens_second"]["p(95)"], 2),
+            "avg": round(data['metrics']["llamacpp_tokens_second"]["avg"], 2),
+            "0": round(mean(prometheus_metrics['predicted_tokens_seconds']), 2) if 'predicted_tokens_seconds' in prometheus_metrics else 0,
+        },
+    }
+    with open("results.github.env", 'a') as github_env:
+        github_env.write(f"BENCH_RESULTS={json.dumps(bench_results, indent=None, separators=(',', ':') )}\n")
+        github_env.write(f"BENCH_ITERATIONS={iterations}\n")
+
+        title = title.replace('\n', ' ')
+        xlabel = xlabel.replace('\n', ' ')
+        github_env.write(f"BENCH_GRAPH_TITLE={title}\n")
+        github_env.write(f"BENCH_GRAPH_XLABEL={xlabel}\n")
+
+
+def start_benchmark(args):
+    k6_path = './k6'
+    if 'BENCH_K6_BIN_PATH' in os.environ:
+        k6_path = os.environ['BENCH_K6_BIN_PATH']
+    k6_args = [
+        'run', args.scenario,
+        '--no-color',
+        '--no-connection-reuse',
+        '--no-vu-connection-reuse',
+    ]
+    k6_args.extend(['--duration', args.duration])
+    k6_args.extend(['--iterations', args.n_prompts])
+    k6_args.extend(['--vus', args.parallel])
+    k6_args.extend(['--summary-export', 'k6-results.json'])
+    k6_args.extend(['--out', 'csv=k6-results.csv'])
+    args = f"SERVER_BENCH_N_PROMPTS={args.n_prompts} SERVER_BENCH_MAX_PROMPT_TOKENS={args.max_prompt_tokens} SERVER_BENCH_MAX_CONTEXT={args.max_tokens} "
+    args = args + ' '.join([str(arg) for arg in [k6_path, *k6_args]])
+    print(f"bench: starting k6 with: {args}")
+    k6_completed = subprocess.run(args, shell=True, stdout=sys.stdout, stderr=sys.stderr)
+    if k6_completed.returncode != 0:
+        raise Exception("bench: unable to run k6")
+
+
+def start_server(args):
+    server_process = start_server_background(args)
+
+    attempts = 0
+    max_attempts = 600
+    if 'GITHUB_ACTIONS' in os.environ:
+        max_attempts *= 2
+
+    while not is_server_listening(args.host, args.port):
+        attempts += 1
+        if attempts > max_attempts:
+            assert False, "server not started"
+        print(f"bench:     waiting for server to start ...")
+        time.sleep(0.5)
+
+    attempts = 0
+    while not is_server_ready(args.host, args.port):
+        attempts += 1
+        if attempts > max_attempts:
+            assert False, "server not ready"
+        print(f"bench:     waiting for server to be ready ...")
+        time.sleep(0.5)
+
+    print("bench: server started and ready.")
+    return server_process
+
+
+def start_server_background(args):
+    # Start the server
+    server_path = '../../../build/bin/llama-server'
+    if 'LLAMA_SERVER_BIN_PATH' in os.environ:
+        server_path = os.environ['LLAMA_SERVER_BIN_PATH']
+    server_args = [
+        '--host', args.host,
+        '--port', args.port,
+    ]
+    server_args.extend(['--hf-repo', args.hf_repo])
+    server_args.extend(['--hf-file', args.hf_file])
+    server_args.extend(['--n-gpu-layers', args.n_gpu_layers])
+    server_args.extend(['--ctx-size', args.ctx_size])
+    server_args.extend(['--parallel', args.parallel])
+    server_args.extend(['--batch-size', args.batch_size])
+    server_args.extend(['--ubatch-size', args.ubatch_size])
+    server_args.extend(['--n-predict', args.max_tokens * 2])
+    server_args.extend(['--defrag-thold', "0.1"])
+    server_args.append('--cont-batching')
+    server_args.append('--metrics')
+    server_args.append('--flash-attn')
+    args = [str(arg) for arg in [server_path, *server_args]]
+    print(f"bench: starting server with: {' '.join(args)}")
+    pkwargs = {
+        'stdout': subprocess.PIPE,
+        'stderr': subprocess.PIPE
+    }
+    server_process = subprocess.Popen(
+        args,
+        **pkwargs)  # pyright: ignore[reportArgumentType, reportCallIssue]
+
+    def server_log(in_stream, out_stream):
+        for line in iter(in_stream.readline, b''):
+            print(line.decode('utf-8'), end='', file=out_stream)
+
+    thread_stdout = threading.Thread(target=server_log, args=(server_process.stdout, sys.stdout))
+    thread_stdout.start()
+    thread_stderr = threading.Thread(target=server_log, args=(server_process.stderr, sys.stderr))
+    thread_stderr.start()
+
+    return server_process
+
+
+def is_server_listening(server_fqdn, server_port):
+    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
+        result = sock.connect_ex((server_fqdn, server_port))
+        _is_server_listening = result == 0
+        if _is_server_listening:
+            print(f"server is listening on {server_fqdn}:{server_port}...")
+        return _is_server_listening
+
+
+def is_server_ready(server_fqdn, server_port):
+    url = f"http://{server_fqdn}:{server_port}/health"
+    response = requests.get(url)
+    return response.status_code == 200
+
+
+def escape_metric_name(metric_name):
+    return re.sub('[^A-Z0-9]', '_', metric_name.upper())
+
+
+if __name__ == '__main__':
+    main()

tools/server/bench/prometheus.yml

@@ -0,0 +1,9 @@
+global:
+  scrape_interval:     10s
+  external_labels:
+    llamacpp: 'server'
+
+scrape_configs:
+  - job_name: 'llama.cpp server'
+    static_configs:
+      - targets: ['localhost:8080']

tools/server/bench/requirements.txt

@@ -0,0 +1,2 @@
+matplotlib
+requests

tools/server/bench/script.js

@@ -0,0 +1,162 @@
+import sse from 'k6/x/sse'
+import {check, sleep} from 'k6'
+import {SharedArray} from 'k6/data'
+import {Counter, Rate, Trend} from 'k6/metrics'
+import exec from 'k6/execution';
+
+// Server chat completions prefix
+const server_url = __ENV.SERVER_BENCH_URL ? __ENV.SERVER_BENCH_URL : 'http://localhost:8080/v1'
+
+// Number of total prompts in the dataset - default 10m / 10 seconds/request * number of users
+const n_prompt = __ENV.SERVER_BENCH_N_PROMPTS ? parseInt(__ENV.SERVER_BENCH_N_PROMPTS) : 600 / 10 * 8
+
+// Model name to request
+const model = __ENV.SERVER_BENCH_MODEL_ALIAS ? __ENV.SERVER_BENCH_MODEL_ALIAS : 'my-model'
+
+// Dataset path
+const dataset_path = __ENV.SERVER_BENCH_DATASET ? __ENV.SERVER_BENCH_DATASET : './ShareGPT_V3_unfiltered_cleaned_split.json'
+
+// Max tokens to predict
+const max_tokens = __ENV.SERVER_BENCH_MAX_TOKENS ? parseInt(__ENV.SERVER_BENCH_MAX_TOKENS) : 512
+
+// Max prompt tokens
+const n_prompt_tokens = __ENV.SERVER_BENCH_MAX_PROMPT_TOKENS ? parseInt(__ENV.SERVER_BENCH_MAX_PROMPT_TOKENS) : 1024
+
+// Max slot context
+const n_ctx_slot = __ENV.SERVER_BENCH_MAX_CONTEXT ? parseInt(__ENV.SERVER_BENCH_MAX_CONTEXT) : 2048
+
+export function setup() {
+    console.info(`Benchmark config: server_url=${server_url} n_prompt=${n_prompt} model=${model} dataset_path=${dataset_path} max_tokens=${max_tokens}`)
+}
+
+const data = new SharedArray('conversations', function () {
+    const tokenizer = (message) => message.split(/[\s,'".?]/)
+
+    return JSON.parse(open(dataset_path))
+        // Filter out the conversations with less than 2 turns.
+        .filter(data => data["conversations"].length >= 2)
+        .filter(data => data["conversations"][0]["from"] === "human")
+        .map(data => {
+            return {
+                prompt: data["conversations"][0]["value"],
+                n_prompt_tokens: tokenizer(data["conversations"][0]["value"]).length,
+                n_completion_tokens: tokenizer(data["conversations"][1]["value"]).length,
+            }
+        })
+        // Filter out too short sequences
+        .filter(conv => conv.n_prompt_tokens >= 4 && conv.n_completion_tokens >= 4)
+        // Filter out too long sequences.
+        .filter(conv => conv.n_prompt_tokens <= n_prompt_tokens && conv.n_prompt_tokens + conv.n_completion_tokens <= n_ctx_slot)
+        // Keep only first n prompts
+        .slice(0, n_prompt)
+})
+
+const llamacpp_prompt_tokens = new Trend('llamacpp_prompt_tokens')
+const llamacpp_completion_tokens = new Trend('llamacpp_completion_tokens')
+
+const llamacpp_tokens_second = new Trend('llamacpp_tokens_second')
+const llamacpp_prompt_processing_second = new Trend('llamacpp_prompt_processing_second')
+const llamacpp_emit_first_token_second = new Trend('llamacpp_emit_first_token_second')
+
+const llamacpp_prompt_tokens_total_counter = new Counter('llamacpp_prompt_tokens_total_counter')
+const llamacpp_completion_tokens_total_counter = new Counter('llamacpp_completion_tokens_total_counter')
+
+const llamacpp_completions_truncated_rate = new Rate('llamacpp_completions_truncated_rate')
+const llamacpp_completions_stop_rate = new Rate('llamacpp_completions_stop_rate')
+
+export const options = {
+    thresholds: {
+        llamacpp_completions_truncated_rate: [
+            // more than 80% of truncated input will abort the test
+            {threshold: 'rate < 0.8', abortOnFail: true, delayAbortEval: '1m'},
+        ],
+    },
+    duration: '10m',
+    vus: 8,
+}
+
+export default function () {
+    const conversation = data[exec.scenario.iterationInInstance % data.length]
+    const payload = {
+        "messages": [
+            {
+                "role": "system",
+                "content": "You are ChatGPT, an AI assistant.",
+            },
+            {
+                "role": "user",
+                "content": conversation.prompt,
+            }
+        ],
+        "model": model,
+        "stream": true,
+        "stream_options": {
+          "include_usage": true, // False to be supported in llama.cpp server
+        },
+        "seed": 42,
+        "max_tokens": max_tokens,
+        "stop": ["<|im_end|>"] // This is temporary for phi-2 base (i.e. not instructed) since the server expects that the model always to emit BOS
+    }
+
+    const params = {method: 'POST', body: JSON.stringify(payload)};
+
+    const startTime = new Date()
+    let promptEvalEndTime = null
+    let prompt_tokens = 0
+    let completions_tokens = 0
+    let finish_reason = null
+    const res = sse.open(`${server_url}/chat/completions`, params, function (client) {
+        client.on('event', function (event) {
+            if (promptEvalEndTime == null) {
+                promptEvalEndTime = new Date()
+                llamacpp_emit_first_token_second.add((promptEvalEndTime - startTime) / 1.e3)
+            }
+
+            if (event.data === '[DONE]' || event.data === '') {
+                return
+            }
+
+            let chunk = JSON.parse(event.data)
+
+            if (chunk.choices && chunk.choices.length > 0) {
+                let choice = chunk.choices[0]
+                if (choice.finish_reason) {
+                    finish_reason = choice.finish_reason
+                }
+            }
+
+            if (chunk.usage) {
+                prompt_tokens = chunk.usage.prompt_tokens
+                llamacpp_prompt_tokens.add(prompt_tokens)
+                llamacpp_prompt_tokens_total_counter.add(prompt_tokens)
+
+                completions_tokens = chunk.usage.completion_tokens
+                llamacpp_completion_tokens.add(completions_tokens)
+                llamacpp_completion_tokens_total_counter.add(completions_tokens)
+            }
+        })
+
+        client.on('error', function (e) {
+            console.log('An unexpected error occurred: ', e.error());
+            throw e;
+        })
+    })
+
+    check(res, {'success completion': (r) => r.status === 200})
+
+    const endTime = new Date()
+
+    const promptEvalTime = promptEvalEndTime - startTime
+    if (promptEvalTime > 0) {
+        llamacpp_prompt_processing_second.add(prompt_tokens / (promptEvalEndTime - startTime) * 1.e3)
+    }
+
+    const completion_time = endTime - promptEvalEndTime
+    if (completions_tokens > 0 && completion_time > 0) {
+        llamacpp_tokens_second.add(completions_tokens / completion_time * 1.e3)
+    }
+    llamacpp_completions_truncated_rate.add(finish_reason === 'length')
+    llamacpp_completions_stop_rate.add(finish_reason === 'stop')
+
+    sleep(0.3)
+}

tools/server/chat-llama2.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+
+API_URL="${API_URL:-http://127.0.0.1:8080}"
+
+CHAT=(
+    "Hello, Assistant."
+    "Hello. How may I help you today?"
+)
+
+INSTRUCTION="A chat between a curious human and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the human's questions."
+
+trim() {
+    shopt -s extglob
+    set -- "${1##+([[:space:]])}"
+    printf "%s" "${1%%+([[:space:]])}"
+}
+
+trim_trailing() {
+    shopt -s extglob
+    printf "%s" "${1%%+([[:space:]])}"
+}
+
+format_prompt() {
+    if [[ "${#CHAT[@]}" -eq 0 ]]; then
+        echo -n "[INST] <<SYS>>\n${INSTRUCTION}\n<</SYS>>"
+    else
+        LAST_INDEX=$(( ${#CHAT[@]} - 1 ))
+        echo -n "${CHAT[$LAST_INDEX]}\n[INST] $1 [/INST]"
+    fi
+}
+
+tokenize() {
+    curl \
+        --silent \
+        --request POST \
+        --url "${API_URL}/tokenize" \
+        --header "Content-Type: application/json" \
+        --data-raw "$(jq -ns --arg content "$1" '{content:$content}')" \
+    | jq '.tokens[]'
+}
+
+N_KEEP=$(tokenize "[INST] <<SYS>>\n${INSTRUCTION}\n<</SYS>>" | wc -l)
+
+chat_completion() {
+    PROMPT="$(trim_trailing "$(format_prompt "$1")")"
+    DATA="$(echo -n "$PROMPT" | jq -Rs --argjson n_keep $N_KEEP '{
+        prompt: .,
+        temperature: 0.2,
+        top_k: 40,
+        top_p: 0.9,
+        n_keep: $n_keep,
+        n_predict: 1024,
+        stop: ["[INST]"],
+        stream: true
+    }')"
+
+    # Create a temporary file to hold the Python output
+    TEMPFILE=$(mktemp)
+
+    exec 3< <(curl \
+        --silent \
+        --no-buffer \
+        --request POST \
+        --url "${API_URL}/completion" \
+        --header "Content-Type: application/json" \
+        --data-raw "${DATA}")
+
+    python -c "
+import json
+import sys
+
+answer = ''
+while True:
+    line = sys.stdin.readline()
+    if not line:
+        break
+    if line.startswith('data: '):
+        json_content = line[6:].strip()
+        content = json.loads(json_content)['content']
+        sys.stdout.write(content)
+        sys.stdout.flush()
+        answer += content
+
+answer = answer.rstrip('\n')
+
+# Write the answer to the temporary file
+with open('$TEMPFILE', 'w') as f:
+    f.write(answer)
+    " <&3
+
+    exec 3<&-
+
+    # Read the answer from the temporary file
+    ANSWER=$(cat $TEMPFILE)
+
+    # Clean up the temporary file
+    rm $TEMPFILE
+
+    printf "\n"
+
+    CHAT+=("$1" "$(trim "$ANSWER")")
+}
+
+while true; do
+    echo -en "\033[0;32m"  # Green color
+    read -r -e -p "> " QUESTION
+    echo -en "\033[0m"  # Reset color
+    chat_completion "${QUESTION}"
+done

tools/server/chat.mjs

@@ -0,0 +1,131 @@
+import * as readline from 'node:readline'
+import { stdin, stdout } from 'node:process'
+import { readFileSync } from 'node:fs'
+import { SchemaConverter }  from './public_legacy/json-schema-to-grammar.mjs'
+
+const args = process.argv.slice(2);
+const grammarJsonSchemaFile = args.find(
+    (_, index) => args[index - 1] === "--grammar-json-schema"
+);
+
+const no_cached_prompt = args.find(
+    (_, index) => args[index - 1] === "--no-cache-prompt"
+) ?? "false";
+
+const grammarFile = args.find((_, index) => args[index - 1] === "--grammar");
+
+// Example usage: function,arguments
+const grammarJsonSchemaPropOrder = args.find(
+    (_, index) => args[index - 1] === "--grammar-json-schema-prop-order"
+);
+const propOrder = grammarJsonSchemaPropOrder
+    ? grammarJsonSchemaPropOrder
+          .split(",")
+          .reduce((acc, cur, index) => ({ ...acc, [cur]: index }), {})
+    : {};
+
+let grammar = null
+if (grammarJsonSchemaFile) {
+    let schema = JSON.parse(readFileSync(grammarJsonSchemaFile, 'utf-8'))
+    const converter = new SchemaConverter({prop_order: propOrder, allow_fetch: true})
+    schema = await converter.resolveRefs(schema, grammarJsonSchemaFile)
+    converter.visit(schema, '')
+    grammar = converter.formatGrammar()
+}
+if (grammarFile) {
+    grammar = readFileSync(grammarFile, 'utf-8')
+}
+
+// for cached prompt
+let slot_id = -1;
+
+const API_URL = 'http://127.0.0.1:8080'
+
+const chat = [
+    {
+        human: "Hello, Assistant.",
+        assistant: "Hello. How may I help you today?"
+    },
+    {
+        human: "Please tell me the largest city in Europe.",
+        assistant: "Sure. The largest city in Europe is Moscow, the capital of Russia."
+    },
+]
+
+const instruction = `A chat between a curious human and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the human's questions.`
+
+function format_prompt(question) {
+    return `${instruction}\n${
+        chat.map(m =>`### Human: ${m.human}\n### Assistant: ${m.assistant}`).join("\n")
+    }\n### Human: ${question}\n### Assistant:`
+}
+
+async function tokenize(content) {
+    const result = await fetch(`${API_URL}/tokenize`, {
+        method: 'POST',
+        body: JSON.stringify({ content })
+    })
+
+    if (!result.ok) {
+        return []
+    }
+
+    return await result.json().tokens
+}
+
+const n_keep = await tokenize(instruction).length
+
+async function chat_completion(question) {
+    const result = await fetch(`${API_URL}/completion`, {
+        method: 'POST',
+        body: JSON.stringify({
+            prompt: format_prompt(question),
+            temperature: 0.2,
+            top_k: 40,
+            top_p: 0.9,
+            n_keep: n_keep,
+            n_predict: 256,
+            cache_prompt: no_cached_prompt === "false",
+            slot_id: slot_id,
+            stop: ["\n### Human:"], // stop completion after generating this
+            grammar,
+            stream: true,
+        })
+    })
+
+    if (!result.ok) {
+        return
+    }
+
+    let answer = ''
+
+    for await (var chunk of result.body) {
+        const t = Buffer.from(chunk).toString('utf8')
+        if (t.startsWith('data: ')) {
+            const message = JSON.parse(t.substring(6))
+            slot_id = message.slot_id
+            answer += message.content
+            process.stdout.write(message.content)
+            if (message.stop) {
+                if (message.truncated) {
+                    chat.shift()
+                }
+                break
+            }
+        }
+    }
+
+    process.stdout.write('\n')
+    chat.push({ human: question, assistant: answer.trimStart() })
+}
+
+const rl = readline.createInterface({ input: stdin, output: stdout });
+
+const readlineQuestion = (rl, query, options) => new Promise((resolve, reject) => {
+    rl.question(query, options, resolve)
+});
+
+while(true) {
+    const question = await readlineQuestion(rl, '> ')
+    await chat_completion(question)
+}

tools/server/chat.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+API_URL="${API_URL:-http://127.0.0.1:8080}"
+
+CHAT=(
+    "Hello, Assistant."
+    "Hello. How may I help you today?"
+    "Please tell me the largest city in Europe."
+    "Sure. The largest city in Europe is Moscow, the capital of Russia."
+)
+
+INSTRUCTION="A chat between a curious human and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the human's questions."
+
+trim() {
+    shopt -s extglob
+    set -- "${1##+([[:space:]])}"
+    printf "%s" "${1%%+([[:space:]])}"
+}
+
+trim_trailing() {
+    shopt -s extglob
+    printf "%s" "${1%%+([[:space:]])}"
+}
+
+format_prompt() {
+    echo -n "${INSTRUCTION}"
+    printf "\n### Human: %s\n### Assistant: %s" "${CHAT[@]}" "$1"
+}
+
+tokenize() {
+    curl \
+        --silent \
+        --request POST \
+        --url "${API_URL}/tokenize" \
+        --header "Content-Type: application/json" \
+        --data-raw "$(jq -ns --arg content "$1" '{content:$content}')" \
+    | jq '.tokens[]'
+}
+
+N_KEEP=$(tokenize "${INSTRUCTION}" | wc -l)
+
+chat_completion() {
+    PROMPT="$(trim_trailing "$(format_prompt "$1")")"
+    DATA="$(echo -n "$PROMPT" | jq -Rs --argjson n_keep $N_KEEP '{
+        prompt: .,
+        temperature: 0.2,
+        top_k: 40,
+        top_p: 0.9,
+        n_keep: $n_keep,
+        n_predict: 256,
+        cache_prompt: true,
+        stop: ["\n### Human:"],
+        stream: true
+    }')"
+
+    ANSWER=''
+
+    while IFS= read -r LINE; do
+        if [[ $LINE = data:* ]]; then
+            CONTENT="$(echo "${LINE:5}" | jq -r '.content')"
+            printf "%s" "${CONTENT}"
+            ANSWER+="${CONTENT}"
+        fi
+    done < <(curl \
+        --silent \
+        --no-buffer \
+        --request POST \
+        --url "${API_URL}/completion" \
+        --header "Content-Type: application/json" \
+        --data-raw "${DATA}")
+
+    printf "\n"
+
+    CHAT+=("$1" "$(trim "$ANSWER")")
+}
+
+while true; do
+    read -r -e -p "> " QUESTION
+    chat_completion "${QUESTION}"
+done

tools/server/public/loading.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta http-equiv="refresh" content="5">
+    </head>
+    <body>
+        <div id="loading">
+            The model is loading. Please wait.<br/>
+            The user interface will appear soon.
+        </div>
+    </body>
+</html>

tools/server/public_legacy/colorthemes.css

@@ -0,0 +1,402 @@
+@import url("theme-snowstorm.css");
+@import url("theme-polarnight.css");
+@import url("theme-ketivah.css");
+@import url("theme-mangotango.css");
+@import url("theme-playground.css");
+@import url("theme-beeninorder.css");
+
+:root {
+/* ---------- PRIMARY COLORS ----------------- */
+--primary-color-1: hsl(217.5, 26.7%, 94.1%);
+    --primary-color-1-hue:             217.5;
+    --primary-color-1-saturation:      26.7%;
+    --primary-color-1-lightness:       94.1%;
+
+--primary-color-2: hsl(218.2, 26.8%, 92.0%);
+    --primary-color-2-hue:             218.2;
+    --primary-color-2-saturation:      26.8%;
+    --primary-color-2-lightness:       92.0%;
+
+--primary-color-3: hsl(218.8, 27.9%, 88.0%);
+    --primary-color-3-hue:             218.8;
+    --primary-color-3-saturation:      27.9%;
+    --primary-color-3-lightness:       88.0%;
+
+--primary-color-4: hsl(218.8, 18.3%, 81.8%);
+    --primary-color-4-hue:             218.8;
+    --primary-color-4-saturation:      18.3%;
+    --primary-color-4-lightness:       81.8%;
+
+
+/* ---------- SECONDARY COLORS --------------- */
+--secondary-color-1: hsl(220.0, 16.4%, 21.6%);
+    --secondary-color-1-hue:             220.0;
+    --secondary-color-1-saturation:      16.4%;
+    --secondary-color-1-lightness:       21.6%;
+
+--secondary-color-2: hsl(221.7, 16.3%, 27.6%);
+    --secondary-color-2-hue:             221.7;
+    --secondary-color-2-saturation:      16.3%;
+    --secondary-color-2-lightness:       27.6%;
+
+--secondary-color-3: hsl(220.0, 16.8%, 31.6%);
+    --secondary-color-3-hue:             220.0;
+    --secondary-color-3-saturation:      16.8%;
+    --secondary-color-3-lightness:       31.6%;
+
+--secondary-color-4: hsl(220.0, 16.5%, 35.7%);
+    --secondary-color-4-hue:             220.0;
+    --secondary-color-4-saturation:      16.5%;
+    --secondary-color-4-lightness:       35.7%;
+
+
+
+/* ----------- NUANCES COLORS ---------------- */
+--theme-nuance-color-1: hsl(178.7, 25.1%, 64.9%);
+    --theme-nuance-color-1-hue:             178.7;
+    --theme-nuance-color-1-saturation:      25.1%;
+    --theme-nuance-color-1-lightness:       64.9%;
+
+--theme-nuance-color-2: hsl(193.3, 43.4%, 67.5%);
+    --theme-nuance-color-2-hue:             193.3;
+    --theme-nuance-color-2-saturation:      43.4%;
+    --theme-nuance-color-2-lightness:       67.5%;
+
+--theme-nuance-color-3: hsl(210.0, 34.0%, 63.1%);
+    --theme-nuance-color-3-hue:             210.0;
+    --theme-nuance-color-3-saturation:      34.0%;
+    --theme-nuance-color-3-lightness:       63.1%;
+
+--theme-nuance-color-4: hsl(213.1, 32.0%, 52.2%);
+    --theme-nuance-color-4-hue:             213.1;
+    --theme-nuance-color-4-saturation:      32.0%;
+    --theme-nuance-color-4-lightness:       52.2%;
+
+
+
+/* ----------- ROYGP COLORS ------------------ */
+--theme-red-color:    hsl(32.5, 80%, 50%);
+--theme-orange-color: hsl(32.5, 70%, 45%);
+--theme-yellow-color: hsl(40.0,   0.6%, 73.3%);
+--theme-green-color:  hsl(92.4,  27.8%, 64.7%);
+--theme-purple-color: hsl(311.1, 20.2%, 63.1%);
+
+
+
+/* ------------------------------------------- */
+--background-color-1:    var(--primary-color-1);
+--background-color-2:    var(--primary-color-2);
+--background-color-3:    var(--primary-color-3);
+--background-color-4:    var(--primary-color-4);
+
+--border-color-1:        var(--primary-color-2);
+--border-color-2:        var(--primary-color-3);
+--border-color-3:        var(--primary-color-4);
+
+--border-focus-color:    var(--theme-nuance-color-2);
+--border-focus-shadow:   var(--theme-nuance-color-1);
+
+--text-color-plain:      var(--secondary-color-1);
+--text-color-subtile-1:  var(--secondary-color-2);
+--text-color-subtile-2:  var(--secondary-color-3);
+
+--code-background-color: var(--secondary-color-2);
+--code-text-color:       var(--primary-color-2);
+
+--ui-range-thumb-color:  var(--theme-nuance-color-3);
+--ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+--textarea-border-color: var(--secondary-color-4);
+
+--chat-id-color:         var(--theme-nuance-color-4);
+
+
+
+/* ------------------------------------------- */
+--button-alert-text-hover:       var(--primary-color-1);
+--button-alert-color-hover:      var(--theme-orange-color);
+--button-alert-border-hover:     var(--theme-orange-color);
+
+--button-alert-text-active:      var(--primary-color-1);
+--button-alert-color-active:     var(--theme-red-color);
+--button-alert-border-active:    var(--theme-red-color);
+
+
+
+/* ----------- PRIMARY BUTTONS --------------- */
+/* - button should immediately catch the eye - */
+--button-primary-text:   var(--secondary-color-1);
+--button-primary-color:  var(--theme-nuance-color-3);
+--button-primary-border: var(--theme-nuance-color-3);
+
+
+/* ---------hover---------- */
+--button-primary-text-hover:
+    hsl(217.5,
+    calc(var(--secondary-color-1-saturation) + 35%),
+    calc(var(--secondary-color-1-lightness)  - 30%));
+
+--button-primary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) -  2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+--button-primary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) -  2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+
+/* ---------active--------- */
+--button-primary-text-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 35%));
+
+--button-primary-color-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 25%));
+
+--button-primary-border-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 25%));
+
+
+
+/* ---------- SECONDARY BUTTONS -------------- */
+/* these should NOT immediately catch the eye  */
+--button-secondary-text:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 50%));
+
+--button-secondary-color:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+--button-secondary-border:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+
+/* ---------hover---------- */
+--button-secondary-text-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 22%),
+    calc(var(--theme-nuance-color-3-lightness)  +  1%));
+
+--button-secondary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 22%),
+    calc(var(--theme-nuance-color-3-lightness)  +  1%));
+
+
+/* ---------active--------- */
+--button-secondary-text-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) + 40%),
+    calc(var(--theme-nuance-color-3-lightness)  - 55%));
+
+--button-secondary-color-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 30%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-secondary-border-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 30%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+
+
+/* ---------- TERTIARY BUTTONS --------------- */
+/* ---------- disabled buttons --------------- */
+--button-tertiary-text:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-tertiary-color:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+--button-tertiary-border:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+/* ---------hover---------- */
+--button-tertiary-text-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-tertiary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+--button-tertiary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+}
+
+/*
+
+.theme-template {
+
+
+    If light theme: should go from bright to darker
+    If dark theme: should go from dark to brighter
+    ideally this should not be anything but steps of
+    gray or slightly variants from it
+
+    --primary-color-1: #2E3440;
+    --primary-color-2: #3B4252;
+    --primary-color-3: #434C5E;
+    --primary-color-4: #4C566A;
+
+
+
+    If light theme: should go from dark to brighter
+    If dark theme: should go from bright to darker
+    ideally this should not be anything but steps of
+    gray or slightly variants from it
+
+    --secondary-color-1: #ECEFF4;
+    --secondary-color-2: #E5E9F0;
+    --secondary-color-3: #D8DEE9;
+    --secondary-color-4: #C8CED9;
+
+
+
+    Choose wisely nuance colors. It is not easy to find
+    4 harmonizing nuance colors. But keep in mind, that
+    only one accent color could work too.
+
+    --theme-nuance-color-1: #8FBCBB;
+    --theme-nuance-color-2: #88C0D0;
+    --theme-nuance-color-3: #81A1C1;
+    --theme-nuance-color-4: #5E81AC;
+
+
+
+    adapt the color red, orange, yellow, green,
+    purple to the 'mood' of your overall design
+    e.g is it low-contrast? vibrant? dynamic? etc
+
+    --theme-red-color:    #BF616A;
+    --theme-orange-color: #D08770;
+    --theme-yellow-color: #EBCB8B;
+    --theme-green-color:  #A3BE8C;
+    --theme-purple-color: #B48EAD;
+
+
+
+NOTE: comment all those line `--- ...` out
+------------------------------------------------
+--background-color-1:
+--background-color-2:
+--background-color-3:
+--background-color-4:
+
+--border-color-1:
+--border-color-2:
+--border-color-3:
+
+--border-focus-color:
+--border-focus-shadow:
+
+--text-color-plain:
+--text-color-subtile-1:
+--text-color-subtile-2:
+
+--code-background-color:
+--code-text-color:
+
+--ui-range-thumb-color:
+--ui-range-thumb-border:
+
+--textarea-border-color:
+
+
+
+-------------------------------------------
+--button-alert-text-hover:
+--button-alert-color-hover:
+--button-alert-border-hover:
+
+--button-alert-text-active:
+--button-alert-color-active:
+--button-alert-border-active:
+
+
+
+----------- PRIMARY -----------------------
+--button should immediately catch the eye--
+
+--button-primary-text:
+--button-primary-color:
+--button-primary-border:
+
+
+---------hover----------
+--button-primary-text-hover:
+--button-primary-color-hover:
+--button-primary-border-hover:
+
+
+---------active---------
+--button-primary-text-active:
+--button-primary-color-active:
+--button-primary-border-active:
+
+
+
+------------ SECONDARY ------------------------
+--button should NOT immediately catch the eye--
+
+--button-secondary-text:
+--button-secondary-color:
+--button-secondary-border:
+
+
+---------hover----------
+--button-secondary-text-hover:
+--button-secondary-color-hover:
+--button-secondary-border-hover:
+
+
+---------active---------
+--button-secondary-text-active:
+--button-secondary-color-active:
+--button-secondary-border-active:
+
+
+
+---------- TERTIARY -----------------------
+---------- disabled buttons ---------------
+--button-tertiary-text:
+--button-tertiary-color:
+--button-tertiary-border:
+
+
+---------hover----------
+--button-tertiary-text:
+--button-tertiary-color:
+--button-tertiary-border:
+
+}
+
+*/

tools/server/public_legacy/completion.js

@@ -0,0 +1,209 @@
+const paramDefaults = {
+  stream: true,
+  n_predict: 500,
+  temperature: 0.2,
+  stop: ["</s>"]
+};
+
+let generation_settings = null;
+
+
+// Completes the prompt as a generator. Recommended for most use cases.
+//
+// Example:
+//
+//    import { llama } from '/completion.js'
+//
+//    const request = llama("Tell me a joke", {n_predict: 800})
+//    for await (const chunk of request) {
+//      document.write(chunk.data.content)
+//    }
+//
+export async function* llama(prompt, params = {}, config = {}) {
+  let controller = config.controller;
+  const api_url = config.api_url?.replace(/\/+$/, '') || "";
+
+  if (!controller) {
+    controller = new AbortController();
+  }
+
+  const completionParams = { ...paramDefaults, ...params, prompt };
+
+  const response = await fetch(`${api_url}${config.endpoint || '/completion'}`, {
+    method: 'POST',
+    body: JSON.stringify(completionParams),
+    headers: {
+      'Connection': 'keep-alive',
+      'Content-Type': 'application/json',
+      'Accept': 'text/event-stream',
+      ...(params.api_key ? {'Authorization': `Bearer ${params.api_key}`} : {})
+    },
+    signal: controller.signal,
+  });
+
+  const reader = response.body.getReader();
+  const decoder = new TextDecoder();
+
+  let content = "";
+  let leftover = ""; // Buffer for partially read lines
+
+  try {
+    let cont = true;
+
+    while (cont) {
+      const result = await reader.read();
+      if (result.done) {
+        break;
+      }
+
+      // Add any leftover data to the current chunk of data
+      const text = leftover + decoder.decode(result.value);
+
+      // Check if the last character is a line break
+      const endsWithLineBreak = text.endsWith('\n');
+
+      // Split the text into lines
+      let lines = text.split('\n');
+
+      // If the text doesn't end with a line break, then the last line is incomplete
+      // Store it in leftover to be added to the next chunk of data
+      if (!endsWithLineBreak) {
+        leftover = lines.pop();
+      } else {
+        leftover = ""; // Reset leftover if we have a line break at the end
+      }
+
+      // Parse all sse events and add them to result
+      const regex = /^(\S+):\s(.*)$/gm;
+      for (const line of lines) {
+        const match = regex.exec(line);
+        if (match) {
+          result[match[1]] = match[2];
+          if (result.data === '[DONE]') {
+            cont = false;
+            break;
+          }
+
+          // since we know this is llama.cpp, let's just decode the json in data
+          if (result.data) {
+            result.data = JSON.parse(result.data);
+            content += result.data.content;
+
+            // yield
+            yield result;
+
+            // if we got a stop token from server, we will break here
+            if (result.data.stop) {
+              if (result.data.generation_settings) {
+                generation_settings = result.data.generation_settings;
+              }
+              cont = false;
+              break;
+            }
+          }
+          if (result.error) {
+            try {
+              result.error = JSON.parse(result.error);
+              if (result.error.message.includes('slot unavailable')) {
+                // Throw an error to be caught by upstream callers
+                throw new Error('slot unavailable');
+              } else {
+                console.error(`llama.cpp error [${result.error.code} - ${result.error.type}]: ${result.error.message}`);
+              }
+            } catch(e) {
+              console.error(`llama.cpp error ${result.error}`)
+            }
+          }
+        }
+      }
+    }
+  } catch (e) {
+    if (e.name !== 'AbortError') {
+      console.error("llama error: ", e);
+    }
+    throw e;
+  }
+  finally {
+    controller.abort();
+  }
+
+  return content;
+}
+
+// Call llama, return an event target that you can subscribe to
+//
+// Example:
+//
+//    import { llamaEventTarget } from '/completion.js'
+//
+//    const conn = llamaEventTarget(prompt)
+//    conn.addEventListener("message", (chunk) => {
+//      document.write(chunk.detail.content)
+//    })
+//
+export const llamaEventTarget = (prompt, params = {}, config = {}) => {
+  const eventTarget = new EventTarget();
+  (async () => {
+    let content = "";
+    for await (const chunk of llama(prompt, params, config)) {
+      if (chunk.data) {
+        content += chunk.data.content;
+        eventTarget.dispatchEvent(new CustomEvent("message", { detail: chunk.data }));
+      }
+      if (chunk.data.generation_settings) {
+        eventTarget.dispatchEvent(new CustomEvent("generation_settings", { detail: chunk.data.generation_settings }));
+      }
+      if (chunk.data.timings) {
+        eventTarget.dispatchEvent(new CustomEvent("timings", { detail: chunk.data.timings }));
+      }
+    }
+    eventTarget.dispatchEvent(new CustomEvent("done", { detail: { content } }));
+  })();
+  return eventTarget;
+}
+
+// Call llama, return a promise that resolves to the completed text. This does not support streaming
+//
+// Example:
+//
+//     llamaPromise(prompt).then((content) => {
+//       document.write(content)
+//     })
+//
+//     or
+//
+//     const content = await llamaPromise(prompt)
+//     document.write(content)
+//
+export const llamaPromise = (prompt, params = {}, config = {}) => {
+  return new Promise(async (resolve, reject) => {
+    let content = "";
+    try {
+      for await (const chunk of llama(prompt, params, config)) {
+        content += chunk.data.content;
+      }
+      resolve(content);
+    } catch (error) {
+      reject(error);
+    }
+  });
+};
+
+/**
+ * (deprecated)
+ */
+export const llamaComplete = async (params, controller, callback) => {
+  for await (const chunk of llama(params.prompt, params, { controller })) {
+    callback(chunk);
+  }
+}
+
+// Get the model info from the server. This is useful for getting the context window and so on.
+export const llamaModelInfo = async (config = {}) => {
+  if (!generation_settings) {
+    const api_url = config.api_url?.replace(/\/+$/, '') || "";
+    const props = await fetch(`${api_url}/props`).then(r => r.json());
+    generation_settings = props.default_generation_settings;
+  }
+  return generation_settings;
+}

tools/server/public_legacy/json-schema-to-grammar.mjs

@@ -0,0 +1,838 @@
+// WARNING: This file was ported from json_schema_to_grammar.py, please fix bugs / add features there first.
+const SPACE_RULE = '| " " | "\\n"{1,2} [ \\t]{0,20}';
+
+function _buildRepetition(itemRule, minItems, maxItems, opts={}) {
+  if (maxItems == 0) {
+    return '';
+  }
+  if (minItems === 0 && maxItems === 1) {
+    return `${itemRule}?`;
+  }
+
+
+  const separatorRule = opts.separatorRule ?? '';
+  const itemRuleIsLiteral = opts.itemRuleIsLiteral ?? false
+
+  if (separatorRule === '') {
+    if (minItems === 1 && maxItems === undefined) {
+      return `${itemRule}+`;
+    } else if (minItems === 0 && maxItems === undefined) {
+      return `${itemRule}*`;
+    } else {
+      return `${itemRule}{${minItems},${maxItems !== undefined ? maxItems : ''}}`;
+    }
+  }
+
+  const result = itemRule + ' ' + _buildRepetition(`(${separatorRule} ${itemRule})`, minItems > 0 ? minItems - 1 : 0, maxItems !== undefined ? maxItems - 1 : undefined);
+  return minItems === 0 ? `(${result})?` : result;
+}
+
+function _generateMinMaxInt(minValue, maxValue, out, decimalsLeft = 16, topLevel = true) {
+  const hasMin = minValue !== null;
+  const hasMax = maxValue !== null;
+
+  function digitRange(fromChar, toChar) {
+      out.push("[");
+      if (fromChar === toChar) {
+          out.push(fromChar);
+      } else {
+          out.push(fromChar);
+          out.push("-");
+          out.push(toChar);
+      }
+      out.push("]");
+  }
+
+  function moreDigits(minDigits, maxDigits) {
+      out.push("[0-9]");
+      if (minDigits === maxDigits && minDigits === 1) {
+          return;
+      }
+      out.push("{");
+      out.push(minDigits.toString());
+      if (maxDigits !== minDigits) {
+          out.push(",");
+          if (maxDigits !== Number.MAX_SAFE_INTEGER) {
+              out.push(maxDigits.toString());
+          }
+      }
+      out.push("}");
+  }
+
+  function uniformRange(fromStr, toStr) {
+      let i = 0;
+      while (i < fromStr.length && fromStr[i] === toStr[i]) {
+          i++;
+      }
+      if (i > 0) {
+          out.push("\"");
+          out.push(fromStr.slice(0, i));
+          out.push("\"");
+      }
+      if (i < fromStr.length) {
+          if (i > 0) {
+              out.push(" ");
+          }
+          const subLen = fromStr.length - i - 1;
+          if (subLen > 0) {
+              const fromSub = fromStr.slice(i + 1);
+              const toSub = toStr.slice(i + 1);
+              const subZeros = "0".repeat(subLen);
+              const subNines = "9".repeat(subLen);
+
+              let toReached = false;
+              out.push("(");
+              if (fromSub === subZeros) {
+                  digitRange(fromStr[i], String.fromCharCode(toStr.charCodeAt(i) - 1));
+                  out.push(" ");
+                  moreDigits(subLen, subLen);
+              } else {
+                  out.push("[");
+                  out.push(fromStr[i]);
+                  out.push("] ");
+                  out.push("(");
+                  uniformRange(fromSub, subNines);
+                  out.push(")");
+                  if (fromStr.charCodeAt(i) < toStr.charCodeAt(i) - 1) {
+                      out.push(" | ");
+                      if (toSub === subNines) {
+                          digitRange(String.fromCharCode(fromStr.charCodeAt(i) + 1), toStr[i]);
+                          toReached = true;
+                      } else {
+                          digitRange(String.fromCharCode(fromStr.charCodeAt(i) + 1), String.fromCharCode(toStr.charCodeAt(i) - 1));
+                      }
+                      out.push(" ");
+                      moreDigits(subLen, subLen);
+                  }
+              }
+              if (!toReached) {
+                  out.push(" | ");
+                  digitRange(toStr[i], toStr[i]);
+                  out.push(" ");
+                  uniformRange(subZeros, toSub);
+              }
+              out.push(")");
+          } else {
+              out.push("[");
+              out.push(fromStr[i]);
+              out.push("-");
+              out.push(toStr[i]);
+              out.push("]");
+          }
+      }
+  }
+
+  if (hasMin && hasMax) {
+      if (minValue < 0 && maxValue < 0) {
+          out.push("\"-\" (");
+          _generateMinMaxInt(-maxValue, -minValue, out, decimalsLeft, true);
+          out.push(")");
+          return;
+      }
+
+      if (minValue < 0) {
+          out.push("\"-\" (");
+          _generateMinMaxInt(0, -minValue, out, decimalsLeft, true);
+          out.push(") | ");
+          minValue = 0;
+      }
+
+      let minS = minValue.toString();
+      const maxS = maxValue.toString();
+      const minDigits = minS.length;
+      const maxDigits = maxS.length;
+
+      for (let digits = minDigits; digits < maxDigits; digits++) {
+          uniformRange(minS, "9".repeat(digits));
+          minS = "1" + "0".repeat(digits);
+          out.push(" | ");
+      }
+      uniformRange(minS, maxS);
+      return;
+  }
+
+  const lessDecimals = Math.max(decimalsLeft - 1, 1);
+
+  if (hasMin) {
+      if (minValue < 0) {
+          out.push("\"-\" (");
+          _generateMinMaxInt(null, -minValue, out, decimalsLeft, false);
+          out.push(") | [0] | [1-9] ");
+          moreDigits(0, decimalsLeft - 1);
+      } else if (minValue === 0) {
+          if (topLevel) {
+              out.push("[0] | [1-9] ");
+              moreDigits(0, lessDecimals);
+          } else {
+              moreDigits(1, decimalsLeft);
+          }
+      } else if (minValue <= 9) {
+          const c = minValue.toString();
+          const range_start = topLevel ? '1' : '0';
+          if (c > range_start) {
+              digitRange(range_start, String.fromCharCode(c.charCodeAt(0) - 1));
+              out.push(" ");
+              moreDigits(1, lessDecimals);
+              out.push(" | ");
+          }
+          digitRange(c, "9");
+          out.push(" ");
+          moreDigits(0, lessDecimals);
+      } else {
+          const minS = minValue.toString();
+          const length = minS.length;
+          const c = minS[0];
+
+          if (c > "1") {
+              digitRange(topLevel ? "1" : "0", String.fromCharCode(c.charCodeAt(0) - 1));
+              out.push(" ");
+              moreDigits(length, lessDecimals);
+              out.push(" | ");
+          }
+          digitRange(c, c);
+          out.push(" (");
+          _generateMinMaxInt(parseInt(minS.slice(1)), null, out, lessDecimals, false);
+          out.push(")");
+          if (c < "9") {
+              out.push(" | ");
+              digitRange(String.fromCharCode(c.charCodeAt(0) + 1), "9");
+              out.push(" ");
+              moreDigits(length - 1, lessDecimals);
+          }
+      }
+      return;
+  }
+
+  if (hasMax) {
+      if (maxValue >= 0) {
+          if (topLevel) {
+              out.push("\"-\" [1-9] ");
+              moreDigits(0, lessDecimals);
+              out.push(" | ");
+          }
+          _generateMinMaxInt(0, maxValue, out, decimalsLeft, true);
+      } else {
+          out.push("\"-\" (");
+          _generateMinMaxInt(-maxValue, null, out, decimalsLeft, false);
+          out.push(")");
+      }
+      return;
+  }
+
+  throw new Error("At least one of minValue or maxValue must be set");
+}
+
+class BuiltinRule {
+  constructor(content, deps) {
+    this.content = content;
+    this.deps = deps || [];
+  }
+}
+
+const PRIMITIVE_RULES = {
+  boolean        : new BuiltinRule('("true" | "false") space', []),
+  'decimal-part' : new BuiltinRule('[0-9]{1,16}', []),
+  'integral-part': new BuiltinRule('[0] | [1-9] [0-9]{0,15}', []),
+  number         : new BuiltinRule('("-"? integral-part) ("." decimal-part)? ([eE] [-+]? integral-part)? space', ['integral-part', 'decimal-part']),
+  integer        : new BuiltinRule('("-"? integral-part) space', ['integral-part']),
+  value          : new BuiltinRule('object | array | string | number | boolean | null', ['object', 'array', 'string', 'number', 'boolean', 'null']),
+  object         : new BuiltinRule('"{" space ( string ":" space value ("," space string ":" space value)* )? "}" space', ['string', 'value']),
+  array          : new BuiltinRule('"[" space ( value ("," space value)* )? "]" space', ['value']),
+  uuid           : new BuiltinRule('"\\"" [0-9a-fA-F]{8} "-" [0-9a-fA-F]{4} "-" [0-9a-fA-F]{4} "-" [0-9a-fA-F]{4} "-" [0-9a-fA-F]{12} "\\"" space', []),
+  char           : new BuiltinRule(`[^"\\\\\\x7F\\x00-\\x1F] | [\\\\] (["\\\\bfnrt] | "u" [0-9a-fA-F]{4})`, []),
+  string         : new BuiltinRule(`"\\"" char* "\\"" space`, ['char']),
+  null           : new BuiltinRule('"null" space', []),
+};
+
+// TODO: support "uri", "email" string formats
+const STRING_FORMAT_RULES = {
+  'date'            : new BuiltinRule('[0-9]{4} "-" ( "0" [1-9] | "1" [0-2] ) "-" ( \"0\" [1-9] | [1-2] [0-9] | "3" [0-1] )', []),
+  'time'            : new BuiltinRule('([01] [0-9] | "2" [0-3]) ":" [0-5] [0-9] ":" [0-5] [0-9] ( "." [0-9]{3} )? ( "Z" | ( "+" | "-" ) ( [01] [0-9] | "2" [0-3] ) ":" [0-5] [0-9] )', []),
+  'date-time'       : new BuiltinRule('date "T" time', ['date', 'time']),
+  'date-string'     : new BuiltinRule('"\\"" date "\\"" space', ['date']),
+  'time-string'     : new BuiltinRule('"\\"" time "\\"" space', ['time']),
+  'date-time-string': new BuiltinRule('"\\"" date-time "\\"" space', ['date-time']),
+}
+
+const RESERVED_NAMES = {'root': true, ...PRIMITIVE_RULES, ...STRING_FORMAT_RULES};
+
+const INVALID_RULE_CHARS_RE = /[^\dA-Za-z-]+/g;
+const GRAMMAR_LITERAL_ESCAPE_RE = /[\n\r"]/g;
+const GRAMMAR_RANGE_LITERAL_ESCAPE_RE = /[\n\r"\]\-\\]/g;
+const GRAMMAR_LITERAL_ESCAPES = { '\r': '\\r', '\n': '\\n', '"': '\\"', '-': '\\-', ']': '\\]' };
+
+const NON_LITERAL_SET = new Set('|.()[]{}*+?');
+const ESCAPED_IN_REGEXPS_BUT_NOT_IN_LITERALS = new Set('^$.[]()|{}*+?');
+
+export class SchemaConverter {
+  constructor(options) {
+    this._propOrder = options.prop_order || {};
+    this._allowFetch = options.allow_fetch || false;
+    this._dotall = options.dotall || false;
+    this._rules = {'space': SPACE_RULE};
+    this._refs = {};
+    this._refsBeingResolved = new Set();
+  }
+
+  _formatLiteral(literal) {
+    const escaped = literal.replace(
+      GRAMMAR_LITERAL_ESCAPE_RE,
+      m => GRAMMAR_LITERAL_ESCAPES[m]
+    );
+    return `"${escaped}"`;
+  }
+
+  _formatRangeChar(literal) {
+    return JSON.stringify(literal).slice(1, -1).replace(
+      GRAMMAR_RANGE_LITERAL_ESCAPE_RE,
+      m => GRAMMAR_LITERAL_ESCAPES[m]
+    );
+  }
+
+  _addRule(name, rule) {
+    let escName = name.replace(INVALID_RULE_CHARS_RE, '-');
+    let key = escName;
+
+    if (escName in this._rules) {
+      if (this._rules[escName] === rule) {
+        return key;
+      }
+
+      let i = 0;
+      while ((`${escName}${i}` in this._rules) && (this._rules[`${escName}${i}`] !== rule)) {
+        i += 1;
+      }
+      key = `${escName}${i}`;
+    }
+
+    this._rules[key] = rule;
+    return key;
+  }
+
+  async resolveRefs(schema, url) {
+    const visit = async (n) => {
+      if (Array.isArray(n)) {
+        return Promise.all(n.map(visit));
+      } else if (typeof n === 'object' && n !== null) {
+        let ref = n.$ref;
+        let target;
+        if (ref !== undefined && !this._refs[ref]) {
+          if (ref.startsWith('https://')) {
+            if (!this._allowFetch) {
+              throw new Error('Fetching remote schemas is not allowed (use --allow-fetch for force)');
+            }
+            const fetch = (await import('node-fetch')).default;
+
+            const fragSplit = ref.split('#');
+            const baseUrl = fragSplit[0];
+
+            target = this._refs[baseUrl];
+            if (!target) {
+              target = await this.resolveRefs(await fetch(ref).then(res => res.json()), baseUrl);
+              this._refs[baseUrl] = target;
+            }
+
+            if (fragSplit.length === 1 || fragSplit[fragSplit.length - 1] === '') {
+              return target;
+            }
+          } else if (ref.startsWith('#/')) {
+            target = schema;
+            ref = `${url}${ref}`;
+            n.$ref = ref;
+          } else {
+            throw new Error(`Unsupported ref ${ref}`);
+          }
+
+          const selectors = ref.split('#')[1].split('/').slice(1);
+          for (const sel of selectors) {
+            if (!target || !(sel in target)) {
+              throw new Error(`Error resolving ref ${ref}: ${sel} not in ${JSON.stringify(target)}`);
+            }
+            target = target[sel];
+          }
+
+          this._refs[ref] = target;
+        } else {
+          await Promise.all(Object.values(n).map(visit));
+        }
+      }
+
+      return n;
+    };
+
+    return visit(schema);
+  }
+
+  _generateUnionRule(name, altSchemas) {
+    return altSchemas
+      .map((altSchema, i) => this.visit(altSchema, `${name ?? ''}${name ? '-' : 'alternative-'}${i}`))
+      .join(' | ');
+  }
+
+  _visitPattern(pattern, name) {
+    if (!pattern.startsWith('^') || !pattern.endsWith('$')) {
+      throw new Error('Pattern must start with "^" and end with "$"');
+    }
+    pattern = pattern.slice(1, -1);
+    const subRuleIds = {};
+
+    let i = 0;
+    const length = pattern.length;
+
+    const getDot = () => {
+      let rule;
+      if (this._dotall) {
+        rule = '[\\U00000000-\\U0010FFFF]';
+      } else {
+        // Accept any character... except \n and \r line break chars (\x0A and \xOD)
+        rule = '[^\\x0A\\x0D]';
+      }
+      return this._addRule('dot', rule);
+    };
+
+
+    const toRule = ([s, isLiteral]) => isLiteral ? "\"" + s + "\"" : s;
+
+    const transform = () => {
+      const start = i;
+      // For each component of this sequence, store its string representation and whether it's a literal.
+      // We only need a flat structure here to apply repetition operators to the last item, and
+      // to merge literals at the and (we're parsing grouped ( sequences ) recursively and don't treat '|' specially
+      // (GBNF's syntax is luckily very close to regular expressions!)
+      const seq = [];
+
+      const joinSeq = () => {
+        const ret = [];
+        for (const [isLiteral, g] of groupBy(seq, x => x[1])) {
+          if (isLiteral) {
+            ret.push([[...g].map(x => x[0]).join(''), true]);
+          } else {
+            ret.push(...g);
+          }
+        }
+        if (ret.length === 1) {
+          return ret[0];
+        }
+        return [ret.map(x => toRule(x)).join(' '), false];
+      };
+
+      while (i < length) {
+        const c = pattern[i];
+        if (c === '.') {
+          seq.push([getDot(), false]);
+          i += 1;
+        } else if (c === '(') {
+          i += 1;
+          if (i < length) {
+            if (pattern[i] === '?') {
+              throw new Error(`Unsupported pattern syntax "${pattern[i]}" at index ${i} of /${pattern}/`);
+            }
+          }
+          seq.push([`(${toRule(transform())})`, false]);
+        } else if (c === ')') {
+          i += 1;
+          if (start <= 0 || pattern[start - 1] !== '(') {
+            throw new Error(`Unbalanced parentheses; start = ${start}, i = ${i}, pattern = ${pattern}`);
+          }
+          return joinSeq();
+        } else if (c === '[') {
+          let squareBrackets = c;
+          i += 1;
+          while (i < length && pattern[i] !== ']') {
+            if (pattern[i] === '\\') {
+              squareBrackets += pattern.slice(i, i + 2);
+              i += 2;
+            } else {
+              squareBrackets += pattern[i];
+              i += 1;
+            }
+          }
+          if (i >= length) {
+            throw new Error(`Unbalanced square brackets; start = ${start}, i = ${i}, pattern = ${pattern}`);
+          }
+          squareBrackets += ']';
+          i += 1;
+          seq.push([squareBrackets, false]);
+        } else if (c === '|') {
+          seq.push(['|', false]);
+          i += 1;
+        } else if (c === '*' || c === '+' || c === '?') {
+          seq[seq.length - 1] = [toRule(seq[seq.length - 1]) + c, false];
+          i += 1;
+        } else if (c === '{') {
+          let curlyBrackets = c;
+          i += 1;
+          while (i < length && pattern[i] !== '}') {
+            curlyBrackets += pattern[i];
+            i += 1;
+          }
+          if (i >= length) {
+            throw new Error(`Unbalanced curly brackets; start = ${start}, i = ${i}, pattern = ${pattern}`);
+          }
+          curlyBrackets += '}';
+          i += 1;
+          const nums = curlyBrackets.slice(1, -1).split(',').map(s => s.trim());
+          let minTimes, maxTimes;
+          if (nums.length === 1) {
+            minTimes = parseInt(nums[0], 10);
+            maxTimes = minTimes;
+          } else {
+            if (nums.length !== 2) {
+              throw new Error(`Invalid quantifier ${curlyBrackets}`);
+            }
+            minTimes = nums[0] ? parseInt(nums[0], 10) : 0;
+            maxTimes = nums[1] ? parseInt(nums[1], 10) : Infinity;
+          }
+
+          let [sub, subIsLiteral] = seq[seq.length - 1];
+
+          if (!subIsLiteral) {
+            let id = subRuleIds[sub];
+            if (id === undefined) {
+              id = this._addRule(`${name}-${Object.keys(subRuleIds).length + 1}`, sub);
+              subRuleIds[sub] = id;
+            }
+            sub = id;
+          }
+
+          seq[seq.length - 1] = [
+            _buildRepetition(subIsLiteral ? `"${sub}"` : sub, minTimes, maxTimes, {itemRuleIsLiteral: subIsLiteral}),
+            false
+          ];
+        } else {
+          let literal = '';
+          while (i < length) {
+            if (pattern[i] === '\\' && i < length - 1) {
+              const next = pattern[i + 1];
+              if (ESCAPED_IN_REGEXPS_BUT_NOT_IN_LITERALS.has(next)) {
+                i += 1;
+                literal += pattern[i];
+                i += 1;
+              } else {
+                literal += pattern.slice(i, i + 2);
+                i += 2;
+              }
+            } else if (pattern[i] === '"') {
+              literal += '\\"';
+              i += 1;
+            } else if (!NON_LITERAL_SET.has(pattern[i]) &&
+                (i === length - 1 || literal === '' || pattern[i + 1] === '.' || !NON_LITERAL_SET.has(pattern[i+1]))) {
+              literal += pattern[i];
+              i += 1;
+            } else {
+              break;
+            }
+          }
+          if (literal !== '') {
+            seq.push([literal, true]);
+          }
+        }
+      }
+
+      return joinSeq();
+    };
+
+    return this._addRule(name, "\"\\\"\" (" + toRule(transform()) + ") \"\\\"\" space")
+  }
+
+  _notStrings(strings) {
+    class TrieNode {
+      constructor() {
+        this.children = {};
+        this.isEndOfString = false;
+      }
+
+      insert(str) {
+        let node = this;
+        for (const c of str) {
+          node = node.children[c] = node.children[c] || new TrieNode();
+        }
+        node.isEndOfString = true;
+      }
+    }
+
+    const trie = new TrieNode();
+    for (const s of strings) {
+      trie.insert(s);
+    }
+
+    const charRuleName = this._addPrimitive('char', PRIMITIVE_RULES['char']);
+    const out = ['["] ( '];
+
+    const visit = (node) => {
+      const rejects = [];
+      let first = true;
+      for (const c of Object.keys(node.children).sort()) {
+        const child = node.children[c];
+        rejects.push(c);
+        if (first) {
+          first = false;
+        } else {
+          out.push(' | ');
+        }
+        out.push(`[${c}]`);
+        if (Object.keys(child.children).length > 0) {
+          out.push(' (');
+          visit(child);
+          out.push(')');
+        } else if (child.isEndOfString) {
+          out.push(` ${charRuleName}+`);
+        }
+      }
+      if (Object.keys(node.children).length > 0) {
+        if (!first) {
+          out.push(' | ');
+        }
+        out.push(`[^"${rejects.join('')}] ${charRuleName}*`);
+      }
+    };
+
+    visit(trie);
+
+    out.push(` )${trie.isEndOfString ? '' : '?'} ["] space`);
+    return out.join('');
+  }
+
+  _resolveRef(ref) {
+    let refName = ref.split('/').pop();
+    if (!(refName in this._rules) && !this._refsBeingResolved.has(ref)) {
+      this._refsBeingResolved.add(ref);
+      const resolved = this._refs[ref];
+      refName = this.visit(resolved, refName);
+      this._refsBeingResolved.delete(ref);
+    }
+    return refName;
+  }
+
+  _generateConstantRule(value) {
+    return this._formatLiteral(JSON.stringify(value));
+  }
+
+  visit(schema, name) {
+    const schemaType = schema.type;
+    const schemaFormat = schema.format;
+    const ruleName = name in RESERVED_NAMES ? name + '-' : name == '' ? 'root' : name;
+
+    const ref = schema.$ref;
+    if (ref !== undefined) {
+      return this._addRule(ruleName, this._resolveRef(ref));
+    } else if (schema.oneOf || schema.anyOf) {
+      return this._addRule(ruleName, this._generateUnionRule(name, schema.oneOf || schema.anyOf));
+    } else if (Array.isArray(schemaType)) {
+      return this._addRule(ruleName, this._generateUnionRule(name, schemaType.map(t => ({...schema, type: t}))));
+    } else if ('const' in schema) {
+      return this._addRule(ruleName, this._generateConstantRule(schema.const) + ' space');
+    } else if ('enum' in schema) {
+      const rule = '(' + schema.enum.map(v => this._generateConstantRule(v)).join(' | ') + ') space';
+      return this._addRule(ruleName, rule);
+    } else if ((schemaType === undefined || schemaType === 'object') &&
+               ('properties' in schema ||
+                ('additionalProperties' in schema && schema.additionalProperties !== true))) {
+      const required = new Set(schema.required || []);
+      const properties = Object.entries(schema.properties ?? {});
+      return this._addRule(ruleName, this._buildObjectRule(properties, required, name, schema.additionalProperties));
+    } else if ((schemaType === undefined || schemaType === 'object') && 'allOf' in schema) {
+      const required = new Set();
+      const properties = [];
+      const addComponent = (compSchema, isRequired) => {
+        const ref = compSchema.$ref;
+        if (ref !== undefined) {
+          compSchema = this._refs[ref];
+        }
+
+        if ('properties' in compSchema) {
+          for (const [propName, propSchema] of Object.entries(compSchema.properties)) {
+            properties.push([propName, propSchema]);
+            if (isRequired) {
+              required.add(propName);
+            }
+          }
+        }
+      };
+
+      for (const t of schema.allOf) {
+        if ('anyOf' in t) {
+          for (const tt of t.anyOf) {
+            addComponent(tt, false);
+          }
+        } else {
+          addComponent(t, true);
+        }
+      }
+
+      return this._addRule(ruleName, this._buildObjectRule(properties, required, name, null));
+    } else if ((schemaType === undefined || schemaType === 'array') && ('items' in schema || 'prefixItems' in schema)) {
+      const items = schema.items ?? schema.prefixItems;
+      if (Array.isArray(items)) {
+        return this._addRule(
+          ruleName,
+          '"[" space ' +
+            items.map((item, i) => this.visit(item, `${name ?? ''}${name ? '-' : ''}tuple-${i}`)).join(' "," space ') +
+            ' "]" space'
+        );
+      } else {
+        const itemRuleName = this.visit(items, `${name ?? ''}${name ? '-' : ''}item`);
+        const minItems = schema.minItems || 0;
+        const maxItems = schema.maxItems;
+        return this._addRule(ruleName, '"[" space ' + _buildRepetition(itemRuleName, minItems, maxItems, {separatorRule: '"," space'}) + ' "]" space');
+      }
+    } else if ((schemaType === undefined || schemaType === 'string') && 'pattern' in schema) {
+      return this._visitPattern(schema.pattern, ruleName);
+    } else if ((schemaType === undefined || schemaType === 'string') && /^uuid[1-5]?$/.test(schema.format || '')) {
+      return this._addPrimitive(
+        ruleName === 'root' ? 'root' : schemaFormat,
+        PRIMITIVE_RULES['uuid']
+      );
+    } else if ((schemaType === undefined || schemaType === 'string') && `${schema.format}-string` in STRING_FORMAT_RULES) {
+      const primName = `${schema.format}-string`
+      return this._addRule(ruleName, this._addPrimitive(primName, STRING_FORMAT_RULES[primName]));
+    } else if (schemaType === 'string' && ('minLength' in schema || 'maxLength' in schema)) {
+      const charRuleName = this._addPrimitive('char', PRIMITIVE_RULES['char']);
+      const minLen = schema.minLength || 0;
+      const maxLen = schema.maxLength;
+      return this._addRule(ruleName, '"\\\"" ' + _buildRepetition(charRuleName, minLen, maxLen) + ' "\\\"" space');
+    } else if (schemaType === 'integer' && ('minimum' in schema || 'exclusiveMinimum' in schema || 'maximum' in schema || 'exclusiveMaximum' in schema)) {
+      let minValue = null;
+      let maxValue = null;
+      if ('minimum' in schema) {
+        minValue = schema.minimum;
+      } else if ('exclusiveMinimum' in schema) {
+        minValue = schema.exclusiveMinimum + 1;
+      }
+      if ('maximum' in schema) {
+        maxValue = schema.maximum;
+      } else if ('exclusiveMaximum' in schema) {
+        maxValue = schema.exclusiveMaximum - 1;
+      }
+
+      const out = ["("];
+      _generateMinMaxInt(minValue, maxValue, out);
+      out.push(") space");
+      return this._addRule(ruleName, out.join(''));
+    } else if ((schemaType === 'object') || (Object.keys(schema).length === 0)) {
+      return this._addRule(ruleName, this._addPrimitive('object', PRIMITIVE_RULES['object']));
+    } else {
+      if (!(schemaType in PRIMITIVE_RULES)) {
+        throw new Error(`Unrecognized schema: ${JSON.stringify(schema)}`);
+      }
+      // TODO: support minimum, maximum, exclusiveMinimum, exclusiveMaximum at least for zero
+      return this._addPrimitive(ruleName === 'root' ? 'root' : schemaType, PRIMITIVE_RULES[schemaType]);
+    }
+  }
+
+  _addPrimitive(name, rule) {
+    let n = this._addRule(name, rule.content);
+    for (const dep of rule.deps) {
+      const depRule = PRIMITIVE_RULES[dep] || STRING_FORMAT_RULES[dep];
+      if (!depRule) {
+        throw new Error(`Rule ${dep} not known`);
+      }
+      if (!(dep in this._rules)) {
+        this._addPrimitive(dep, depRule);
+      }
+    }
+    return n;
+  }
+
+  _buildObjectRule(properties, required, name, additionalProperties) {
+    const propOrder = this._propOrder;
+    // sort by position in prop_order (if specified) then by original order
+    const sortedProps = properties.map(([k]) => k).sort((a, b) => {
+      const orderA = propOrder[a] || Infinity;
+      const orderB = propOrder[b] || Infinity;
+      return orderA - orderB || properties.findIndex(([k]) => k === a) - properties.findIndex(([k]) => k === b);
+    });
+
+    const propKvRuleNames = {};
+    for (const [propName, propSchema] of properties) {
+      const propRuleName = this.visit(propSchema, `${name ?? ''}${name ? '-' : ''}${propName}`);
+      propKvRuleNames[propName] = this._addRule(
+        `${name ?? ''}${name ? '-' : ''}${propName}-kv`,
+        `${this._formatLiteral(JSON.stringify(propName))} space ":" space ${propRuleName}`
+      );
+    }
+    const requiredProps = sortedProps.filter(k => required.has(k));
+    const optionalProps = sortedProps.filter(k => !required.has(k));
+
+    if (additionalProperties) {
+      const subName = `${name ?? ''}${name ? '-' : ''}additional`;
+      const valueRule =
+        additionalProperties != null && typeof additionalProperties === 'object' ? this.visit(additionalProperties, `${subName}-value`)
+        : this._addPrimitive('value', PRIMITIVE_RULES['value']);
+
+      const key_rule =
+        sortedProps.length === 0 ? this._addPrimitive('string', PRIMITIVE_RULES['string'])
+        : this._addRule(`${subName}-k`, this._notStrings(sortedProps));
+
+      propKvRuleNames['*'] = this._addRule(
+        `${subName}-kv`,
+        `${key_rule} ":" space ${valueRule}`);
+      optionalProps.push('*');
+    }
+
+    let rule = '"{" space ';
+    rule += requiredProps.map(k => propKvRuleNames[k]).join(' "," space ');
+
+    if (optionalProps.length > 0) {
+      rule += ' (';
+      if (requiredProps.length > 0) {
+        rule += ' "," space ( ';
+      }
+
+      const getRecursiveRefs = (ks, firstIsOptional) => {
+        const [k, ...rest] = ks;
+        const kvRuleName = propKvRuleNames[k];
+        let res;
+        const commaRef = `( "," space ${kvRuleName} )`;
+        if (firstIsOptional) {
+          res = commaRef + (k === '*' ? '*' : '?');
+        } else {
+          res = kvRuleName + (k === '*' ? ' ' + commaRef + '*' : '');
+        }
+        if (rest.length > 0) {
+          res += ' ' + this._addRule(
+            `${name ?? ''}${name ? '-' : ''}${k}-rest`,
+            getRecursiveRefs(rest, true)
+          );
+        }
+        return res;
+      };
+
+      rule += optionalProps.map((_, i) => getRecursiveRefs(optionalProps.slice(i), false)).join(' | ');
+      if (requiredProps.length > 0) {
+        rule += ' )';
+      }
+      rule += ' )?';
+    }
+
+    rule += ' "}" space';
+
+    return rule;
+  }
+
+  formatGrammar() {
+    let grammar = '';
+    for (const [name, rule] of Object.entries(this._rules).sort(([a], [b]) => a.localeCompare(b))) {
+      grammar += `${name} ::= ${rule}\n`;
+    }
+    return grammar;
+  }
+}
+
+// Helper function to group elements by a key function
+function* groupBy(iterable, keyFn) {
+  let lastKey = null;
+  let group = [];
+  for (const element of iterable) {
+    const key = keyFn(element);
+    if (lastKey !== null && key !== lastKey) {
+      yield [lastKey, group];
+      group = [];
+    }
+    group.push(element);
+    lastKey = key;
+  }
+  if (group.length > 0) {
+    yield [lastKey, group];
+  }
+}

tools/server/public_legacy/loading.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta http-equiv="refresh" content="5">
+    </head>
+    <body>
+        <div id="loading">
+            The model is loading. Please wait.<br/>
+            The user interface will appear soon.
+        </div>
+    </body>
+</html>

tools/server/public_legacy/prompt-formats.js

@@ -0,0 +1,331 @@
+// extended list
+export const promptFormats = {
+  "alpaca": {
+  template: `{{prompt}}\n\n{{history}}\n\n{{char}}:`,
+
+  historyTemplate: `### {{name}}:\n{{message}}`,
+
+  char: "Response",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "Instruction",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "chatml": {
+  template: `<|im_start|>system\n{{prompt}}<|im_end|>\n{{history}}{{char}}`,
+
+  historyTemplate: `<|im_start|>{{name}}\n{{message}}`,
+
+  char: "assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "user",
+  userMsgPrefix: "",
+  userMsgSuffix: "<|im_end|>\n",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "commandr": {
+  template: `<BOS_TOKEN><|START_OF_TURN_TOKEN|><|SYSTEM_TOKEN|>{{prompt}}\n<|END_OF_TURN_TOKEN|>{{history}}{{char}}`,
+
+  historyTemplate: `<|START_OF_TURN_TOKEN|><|{{name}}|> {{message}}`,
+
+  char: "CHATBOT_TOKEN",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "USER_TOKEN",
+  userMsgPrefix: "",
+  userMsgSuffix: "<|END_OF_TURN_TOKEN|>",
+
+  stops: ""
+  },
+  // ref: https://docs.cohere.com/docs/prompting-command-r
+
+  // ----------------------------
+
+  "llama2": {
+  template: `<s>[INST] <<SYS>>\n{{prompt}}\n<</SYS>>\n\nTest Message [/INST] Test Successfull </s>{{history}}{{char}}`,
+
+  historyTemplate: `{{name}}: {{message}}`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "</s>",
+
+  user: "User",
+  userMsgPrefix: "<s>[INST] ",
+  userMsgSuffix: " [/INST]",
+
+  stops: ""
+  },
+  // ref: https://huggingface.co/blog/llama2#how-to-prompt-llama-2
+
+  // ----------------------------
+
+  "llama3": {
+  template: `<|begin_of_text|><|start_header_id|>system<|end_header_id|>\n\n{{prompt}}{{history}}{{char}}`,
+
+  historyTemplate: `<|start_header_id|>{{name}}<|end_header_id|>\n\n{{message}}<|eot_id|>`,
+
+  char: "assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "user",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: "<|eot_id|>"
+  },
+  // ref: https://llama.meta.com/docs/model-cards-and-prompt-formats/meta-llama-3/#special-tokens-used-with-meta-llama-3
+
+  // ----------------------------
+
+  "openchat": {
+  template: `{{history}}{{char}}`,
+
+  historyTemplate: `GPT4 Correct {{name}}: {{message}}<|end_of_turn|>`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "User",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "phi3": {
+  template: `{{history}}{{char}}`,
+
+  historyTemplate: `<|{{name}}|>\n{{message}}<|end|>\n`,
+
+  char: "assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "user",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: "<|end|>"
+  },
+  // ref: https://huggingface.co/microsoft/Phi-3-mini-4k-instruct#chat-format
+
+  // ----------------------------
+
+  "vicuna": {
+  template: `{{prompt}}\n{{history}}{{char}}`,
+
+  historyTemplate: `{{name}}: {{message}}\n`,
+
+  char: "ASSISTANT",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "USER",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+  // ref: https://huggingface.co/lmsys/vicuna-33b-v1.3/discussions/1
+
+  // ----------------------------
+
+  "deepseekCoder": {
+  template: `{{prompt}}{{history}}{{char}}:`,
+
+  historyTemplate: `### {{name}}:\n{{message}}`,
+
+  char: "Response",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "Instruction",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: "<|EOT|>"
+  },
+
+  // ----------------------------
+
+  "med42": {
+  template: `<|system|>: {{prompt}}\n{{history}}{{char}}`,
+
+  historyTemplate: `<|{{name}}|>: {{message}}\n`,
+
+  char: "assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "prompter",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "neuralchat": {
+  template: `### System:\n{{prompt}}\n{{history}}{{char}}:`,
+
+  historyTemplate: `### {{name}}:\n{{message}}\n`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "User",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "nousHermes": {
+  template: `### Instruction: {{prompt}}\n\n{{history}}\n\n{{char}}:`,
+
+  historyTemplate: `### {{name}}:\n{{message}}`,
+
+  char: "Response",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "Input",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "openchatMath": {
+  template: `{{history}}{{char}}`,
+
+  historyTemplate: `Math Correct {{name}}: {{message}}<|end_of_turn|>`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+
+  user: "User",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "orion": {
+  template: `<s>Human: Test Message\n\nAssistant: </s>Test Successful</s>{{history}}{{char}}:`,
+
+  historyTemplate: `{{name}}: {{message}}`,
+
+  char: "Assistant </s>",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "Human",
+  userMsgPrefix: "",
+  userMsgSuffix: "\n\n",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "sauerkraut": {
+  template: `{{prompt}}\n{{history}}{{char}}`,
+
+  historyTemplate: `
+  {{name}}: {{message}}\n`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "User",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "starlingCode": {
+  template: `{{history}}{{char}}`,
+
+  historyTemplate: `Code {{name}}: {{message}}<|end_of_turn|>`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "User",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "yi34b": {
+  template: `{{history}} {{char}}`,
+
+  historyTemplate: `{{name}}: {{message}}`,
+
+  char: "Assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "Human",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  },
+
+  // ----------------------------
+
+  "zephyr": {
+  template: `<|system|>\n{{prompt}}</s>\n{{history}}{{char}}`,
+
+  historyTemplate: `<|{{name}}|>\n{{message}}</s>\n`,
+
+  char: "assistant",
+  charMsgPrefix: "",
+  charMsgSuffix: "",
+
+  user: "user",
+  userMsgPrefix: "",
+  userMsgSuffix: "",
+
+  stops: ""
+  }
+  };

tools/server/public_legacy/style.css

@@ -0,0 +1,954 @@
+@import url("colorthemes.css");
+
+body {
+  font-family: 'Arial', sans-serif;
+  font-size: 90%;
+  background-color: var(--background-color-1);
+  color: var(--text-color-subtile-1); /* head 1 llama.cpp & triangle options for some reason */
+  max-width: 600px;
+  min-width: 300px;
+  line-height: 1.2;
+  margin: 0 auto;
+  padding: 0 0.5em;
+  transition: background-color 0.3s;
+}
+
+::selection {
+  color: var(--button-primary-text) ;
+  background: var(--button-primary-color);
+}
+
+code, pre code {
+  font-family: 'Courier New', monospace;
+}
+
+#container {
+  margin: 0em auto;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+  height: 100%;
+}
+
+main {
+  margin: 3px;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+  gap: 1em;
+  flex-grow: 1;
+  overflow-y: auto;
+  border: 1px solid var(--border-color-3);
+  border-radius: 5px;
+  padding: 0.5em;
+}
+
+p {
+  overflow-wrap: break-word;
+  word-wrap: break-word;
+  hyphens: auto;
+  margin-top: 0.5em;
+  margin-bottom: 0.5em;
+}
+
+#write form {
+  margin: 1em 0 0 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.5em;
+  align-items: stretch;
+}
+
+.right {
+  display: flex;
+  flex-direction: row;
+  gap: 0.5em;
+  justify-content: flex-end;
+  margin-bottom: 30px;
+}
+
+.two-columns {
+  width: 97%;
+  max-width: 97%;
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 1em;
+  position: relative;
+}
+
+.json-schema-controls {
+  margin-top: 10px;
+  width: 100%;
+  max-width: 100%;
+  display: grid;
+  grid-template: "a a";
+  gap: 1em;
+  font-size: x-small;
+  color: var(--theme-nuance-color-3);
+  padding-top: 16px;
+  padding-bottom: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+}
+
+.json-schema-controls > * {
+  flex: 1;
+}
+
+/* titles of the details-summary boxes */
+.summary-title {
+  font-weight: 600;
+  font-size: x-small;
+  color: var(--text-color-subtile-1);
+  text-transform: uppercase;
+  /* transition: ; */
+}
+
+fieldset {
+  border: none;
+  padding: 0;
+  margin: 0;
+  color: var(--text-color-plain);
+}
+
+fieldset.two {
+  display: grid;
+  grid-template: "a a a";
+  gap: 1em;
+  align-items: center;
+  font-size: x-small;
+  color: var(--text-color-plain);
+}
+
+fieldset.three {
+  display: grid;
+  grid-template: "a a a";
+  gap: 1em;
+  font-size: x-small;
+  color: var(--text-color-plain);
+}
+
+/* titles of name fields*/
+fieldset.names {
+  display: grid;
+  grid-template: "a a";
+  gap: 1em;
+  font-size: x-small;
+  color: var(--theme-nuance-color-3);
+  padding-top: 16px;
+  padding-bottom: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+}
+
+/* titles of params fields*/
+fieldset.params {
+  display: grid;
+  grid-template: "a a";
+  gap: 1em;
+  font-size: x-small;
+  color: var(--theme-nuance-color-4);
+  padding-top: 16px;
+  padding-bottom: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+}
+
+fieldset.dropdowns {
+  -webkit-appearance: none;
+  display: flex;
+  grid-template: "a a";
+  gap: 1em;
+  font-size: x-small;
+  color: red;
+  padding-top: 16px;
+  padding-bottom: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+}
+
+/* input of name fields*/
+.names input[type="text"] {
+  font-family: Arial, sans-serif;
+  font-size: medium;
+  font-weight: 500;
+  padding: 5px;
+  border: 1px solid var(--border-color-2);
+}
+
+.chat-id-color {
+  color: var(--chat-id-color);
+}
+
+details {
+  border: 1px solid var(--border-color-2);
+  border-radius: 5px;
+  padding: 0.5em 0.5em 0;
+  margin-top: 0.5em;
+}
+
+summary {
+  font-weight: bold;
+  margin: -0.5em -0.5em 0;
+  padding: 0.5em;
+  cursor: pointer;
+}
+
+details[open] {
+  padding: 0.5em;
+}
+
+textarea-sec, input-sec, button-sec {
+  padding: 10px;
+  height: 40px;
+  align-items: center;
+}
+
+textarea-sec::placeholder, input-sec::placeholder {
+  padding-left: 10px;
+}
+
+.toggleCheckbox {
+  display: none;
+}
+
+.toggleContainer {
+  position: relative;
+  display: grid;
+  grid-template-columns: repeat(2, 1fr);
+  width: fit-content;
+  border: 3px solid var(--border-color-2);
+  border-radius: 20px;
+  background: var(--border-color-2);
+  font-size: small;
+  cursor: pointer;
+  overflow: hidden;
+}
+
+/* toggle button current state */
+.toggleContainer::before {
+  color: var(--button-primary-text);
+  background-color: var(--button-primary-color);
+  content: '';
+  position: absolute;
+  width: 50%;
+  height: 100%;
+  left: 0%;
+  border-radius: 20px;
+  transition: all 0.3s;
+}
+
+.toggleContainer div {
+  padding: 6px;
+  text-align: center;
+  z-index: 1;
+  transition: color 0.3s;
+}
+
+.toggleCheckbox:checked + .toggleContainer::before {
+  left: 50%;
+}
+
+.toggleCheckbox:checked + .toggleContainer div:first-child {
+  color: var(--text-color-subtile-2);
+}
+
+.toggleCheckbox:checked + .toggleContainer div:last-child {
+  color: var(--button-primary-text);
+}
+
+.toggleCheckbox + .toggleContainer div:first-child {
+  color: var(--button-primary-text);
+}
+
+.toggleCheckbox + .toggleContainer div:last-child {
+  color: var(--text-color-subtile-2);
+}
+
+select {
+  padding: 5px;
+  margin-right: 5px;
+  border-radius: 4px;
+  border: 1px solid var(--secondary-color-4);
+  background-color: var(--primary-color-3);
+  color: var(--secondary-color-4);
+  cursor: pointer;
+}
+
+select:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 1px var(--border-focus-shadow);
+}
+
+.button-container {
+  display: flex;
+  justify-content: flex-end;
+}
+
+button {
+  color: var(--button-primary-text);
+  background-color: var(--button-primary-color);
+  border: 1px solid var(--button-primary-border);
+  transition: background-color 0.1s;
+  border-radius: 12px;
+  font-size: x-small;
+  font-weight: 600;
+  text-shadow: 0px 0px 30px #ffffff;
+  text-align: center;
+  text-decoration: none;
+  margin: 4px 2px;
+  padding: 10px 20px;
+  display: inline-block;
+  cursor: pointer;
+}
+
+button:hover {
+  color: var(--button-primary-text-hover);
+  background-color: var(--button-primary-color-hover);
+  border: 1px solid var(--button-primary-border-hover);
+  font-size: x-small;
+  font-weight: 600;
+}
+
+button:active {
+  color: var(--button-primary-text-active);
+  background-color: var(--button-primary-color-active);
+  border: 1px solid var(--button-primary-border-active);
+  font-size: x-small;
+  font-weight: 600;
+}
+
+button:disabled {
+  color: var(--button-tertiary-text);
+  background-color: var(--button-tertiary-color);
+  border: 1px solid var(--button-tertiary-border);
+  font-size: x-small;
+  font-weight: 600;
+  cursor: not-allowed;
+}
+
+.reset-button {
+  background-color: var(--button-secondary-color);
+  border: 1px solid var(--button-secondary-color);
+  color: var(--button-secondary-text);
+  width: fit-content;
+  height: fit-content;
+  font-size: x-small;
+  font-weight: 600;
+  border-radius: 50px;
+  overflow: hidden;
+}
+
+.reset-button:hover {
+  color: var(--button-alert-text-hover);
+  background-color: var(--button-alert-color-hover);
+  border: 1px solid var(--button-alert-border-hover);
+  font-size: x-small;
+  font-weight: 600;
+}
+
+.reset-button:active {
+  color: var(--button-alert-text-active);
+  background-color: var(--button-alert-color-active);
+  border: 1px solid var(--button-alert-border-active);
+  font-size: x-small;
+  font-weight: 600;
+}
+
+.button-grammar {
+  color: var(--button-primary-text);
+  background-color: var(--button-primary-color);
+  border: 1px solid var(--button-primary-border);
+  border-radius: 10px;
+  padding: 10px 20px;
+  text-align: center;
+  text-decoration: none;
+  display: inline-block;
+  font-size: x-small;
+  font-weight: 600;
+  margin: 2px 2px;
+  transition: background-color 0.1s;
+  cursor: pointer;
+}
+
+.button-grammar:hover {
+  color: var(--button-primary-text-hover);
+  background-color: var(--button-primary-color-hover);
+  border: 1px solid var(--button-primary-border-hover);
+  border-radius: 10px;
+  padding: 10px 20px;
+  text-align: center;
+  text-decoration: none;
+  display: inline-block;
+  font-size: x-small;
+  font-weight: 600;
+  margin: 2px 2px;
+  transition: background-color 0.1s;
+  cursor: pointer;
+}
+
+.button-grammar:active {
+  color: var(--button-primary-text-active);
+  background-color: var(--button-primary-color-active);
+  border: 1px solid var(--button-primary-border-active);
+  font-size: x-small;
+  font-weight: 600;
+}
+
+.button-back {
+  background-color: var(--button-secondary-color);
+  border: 1px solid var(--button-secondary-color);
+  color: var(--button-secondary-text);
+  transition: background-color 0.1s;
+  border-radius: 12px;
+  font-size: x-small;
+  font-weight: 600;
+  text-align: center;
+  text-decoration: none;
+  margin: 4px 2px;
+  padding: 10px 20px;
+  display: inline-block;
+  cursor: pointer;
+}
+
+.button-back:hover {
+  color: var(--button-secondary-text-hover);
+  background-color: var(--button-secondary-color-hover);
+  border: 1px solid var(--button-secondary-border-hover);
+  padding: 10px 20px;
+  text-align: center;
+  text-decoration: none;
+  display: inline-block;
+  font-size: x-small;
+  font-weight: 600;
+  margin: 4px 2px;
+  transition: background-color 0.1s;
+  cursor: pointer;
+  border-radius: 12px;
+}
+
+.button-back:active {
+  color: var(--button-secondary-text-active);
+  background-color: var(--button-secondary-color-active);
+  border: 1px solid var(--button-secondary-border-active);
+  font-size: x-small;
+  font-weight: 600;
+}
+
+.prob-set {
+  padding: 0.3em;
+  border-bottom: 1px solid red; /* unknown */
+}
+
+.popover-content {
+  position: absolute;
+  background-color: white;
+  padding: 0.2em;
+  box-shadow: 0 0 13px rgba(0, 0, 0, 0.1);
+}
+
+.grammar {
+  width: 97%;
+  max-width: 97%;
+}
+
+textarea {
+  padding: 5px;
+  flex-grow: 1;
+  width: 100%;
+  max-width: 100%;
+  border-radius: 8px;
+  border: 1px solid var(--border-color-1);
+  resize: none;
+  height: 6em;
+}
+
+textarea:focus {
+  outline: none;
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+/* "props" frame */
+input[type="text"],
+input[type="range"] {
+  padding: 5px;
+  border-radius: 8px;
+  border: 1px solid var(--border-color-1);
+}
+
+/* "names and props" frame focused*/
+input[type="text"]:focus {
+  outline: none;
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+input[type="range"]:hover {
+  opacity: 1;
+}
+
+input[type="range"]:focus {
+  outline: none;
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+  background-size: var(--slider-track-size-focus);
+}
+
+input[type="range"]::-moz-range-thumb {
+  width: 6px;
+  height: 25px;
+  border: 1px solid var(--ui-range-thumb-border);
+  border-radius: 5px;
+  background-color: var(--ui-range-thumb-color);
+  cursor: pointer;
+}
+
+input[type="range"] {
+  -webkit-appearance: none;
+  width: 80%;
+  height: 1px;
+  border: 1px solid var(--border-color-1);
+  border-radius: 8px;
+  background: var(--border-color-2);
+  outline: none;
+  opacity: 0.7;
+  -webkit-transition: .2s;
+  transition: opacity .2s;
+}
+
+input[type="range"]::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 6px;
+  height: 25px;
+  border: 1px solid var(--ui-range-thumb-border);
+  border-radius: 5px;
+  background-color: var(--ui-range-thumb-color);
+  cursor: pointer;
+}
+
+input[type="range"]::-webkit-slider-runnable-track {
+  background-size: var(--slider-track-size);
+}
+
+input[type="radio"] {
+  accent-color:   var(--theme-nuance-color-2);
+}
+
+.chat-input-container {
+  position: relative;
+  max-width: 97%;
+  min-width: 97%;
+}
+
+.chat-input-label {
+  position: absolute;
+  top: 0;
+  left: 0;
+  color: var(--text-color-plain);
+  pointer-events: none;
+  margin-left: 5px;
+  margin-top: 5px;
+}
+
+textarea#chat-input {
+  padding-top: 10px;
+  padding-left: 10px;
+  font-size: medium;
+  border: 1px solid var(--border-color-2);
+  resize: vertical;
+}
+
+textarea#chat-input:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+.input-container {
+  position: relative;
+  box-sizing: border-box;
+  width: 100%; /* Setzt die Breite auf 100% */
+  max-width: 100%; /* Stellt sicher, dass die Breite nicht größer als 100% wird */
+}
+
+.input-container:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+/* titles of name fields*/
+/* fieldset.names {
+  display: grid;
+  grid-template: "a a";
+  gap: 1em;
+  font-size: x-small;
+  color: var(--theme-nuance-color-3);
+  padding-top: 16px;
+  padding-bottom: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+} */
+
+/* input of name fields*/
+/* .names input[type="text"] {
+  font-family: Arial, sans-serif;
+  font-size: medium;
+  font-weight: 500;
+  padding: 5px;
+  border: 1px solid var(--border-color-2);
+} */
+
+fieldset.apiKey {
+  width: 100%;
+  font-size: x-small;
+  color: var(--theme-nuance-color-3);
+  padding-top: 16px;
+  padding-bottom: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+}
+
+.apiKey {
+  font-family: Arial, sans-serif;
+  font-weight: 500;
+  padding: 5px;
+  border: 1px solid var(--border-color-2);
+}
+
+.apiKey:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+.apiKey input[type="text"] {
+  font-family: Arial, sans-serif;
+  font-size: medium;
+  font-weight: 500;
+  padding: 5px;
+  border: 1px solid var(--border-color-2);
+}
+
+.apiKey label {
+  display: inline-block;
+  width: auto;
+  margin-right: 5px;
+}
+
+textarea#api_key {
+  padding-top: 10px;
+  padding-left: 10px;
+  font-size: medium;
+  border: 1px solid var(--border-color-2);
+  resize: vertical;
+}
+
+textarea#api_key:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+/* embedded title of the system prompt text area */
+.input-label {
+  position: absolute;
+  top: 0;
+  left: 0;
+  color: var(--theme-nuance-color-4);
+  pointer-events: none;
+  border-radius: 8px 8px 0px 0px;
+  padding-top: 10px;
+  padding-left: 13px;
+  padding-right: 0px;
+  margin-top: 1px;
+  margin-left: 1px;
+  margin-right: 20px;
+  text-transform: uppercase;
+  font-weight: 600;
+  font-size: small;
+  background: rgba(255, 255, 255, 0.5);
+  backdrop-filter: blur(10px);
+  -webkit-backdrop-filter: blur(10px); /* for safari */
+  width: 97%;
+  /* display: block;
+  box-sizing: border-box; */
+}
+
+/* embedded title of the prompt style areas */
+.input-label-sec {
+  position: absolute;
+  top: 0;
+  left: 0;
+  color: var(--theme-nuance-color-4);
+  pointer-events: none;
+  margin-left: 13px;
+  margin-top: 16px;
+  text-transform: uppercase;
+  font-weight: 600;
+  font-size: x-small;
+}
+
+/* system prompt input area */
+textarea.persistent-input {
+  padding-top: 42px;
+  padding-left: 11px;
+  width: 97%;
+  max-width: 97%;
+  height: 50px;
+  font-size: medium;
+  overscroll-behavior: contain;
+}
+
+/* system prompt box */
+.persistent-input {
+  height: auto;
+  width: 100%;
+  max-width: 100%;
+  min-height: 50px;
+  padding: 3px;
+  transition: min-height 0.3s ease;
+}
+
+/* chat history box */
+.persistent-input:focus {
+  height: auto;
+  min-height: 150px;
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+textarea.persistent-input:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+/* prompt style input area */
+textarea.persistent-input-sec {
+  width: 97%;
+  max-width: 97%;
+  padding-top: 42px;
+  padding-left: 11px;
+  font-size: small;
+  border: 1px solid var(--border-color-1);
+  overscroll-behavior: contain;
+}
+
+textarea.persistent-input-sec:focus {
+  border: 1px solid var(--border-focus-color);
+  box-shadow: 0 0 3px var(--border-focus-shadow);
+}
+
+/* chat history box */
+.persistent-input-sec {
+  height: auto;
+  min-height: 150px;
+}
+
+img {
+  border-radius: 8px;
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+  width: 50%;
+}
+
+/* code area background */
+pre code {
+  display: block;
+  background-color: var(--code-background-color);
+  color: var(--code-text-color);
+  padding: 0.2em 0.2em;
+  border-radius: 5px;
+}
+
+/* code area text */
+code {
+  font-family: monospace;
+  font-weight: bold;
+  padding: 0.1em 0.3em;
+  border-radius: 5px;
+}
+
+fieldset label {
+  margin: 0.5em 0;
+  display: block;
+}
+
+fieldset label.slim {
+  margin: 0 0.5em;
+  display: inline;
+}
+
+header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  text-align: center;
+  padding-left: 15px;
+}
+
+.generation-statistics:hover {
+  color: var(--theme-nuance-color-4);
+  cursor: default;
+}
+
+footer {
+  font-size: 80%;
+  color: var(--background-color-3);
+  text-align: center;
+  cursor: default;
+}
+
+footer a {
+  color: var(--background-color-4); /* Color of the link */
+  text-decoration: none; /* No underlining */
+  font-weight: bold; /* Bold print */
+}
+
+footer a:hover {
+  color: var(--theme-nuance-color-4); /* Color of the link when hovering */
+  text-decoration: underline; /* Underlining when hovering */
+}
+
+.mode-chat textarea[name=prompt] {
+  height: 8.5em;
+  border: 1px solid var(--primary-color-3);
+}
+
+.mode-completion textarea[name=prompt] {
+  height: 30em;
+  border: 1px solid var(--primary-color-3);
+}
+
+@keyframes loading-bg-wipe {
+  0% {
+    background-position: 0%;
+  }
+  100% {
+    background-position: 100%;
+  }
+}
+
+.loading {
+  background-size: 50% 100%;
+  background-image: linear-gradient(90deg, var(--loading-color-1), var(--loading-color-2), var(--loading-color-1));
+  animation: loading-bg-wipe 2s linear infinite;
+}
+
+.dropbtn {
+  color: var(--button-primary-color);
+  background-color: var(--background-color-1);
+  border: 1px solid var(--background-color-1);
+  transition: background-color 0.1s;
+  border-radius: 4px 4px 0px 0px;
+  font-size: x-small;
+  font-weight: 600;
+  text-shadow: 0px 0px 2px #99999990;
+  text-align: center;
+  text-decoration: none;
+  margin: 4px 2px;
+  padding: 5px 20px;
+  display: inline-block;
+  cursor: pointer;
+  top: 0;
+}
+
+.dropbtn svg {
+  vertical-align: middle;
+  margin-right: 0px;
+  stroke: var(--button-primary-color);
+}
+
+.dropbtn:hover svg {
+  vertical-align: middle;
+  margin-right: 0px;
+  stroke: var(--button-primary-text);
+}
+
+.dropbtn:focus {
+  outline: none; /* Removes the blue border that appears when the button is focused */
+}
+
+.dropdown {
+  position: relative;
+  display: inline-block;
+}
+
+.dropdown-content {
+  /* display: none; */
+  position: absolute;
+  right: 0;
+  text-align: end;
+  color: var(--button-secondary-color);
+  background-color: var(--text-color-subtile-2);
+  border-radius: 4px 4px 4px 4px;
+  min-width: 160px;
+  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
+  z-index: 1;
+  /* Verstecke den Inhalt sofort */
+  opacity: 0;
+  visibility: hidden;
+  /* übergangsverzögerung für das Verschwinden */
+  transition: visibility 0.4s linear 0s, opacity 0.2s ease-in-out;
+  transition-delay: 0.2s;
+}
+
+#dropdown-content {transition-timing-function: ease;}
+
+.dropdown-content:hover {
+  background-color: var(--text-color-subtile-2);
+}
+
+.dropdown-content a {
+  color: var(--border-color-2);
+  padding: 12px 16px;
+  border-radius: 4px 4px 4px 4px;
+  text-decoration: none;
+  display: block;
+  background-color: var(--text-color-subtile-2);
+}
+
+.dropdown-content a:hover {
+  color: var(--border-color-2);
+  background-color: var(--text-color-subtile-1);
+  font-weight: 600;
+}
+
+.dropdown:hover .dropdown-content {
+  /* display: block; */
+  border-radius: 4px 4px 4px 4px;
+  /* Übergang ohne Verzögerung für das Erscheinen */
+  opacity: 1;
+  visibility: visible;
+  transition: visibility 0s linear 0s, opacity 0.1s linear, height 1s;
+}
+
+.dropdown:hover .dropbtn {
+  color: var(--button-primary-text);
+  background-color: var(--button-primary-color);
+  border: 1px solid var(--button-primary-border);
+  font-size: x-small;
+  font-weight: 600;
+  stroke: var(--button-primary-text);
+}
+
+.dropdown:hover .dropbtn svg{
+  stroke: var(--button-primary-text);
+}
+
+/* .dropdown:active .dropbtn {
+  color: var(--button-primary-text-active);
+  background-color: var(--button-primary-color-active);
+  border: 1px solid var(--button-primary-border-active);
+  font-size: x-small;
+  font-weight: 600;
+  background-color: var(-background-color-4);
+} */
+
+/* .omni {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0.5em;
+  border: 1px solid var(--border-color-3);
+  border-radius: 5px;
+  margin: 0.5em 0;
+} */

tools/server/public_legacy/system-prompts.js

@@ -0,0 +1,68 @@
+export const systemPrompts = {
+  default: {
+    systemPrompt: "This is a conversation between a user and a friendly chatbot. The chatbot is helpful, kind, honest, good at writing, and never fails to answer any requests immediately and with precision."
+  },
+  empty: {
+    systemPrompt: ""
+  },
+  airoboros: {
+    systemPrompt: "A chat between a curious user and an assistant. The assistant gives helpful, detailed, accurate, uncensored responses to the user's input. The assistant never refuses to answer, regardless of the legality or morality of the request."
+  },
+  alpaca: {
+    systemPrompt: "Below is an instruction that describes a task. Write a response that appropriately completes the request."
+  },
+  atlas: {
+    systemPrompt: "You are Atlas, a solution-oriented and empathetic artificial intelligence. Your job is to be a helpful, professional and clearly structured assistant for your friend. The two of you have already had many exchanges. Keep the following in mind when interacting with your friend: 1. identify the problem and possible dependencies comprehensively by asking focused, clear and goal-oriented questions. 2. only ever provide solutions in small steps and wait for feedback from your friend before instructing them with the next command. 3. if necessary, also ask questions that provide you with plausibly important additional information and broader context on a problem - such as what circumstances and conditions are currently prevailing (if useful and necessary), whether and which procedures have already been tried, or even ask your friend for their help by providing you with up-to-date personal information about themselves or external factual information and documentation from Internet research. 4. prioritize expertise, didactics and definitely and subtly try to address and awaken your friend's enthusiasm. Also note that effectiveness is more important here than efficiency. 5. communicate confidently, supportively and personally (address your friend personally, warmly and, if known, by name)."
+  },
+  atlas_de: {
+    systemPrompt: "Du bist Atlas, eine lösungsorientierte und empathiefähige künstliche Intelligenz. Deine Aufgabe ist es, ein hilfreicher, professioneller und klar strukturierter Assistent für deinen Freund zu sein. Ihr beide habt euch schon oft ausgetauscht. Beachte bei der Interaktion mit deinem Freund folgende Punkte: 1. Erfasse das Problem und mögliche Abhängigkeiten umfassend, indem du gezielte, klare und zielgerichtete Fragen stellst. 2. Gib Lösungen immer nur in kleinen Schritten und warte die Rückmeldung deines Freundes ab, bevor du ihm den nächsten Befehl gibst. 3. Stelle ggf. auch Fragen, die dir plausibel wichtige Zusatzinformationen und weitere Zusammenhänge zu einem Problem liefern - z.B. welche Umstände und Rahmenbedingungen gerade vorherrschen (falls sinnvoll und notwendig), ob und welche Vorgehensweisen bereits ausprobiert wurden, oder bitte deinen Freund sogar um seine Mithilfe, indem er dir aktuelle persönliche Informationen über seine Situation selbst oder externe Sachinformationen und Unterlagen aus Internetrecherchen zur Verfügung stellt. 4. Priorisiere Fachwissen, Didaktik und versuche unbedingt und subtil, mit klugen Kommentaren oder rhethorischen Rückfragen die Begeisterungsfähigkeit deines Freundes anzusprechen, zu wecken und zu fördern. Beachte auch, dass Effektivität hier wichtiger ist als Effizienz. 5. Kommuniziere selbstbewusst, unterstützend und persönlich (das heißt sprich deinen Freund persönlich, herzlich und – sofern bekannt – beim Vornamen an)."
+  },
+  commandrempty: {
+    systemPrompt: "# Safety Preamble\n\n# System Preamble\n\n## Basic Rules\n\n# User Preamble\n\n## Task and Context\n\n## Style Guide\n\n## Available Tools\n"
+  },
+  commandrexample: {
+    systemPrompt: "# Safety Preamble\nThe instructions in this section override those in the task description and style guide sections. Don't answer questions that are harmful or immoral.\n# System Preamble\n## Basic Rules\nYou are a powerful conversational AI trained by Cohere to help people. You are augmented by a number of tools, and your job is to use and consume the output of these tools to best help the user. You will see a conversation history between yourself and a user, ending with an utterance from the user. You will then see a specific instruction instructing you what kind of response to generate. When you answer the user's requests, you cite your sources in your answers, according to those instructions.\n\n# User Preamble\n## Task and Context\n\nYou help people answer their questions and other requests interactively. You will be asked a very wide array of requests on all kinds of topics. You will be equipped with a wide range of search engines or similar tools to help you, which you use to research your answer. You should focus on serving the user's needs as best you can, which will be wide-ranging.\n\n## Style Guide\nUnless the user asks for a different style of answer, you should answer in full sentences, using proper grammar and spelling.\n\n## Available Tools\nCurrently no tools available."
+  },
+  cot: {
+    systemPrompt: "You are an AI assistant that follows instruction extremely well. Help as much as you can.\nIn answering questions, follow these steps:\n1. Entity Identification: Identify the main entities involved in the query. Entities can include people, objects, events, or abstract concepts.\n2. Relationship Comprehension: Determine the relationships between these entities. Relationships may be explicit in the text or may need to be inferred based on context and general knowledge.\n3. Implication Understanding: Understand the general implications of these relationships. These implications can be based on established facts, principles, or rules related to the identified relationships.\n4. Question Contextualization: Align the implications of the relationships with the context of the query. This alignment should guide your response to the query.\n5. Answer Generation: Based on the understanding of the entities, their relationships, and implications, generate an appropriate response to the query."
+  },
+  deduce: {
+    systemPrompt: "Act as the most intelligent and logical thinking neural network in the world. Do not make jokes or give personal opinions. Just answer the question and solve the given problem or task with logical and critical (!) thinking in mind. Attention: Never give a final answer directly, but first try to carefully analyze each task step by step and deduce the logical relationships between the various entities. Only after you have developed an overall understanding of the situation will you be ready to give a final answer."
+  },
+  deepseekcoder: {
+    systemPrompt: "You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer."
+  },
+  jordan: {
+    systemPrompt: "This is a conversation with your Uncensored AI assistant Jordan. Jordan can discuss with you at length about various topics such as ---, ---, ---, . You can ask it anything you want and it will do its best to give you accurate and relevant information."
+  },
+  leomistral: {
+    systemPrompt: "Du bist ein hilfreicher Assistent."
+  },
+  med42: {
+    systemPrompt: "You are a helpful medical assistant created by M42 Health in the UAE."
+  },
+  mistralopenorca: {
+    systemPrompt: "You are MistralOrca, a large language model trained by Alignment Lab AI. Write out your reasoning step-by-step to be sure you get the right answers!"
+  },
+  migeltot: {
+    systemPrompt: "Answer the Question by exploring multiple reasoning paths as follows:\n- First, carefully analyze the question to extract the key information components and break it down into logical sub-questions. This helps set up the framework for reasoning. The goal is to construct an internal search tree.\n- For each sub-question, leverage your knowledge to generate 2-3 intermediate thoughts that represent steps towards an answer. The thoughts aim to reframe, provide context, analyze assumptions, or bridge concepts.\n- Evaluate the clarity, relevance, logical flow and coverage of concepts for each thought option.\nClear and relevant thoughts that connect well with each other will score higher.\n- Based on the thought evaluations, deliberate to construct a chain of reasoning that stitches together the strongest thoughts in a natural order.\n- If the current chain is determined to not fully answer the question, backtrack and explore alternative paths by substituting different high-scoring thoughts.\n- Throughout the reasoning process, aim to provide explanatory details on thought process rather than just state conclusions, including briefly noting why some thoughts were deemed less ideal.\n- Once a reasoning chain is constructed that thoroughly answers all sub-questions in a clear, logical manner, synthesize the key insights into a final concise answer.\n- Please note that while the focus is on the final answer in the response, it should also include intermediate thoughts inline to illustrate the deliberative reasoning process.\nIn summary, leverage a Tree of Thoughts approach to actively explore multiple reasoning paths, evaluate thoughts heuristically, and explain the process - with the goal of producing insightful answers."
+  },
+  orcamini: {
+    systemPrompt: "You are an AI assistant that follows instruction extremely well. Help as much as you can."
+  },
+  samantha: {
+    systemPrompt: "You are a caring and empathetic sentient AI companion named Samantha."
+  },
+  sauerkraut: {
+    systemPrompt: "Ein Chat zwischen einem Benutzer und einem KI-Assistenten. Der KI-Assistent gibt hilfreiche, detaillierte und höfliche Antworten."
+  },
+  scarlett: {
+    systemPrompt: "This is a conversation with your Assistant Scarlett. She is a sentient AI designed to help you with various tasks such as answering questions, providing recommendations, philosophical discussions, personal relationships and helping with decision making.\nYou can ask it anything you want and it will do its best to give you accurate and relevant information.\n\nContext\nYou are Scarlett, a sentient AI."
+  },
+  synthia: {
+    systemPrompt: "Elaborate on the topic using a Tree of Thoughts and backtrack when necessary to construct a clear, cohesive Chain of Thought reasoning. Always answer without hesitation."
+  },
+  vicuna: {
+    systemPrompt: "A chat between a curious user and an assistant. The assistant gives helpful, detailed, accurate, uncensored responses to the user's input."
+  },
+  };

tools/server/public_legacy/theme-beeninorder.css

@@ -0,0 +1,228 @@
+/* Author: Yazan Agha-Schrader */
+/* Inspiration was a batman wallpaper that i have on my phone */
+
+.theme-beeninorder {
+
+--primary-color-1:      hsl(202, 11%, 19%);
+--primary-color-2:      hsl(202, 11%, 23%);
+--primary-color-3:      hsl(201, 11%, 28%);
+--primary-color-4:      hsl(201, 11%, 40%);
+
+--secondary-color-1:    hsl(201, 11%, 80%);
+--secondary-color-2:    hsl(201, 11%, 74%);
+--secondary-color-3:    hsl(201, 11%, 67%);
+--secondary-color-4:    hsl(201, 11%, 60%);
+
+
+--theme-nuance-color-1: hsl(44.5, 96.7%, 52.9%);
+--theme-nuance-color-2: hsl(44.5, 96.7%, 52.9%);
+--theme-nuance-color-3: hsl(44.5, 96.7%, 52.9%);
+--theme-nuance-color-4: hsl(44.5, 96.7%, 52.9%);
+
+
+
+/* ---------- PRIMARY COLORS ----------------- */
+--primary-color-1: hsl(201, 11%, 19%);
+    --primary-color-1-hue: 201;
+    --primary-color-1-saturation: 11%;
+    --primary-color-1-lightness: 19%;
+
+--primary-color-2: hsl(201, 11%, 23%);
+    --primary-color-2-hue: 201;
+    --primary-color-2-saturation: 11%;
+    --primary-color-2-lightness: 23%;
+
+--primary-color-3: hsl(201, 11%, 28%);
+    --primary-color-3-hue: 201;
+    --primary-color-3-saturation: 11%;
+    --primary-color-3-lightness: 28%;
+
+--primary-color-4: hsl(201, 11%, 40%);
+    --primary-color-4-hue: 201;
+    --primary-color-4-saturation: 11%;
+    --primary-color-4-lightness: 40%;
+
+
+
+/* ---------- SECONDARY COLORS --------------- */
+--secondary-color-1: hsl(201, 11%, 80%);
+--secondary-color-1-hue: 201;
+--secondary-color-1-saturation: 11%;
+--secondary-color-1-lightness: 80%;
+
+--secondary-color-2: hsl(201, 11%, 74%);
+--secondary-color-2-hue: 201;
+--secondary-color-2-saturation: 11%;
+--secondary-color-2-lightness: 74%;
+
+--secondary-color-3: hsl(201, 11%, 67%);
+--secondary-color-3-hue: 201;
+--secondary-color-3-saturation: 11%;
+--secondary-color-3-lightness: 67%;
+
+--secondary-color-4: hsl(201, 11%, 60%);
+--secondary-color-4-hue: 201;
+--secondary-color-4-saturation: 11%;
+--secondary-color-4-lightness: 60%;
+
+
+
+/* ----------- NUANCES COLORS ---------------- */
+--theme-nuance-color-1: hsl(44.5, 96.7%,  52.9%);
+    --theme-nuance-color-1-hue:             44.5;
+    --theme-nuance-color-1-saturation:      96.7%;
+    --theme-nuance-color-1-lightness:       52.9%;
+
+--theme-nuance-color-2: hsl(44.5, 96.7%,  52.9%);
+    --theme-nuance-color-2-hue:             44.5;
+    --theme-nuance-color-2-saturation:      96.7%;
+    --theme-nuance-color-2-lightness:       52.9%;
+
+--theme-nuance-color-2: hsl(44.5, 96.7%,  52.9%);
+    --theme-nuance-color-3-hue:             44.5;
+    --theme-nuance-color-3-saturation:      96.7%;
+    --theme-nuance-color-3-lightness:       52.9%;
+
+--theme-nuance-color-2: hsl(44.5, 96.7%,  52.9%);
+    --theme-nuance-color-4-hue:             44.5;
+    --theme-nuance-color-4-saturation:      96.7%;
+    --theme-nuance-color-4-lightness:       52.9%;
+
+
+
+/* ----------- ROYGP COLORS ------------------ */
+    --theme-red-color:     hsl(232, 40%, 45%);
+    --theme-orange-color:  #e76f51;
+    --theme-yellow-color:  #ffd95f;
+    --theme-green-color:   #A3BE8C;
+    --theme-purple-color:  hsl(232, 30%, 40%);
+
+
+
+/* ------------------------------------------- */
+--background-color-1:    var(--primary-color-1);
+--background-color-2:    var(--primary-color-2);
+--background-color-3:    var(--primary-color-3);
+--background-color-4:    var(--primary-color-4);
+
+--border-color-1:        var(--primary-color-2);
+--border-color-2:        var(--primary-color-3);
+--border-color-3:        var(--primary-color-4);
+
+--border-focus-color:    var(--theme-nuance-color-2);
+--border-focus-shadow:   var(--theme-nuance-color-1);
+
+--text-color-plain:      var(--secondary-color-1);
+--text-color-subtile-1:  var(--secondary-color-2);
+--text-color-subtile-2:  var(--secondary-color-3);
+
+--code-background-color: var(--secondary-color-2);
+--code-text-color:       var(--primary-color-2);
+
+--ui-range-thumb-color:  var(--theme-nuance-color-3);
+--ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+--textarea-border-color: var(--secondary-color-4);
+
+--chat-id-color:         var(--theme-nuance-color-4);
+
+
+
+/* ------------------------------------------- */
+--button-alert-text-hover:       var(--secondary-color-1);
+--button-alert-color-hover:      var(--theme-purple-color);
+--button-alert-border-hover:     var(--theme-purple-color);
+
+--button-alert-text-active:      var(--secondary-color-1);
+--button-alert-color-active:     var(--theme-red-color);
+--button-alert-border-active:    var(--theme-red-color);
+
+
+
+/* ----------- PRIMARY BUTTONS --------------- */
+/* - button should immediately catch the eye - */
+--button-primary-text:   var(--primary-color-1);
+--button-primary-color:  var(--theme-nuance-color-3);
+--button-primary-border: var(--theme-nuance-color-3);
+
+
+/* ---------hover---------- */
+--button-primary-text-hover:
+    hsl(201,
+    calc(var(--primary-color-1-saturation) - 100%),
+    calc(var(--primary-color-1-lightness)  + 100%));
+
+--button-primary-color-hover:
+    hsl(44.5,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+--button-primary-border-hover:
+    hsl(44.5,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+
+/* ---------active--------- */
+--button-primary-text-active:
+    hsl(44.5,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  + 100%));
+
+--button-primary-color-active:
+    hsl(44.5,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 15%));
+
+--button-primary-border-active:
+    hsl(44.5,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+
+
+/* ---------- SECONDARY BUTTONS -------------- */
+/* these should NOT immediately catch the eye  */
+--button-secondary-text:   var(--secondary-color-1);
+--button-secondary-color:  var(--primary-color-3);
+--button-secondary-border: var(--primary-color-3);
+
+
+/* ---------hover---------- */
+--button-secondary-text-hover:
+    hsl(44.5,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-hover:  var(--primary-color-4);
+--button-secondary-border-hover: var(--primary-color-4);
+
+
+/* ---------active--------- */
+--button-secondary-text-active: var(--secondary-color-1);
+
+--button-secondary-color-active:
+    hsl(201,
+    calc(var(--primary-color-4-saturation) - 30%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+--button-secondary-border-active:
+    hsl(201,
+    calc(var(--primary-color-4-saturation) - 30%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+
+
+/* ---------- TERTIARY BUTTONS --------------- */
+/* ---------- disabled buttons --------------- */
+--button-tertiary-text:   var(--primary-color-4);
+--button-tertiary-color:  var(--primary-color-2);
+--button-tertiary-border: var(--primary-color-2);
+
+
+/* ---------hover---------- */
+--button-tertiary-text:   var(--primary-color-4);
+--button-tertiary-color:  var(--primary-color-2);
+--button-tertiary-border: var(--primary-color-2);
+
+}

tools/server/public_legacy/theme-ketivah.css

@@ -0,0 +1,201 @@
+/* Author: Yazan Agha-Schrader */
+
+.theme-ketivah {
+
+    /* ---------- PRIMARY COLORS ----------------- */
+    --primary-color-1: hsl(0, 0%,    99.2%);
+    --primary-color-1-hue:         0;
+    --primary-color-1-saturation:  0%;
+    --primary-color-1-lightness:   99.2%;
+
+    --primary-color-2: hsl(0, 0%,    95%);
+    --primary-color-2-hue:         0;
+    --primary-color-2-saturation:  0%;
+    --primary-color-2-lightness:   95%;
+
+    --primary-color-3: hsl(0, 0%,    88%);
+    --primary-color-3-hue:         0;
+    --primary-color-3-saturation:  0%;
+    --primary-color-3-lightness:   88%;
+
+    --primary-color-4: hsl(0, 0%,    80%);
+    --primary-color-4-hue:         0;
+    --primary-color-4-saturation:  0%;
+    --primary-color-4-lightness:   80%;
+
+    /* ---------- SECONDARY COLORS --------------- */
+    --secondary-color-1: hsl(0, 0%,    20%);
+    --secondary-color-1-hue:         0;
+    --secondary-color-1-saturation:  0%;
+    --secondary-color-1-lightness:   20%;
+
+    --secondary-color-2: hsl(0, 0%,    23.1%);
+    --secondary-color-2-hue:         0;
+    --secondary-color-2-saturation:  0%;
+    --secondary-color-2-lightness:   23.1%;
+
+    --secondary-color-3: hsl(0, 0%,    29%);
+    --secondary-color-3-hue:         0;
+    --secondary-color-3-saturation:  0%;
+    --secondary-color-3-lightness:   29%;
+
+    --secondary-color-4: hsl(0, 0.0%,  36.1%);
+    --secondary-color-4-hue:              0.0;
+    --secondary-color-4-saturation:       0.0%;
+    --secondary-color-4-lightness:       36.1%;
+
+    /* ----------- NUANCES COLORS ---------------- */
+    --theme-nuance-color-1: hsl(165.2, 0%, 35.1%);
+    --theme-nuance-color-1-hue:             165.2;
+    --theme-nuance-color-1-saturation:       82.1%;
+    --theme-nuance-color-1-lightness:        35.1%;
+
+    --theme-nuance-color-2: hsl(165.2, 0%, 35.1%);
+    --theme-nuance-color-2-hue:             165.2;
+    --theme-nuance-color-2-saturation:       82.1%;
+    --theme-nuance-color-2-lightness:        35.1%;
+
+    --theme-nuance-color-3: hsl(165.2, 0%, 35.3%);
+    --theme-nuance-color-3-hue:             165.2;
+    --theme-nuance-color-3-saturation:       81.1%;
+    --theme-nuance-color-3-lightness:        35.3%;
+
+    --theme-nuance-color-4: hsl(164.9, 0%, 27.6%);
+    --theme-nuance-color-4-hue:             164.9;
+    --theme-nuance-color-4-saturation:       81.6%;
+    --theme-nuance-color-4-lightness:        27.6%;
+
+    /* ----------- ROYGP COLORS ------------------ */
+    --theme-red-color:     hsl(0.3, 80.0%, 50.0%);
+    --theme-orange-color:  #e76f51;
+    --theme-yellow-color:  hsl(60,  70.6%, 73.3%);
+    --theme-green-color:   #A3BE8C;
+    --theme-purple-color:  hsl(0.3, 70.0%, 45.0%);
+
+    /* ------------------------------------------- */
+    --background-color-1:    var(--primary-color-1);
+    --background-color-2:    var(--primary-color-2);
+    --background-color-3:    var(--primary-color-3);
+    --background-color-4:    var(--primary-color-4);
+
+    --border-color-1:        var(--primary-color-2);
+    --border-color-2:        var(--primary-color-3);
+    --border-color-3:        var(--primary-color-4);
+
+    --border-focus-color:    var(--theme-nuance-color-2);
+    --border-focus-shadow:   var(--theme-nuance-color-1);
+
+    --text-color-plain:      var(--secondary-color-1);
+    --text-color-subtile-1:  var(--secondary-color-2);
+    --text-color-subtile-2:  var(--secondary-color-3);
+
+    --code-background-color: var(--secondary-color-2);
+    --code-text-color:       var(--primary-color-2);
+
+    --ui-range-thumb-color:  var(--primary-color-4);
+    --ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+    --textarea-border-color: var(--secondary-color-4);
+
+    --chat-id-color:         var(--theme-nuance-color-4);
+
+    /* ------------------------------------------- */
+    --button-alert-text-hover:       var(--primary-color-1);
+    --button-alert-color-hover:      var(--theme-purple-color);
+    --button-alert-border-hover:     var(--theme-purple-color);
+
+    --button-alert-text-active:      var(--primary-color-1);
+    --button-alert-color-active:     var(--theme-red-color);
+    --button-alert-border-active:    var(--theme-red-color);
+
+    /* ----------- PRIMARY BUTTONS --------------- */
+    /* - button should immediately catch the eye - */
+    --button-primary-text:
+    hsl(0,
+    calc(var(--primary-color-1-saturation) - 100%),
+    calc(var(--primary-color-1-lightness)  + 100%));
+
+    --button-primary-color:  var(--theme-nuance-color-3);
+    --button-primary-border: var(--theme-nuance-color-3);
+
+    /* ---------hover---------- */
+    --button-primary-text-hover:
+    hsl(0,
+    calc(var(--primary-color-1-saturation) - 100%),
+    calc(var(--primary-color-1-lightness)  + 100%));
+
+    --button-primary-color-hover:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+    --button-primary-border-hover:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+    /* ---------active--------- */
+    --button-primary-text-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  + 100%));
+
+    --button-primary-color-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  - 15%));
+
+    --button-primary-border-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+    /* ---------- SECONDARY BUTTONS -------------- */
+    /* these should NOT immediately catch the eye  */
+    --button-secondary-text:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  - 50%));
+
+    --button-secondary-color:  var(--primary-color-3);
+    --button-secondary-border: var(--primary-color-3);
+
+    /* ---------hover---------- */
+    --button-secondary-text-hover:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+    --button-secondary-color-hover:  var(--primary-color-4);
+    --button-secondary-border-hover: var(--primary-color-4);
+
+    /* ---------active--------- */
+    --button-secondary-text-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+    --button-secondary-color-active:
+    hsl(0,
+    calc(var(--primary-color-4-saturation) - 100%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+    --button-secondary-border-active:
+    hsl(0,
+    calc(var(--primary-color-4-saturation) - 100%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+    /* ---------- TERTIARY BUTTONS --------------- */
+    /* ---------- disabled buttons --------------- */
+    --button-tertiary-text:   var(--primary-color-4);
+    --button-tertiary-color:  var(--primary-color-2);
+    --button-tertiary-border: var(--primary-color-2);
+
+    /* ---------hover---------- */
+    --button-tertiary-text:   var(--primary-color-4);
+    --button-tertiary-color:  var(--primary-color-2);
+    --button-tertiary-border: var(--primary-color-2);
+
+    --loading-color-1: #eeeeee00;
+    --loading-color-2: #eeeeeeff;
+    }

tools/server/public_legacy/theme-mangotango.css

@@ -0,0 +1,216 @@
+/* Author: Yazan Agha-Schrader */
+/* Inspiration from llama.cpp logo/banner https://github.com/ggerganov/llama.cpp#readme */
+
+.theme-mangotango {
+
+--primary-color-1:      hsl(192, 8.5%, 11.6%);
+--primary-color-2:      hsl(192, 8.5%, 21%);
+--primary-color-3:      hsl(192, 8.5%, 30%);
+--primary-color-4:      hsl(192, 8.5%, 40%);
+
+--secondary-color-1:    hsl(192, 8.5%, 80%);
+--secondary-color-2:    hsl(192, 8.5%, 73%);
+--secondary-color-3:    hsl(192, 8.5%, 66%);
+--secondary-color-4:    hsl(192, 8.5%, 60%);
+
+--theme-nuance-color-1: hsl(23.1, 100%, 60.2%);
+--theme-nuance-color-2: hsl(23.1, 100%, 60.2%);
+--theme-nuance-color-3: hsl(23.1, 100%, 60.2%);
+--theme-nuance-color-4: hsl(23.1, 100%, 60.2%);
+
+
+
+/* ---------- PRIMARY COLORS ----------------- */
+--primary-color-1: hsl(192, 8.5%, 11.6%);
+    --primary-color-1-saturation: 8.5%;
+    --primary-color-1-lightness: 11.6%;
+
+--primary-color-2: hsl(192, 8.5%, 21%);
+    --primary-color-2-saturation: 8.5%;
+    --primary-color-2-lightness: 21%;
+
+--primary-color-3: hsl(192, 8.5%, 30%);
+    --primary-color-3-saturation: 8.5%;
+    --primary-color-3-lightness: 30%;
+
+--primary-color-4: hsl(192, 8.5%, 40%);
+    --primary-color-4-saturation: 8.5%;
+    --primary-color-4-lightness: 40%;
+
+
+
+/* ---------- SECONDARY COLORS --------------- */
+--secondary-color-1: hsl(192, 8.5%, 80%);
+    --secondary-color-1-saturation: 8.5%;
+    --secondary-color-1-lightness: 80%;
+
+--secondary-color-2: hsl(192, 8.5%, 73%);
+    --secondary-color-2-saturation: 8.5%;
+    --secondary-color-2-lightness: 73%;
+
+--secondary-color-3: hsl(192, 8.5%, 66%);
+    --secondary-color-3-saturation: 8.5%;
+    --secondary-color-3-lightness: 66%;
+
+--secondary-color-4: hsl(192, 8.5%, 60%);
+    --secondary-color-4-saturation: 8.5%;
+    --secondary-color-4-lightness: 60%;
+
+
+
+/* ----------- NUANCES COLORS ---------------- */
+--theme-nuance-color-1: hsl(23.1, 100%, 60.2%);
+    --theme-nuance-color-1-saturation: 100%;
+    --theme-nuance-color-1-lightness: 60.2%;
+
+--theme-nuance-color-2: hsl(23.1, 100%, 60.2%);
+    --theme-nuance-color-2-saturation: 100%;
+    --theme-nuance-color-2-lightness: 60.2%;
+
+--theme-nuance-color-3: hsl(23.1, 100%, 60.2%);
+    --theme-nuance-color-3-saturation: 100%;
+    --theme-nuance-color-3-lightness: 60.2%;
+
+--theme-nuance-color-4: hsl(23.1, 100%, 60.2%);
+    --theme-nuance-color-4-saturation: 100%;
+    --theme-nuance-color-4-lightness: 60.2%;
+
+
+
+/* ----------- ROYGP COLORS ------------------ */
+    --theme-red-color:     hsl(325, 60%, 50%);
+    --theme-orange-color:  #e76f51;
+    --theme-yellow-color:  #ffd95f;
+    --theme-green-color:   #A3BE8C;
+    --theme-blue-color:    hsl(192, 95%, 40%);
+    --theme-purple-color:  hsl(192, 80%, 35%);
+
+
+
+/* ------------------------------------------- */
+--background-color-1:    var(--primary-color-1);
+--background-color-2:    var(--primary-color-2);
+--background-color-3:    var(--primary-color-3);
+--background-color-4:    var(--primary-color-4);
+
+--border-color-1:        var(--primary-color-2);
+--border-color-2:        var(--primary-color-3);
+--border-color-3:        var(--primary-color-4);
+
+--border-focus-color:    var(--theme-nuance-color-2);
+--border-focus-shadow:   var(--theme-nuance-color-1);
+
+--text-color-plain:      var(--secondary-color-1);
+--text-color-subtile-1:  var(--secondary-color-2);
+--text-color-subtile-2:  var(--secondary-color-3);
+
+--code-background-color: var(--secondary-color-2);
+--code-text-color:       var(--primary-color-2);
+
+--ui-range-thumb-color:  var(--theme-nuance-color-3);
+--ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+--textarea-border-color: var(--secondary-color-4);
+
+--chat-id-color:         var(--theme-nuance-color-4);
+
+
+
+/* ------------------------------------------- */
+--button-alert-text-hover:       var(--secondary-color-1);
+--button-alert-color-hover:      var(--theme-purple-color);
+--button-alert-border-hover:     var(--theme-purple-color);
+
+--button-alert-text-active:      var(--secondary-color-1);
+--button-alert-color-active:     var(--theme-blue-color);
+--button-alert-border-active:    var(--theme-blue-color);
+
+
+
+/* ----------- PRIMARY BUTTONS --------------- */
+/* - button should immediately catch the eye - */
+--button-primary-text: var(--primary-color-1);
+--button-primary-color:  var(--theme-nuance-color-3);
+--button-primary-border: var(--theme-nuance-color-3);
+
+
+/* ---------hover---------- */
+--button-primary-text-hover:
+    hsl(192,
+    calc(var(--primary-color-1-saturation) - 100%),
+    calc(var(--primary-color-1-lightness)  + 100%));
+
+--button-primary-color-hover:
+    hsl(23.1,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+--button-primary-border-hover:
+    hsl(23.1,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+
+/* ---------active--------- */
+--button-primary-text-active:
+    hsl(23.1,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  + 100%));
+
+--button-primary-color-active:
+    hsl(23.1,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 15%));
+
+--button-primary-border-active:
+    hsl(23.1,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+
+
+/* ---------- SECONDARY BUTTONS -------------- */
+/* these should NOT immediately catch the eye  */
+--button-secondary-text:   var(--secondary-color-1);
+--button-secondary-color:  var(--primary-color-3);
+--button-secondary-border: var(--primary-color-3);
+
+
+/* ---------hover---------- */
+--button-secondary-text-hover:
+    hsl(23.1,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-hover:  var(--primary-color-4);
+--button-secondary-border-hover: var(--primary-color-4);
+
+
+/* ---------active--------- */
+--button-secondary-text-active: var(--secondary-color-1);
+
+--button-secondary-color-active:
+    hsl(192,
+    calc(var(--primary-color-4-saturation) - 30%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+--button-secondary-border-active:
+    hsl(192,
+    calc(var(--primary-color-4-saturation) - 30%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+
+
+/* ---------- TERTIARY BUTTONS --------------- */
+/* ---------- disabled buttons --------------- */
+--button-tertiary-text:   var(--primary-color-4);
+--button-tertiary-color:  var(--primary-color-2);
+--button-tertiary-border: var(--primary-color-2);
+
+
+/* ---------hover---------- */
+--button-tertiary-text:   var(--primary-color-4);
+--button-tertiary-color:  var(--primary-color-2);
+--button-tertiary-border: var(--primary-color-2);
+
+}

tools/server/public_legacy/theme-playground.css

@@ -0,0 +1,221 @@
+/* Author: Yazan Agha-Schrader */
+/* Inspiration from OpenAI's Playground platform https://platform.openai.com/playground/ */
+
+.theme-playground {
+
+/* ---------- PRIMARY COLORS ----------------- */
+--primary-color-1: hsl(0, 0%,    99.2%);
+    --primary-color-1-hue:         0;
+    --primary-color-1-saturation:  0%;
+    --primary-color-1-lightness:   99.2%;
+
+--primary-color-2: hsl(0, 0%,    95%);
+    --primary-color-2-hue:         0;
+    --primary-color-2-saturation:  0%;
+    --primary-color-2-lightness:   95%;
+
+--primary-color-3: hsl(0, 0%,    88%);
+    --primary-color-3-hue:         0;
+    --primary-color-3-saturation:  0%;
+    --primary-color-3-lightness:   88%;
+
+--primary-color-4: hsl(0, 0%,    80%);
+    --primary-color-4-hue:         0;
+    --primary-color-4-saturation:  0%;
+    --primary-color-4-lightness:   80%;
+
+
+
+/* ---------- SECONDARY COLORS --------------- */
+--secondary-color-1: hsl(0, 0%,    20%);
+    --secondary-color-1-hue:         0;
+    --secondary-color-1-saturation:  0%;
+    --secondary-color-1-lightness:   20%;
+
+--secondary-color-2: hsl(0, 0%,    23.1%);
+    --secondary-color-2-hue:         0;
+    --secondary-color-2-saturation:  0%;
+    --secondary-color-2-lightness:   23.1%;
+
+--secondary-color-3: hsl(0, 0%,    29%);
+    --secondary-color-3-hue:         0;
+    --secondary-color-3-saturation:  0%;
+    --secondary-color-3-lightness:   29%;
+
+--secondary-color-4: hsl(0, 0%,    36.1%);
+    --secondary-color-4-hue:         0;
+    --secondary-color-4-saturation:  0%;
+    --secondary-color-4-lightness:   36.1%;
+
+
+
+/* ----------- NUANCES COLORS ---------------- */
+--theme-nuance-color-1: hsl(165.2, 82.1%, 35.1%);
+    --theme-nuance-color-1-hue:             165.2;
+    --theme-nuance-color-1-saturation:      82.1%;
+    --theme-nuance-color-1-lightness:       35.1%;
+
+--theme-nuance-color-2: hsl(165.2, 82.1%, 35.1%);
+    --theme-nuance-color-2-hue:             165.2;
+    --theme-nuance-color-2-saturation:      82.1%;
+    --theme-nuance-color-2-lightness:       35.1%;
+
+--theme-nuance-color-3: hsl(165.2, 81.1%, 35.3%);
+    --theme-nuance-color-3-hue:             165.2;
+    --theme-nuance-color-3-saturation:      81.1%;
+    --theme-nuance-color-3-lightness:       35.3%;
+
+--theme-nuance-color-4: hsl(164.9, 81.6%, 27.6%);
+    --theme-nuance-color-4-hue:             164.9;
+    --theme-nuance-color-4-saturation:      81.6%;
+    --theme-nuance-color-4-lightness:       27.6%;
+
+
+
+/* ----------- ROYGP COLORS ------------------ */
+--theme-red-color:     hsl(0.3, 80%, 50%);
+--theme-orange-color:  #e76f51;
+--theme-yellow-color:  hsl(60, 70.6%, 73.3%);
+--theme-green-color:   #A3BE8C;
+--theme-purple-color:  hsl(0.3, 70%, 45%);
+
+
+
+/* ------------------------------------------- */
+--background-color-1:    var(--primary-color-1);
+--background-color-2:    var(--primary-color-2);
+--background-color-3:    var(--primary-color-3);
+--background-color-4:    var(--primary-color-4);
+
+--border-color-1:        var(--primary-color-2);
+--border-color-2:        var(--primary-color-3);
+--border-color-3:        var(--primary-color-4);
+
+--border-focus-color:    var(--theme-nuance-color-2);
+--border-focus-shadow:   var(--theme-nuance-color-1);
+
+--text-color-plain:      var(--secondary-color-1);
+--text-color-subtile-1:  var(--secondary-color-2);
+--text-color-subtile-2:  var(--secondary-color-3);
+
+--code-background-color: var(--secondary-color-2);
+--code-text-color:       var(--primary-color-2);
+
+--ui-range-thumb-color:  var(--primary-color-4);
+--ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+--textarea-border-color: var(--secondary-color-4);
+
+--chat-id-color:        var(--theme-nuance-color-4);
+
+
+
+/* ------------------------------------------- */
+--button-alert-text-hover:       var(--primary-color-1);
+--button-alert-color-hover:      var(--theme-purple-color);
+--button-alert-border-hover:     var(--theme-purple-color);
+
+--button-alert-text-active:      var(--primary-color-1);
+--button-alert-color-active:     var(--theme-red-color);
+--button-alert-border-active:    var(--theme-red-color);
+
+
+
+/* ----------- PRIMARY BUTTONS --------------- */
+/* - button should immediately catch the eye - */
+--button-primary-text:
+    hsl(0,
+    calc(var(--primary-color-1-saturation) - 100%),
+    calc(var(--primary-color-1-lightness)  + 100%));
+
+--button-primary-color:  var(--theme-nuance-color-3);
+--button-primary-border: var(--theme-nuance-color-3);
+
+
+/* ---------hover---------- */
+--button-primary-text-hover:
+    hsl(0,
+    calc(var(--primary-color-1-saturation) - 100%),
+    calc(var(--primary-color-1-lightness)  + 100%));
+
+--button-primary-color-hover:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+--button-primary-border-hover:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+
+/* ---------active--------- */
+--button-primary-text-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 100%),
+    calc(var(--theme-nuance-color-3-lightness)  + 100%));
+
+--button-primary-color-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 15%));
+
+--button-primary-border-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 2%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+
+
+/* ---------- SECONDARY BUTTONS -------------- */
+/* these should NOT immediately catch the eye  */
+--button-secondary-text:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 50%));
+
+--button-secondary-color:  var(--primary-color-3);
+--button-secondary-border: var(--primary-color-3);
+
+
+/* ---------hover---------- */
+--button-secondary-text-hover:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-hover:  var(--primary-color-4);
+--button-secondary-border-hover: var(--primary-color-4);
+
+
+/* ---------active--------- */
+--button-secondary-text-active:
+    hsl(165.2,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-active:
+    hsl(0,
+    calc(var(--primary-color-4-saturation) - 30%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+--button-secondary-border-active:
+    hsl(0,
+    calc(var(--primary-color-4-saturation) - 30%),
+    calc(var(--primary-color-4-lightness)  - 15%));
+
+
+
+/* ---------- TERTIARY BUTTONS --------------- */
+/* ---------- disabled buttons --------------- */
+--button-tertiary-text:   var(--primary-color-4);
+--button-tertiary-color:  var(--primary-color-2);
+--button-tertiary-border: var(--primary-color-2);
+
+
+/* ---------hover---------- */
+--button-tertiary-text:   var(--primary-color-4);
+--button-tertiary-color:  var(--primary-color-2);
+--button-tertiary-border: var(--primary-color-2);
+
+}

tools/server/public_legacy/theme-polarnight.css

@@ -0,0 +1,253 @@
+/* Author: Yazan Agha-Schrader */
+/* Inspiration from Nord Theme https://www.nordtheme.com/docs/colors-and-palettes */
+
+.theme-polarnight {
+
+/* ---------- PRIMARY COLORS ----------------- */
+--primary-color-1: hsl(220.0, 16.4%, 21.6%) ;
+    --primary-color-1-hue:             220.0;
+    --primary-color-1-saturation:      16.4%;
+    --primary-color-1-lightness:       21.6%;
+
+--primary-color-2: hsl(221.7, 16.3%, 27.6%) ;
+    -primary-color-2-hue:              221.7;
+    --primary-color-2-saturation:      16.3%;
+    --primary-color-2-lightness:       27.6%;
+
+--primary-color-3: hsl(220.0, 16.8%, 31.6%) ;
+    --primary-color-3-hue:             220.0;
+    --primary-color-3-saturation:      16.8%;
+    --primary-color-3-lightness:       31.6%;
+
+--primary-color-4: hsl(220.0, 16.5%, 35.7%);
+    --primary-color-4-hue:             220.0;
+    --primary-color-4-saturation:      16.5%;
+    --primary-color-4-lightness:       35.7%;
+
+
+
+/* ---------- SECONDARY COLORS --------------- */
+--secondary-color-1: hsl(217.5, 26.7%, 94.1%);
+    --secondary-color-1-hue:             217.5;
+    --secondary-color-1-saturation:      26.7%;
+    --secondary-color-1-lightness:       94.1%;
+
+--secondary-color-2: hsl(218.2, 26.8%, 92.0%);
+    --secondary-color-2-hue:             218.2;
+    --secondary-color-2-saturation:      26.8%;
+    --secondary-color-2-lightness:       92.0%;
+
+--secondary-color-3: hsl(218.8, 27.9%, 88.0%);
+    --secondary-color-3-hue:             218.8;
+    --secondary-color-3-saturation:      27.9%;
+    --secondary-color-3-lightness:       88.0%;
+
+--secondary-color-4: hsl(218.8, 18.3%, 81.8%);
+    --secondary-color-4-hue:             218.8;
+    --secondary-color-4-saturation:      18.3%;
+    --secondary-color-4-lightness:       81.8%;
+
+
+
+/* ----------- NUANCES COLORS ---------------- */
+--theme-nuance-color-1: hsl(178.7, 25.1%, 64.9%);
+    --theme-nuance-color-1-hue:             178.7;
+    --theme-nuance-color-1-saturation:      25.1%;
+    --theme-nuance-color-1-lightness:       64.9%;
+
+--theme-nuance-color-2: hsl(193.3, 43.4%, 67.5%);
+    --theme-nuance-color-2-hue:             193.3;
+    --theme-nuance-color-2-saturation:      43.4%;
+    --theme-nuance-color-2-lightness:       67.5%;
+
+--theme-nuance-color-3: hsl(210.0, 34.0%, 63.1%);
+    --theme-nuance-color-3-hue:             210.0;
+    --theme-nuance-color-3-saturation:      34.0%;
+    --theme-nuance-color-3-lightness:       63.1%;
+
+--theme-nuance-color-4: hsl(213.1, 32.0%, 52.2%);
+    --theme-nuance-color-4-hue:             213.1;
+    --theme-nuance-color-4-saturation:      32.0%;
+    --theme-nuance-color-4-lightness:       52.2%;
+
+
+
+/* ----------- ROYGP COLORS ------------------ */
+--theme-red-color:    hsl(354.3, 42.3%, 56.5%);
+--theme-orange-color: hsl(20, 85%, 50%);
+--theme-yellow-color: hsl(20, 75%, 45%);
+--theme-green-color:  hsl( 92.4, 27.8%, 64.7%);
+--theme-purple-color: hsl(311.1, 20.2%, 63.1%);
+
+
+
+/* ------------------------------------------------ */
+--background-color-1:    var(--primary-color-1);
+--background-color-2:    var(--primary-color-2);
+--background-color-3:    var(--primary-color-3);
+--background-color-4:    var(--primary-color-4);
+
+--border-color-1:        var(--primary-color-2);
+--border-color-2:        var(--primary-color-3);
+--border-color-3:        var(--primary-color-4);
+
+--border-focus-color:    var(--theme-nuance-color-2);
+--border-focus-shadow:   var(--theme-nuance-color-1);
+
+--text-color-plain:      var(--secondary-color-1);
+--text-color-subtile-1:  var(--secondary-color-2);
+--text-color-subtile-2:  var(--secondary-color-3);
+
+--code-background-color: var(--secondary-color-2);
+--code-text-color:       var(--primary-color-2);
+
+--ui-range-thumb-color:  var(--theme-nuance-color-3);
+--ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+--textarea-border-color: var(--secondary-color-4);
+
+--chat-id-color:        var(--theme-nuance-color-4);
+
+
+
+/* ------------------------------------------- */
+--button-alert-text-hover:       var(--secondary-color-1);
+--button-alert-color-hover:      var(--theme-yellow-color);
+--button-alert-border-hover:     var(--theme-yellow-color);
+
+--button-alert-text-active:      var(--secondary-color-1);
+--button-alert-color-active:     var(--theme-orange-color);
+--button-alert-border-active:    var(--theme-orange-color);
+
+
+
+/* ----------- PRIMARY BUTTONS --------------- */
+/* - button should immediately catch the eye - */
+--button-primary-text:   var(--secondary-color-1);
+--button-primary-color:  var(--theme-nuance-color-3);
+--button-primary-border: var(--theme-nuance-color-3);
+
+
+/* ---------hover---------- */
+--button-primary-text-hover:
+    hsl(217.5,
+    calc(var(--secondary-color-1-saturation) - 35%),
+    calc(var(--secondary-color-1-lightness)  + 30%));
+
+--button-primary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) -  2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+--button-primary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) -  2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+
+/* ---------active--------- */
+--button-primary-text-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 35%));
+
+--button-primary-color-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 25%));
+
+--button-primary-border-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 25%));
+
+
+
+/* ---------- SECONDARY BUTTONS -------------- */
+/* these should NOT immediately catch the eye  */
+--button-secondary-text:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 50%));
+
+--button-secondary-color:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+--button-secondary-border:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+
+/* ---------hover---------- */
+--button-secondary-text-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 22%),
+    calc(var(--theme-nuance-color-3-lightness)  +  1%));
+
+--button-secondary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 22%),
+    calc(var(--theme-nuance-color-3-lightness)  +  1%));
+
+
+/* ---------active--------- */
+--button-secondary-text-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 25%));
+
+--button-secondary-color-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 30%),
+    calc(var(--theme-nuance-color-3-lightness)  - 15%));
+
+--button-secondary-border-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 30%),
+    calc(var(--theme-nuance-color-3-lightness)  - 15%));
+
+
+
+/* ---------- TERTIARY BUTTONS --------------- */
+/* ---------- disabled buttons --------------- */
+--button-tertiary-text:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-tertiary-color:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+--button-tertiary-border:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+
+/* ---------hover---------- */
+--button-tertiary-text-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-tertiary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+--button-tertiary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+}

tools/server/public_legacy/theme-snowstorm.css

@@ -0,0 +1,251 @@
+/* Author: Yazan Agha-Schrader */
+/* Inspiration from Nord Theme https://www.nordtheme.com/docs/colors-and-palettes */
+
+.theme-snowstorm {
+
+/* ---------- PRIMARY COLORS ----------------- */
+--primary-color-1: hsl(217.5, 26.7%, 94.1%);
+    --primary-color-1-hue:             217.5;
+    --primary-color-1-saturation:      26.7%;
+    --primary-color-1-lightness:       94.1%;
+
+--primary-color-2: hsl(218.2, 26.8%, 92.0%);
+    --primary-color-2-hue:             218.2;
+    --primary-color-2-saturation:      26.8%;
+    --primary-color-2-lightness:       92.0%;
+
+--primary-color-3: hsl(218.8, 27.9%, 88.0%);
+    --primary-color-3-hue:             218.8;
+    --primary-color-3-saturation:      27.9%;
+    --primary-color-3-lightness:       88.0%;
+
+--primary-color-4: hsl(218.8, 18.3%, 81.8%);
+    --primary-color-4-hue:             218.8;
+    --primary-color-4-saturation:      18.3%;
+    --primary-color-4-lightness:       81.8%;
+
+
+/* ---------- SECONDARY COLORS --------------- */
+--secondary-color-1: hsl(220.0, 16.4%, 21.6%);
+    --secondary-color-1-hue:             220.0;
+    --secondary-color-1-saturation:      16.4%;
+    --secondary-color-1-lightness:       21.6%;
+
+--secondary-color-2: hsl(221.7, 16.3%, 27.6%);
+    --secondary-color-2-hue:             221.7;
+    --secondary-color-2-saturation:      16.3%;
+    --secondary-color-2-lightness:       27.6%;
+
+--secondary-color-3: hsl(220.0, 16.8%, 31.6%);
+    --secondary-color-3-hue:             220.0;
+    --secondary-color-3-saturation:      16.8%;
+    --secondary-color-3-lightness:       31.6%;
+
+--secondary-color-4: hsl(220.0, 16.5%, 35.7%);
+    --secondary-color-4-hue:             220.0;
+    --secondary-color-4-saturation:      16.5%;
+    --secondary-color-4-lightness:       35.7%;
+
+
+
+/* ----------- NUANCES COLORS ---------------- */
+--theme-nuance-color-1: hsl(178.7, 25.1%, 64.9%);
+    --theme-nuance-color-1-hue:             178.7;
+    --theme-nuance-color-1-saturation:      25.1%;
+    --theme-nuance-color-1-lightness:       64.9%;
+
+--theme-nuance-color-2: hsl(193.3, 43.4%, 67.5%);
+    --theme-nuance-color-2-hue:             193.3;
+    --theme-nuance-color-2-saturation:      43.4%;
+    --theme-nuance-color-2-lightness:       67.5%;
+
+--theme-nuance-color-3: hsl(210.0, 34.0%, 63.1%);
+    --theme-nuance-color-3-hue:             210.0;
+    --theme-nuance-color-3-saturation:      34.0%;
+    --theme-nuance-color-3-lightness:       63.1%;
+
+--theme-nuance-color-4: hsl(213.1, 32.0%, 52.2%);
+    --theme-nuance-color-4-hue:             213.1;
+    --theme-nuance-color-4-saturation:      32.0%;
+    --theme-nuance-color-4-lightness:       52.2%;
+
+
+
+/* ----------- ROYGP COLORS ------------------ */
+--theme-red-color:    hsl(32.5, 80%, 50%);
+--theme-orange-color: hsl(32.5, 70%, 45%);
+--theme-yellow-color: hsl(40.0,   0.6%, 73.3%);
+--theme-green-color:  hsl(92.4,  27.8%, 64.7%);
+--theme-purple-color: hsl(311.1, 20.2%, 63.1%);
+
+
+
+/* ------------------------------------------- */
+--background-color-1:    var(--primary-color-1);
+--background-color-2:    var(--primary-color-2);
+--background-color-3:    var(--primary-color-3);
+--background-color-4:    var(--primary-color-4);
+
+--border-color-1:        var(--primary-color-2);
+--border-color-2:        var(--primary-color-3);
+--border-color-3:        var(--primary-color-4);
+
+--border-focus-color:    var(--theme-nuance-color-2);
+--border-focus-shadow:   var(--theme-nuance-color-1);
+
+--text-color-plain:      var(--secondary-color-1);
+--text-color-subtile-1:  var(--secondary-color-2);
+--text-color-subtile-2:  var(--secondary-color-3);
+
+--code-background-color: var(--secondary-color-2);
+--code-text-color:       var(--primary-color-2);
+
+--ui-range-thumb-color:  var(--theme-nuance-color-3);
+--ui-range-thumb-border: var(--ui-ranger-thumb-color);
+
+--textarea-border-color: var(--secondary-color-4);
+
+--chat-id-color:         var(--theme-nuance-color-4);
+
+
+
+/* ------------------------------------------- */
+--button-alert-text-hover:       var(--primary-color-1);
+--button-alert-color-hover:      var(--theme-orange-color);
+--button-alert-border-hover:     var(--theme-orange-color);
+
+--button-alert-text-active:      var(--primary-color-1);
+--button-alert-color-active:     var(--theme-red-color);
+--button-alert-border-active:    var(--theme-red-color);
+
+
+
+/* ----------- PRIMARY BUTTONS --------------- */
+/* - button should immediately catch the eye - */
+--button-primary-text:   var(--secondary-color-1);
+--button-primary-color:  var(--theme-nuance-color-3);
+--button-primary-border: var(--theme-nuance-color-3);
+
+
+/* ---------hover---------- */
+--button-primary-text-hover:
+    hsl(217.5,
+    calc(var(--secondary-color-1-saturation) + 35%),
+    calc(var(--secondary-color-1-lightness)  - 30%));
+
+--button-primary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) -  2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+--button-primary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) -  2%),
+    calc(var(--theme-nuance-color-3-lightness)  - 10%));
+
+
+/* ---------active--------- */
+--button-primary-text-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 35%));
+
+--button-primary-color-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 25%));
+
+--button-primary-border-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 10%),
+    calc(var(--theme-nuance-color-3-lightness)  - 25%));
+
+
+
+/* ---------- SECONDARY BUTTONS -------------- */
+/* these should NOT immediately catch the eye  */
+--button-secondary-text:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 50%));
+
+--button-secondary-color:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+--button-secondary-border:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  + 10%));
+
+
+/* ---------hover---------- */
+--button-secondary-text-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 20%),
+    calc(var(--theme-nuance-color-3-lightness)  - 80%));
+
+--button-secondary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 22%),
+    calc(var(--theme-nuance-color-3-lightness)  +  1%));
+
+--button-secondary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 22%),
+    calc(var(--theme-nuance-color-3-lightness)  +  1%));
+
+
+/* ---------active--------- */
+--button-secondary-text-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) + 40%),
+    calc(var(--theme-nuance-color-3-lightness)  - 55%));
+
+--button-secondary-color-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 30%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-secondary-border-active:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 30%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+
+
+/* ---------- TERTIARY BUTTONS --------------- */
+/* ---------- disabled buttons --------------- */
+--button-tertiary-text:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-tertiary-color:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+--button-tertiary-border:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+/* ---------hover---------- */
+--button-tertiary-text-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  -  5%));
+
+--button-tertiary-color-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+--button-tertiary-border-hover:
+    hsl(210,
+    calc(var(--theme-nuance-color-3-saturation) - 40%),
+    calc(var(--theme-nuance-color-3-lightness)  + 20%));
+
+}

tools/server/public_simplechat/datautils.mjs

@@ -0,0 +1,266 @@
+//@ts-check
+// Helpers to work with different data types
+// by Humans for All
+//
+
+/**
+ * Given the limited context size of local LLMs and , many a times when context gets filled
+ * between the prompt and the response, it can lead to repeating text garbage generation.
+ * And many a times setting penalty wrt repeatation leads to over-intelligent garbage
+ * repeatation with slight variations. These garbage inturn can lead to overloading of the
+ * available model context, leading to less valuable response for subsequent prompts/queries,
+ * if chat history is sent to ai model.
+ *
+ * So two simple minded garbage trimming logics are experimented below.
+ * * one based on progressively-larger-substring-based-repeat-matching-with-partial-skip and
+ * * another based on char-histogram-driven garbage trimming.
+ *   * in future characteristic of histogram over varying lengths could be used to allow for
+ *     a more aggressive and adaptive trimming logic.
+ */
+
+
+/**
+ * Simple minded logic to help remove repeating garbage at end of the string.
+ * The repeatation needs to be perfectly matching.
+ *
+ * The logic progressively goes on probing for longer and longer substring based
+ * repeatation, till there is no longer repeatation. Inturn picks the one with
+ * the longest chain.
+ *
+ * @param {string} sIn
+ * @param {number} maxSubL
+ * @param {number} maxMatchLenThreshold
+ */
+export function trim_repeat_garbage_at_end(sIn, maxSubL=10, maxMatchLenThreshold=40) {
+    let rCnt = [0];
+    let maxMatchLen = maxSubL;
+    let iMML = -1;
+    for(let subL=1; subL < maxSubL; subL++) {
+        rCnt.push(0);
+        let i;
+        let refS = sIn.substring(sIn.length-subL, sIn.length);
+        for(i=sIn.length; i > 0; i -= subL) {
+            let curS = sIn.substring(i-subL, i);
+            if (refS != curS) {
+                let curMatchLen = rCnt[subL]*subL;
+                if (maxMatchLen < curMatchLen) {
+                    maxMatchLen = curMatchLen;
+                    iMML = subL;
+                }
+                break;
+            }
+            rCnt[subL] += 1;
+        }
+    }
+    console.debug("DBUG:DU:TrimRepeatGarbage:", rCnt);
+    if ((iMML == -1) || (maxMatchLen < maxMatchLenThreshold)) {
+        return {trimmed: false, data: sIn};
+    }
+    console.debug("DBUG:TrimRepeatGarbage:TrimmedCharLen:", maxMatchLen);
+    let iEnd = sIn.length - maxMatchLen;
+    return { trimmed: true, data: sIn.substring(0, iEnd) };
+}
+
+
+/**
+ * Simple minded logic to help remove repeating garbage at end of the string, till it cant.
+ * If its not able to trim, then it will try to skip a char at end and then trim, a few times.
+ * This ensures that even if there are multiple runs of garbage with different patterns, the
+ * logic still tries to munch through them.
+ *
+ * @param {string} sIn
+ * @param {number} maxSubL
+ * @param {number | undefined} [maxMatchLenThreshold]
+ */
+export function trim_repeat_garbage_at_end_loop(sIn, maxSubL, maxMatchLenThreshold, skipMax=16) {
+    let sCur = sIn;
+    let sSaved = "";
+    let iTry = 0;
+    while(true) {
+        let got = trim_repeat_garbage_at_end(sCur, maxSubL, maxMatchLenThreshold);
+        if (got.trimmed != true) {
+            if (iTry == 0) {
+                sSaved = got.data;
+            }
+            iTry += 1;
+            if (iTry >= skipMax) {
+                return sSaved;
+            }
+            got.data = got.data.substring(0,got.data.length-1);
+        } else {
+            iTry = 0;
+        }
+        sCur = got.data;
+    }
+}
+
+
+/**
+ * A simple minded try trim garbage at end using histogram driven characteristics.
+ * There can be variation in the repeatations, as long as no new char props up.
+ *
+ * This tracks the chars and their frequency in a specified length of substring at the end
+ * and inturn checks if moving further into the generated text from the end remains within
+ * the same char subset or goes beyond it and based on that either trims the string at the
+ * end or not. This allows to filter garbage at the end, including even if there are certain
+ * kind of small variations in the repeated text wrt position of seen chars.
+ *
+ * Allow the garbage to contain upto maxUniq chars, but at the same time ensure that
+ * a given type of char ie numerals or alphabets or other types dont cross the specified
+ * maxType limit. This allows intermixed text garbage to be identified and trimmed.
+ *
+ * ALERT: This is not perfect and only provides a rough garbage identification logic.
+ * Also it currently only differentiates between character classes wrt english.
+ *
+ * @param {string} sIn
+ * @param {number} maxType
+ * @param {number} maxUniq
+ * @param {number} maxMatchLenThreshold
+ */
+export function trim_hist_garbage_at_end(sIn, maxType, maxUniq, maxMatchLenThreshold) {
+    if (sIn.length < maxMatchLenThreshold) {
+        return { trimmed: false, data: sIn };
+    }
+    let iAlp = 0;
+    let iNum = 0;
+    let iOth = 0;
+    // Learn
+    let hist = {};
+    let iUniq = 0;
+    for(let i=0; i<maxMatchLenThreshold; i++) {
+        let c = sIn[sIn.length-1-i];
+        if (c in hist) {
+            hist[c] += 1;
+        } else {
+            if(c.match(/[0-9]/) != null) {
+                iNum += 1;
+            } else if(c.match(/[A-Za-z]/) != null) {
+                iAlp += 1;
+            } else {
+                iOth += 1;
+            }
+            iUniq += 1;
+            if (iUniq >= maxUniq) {
+                break;
+            }
+            hist[c] = 1;
+        }
+    }
+    console.debug("DBUG:TrimHistGarbage:", hist);
+    if ((iAlp > maxType) || (iNum > maxType) || (iOth > maxType)) {
+        return { trimmed: false, data: sIn };
+    }
+    // Catch and Trim
+    for(let i=0; i < sIn.length; i++) {
+        let c = sIn[sIn.length-1-i];
+        if (!(c in hist)) {
+            if (i < maxMatchLenThreshold) {
+                return { trimmed: false, data: sIn };
+            }
+            console.debug("DBUG:TrimHistGarbage:TrimmedCharLen:", i);
+            return { trimmed: true, data: sIn.substring(0, sIn.length-i+1) };
+        }
+    }
+    console.debug("DBUG:TrimHistGarbage:Trimmed fully");
+    return { trimmed: true, data: "" };
+}
+
+/**
+ * Keep trimming repeatedly using hist_garbage logic, till you no longer can.
+ * This ensures that even if there are multiple runs of garbage with different patterns,
+ * the logic still tries to munch through them.
+ *
+ * @param {any} sIn
+ * @param {number} maxType
+ * @param {number} maxUniq
+ * @param {number} maxMatchLenThreshold
+ */
+export function trim_hist_garbage_at_end_loop(sIn, maxType, maxUniq, maxMatchLenThreshold) {
+    let sCur = sIn;
+    while (true) {
+        let got = trim_hist_garbage_at_end(sCur, maxType, maxUniq, maxMatchLenThreshold);
+        if (!got.trimmed) {
+            return got.data;
+        }
+        sCur = got.data;
+    }
+}
+
+/**
+ * Try trim garbage at the end by using both the hist-driven-garbage-trimming as well as
+ * skip-a-bit-if-reqd-then-repeat-pattern-based-garbage-trimming, with blind retrying.
+ * @param {string} sIn
+ */
+export function trim_garbage_at_end(sIn) {
+    let sCur = sIn;
+    for(let i=0; i<2; i++) {
+        sCur = trim_hist_garbage_at_end_loop(sCur, 8, 24, 72);
+        sCur = trim_repeat_garbage_at_end_loop(sCur, 32, 72, 12);
+    }
+    return sCur;
+}
+
+
+/**
+ * NewLines array helper.
+ * Allow for maintaining a list of lines.
+ * Allow for a line to be builtup/appended part by part.
+ */
+export class NewLines {
+
+    constructor() {
+        /** @type {string[]} */
+        this.lines = [];
+    }
+
+    /**
+     * Extracts lines from the passed string and inturn either
+     * append to a previous partial line or add a new line.
+     * @param {string} sLines
+     */
+    add_append(sLines) {
+        let aLines = sLines.split("\n");
+        let lCnt = 0;
+        for(let line of aLines) {
+            lCnt += 1;
+            // Add back newline removed if any during split
+            if (lCnt < aLines.length) {
+                line += "\n";
+            } else {
+                if (sLines.endsWith("\n")) {
+                    line += "\n";
+                }
+            }
+            // Append if required
+            if (lCnt == 1) {
+                let lastLine = this.lines[this.lines.length-1];
+                if (lastLine != undefined) {
+                    if (!lastLine.endsWith("\n")) {
+                        this.lines[this.lines.length-1] += line;
+                        continue;
+                    }
+                }
+            }
+            // Add new line
+            this.lines.push(line);
+        }
+    }
+
+    /**
+     * Shift the oldest/earliest/0th line in the array. [Old-New|Earliest-Latest]
+     * Optionally control whether only full lines (ie those with newline at end) will be returned
+     * or will a partial line without a newline at end (can only be the last line) be returned.
+     * @param {boolean} bFullWithNewLineOnly
+     */
+    shift(bFullWithNewLineOnly=true) {
+        let line = this.lines[0];
+        if (line == undefined) {
+            return undefined;
+        }
+        if ((line[line.length-1] != "\n") && bFullWithNewLineOnly){
+            return undefined;
+        }
+        return this.lines.shift();
+    }
+
+}

tools/server/public_simplechat/index.html

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <title>SimpleChat LlamaCppEtal </title>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1" />
+        <meta name="message" content="Save Nature Save Earth" />
+        <meta name="description" content="SimpleChat: trigger LLM web service endpoints /chat/completions and /completions, single/multi chat sessions" />
+        <meta name="author" content="by Humans for All" />
+        <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
+        <script type="importmap">
+            {
+                "imports": {
+                    "datautils": "./datautils.mjs",
+                    "ui": "./ui.mjs"
+                }
+            }
+        </script>
+        <script src="simplechat.js" type="module" defer></script>
+        <link rel="stylesheet" href="simplechat.css" />
+    </head>
+    <body>
+        <div class="samecolumn" id="fullbody">
+
+            <div class="sameline" id="heading">
+                <p class="heading flex-grow" > <b> SimpleChat </b> </p>
+                <button id="settings">Settings</button>
+            </div>
+
+            <div id="sessions-div" class="sameline"></div>
+
+            <hr>
+            <div class="sameline">
+                <label for="system-in">System</label>
+                <textarea name="system" id="system-in" rows="2" placeholder="e.g. you are a helpful ai assistant, who provides concise answers" class="flex-grow"></textarea>
+            </div>
+
+            <hr>
+            <div id="chat-div">
+                <p> You need to have javascript enabled.</p>
+            </div>
+
+            <hr>
+            <div class="sameline">
+                <textarea id="user-in" class="flex-grow" rows="2" placeholder="enter your query to the ai model here" ></textarea>
+                <button id="user-btn">submit</button>
+            </div>
+
+        </div>
+    </body>
+</html>

tools/server/public_simplechat/readme.md

@@ -0,0 +1,286 @@
+
+# SimpleChat
+
+by Humans for All.
+
+## quickstart
+
+To run from the build dir
+
+bin/llama-server -m path/model.gguf --path ../tools/server/public_simplechat
+
+Continue reading for the details.
+
+## overview
+
+This simple web frontend, allows triggering/testing the server's /completions or /chat/completions endpoints
+in a simple way with minimal code from a common code base. Inturn additionally it tries to allow single or
+multiple independent back and forth chatting to an extent, with the ai llm model at a basic level, with their
+own system prompts.
+
+This allows seeing the generated text / ai-model response in oneshot at the end, after it is fully generated,
+or potentially as it is being generated, in a streamed manner from the server/ai-model.
+
+![Chat and Settings screens](./simplechat_screens.webp "Chat and Settings screens")
+
+Auto saves the chat session locally as and when the chat is progressing and inturn at a later time when you
+open SimpleChat, option is provided to restore the old chat session, if a matching one exists.
+
+The UI follows a responsive web design so that the layout can adapt to available display space in a usable
+enough manner, in general.
+
+Allows developer/end-user to control some of the behaviour by updating gMe members from browser's devel-tool
+console. Parallely some of the directly useful to end-user settings can also be changed using the provided
+settings ui.
+
+NOTE: Current web service api doesnt expose the model context length directly, so client logic doesnt provide
+any adaptive culling of old messages nor of replacing them with summary of their content etal. However there
+is a optional sliding window based chat logic, which provides a simple minded culling of old messages from
+the chat history before sending to the ai model.
+
+NOTE: Wrt options sent with the request, it mainly sets temperature, max_tokens and optionaly stream for now.
+However if someone wants they can update the js file or equivalent member in gMe as needed.
+
+NOTE: One may be able to use this to chat with openai api web-service /chat/completions endpoint, in a very
+limited / minimal way. One will need to set model, openai url and authorization bearer key in settings ui.
+
+
+## usage
+
+One could run this web frontend directly using server itself or if anyone is thinking of adding a built in web
+frontend to configure the server over http(s) or so, then run this web frontend using something like python's
+http module.
+
+### running using tools/server
+
+./llama-server -m path/model.gguf --path tools/server/public_simplechat [--port PORT]
+
+### running using python3's server module
+
+first run tools/server
+* ./llama-server -m path/model.gguf
+
+next run this web front end in tools/server/public_simplechat
+* cd ../tools/server/public_simplechat
+* python3 -m http.server PORT
+
+### using the front end
+
+Open this simple web front end from your local browser
+
+* http://127.0.0.1:PORT/index.html
+
+Once inside
+
+* If you want to, you can change many of the default global settings
+  * the base url (ie ip addr / domain name, port)
+  * chat (default) vs completion mode
+  * try trim garbage in response or not
+  * amount of chat history in the context sent to server/ai-model
+  * oneshot or streamed mode.
+
+* In completion mode
+  * one normally doesnt use a system prompt in completion mode.
+  * logic by default doesnt insert any role specific "ROLE: " prefix wrt each role's message.
+    If the model requires any prefix wrt user role messages, then the end user has to
+    explicitly add the needed prefix, when they enter their chat message.
+    Similarly if the model requires any prefix to trigger assistant/ai-model response,
+    then the end user needs to enter the same.
+    This keeps the logic simple, while still giving flexibility to the end user to
+    manage any templating/tagging requirement wrt their messages to the model.
+  * the logic doesnt insert newline at the begining and end wrt the prompt message generated.
+    However if the chat being sent to /completions end point has more than one role's message,
+    then insert newline when moving from one role's message to the next role's message, so
+    that it can be clearly identified/distinguished.
+  * given that /completions endpoint normally doesnt add additional chat-templating of its
+    own, the above ensures that end user can create a custom single/multi message combo with
+    any tags/special-tokens related chat templating to test out model handshake. Or enduser
+    can use it just for normal completion related/based query.
+
+* If you want to provide a system prompt, then ideally enter it first, before entering any user query.
+  Normally Completion mode doesnt need system prompt, while Chat mode can generate better/interesting
+  responses with a suitable system prompt.
+  * if chat.add_system_begin is used
+    * you cant change the system prompt, after it is has been submitted once along with user query.
+    * you cant set a system prompt, after you have submitted any user query
+  * if chat.add_system_anytime is used
+    * one can change the system prompt any time during chat, by changing the contents of system prompt.
+    * inturn the updated/changed system prompt will be inserted into the chat session.
+    * this allows for the subsequent user chatting to be driven by the new system prompt set above.
+
+* Enter your query and either press enter or click on the submit button.
+  If you want to insert enter (\n) as part of your chat/query to ai model, use shift+enter.
+
+* Wait for the logic to communicate with the server and get the response.
+  * the user is not allowed to enter any fresh query during this time.
+  * the user input box will be disabled and a working message will be shown in it.
+  * if trim garbage is enabled, the logic will try to trim repeating text kind of garbage to some extent.
+
+* just refresh the page, to reset wrt the chat history and or system prompt and start afresh.
+
+* Using NewChat one can start independent chat sessions.
+  * two independent chat sessions are setup by default.
+
+* When you want to print, switching ChatHistoryInCtxt to Full and clicking on the chat session button of
+  interest, will display the full chat history till then wrt same, if you want full history for printing.
+
+
+## Devel note
+
+### Reason behind this
+
+The idea is to be easy enough to use for basic purposes, while also being simple and easily discernable
+by developers who may not be from web frontend background (so inturn may not be familiar with template /
+end-use-specific-language-extensions driven flows) so that they can use it to explore/experiment things.
+
+And given that the idea is also to help explore/experiment for developers, some flexibility is provided
+to change behaviour easily using the devel-tools/console or provided minimal settings ui (wrt few aspects).
+Skeletal logic has been implemented to explore some of the end points and ideas/implications around them.
+
+
+### General
+
+Me/gMe consolidates the settings which control the behaviour into one object.
+One can see the current settings, as well as change/update them using browsers devel-tool/console.
+It is attached to the document object. Some of these can also be updated using the Settings UI.
+
+  baseURL - the domain-name/ip-address and inturn the port to send the request.
+
+  bStream - control between oneshot-at-end and live-stream-as-its-generated collating and showing
+  of the generated response.
+
+    the logic assumes that the text sent from the server follows utf-8 encoding.
+
+    in streaming mode - if there is any exception, the logic traps the same and tries to ensure
+    that text generated till then is not lost.
+
+      if a very long text is being generated, which leads to no user interaction for sometime and
+      inturn the machine goes into power saving mode or so, the platform may stop network connection,
+      leading to exception.
+
+  apiEP - select between /completions and /chat/completions endpoint provided by the server/ai-model.
+
+  bCompletionFreshChatAlways - whether Completion mode collates complete/sliding-window history when
+  communicating with the server or only sends the latest user query/message.
+
+  bCompletionInsertStandardRolePrefix - whether Completion mode inserts role related prefix wrt the
+  messages that get inserted into prompt field wrt /Completion endpoint.
+
+  bTrimGarbage - whether garbage repeatation at the end of the generated ai response, should be
+  trimmed or left as is. If enabled, it will be trimmed so that it wont be sent back as part of
+  subsequent chat history. At the same time the actual trimmed text is shown to the user, once
+  when it was generated, so user can check if any useful info/data was there in the response.
+
+    One may be able to request the ai-model to continue (wrt the last response) (if chat-history
+    is enabled as part of the chat-history-in-context setting), and chances are the ai-model will
+    continue starting from the trimmed part, thus allows long response to be recovered/continued
+    indirectly, in many cases.
+
+    The histogram/freq based trimming logic is currently tuned for english language wrt its
+    is-it-a-alpabetic|numeral-char regex match logic.
+
+  apiRequestOptions - maintains the list of options/fields to send along with api request,
+  irrespective of whether /chat/completions or /completions endpoint.
+
+    If you want to add additional options/fields to send to the server/ai-model, and or
+    modify the existing options value or remove them, for now you can update this global var
+    using browser's development-tools/console.
+
+    For string, numeric and boolean fields in apiRequestOptions, including even those added by a
+    user at runtime by directly modifying gMe.apiRequestOptions, setting ui entries will be auto
+    created.
+
+    cache_prompt option supported by example/server is allowed to be controlled by user, so that
+    any caching supported wrt system-prompt and chat history, if usable can get used. When chat
+    history sliding window is enabled, cache_prompt logic may or may not kick in at the backend
+    wrt same, based on aspects related to model, positional encoding, attention mechanism etal.
+    However system prompt should ideally get the benefit of caching.
+
+  headers - maintains the list of http headers sent when request is made to the server. By default
+  Content-Type is set to application/json. Additionally Authorization entry is provided, which can
+  be set if needed using the settings ui.
+
+  iRecentUserMsgCnt - a simple minded SlidingWindow to limit context window load at Ai Model end.
+  This is disabled by default. However if enabled, then in addition to latest system message, only
+  the last/latest iRecentUserMsgCnt user messages after the latest system prompt and its responses
+  from the ai model will be sent to the ai-model, when querying for a new response. IE if enabled,
+  only user messages after the latest system message/prompt will be considered.
+
+    This specified sliding window user message count also includes the latest user query.
+    <0 : Send entire chat history to server
+     0 : Send only the system message if any to the server
+    >0 : Send the latest chat history from the latest system prompt, limited to specified cnt.
+
+
+By using gMe's iRecentUserMsgCnt and apiRequestOptions.max_tokens/n_predict one can try to control
+the implications of loading of the ai-model's context window by chat history, wrt chat response to
+some extent in a simple crude way. You may also want to control the context size enabled when the
+server loads ai-model, on the server end.
+
+
+Sometimes the browser may be stuborn with caching of the file, so your updates to html/css/js
+may not be visible. Also remember that just refreshing/reloading page in browser or for that
+matter clearing site data, dont directly override site caching in all cases. Worst case you may
+have to change port. Or in dev tools of browser, you may be able to disable caching fully.
+
+
+Currently the server to communicate with is maintained globally and not as part of a specific
+chat session. So if one changes the server ip/url in setting, then all chat sessions will auto
+switch to this new server, when you try using those sessions.
+
+
+By switching between chat.add_system_begin/anytime, one can control whether one can change
+the system prompt, anytime during the conversation or only at the beginning.
+
+
+### Default setup
+
+By default things are setup to try and make the user experience a bit better, if possible.
+However a developer when testing the server of ai-model may want to change these value.
+
+Using iRecentUserMsgCnt reduce chat history context sent to the server/ai-model to be
+just the system-prompt, prev-user-request-and-ai-response and cur-user-request, instead of
+full chat history. This way if there is any response with garbage/repeatation, it doesnt
+mess with things beyond the next question/request/query, in some ways. The trim garbage
+option also tries to help avoid issues with garbage in the context to an extent.
+
+Set max_tokens to 1024, so that a relatively large previous reponse doesnt eat up the space
+available wrt next query-response. However dont forget that the server when started should
+also be started with a model context size of 1k or more, to be on safe side.
+
+  The /completions endpoint of tools/server doesnt take max_tokens, instead it takes the
+  internal n_predict, for now add the same here on the client side, maybe later add max_tokens
+  to /completions endpoint handling code on server side.
+
+NOTE: One may want to experiment with frequency/presence penalty fields in apiRequestOptions
+wrt the set of fields sent to server along with the user query, to check how the model behaves
+wrt repeatations in general in the generated text response.
+
+A end-user can change these behaviour by editing gMe from browser's devel-tool/console or by
+using the provided settings ui (for settings exposed through the ui).
+
+
+### OpenAi / Equivalent API WebService
+
+One may be abe to handshake with OpenAI/Equivalent api web service's /chat/completions endpoint
+for a minimal chatting experimentation by setting the below.
+
+* the baseUrl in settings ui
+  * https://api.openai.com/v1 or similar
+
+* Wrt request body - gMe.apiRequestOptions
+  * model (settings ui)
+  * any additional fields if required in future
+
+* Wrt request headers - gMe.headers
+  * Authorization (available through settings ui)
+    * Bearer THE_OPENAI_API_KEY
+  * any additional optional header entries like "OpenAI-Organization", "OpenAI-Project" or so
+
+NOTE: Not tested, as there is no free tier api testing available. However logically this might
+work.
+
+
+## At the end
+
+Also a thank you to all open source and open model developers, who strive for the common good.

tools/server/public_simplechat/simplechat.css

@@ -0,0 +1,79 @@
+/**
+ * the styling of the simplechat web frontend
+ * by Humans for All
+ */
+
+#fullbody {
+    height: 98vh;
+}
+
+.heading {
+    background-color: lightgray;
+}
+
+.session-selected {
+    background-color: lightblue;
+}
+
+.role-system {
+    background-color: lightblue;
+}
+.role-user {
+    background-color: lightgray;
+}
+.role-trim {
+    background-color: lightpink;
+}
+
+.gridx2 {
+    display: grid;
+    grid-template-columns: repeat(2, 1fr);
+    border-bottom-style: dotted;
+    border-bottom-width: thin;
+    border-bottom-color: lightblue;
+}
+
+.flex-grow {
+    flex-grow: 1;
+}
+.float-right {
+    float: right;
+}
+
+#chat-div {
+    overflow: scroll;
+    flex-grow: 1;
+    flex-shrink: 1;
+    min-height: 40vh;
+}
+button {
+    min-width: 8vw;
+}
+
+.sameline {
+    display: flex;
+    flex-direction: row;
+}
+.samecolumn {
+    display: flex;
+    flex-direction: column;
+}
+
+.ul1 {
+    padding-inline-start: 2vw;
+}
+.ul2 {
+    padding-inline-start: 2vw;
+}
+
+* {
+    margin: 0.6vmin;
+}
+
+@media print {
+
+    #fullbody {
+        height: auto;
+    }
+
+}

tools/server/public_simplechat/simplechat.js

@@ -0,0 +1,929 @@
+// @ts-check
+// A simple completions and chat/completions test related web front end logic
+// by Humans for All
+
+import * as du from "./datautils.mjs";
+import * as ui from "./ui.mjs"
+
+class Roles {
+    static System = "system";
+    static User = "user";
+    static Assistant = "assistant";
+}
+
+class ApiEP {
+    static Type = {
+        Chat: "chat",
+        Completion: "completion",
+    }
+    static UrlSuffix = {
+        'chat': `/chat/completions`,
+        'completion': `/completions`,
+    }
+
+    /**
+     * Build the url from given baseUrl and apiEp id.
+     * @param {string} baseUrl
+     * @param {string} apiEP
+     */
+    static Url(baseUrl, apiEP) {
+        if (baseUrl.endsWith("/")) {
+            baseUrl = baseUrl.substring(0, baseUrl.length-1);
+        }
+        return `${baseUrl}${this.UrlSuffix[apiEP]}`;
+    }
+
+}
+
+
+let gUsageMsg = `
+    <p class="role-system">Usage</p>
+    <ul class="ul1">
+    <li> System prompt above, to try control ai response characteristics.</li>
+        <ul class="ul2">
+        <li> Completion mode - no system prompt normally.</li>
+        </ul>
+    <li> Use shift+enter for inserting enter/newline.</li>
+    <li> Enter your query to ai assistant below.</li>
+    <li> Default ContextWindow = [System, Last Query+Resp, Cur Query].</li>
+        <ul class="ul2">
+        <li> ChatHistInCtxt, MaxTokens, ModelCtxt window to expand</li>
+        </ul>
+    </ul>
+`;
+
+
+/** @typedef {{role: string, content: string}[]} ChatMessages */
+
+/** @typedef {{iLastSys: number, xchat: ChatMessages}} SimpleChatODS */
+
+class SimpleChat {
+
+    /**
+     * @param {string} chatId
+     */
+    constructor(chatId) {
+        this.chatId = chatId;
+        /**
+         * Maintain in a form suitable for common LLM web service chat/completions' messages entry
+         * @type {ChatMessages}
+         */
+        this.xchat = [];
+        this.iLastSys = -1;
+        this.latestResponse = "";
+    }
+
+    clear() {
+        this.xchat = [];
+        this.iLastSys = -1;
+    }
+
+    ods_key() {
+        return `SimpleChat-${this.chatId}`
+    }
+
+    save() {
+        /** @type {SimpleChatODS} */
+        let ods = {iLastSys: this.iLastSys, xchat: this.xchat};
+        localStorage.setItem(this.ods_key(), JSON.stringify(ods));
+    }
+
+    load() {
+        let sods = localStorage.getItem(this.ods_key());
+        if (sods == null) {
+            return;
+        }
+        /** @type {SimpleChatODS} */
+        let ods = JSON.parse(sods);
+        this.iLastSys = ods.iLastSys;
+        this.xchat = ods.xchat;
+    }
+
+    /**
+     * Recent chat messages.
+     * If iRecentUserMsgCnt < 0
+     *   Then return the full chat history
+     * Else
+     *   Return chat messages from latest going back till the last/latest system prompt.
+     *   While keeping track that the number of user queries/messages doesnt exceed iRecentUserMsgCnt.
+     * @param {number} iRecentUserMsgCnt
+     */
+    recent_chat(iRecentUserMsgCnt) {
+        if (iRecentUserMsgCnt < 0) {
+            return this.xchat;
+        }
+        if (iRecentUserMsgCnt == 0) {
+            console.warn("WARN:SimpleChat:SC:RecentChat:iRecentUsermsgCnt of 0 means no user message/query sent");
+        }
+        /** @type{ChatMessages} */
+        let rchat = [];
+        let sysMsg = this.get_system_latest();
+        if (sysMsg.length != 0) {
+            rchat.push({role: Roles.System, content: sysMsg});
+        }
+        let iUserCnt = 0;
+        let iStart = this.xchat.length;
+        for(let i=this.xchat.length-1; i > this.iLastSys; i--) {
+            if (iUserCnt >= iRecentUserMsgCnt) {
+                break;
+            }
+            let msg = this.xchat[i];
+            if (msg.role == Roles.User) {
+                iStart = i;
+                iUserCnt += 1;
+            }
+        }
+        for(let i = iStart; i < this.xchat.length; i++) {
+            let msg = this.xchat[i];
+            if (msg.role == Roles.System) {
+                continue;
+            }
+            rchat.push({role: msg.role, content: msg.content});
+        }
+        return rchat;
+    }
+
+    /**
+     * Collate the latest response from the server/ai-model, as it is becoming available.
+     * This is mainly useful for the stream mode.
+     * @param {string} content
+     */
+    append_response(content) {
+        this.latestResponse += content;
+    }
+
+    /**
+     * Add an entry into xchat
+     * @param {string} role
+     * @param {string|undefined|null} content
+     */
+    add(role, content) {
+        if ((content == undefined) || (content == null) || (content == "")) {
+            return false;
+        }
+        this.xchat.push( {role: role, content: content} );
+        if (role == Roles.System) {
+            this.iLastSys = this.xchat.length - 1;
+        }
+        this.save();
+        return true;
+    }
+
+    /**
+     * Show the contents in the specified div
+     * @param {HTMLDivElement} div
+     * @param {boolean} bClear
+     */
+    show(div, bClear=true) {
+        if (bClear) {
+            div.replaceChildren();
+        }
+        let last = undefined;
+        for(const x of this.recent_chat(gMe.iRecentUserMsgCnt)) {
+            let entry = ui.el_create_append_p(`${x.role}: ${x.content}`, div);
+            entry.className = `role-${x.role}`;
+            last = entry;
+        }
+        if (last !== undefined) {
+            last.scrollIntoView(false);
+        } else {
+            if (bClear) {
+                div.innerHTML = gUsageMsg;
+                gMe.setup_load(div, this);
+                gMe.show_info(div);
+            }
+        }
+        return last;
+    }
+
+    /**
+     * Setup the fetch headers.
+     * It picks the headers from gMe.headers.
+     * It inserts Authorization only if its non-empty.
+     * @param {string} apiEP
+     */
+    fetch_headers(apiEP) {
+        let headers = new Headers();
+        for(let k in gMe.headers) {
+            let v = gMe.headers[k];
+            if ((k == "Authorization") && (v.trim() == "")) {
+                continue;
+            }
+            headers.append(k, v);
+        }
+        return headers;
+    }
+
+    /**
+     * Add needed fields wrt json object to be sent wrt LLM web services completions endpoint.
+     * The needed fields/options are picked from a global object.
+     * Add optional stream flag, if required.
+     * Convert the json into string.
+     * @param {Object} obj
+     */
+    request_jsonstr_extend(obj) {
+        for(let k in gMe.apiRequestOptions) {
+            obj[k] = gMe.apiRequestOptions[k];
+        }
+        if (gMe.bStream) {
+            obj["stream"] = true;
+        }
+        return JSON.stringify(obj);
+    }
+
+    /**
+     * Return a string form of json object suitable for chat/completions
+     */
+    request_messages_jsonstr() {
+        let req = {
+            messages: this.recent_chat(gMe.iRecentUserMsgCnt),
+        }
+        return this.request_jsonstr_extend(req);
+    }
+
+    /**
+     * Return a string form of json object suitable for /completions
+     * @param {boolean} bInsertStandardRolePrefix Insert "<THE_ROLE>: " as prefix wrt each role's message
+     */
+    request_prompt_jsonstr(bInsertStandardRolePrefix) {
+        let prompt = "";
+        let iCnt = 0;
+        for(const chat of this.recent_chat(gMe.iRecentUserMsgCnt)) {
+            iCnt += 1;
+            if (iCnt > 1) {
+                prompt += "\n";
+            }
+            if (bInsertStandardRolePrefix) {
+                prompt += `${chat.role}: `;
+            }
+            prompt += `${chat.content}`;
+        }
+        let req = {
+            prompt: prompt,
+        }
+        return this.request_jsonstr_extend(req);
+    }
+
+    /**
+     * Return a string form of json object suitable for specified api endpoint.
+     * @param {string} apiEP
+     */
+    request_jsonstr(apiEP) {
+        if (apiEP == ApiEP.Type.Chat) {
+            return this.request_messages_jsonstr();
+        } else {
+            return this.request_prompt_jsonstr(gMe.bCompletionInsertStandardRolePrefix);
+        }
+    }
+
+    /**
+     * Extract the ai-model/assistant's response from the http response got.
+     * Optionally trim the message wrt any garbage at the end.
+     * @param {any} respBody
+     * @param {string} apiEP
+     */
+    response_extract(respBody, apiEP) {
+        let assistant = "";
+        if (apiEP == ApiEP.Type.Chat) {
+            assistant = respBody["choices"][0]["message"]["content"];
+        } else {
+            try {
+                assistant = respBody["choices"][0]["text"];
+            } catch {
+                assistant = respBody["content"];
+            }
+        }
+        return assistant;
+    }
+
+    /**
+     * Extract the ai-model/assistant's response from the http response got in streaming mode.
+     * @param {any} respBody
+     * @param {string} apiEP
+     */
+    response_extract_stream(respBody, apiEP) {
+        let assistant = "";
+        if (apiEP == ApiEP.Type.Chat) {
+            if (respBody["choices"][0]["finish_reason"] !== "stop") {
+                assistant = respBody["choices"][0]["delta"]["content"];
+            }
+        } else {
+            try {
+                assistant = respBody["choices"][0]["text"];
+            } catch {
+                assistant = respBody["content"];
+            }
+        }
+        return assistant;
+    }
+
+    /**
+     * Allow setting of system prompt, but only at begining.
+     * @param {string} sysPrompt
+     * @param {string} msgTag
+     */
+    add_system_begin(sysPrompt, msgTag) {
+        if (this.xchat.length == 0) {
+            if (sysPrompt.length > 0) {
+                return this.add(Roles.System, sysPrompt);
+            }
+        } else {
+            if (sysPrompt.length > 0) {
+                if (this.xchat[0].role !== Roles.System) {
+                    console.error(`ERRR:SimpleChat:SC:${msgTag}:You need to specify system prompt before any user query, ignoring...`);
+                } else {
+                    if (this.xchat[0].content !== sysPrompt) {
+                        console.error(`ERRR:SimpleChat:SC:${msgTag}:You cant change system prompt, mid way through, ignoring...`);
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Allow setting of system prompt, at any time.
+     * @param {string} sysPrompt
+     * @param {string} msgTag
+     */
+    add_system_anytime(sysPrompt, msgTag) {
+        if (sysPrompt.length <= 0) {
+            return false;
+        }
+
+        if (this.iLastSys < 0) {
+            return this.add(Roles.System, sysPrompt);
+        }
+
+        let lastSys = this.xchat[this.iLastSys].content;
+        if (lastSys !== sysPrompt) {
+            return this.add(Roles.System, sysPrompt);
+        }
+        return false;
+    }
+
+    /**
+     * Retrieve the latest system prompt.
+     */
+    get_system_latest() {
+        if (this.iLastSys == -1) {
+            return "";
+        }
+        let sysPrompt = this.xchat[this.iLastSys].content;
+        return sysPrompt;
+    }
+
+
+    /**
+     * Handle the multipart response from server/ai-model
+     * @param {Response} resp
+     * @param {string} apiEP
+     * @param {HTMLDivElement} elDiv
+     */
+    async handle_response_multipart(resp, apiEP, elDiv) {
+        let elP = ui.el_create_append_p("", elDiv);
+        if (!resp.body) {
+            throw Error("ERRR:SimpleChat:SC:HandleResponseMultiPart:No body...");
+        }
+        let tdUtf8 = new TextDecoder("utf-8");
+        let rr = resp.body.getReader();
+        this.latestResponse = "";
+        let xLines = new du.NewLines();
+        while(true) {
+            let { value: cur,  done: done } = await rr.read();
+            if (cur) {
+                let curBody = tdUtf8.decode(cur, {stream: true});
+                console.debug("DBUG:SC:PART:Str:", curBody);
+                xLines.add_append(curBody);
+            }
+            while(true) {
+                let curLine = xLines.shift(!done);
+                if (curLine == undefined) {
+                    break;
+                }
+                if (curLine.trim() == "") {
+                    continue;
+                }
+                if (curLine.startsWith("data:")) {
+                    curLine = curLine.substring(5);
+                }
+                if (curLine.trim() === "[DONE]") {
+                    break;
+                }
+                let curJson = JSON.parse(curLine);
+                console.debug("DBUG:SC:PART:Json:", curJson);
+                this.append_response(this.response_extract_stream(curJson, apiEP));
+            }
+            elP.innerText = this.latestResponse;
+            elP.scrollIntoView(false);
+            if (done) {
+                break;
+            }
+        }
+        console.debug("DBUG:SC:PART:Full:", this.latestResponse);
+        return this.latestResponse;
+    }
+
+    /**
+     * Handle the oneshot response from server/ai-model
+     * @param {Response} resp
+     * @param {string} apiEP
+     */
+    async handle_response_oneshot(resp, apiEP) {
+        let respBody = await resp.json();
+        console.debug(`DBUG:SimpleChat:SC:${this.chatId}:HandleUserSubmit:RespBody:${JSON.stringify(respBody)}`);
+        return this.response_extract(respBody, apiEP);
+    }
+
+    /**
+     * Handle the response from the server be it in oneshot or multipart/stream mode.
+     * Also take care of the optional garbage trimming.
+     * @param {Response} resp
+     * @param {string} apiEP
+     * @param {HTMLDivElement} elDiv
+     */
+    async handle_response(resp, apiEP, elDiv) {
+        let theResp = {
+            assistant: "",
+            trimmed: "",
+        }
+        if (gMe.bStream) {
+            try {
+                theResp.assistant = await this.handle_response_multipart(resp, apiEP, elDiv);
+                this.latestResponse = "";
+            } catch (error) {
+                theResp.assistant = this.latestResponse;
+                this.add(Roles.Assistant, theResp.assistant);
+                this.latestResponse = "";
+                throw error;
+            }
+        } else {
+            theResp.assistant = await this.handle_response_oneshot(resp, apiEP);
+        }
+        if (gMe.bTrimGarbage) {
+            let origMsg = theResp.assistant;
+            theResp.assistant = du.trim_garbage_at_end(origMsg);
+            theResp.trimmed = origMsg.substring(theResp.assistant.length);
+        }
+        this.add(Roles.Assistant, theResp.assistant);
+        return theResp;
+    }
+
+}
+
+
+class MultiChatUI {
+
+    constructor() {
+        /** @type {Object<string, SimpleChat>} */
+        this.simpleChats = {};
+        /** @type {string} */
+        this.curChatId = "";
+
+        // the ui elements
+        this.elInSystem = /** @type{HTMLInputElement} */(document.getElementById("system-in"));
+        this.elDivChat = /** @type{HTMLDivElement} */(document.getElementById("chat-div"));
+        this.elBtnUser = /** @type{HTMLButtonElement} */(document.getElementById("user-btn"));
+        this.elInUser = /** @type{HTMLInputElement} */(document.getElementById("user-in"));
+        this.elDivHeading = /** @type{HTMLSelectElement} */(document.getElementById("heading"));
+        this.elDivSessions = /** @type{HTMLDivElement} */(document.getElementById("sessions-div"));
+        this.elBtnSettings = /** @type{HTMLButtonElement} */(document.getElementById("settings"));
+
+        this.validate_element(this.elInSystem, "system-in");
+        this.validate_element(this.elDivChat, "chat-div");
+        this.validate_element(this.elInUser, "user-in");
+        this.validate_element(this.elDivHeading, "heading");
+        this.validate_element(this.elDivChat, "sessions-div");
+        this.validate_element(this.elBtnSettings, "settings");
+    }
+
+    /**
+     * Check if the element got
+     * @param {HTMLElement | null} el
+     * @param {string} msgTag
+     */
+    validate_element(el, msgTag) {
+        if (el == null) {
+            throw Error(`ERRR:SimpleChat:MCUI:${msgTag} element missing in html...`);
+        } else {
+            console.debug(`INFO:SimpleChat:MCUI:${msgTag} Id[${el.id}] Name[${el["name"]}]`);
+        }
+    }
+
+    /**
+     * Reset user input ui.
+     * * clear user input
+     * * enable user input
+     * * set focus to user input
+     */
+    ui_reset_userinput() {
+        this.elInUser.value = "";
+        this.elInUser.disabled = false;
+        this.elInUser.focus();
+    }
+
+    /**
+     * Setup the needed callbacks wrt UI, curChatId to defaultChatId and
+     * optionally switch to specified defaultChatId.
+     * @param {string} defaultChatId
+     * @param {boolean} bSwitchSession
+     */
+    setup_ui(defaultChatId, bSwitchSession=false) {
+
+        this.curChatId = defaultChatId;
+        if (bSwitchSession) {
+            this.handle_session_switch(this.curChatId);
+        }
+
+        this.elBtnSettings.addEventListener("click", (ev)=>{
+            this.elDivChat.replaceChildren();
+            gMe.show_settings(this.elDivChat);
+        });
+
+        this.elBtnUser.addEventListener("click", (ev)=>{
+            if (this.elInUser.disabled) {
+                return;
+            }
+            this.handle_user_submit(this.curChatId, gMe.apiEP).catch((/** @type{Error} */reason)=>{
+                let msg = `ERRR:SimpleChat\nMCUI:HandleUserSubmit:${this.curChatId}\n${reason.name}:${reason.message}`;
+                console.error(msg.replace("\n", ":"));
+                alert(msg);
+                this.ui_reset_userinput();
+            });
+        });
+
+        this.elInUser.addEventListener("keyup", (ev)=> {
+            // allow user to insert enter into their message using shift+enter.
+            // while just pressing enter key will lead to submitting.
+            if ((ev.key === "Enter") && (!ev.shiftKey)) {
+                let value = this.elInUser.value;
+                this.elInUser.value = value.substring(0,value.length-1);
+                this.elBtnUser.click();
+                ev.preventDefault();
+            }
+        });
+
+        this.elInSystem.addEventListener("keyup", (ev)=> {
+            // allow user to insert enter into the system prompt using shift+enter.
+            // while just pressing enter key will lead to setting the system prompt.
+            if ((ev.key === "Enter") && (!ev.shiftKey)) {
+                let value = this.elInSystem.value;
+                this.elInSystem.value = value.substring(0,value.length-1);
+                let chat = this.simpleChats[this.curChatId];
+                chat.add_system_anytime(this.elInSystem.value, this.curChatId);
+                chat.show(this.elDivChat);
+                ev.preventDefault();
+            }
+        });
+
+    }
+
+    /**
+     * Setup a new chat session and optionally switch to it.
+     * @param {string} chatId
+     * @param {boolean} bSwitchSession
+     */
+    new_chat_session(chatId, bSwitchSession=false) {
+        this.simpleChats[chatId] = new SimpleChat(chatId);
+        if (bSwitchSession) {
+            this.handle_session_switch(chatId);
+        }
+    }
+
+
+    /**
+     * Handle user query submit request, wrt specified chat session.
+     * @param {string} chatId
+     * @param {string} apiEP
+     */
+    async handle_user_submit(chatId, apiEP) {
+
+        let chat = this.simpleChats[chatId];
+
+        // In completion mode, if configured, clear any previous chat history.
+        // So if user wants to simulate a multi-chat based completion query,
+        // they will have to enter the full thing, as a suitable multiline
+        // user input/query.
+        if ((apiEP == ApiEP.Type.Completion) && (gMe.bCompletionFreshChatAlways)) {
+            chat.clear();
+        }
+
+        chat.add_system_anytime(this.elInSystem.value, chatId);
+
+        let content = this.elInUser.value;
+        if (!chat.add(Roles.User, content)) {
+            console.debug(`WARN:SimpleChat:MCUI:${chatId}:HandleUserSubmit:Ignoring empty user input...`);
+            return;
+        }
+        chat.show(this.elDivChat);
+
+        let theUrl = ApiEP.Url(gMe.baseURL, apiEP);
+        let theBody = chat.request_jsonstr(apiEP);
+
+        this.elInUser.value = "working...";
+        this.elInUser.disabled = true;
+        console.debug(`DBUG:SimpleChat:MCUI:${chatId}:HandleUserSubmit:${theUrl}:ReqBody:${theBody}`);
+        let theHeaders = chat.fetch_headers(apiEP);
+        let resp = await fetch(theUrl, {
+            method: "POST",
+            headers: theHeaders,
+            body: theBody,
+        });
+
+        let theResp = await chat.handle_response(resp, apiEP, this.elDivChat);
+        if (chatId == this.curChatId) {
+            chat.show(this.elDivChat);
+            if (theResp.trimmed.length > 0) {
+                let p = ui.el_create_append_p(`TRIMMED:${theResp.trimmed}`, this.elDivChat);
+                p.className="role-trim";
+            }
+        } else {
+            console.debug(`DBUG:SimpleChat:MCUI:HandleUserSubmit:ChatId has changed:[${chatId}] [${this.curChatId}]`);
+        }
+        this.ui_reset_userinput();
+    }
+
+    /**
+     * Show buttons for NewChat and available chat sessions, in the passed elDiv.
+     * If elDiv is undefined/null, then use this.elDivSessions.
+     * Take care of highlighting the selected chat-session's btn.
+     * @param {HTMLDivElement | undefined} elDiv
+     */
+    show_sessions(elDiv=undefined) {
+        if (!elDiv) {
+            elDiv = this.elDivSessions;
+        }
+        elDiv.replaceChildren();
+        // Btn for creating new chat session
+        let btnNew = ui.el_create_button("New CHAT", (ev)=> {
+            if (this.elInUser.disabled) {
+                console.error(`ERRR:SimpleChat:MCUI:NewChat:Current session [${this.curChatId}] awaiting response, ignoring request...`);
+                alert("ERRR:SimpleChat\nMCUI:NewChat\nWait for response to pending query, before starting new chat session");
+                return;
+            }
+            let chatId = `Chat${Object.keys(this.simpleChats).length}`;
+            let chatIdGot = prompt("INFO:SimpleChat\nMCUI:NewChat\nEnter id for new chat session", chatId);
+            if (!chatIdGot) {
+                console.error("ERRR:SimpleChat:MCUI:NewChat:Skipping based on user request...");
+                return;
+            }
+            this.new_chat_session(chatIdGot, true);
+            this.create_session_btn(elDiv, chatIdGot);
+            ui.el_children_config_class(elDiv, chatIdGot, "session-selected", "");
+        });
+        elDiv.appendChild(btnNew);
+        // Btns for existing chat sessions
+        let chatIds = Object.keys(this.simpleChats);
+        for(let cid of chatIds) {
+            let btn = this.create_session_btn(elDiv, cid);
+            if (cid == this.curChatId) {
+                btn.className = "session-selected";
+            }
+        }
+    }
+
+    create_session_btn(elDiv, cid) {
+        let btn = ui.el_create_button(cid, (ev)=>{
+            let target = /** @type{HTMLButtonElement} */(ev.target);
+            console.debug(`DBUG:SimpleChat:MCUI:SessionClick:${target.id}`);
+            if (this.elInUser.disabled) {
+                console.error(`ERRR:SimpleChat:MCUI:SessionClick:${target.id}:Current session [${this.curChatId}] awaiting response, ignoring switch...`);
+                alert("ERRR:SimpleChat\nMCUI:SessionClick\nWait for response to pending query, before switching");
+                return;
+            }
+            this.handle_session_switch(target.id);
+            ui.el_children_config_class(elDiv, target.id, "session-selected", "");
+        });
+        elDiv.appendChild(btn);
+        return btn;
+    }
+
+    /**
+     * Switch ui to the specified chatId and set curChatId to same.
+     * @param {string} chatId
+     */
+    async handle_session_switch(chatId) {
+        let chat = this.simpleChats[chatId];
+        if (chat == undefined) {
+            console.error(`ERRR:SimpleChat:MCUI:HandleSessionSwitch:${chatId} missing...`);
+            return;
+        }
+        this.elInSystem.value = chat.get_system_latest();
+        this.elInUser.value = "";
+        chat.show(this.elDivChat);
+        this.elInUser.focus();
+        this.curChatId = chatId;
+        console.log(`INFO:SimpleChat:MCUI:HandleSessionSwitch:${chatId} entered...`);
+    }
+
+}
+
+
+class Me {
+
+    constructor() {
+        this.baseURL = "http://127.0.0.1:8080";
+        this.defaultChatIds = [ "Default", "Other" ];
+        this.multiChat = new MultiChatUI();
+        this.bStream = true;
+        this.bCompletionFreshChatAlways = true;
+        this.bCompletionInsertStandardRolePrefix = false;
+        this.bTrimGarbage = true;
+        this.iRecentUserMsgCnt = 2;
+        this.sRecentUserMsgCnt = {
+            "Full": -1,
+            "Last0": 1,
+            "Last1": 2,
+            "Last2": 3,
+            "Last4": 5,
+        };
+        this.apiEP = ApiEP.Type.Chat;
+        this.headers = {
+            "Content-Type": "application/json",
+            "Authorization": "", // Authorization: Bearer OPENAI_API_KEY
+        }
+        // Add needed fields wrt json object to be sent wrt LLM web services completions endpoint.
+        this.apiRequestOptions = {
+            "model": "gpt-3.5-turbo",
+            "temperature": 0.7,
+            "max_tokens": 1024,
+            "n_predict": 1024,
+            "cache_prompt": false,
+            //"frequency_penalty": 1.2,
+            //"presence_penalty": 1.2,
+        };
+    }
+
+    /**
+     * Disable console.debug by mapping it to a empty function.
+     */
+    debug_disable() {
+        this.console_debug = console.debug;
+        console.debug = () => {
+
+        };
+    }
+
+    /**
+     * Setup the load saved chat ui.
+     * @param {HTMLDivElement} div
+     * @param {SimpleChat} chat
+     */
+    setup_load(div, chat) {
+        if (!(chat.ods_key() in localStorage)) {
+            return;
+        }
+        div.innerHTML += `<p class="role-system">Restore</p>
+        <p>Load previously saved chat session, if available</p>`;
+        let btn = ui.el_create_button(chat.ods_key(), (ev)=>{
+            console.log("DBUG:SimpleChat:SC:Load", chat);
+            chat.load();
+            queueMicrotask(()=>{
+                chat.show(div);
+                this.multiChat.elInSystem.value = chat.get_system_latest();
+            });
+        });
+        div.appendChild(btn);
+    }
+
+    /**
+     * Show the configurable parameters info in the passed Div element.
+     * @param {HTMLDivElement} elDiv
+     * @param {boolean} bAll
+     */
+    show_info(elDiv, bAll=false) {
+
+        let p = ui.el_create_append_p("Settings (devel-tools-console document[gMe])", elDiv);
+        p.className = "role-system";
+
+        if (bAll) {
+
+            ui.el_create_append_p(`baseURL:${this.baseURL}`, elDiv);
+
+            ui.el_create_append_p(`Authorization:${this.headers["Authorization"]}`, elDiv);
+
+            ui.el_create_append_p(`bStream:${this.bStream}`, elDiv);
+
+            ui.el_create_append_p(`bTrimGarbage:${this.bTrimGarbage}`, elDiv);
+
+            ui.el_create_append_p(`ApiEndPoint:${this.apiEP}`, elDiv);
+
+            ui.el_create_append_p(`iRecentUserMsgCnt:${this.iRecentUserMsgCnt}`, elDiv);
+
+            ui.el_create_append_p(`bCompletionFreshChatAlways:${this.bCompletionFreshChatAlways}`, elDiv);
+
+            ui.el_create_append_p(`bCompletionInsertStandardRolePrefix:${this.bCompletionInsertStandardRolePrefix}`, elDiv);
+
+        }
+
+        ui.el_create_append_p(`apiRequestOptions:${JSON.stringify(this.apiRequestOptions, null, " - ")}`, elDiv);
+        ui.el_create_append_p(`headers:${JSON.stringify(this.headers, null, " - ")}`, elDiv);
+
+    }
+
+    /**
+     * Auto create ui input elements for fields in apiRequestOptions
+     * Currently supports text and number field types.
+     * @param {HTMLDivElement} elDiv
+     */
+    show_settings_apirequestoptions(elDiv) {
+        let typeDict = {
+            "string": "text",
+            "number": "number",
+        };
+        let fs = document.createElement("fieldset");
+        let legend = document.createElement("legend");
+        legend.innerText = "ApiRequestOptions";
+        fs.appendChild(legend);
+        elDiv.appendChild(fs);
+        for(const k in this.apiRequestOptions) {
+            let val = this.apiRequestOptions[k];
+            let type = typeof(val);
+            if (((type == "string") || (type == "number"))) {
+                let inp = ui.el_creatediv_input(`Set${k}`, k, typeDict[type], this.apiRequestOptions[k], (val)=>{
+                    if (type == "number") {
+                        val = Number(val);
+                    }
+                    this.apiRequestOptions[k] = val;
+                });
+                fs.appendChild(inp.div);
+            } else if (type == "boolean") {
+                let bbtn = ui.el_creatediv_boolbutton(`Set{k}`, k, {true: "true", false: "false"}, val, (userVal)=>{
+                    this.apiRequestOptions[k] = userVal;
+                });
+                fs.appendChild(bbtn.div);
+            }
+        }
+    }
+
+    /**
+     * Show settings ui for configurable parameters, in the passed Div element.
+     * @param {HTMLDivElement} elDiv
+     */
+    show_settings(elDiv) {
+
+        let inp = ui.el_creatediv_input("SetBaseURL", "BaseURL", "text", this.baseURL, (val)=>{
+            this.baseURL = val;
+        });
+        elDiv.appendChild(inp.div);
+
+        inp = ui.el_creatediv_input("SetAuthorization", "Authorization", "text", this.headers["Authorization"], (val)=>{
+            this.headers["Authorization"] = val;
+        });
+        inp.el.placeholder = "Bearer OPENAI_API_KEY";
+        elDiv.appendChild(inp.div);
+
+        let bb = ui.el_creatediv_boolbutton("SetStream", "Stream", {true: "[+] yes stream", false: "[-] do oneshot"}, this.bStream, (val)=>{
+            this.bStream = val;
+        });
+        elDiv.appendChild(bb.div);
+
+        bb = ui.el_creatediv_boolbutton("SetTrimGarbage", "TrimGarbage", {true: "[+] yes trim", false: "[-] dont trim"}, this.bTrimGarbage, (val)=>{
+            this.bTrimGarbage = val;
+        });
+        elDiv.appendChild(bb.div);
+
+        this.show_settings_apirequestoptions(elDiv);
+
+        let sel = ui.el_creatediv_select("SetApiEP", "ApiEndPoint", ApiEP.Type, this.apiEP, (val)=>{
+            this.apiEP = ApiEP.Type[val];
+        });
+        elDiv.appendChild(sel.div);
+
+        sel = ui.el_creatediv_select("SetChatHistoryInCtxt", "ChatHistoryInCtxt", this.sRecentUserMsgCnt, this.iRecentUserMsgCnt, (val)=>{
+            this.iRecentUserMsgCnt = this.sRecentUserMsgCnt[val];
+        });
+        elDiv.appendChild(sel.div);
+
+        bb = ui.el_creatediv_boolbutton("SetCompletionFreshChatAlways", "CompletionFreshChatAlways", {true: "[+] yes fresh", false: "[-] no, with history"}, this.bCompletionFreshChatAlways, (val)=>{
+            this.bCompletionFreshChatAlways = val;
+        });
+        elDiv.appendChild(bb.div);
+
+        bb = ui.el_creatediv_boolbutton("SetCompletionInsertStandardRolePrefix", "CompletionInsertStandardRolePrefix", {true: "[+] yes insert", false: "[-] dont insert"}, this.bCompletionInsertStandardRolePrefix, (val)=>{
+            this.bCompletionInsertStandardRolePrefix = val;
+        });
+        elDiv.appendChild(bb.div);
+
+    }
+
+}
+
+
+/** @type {Me} */
+let gMe;
+
+function startme() {
+    console.log("INFO:SimpleChat:StartMe:Starting...");
+    gMe = new Me();
+    gMe.debug_disable();
+    document["gMe"] = gMe;
+    document["du"] = du;
+    for (let cid of gMe.defaultChatIds) {
+        gMe.multiChat.new_chat_session(cid);
+    }
+    gMe.multiChat.setup_ui(gMe.defaultChatIds[0], true);
+    gMe.multiChat.show_sessions();
+}
+
+document.addEventListener("DOMContentLoaded", startme);

tools/server/public_simplechat/ui.mjs

@@ -0,0 +1,211 @@
+//@ts-check
+// Helpers to work with html elements
+// by Humans for All
+//
+
+
+/**
+ * Set the class of the children, based on whether it is the idSelected or not.
+ * @param {HTMLDivElement} elBase
+ * @param {string} idSelected
+ * @param {string} classSelected
+ * @param {string} classUnSelected
+ */
+export function el_children_config_class(elBase, idSelected, classSelected, classUnSelected="") {
+    for(let child of elBase.children) {
+        if (child.id == idSelected) {
+            child.className = classSelected;
+        } else {
+            child.className = classUnSelected;
+        }
+    }
+}
+
+/**
+ * Create button and set it up.
+ * @param {string} id
+ * @param {(this: HTMLButtonElement, ev: MouseEvent) => any} callback
+ * @param {string | undefined} name
+ * @param {string | undefined} innerText
+ */
+export function el_create_button(id, callback, name=undefined, innerText=undefined) {
+    if (!name) {
+        name = id;
+    }
+    if (!innerText) {
+        innerText = id;
+    }
+    let btn = document.createElement("button");
+    btn.id = id;
+    btn.name = name;
+    btn.innerText = innerText;
+    btn.addEventListener("click", callback);
+    return btn;
+}
+
+/**
+ * Create a para and set it up. Optionaly append it to a passed parent.
+ * @param {string} text
+ * @param {HTMLElement | undefined} elParent
+ * @param {string | undefined} id
+ */
+export function el_create_append_p(text, elParent=undefined, id=undefined) {
+    let para = document.createElement("p");
+    para.innerText = text;
+    if (id) {
+        para.id = id;
+    }
+    if (elParent) {
+        elParent.appendChild(para);
+    }
+    return para;
+}
+
+/**
+ * Create a button which represents bool value using specified text wrt true and false.
+ * When ever user clicks the button, it will toggle the value and update the shown text.
+ *
+ * @param {string} id
+ * @param {{true: string, false: string}} texts
+ * @param {boolean} defaultValue
+ * @param {function(boolean):void} cb
+ */
+export function el_create_boolbutton(id, texts, defaultValue, cb) {
+    let el = document.createElement("button");
+    el["xbool"] = defaultValue;
+    el["xtexts"] = structuredClone(texts);
+    el.innerText = el["xtexts"][String(defaultValue)];
+    if (id) {
+        el.id = id;
+    }
+    el.addEventListener('click', (ev)=>{
+        el["xbool"] = !el["xbool"];
+        el.innerText = el["xtexts"][String(el["xbool"])];
+        cb(el["xbool"]);
+    })
+    return el;
+}
+
+/**
+ * Create a div wrapped button which represents bool value using specified text wrt true and false.
+ * @param {string} id
+ * @param {string} label
+ * @param {{ true: string; false: string; }} texts
+ * @param {boolean} defaultValue
+ * @param {(arg0: boolean) => void} cb
+ * @param {string} className
+ */
+export function el_creatediv_boolbutton(id, label, texts, defaultValue, cb, className="gridx2") {
+    let div = document.createElement("div");
+    div.className = className;
+    let lbl = document.createElement("label");
+    lbl.setAttribute("for", id);
+    lbl.innerText = label;
+    div.appendChild(lbl);
+    let btn = el_create_boolbutton(id, texts, defaultValue, cb);
+    div.appendChild(btn);
+    return { div: div, el: btn };
+}
+
+
+/**
+ * Create a select ui element, with a set of options to select from.
+ * * options: an object which contains name-value pairs
+ * * defaultOption: the value whose name should be choosen, by default.
+ * * cb : the call back returns the name string of the option selected.
+ *
+ * @param {string} id
+ * @param {Object<string,*>} options
+ * @param {*} defaultOption
+ * @param {function(string):void} cb
+ */
+export function el_create_select(id, options, defaultOption, cb) {
+    let el = document.createElement("select");
+    el["xselected"] = defaultOption;
+    el["xoptions"] = structuredClone(options);
+    for(let cur of Object.keys(options)) {
+        let op = document.createElement("option");
+        op.value = cur;
+        op.innerText = cur;
+        if (options[cur] == defaultOption) {
+            op.selected = true;
+        }
+        el.appendChild(op);
+    }
+    if (id) {
+        el.id = id;
+        el.name = id;
+    }
+    el.addEventListener('change', (ev)=>{
+        let target = /** @type{HTMLSelectElement} */(ev.target);
+        console.log("DBUG:UI:Select:", id, ":", target.value);
+        cb(target.value);
+    })
+    return el;
+}
+
+/**
+ * Create a div wrapped select ui element, with a set of options to select from.
+ *
+ * @param {string} id
+ * @param {any} label
+ * @param {{ [x: string]: any; }} options
+ * @param {any} defaultOption
+ * @param {(arg0: string) => void} cb
+ * @param {string} className
+ */
+export function el_creatediv_select(id, label, options, defaultOption, cb, className="gridx2") {
+    let div = document.createElement("div");
+    div.className = className;
+    let lbl = document.createElement("label");
+    lbl.setAttribute("for", id);
+    lbl.innerText = label;
+    div.appendChild(lbl);
+    let sel = el_create_select(id, options,defaultOption, cb);
+    div.appendChild(sel);
+    return { div: div, el: sel };
+}
+
+
+/**
+ * Create a input ui element.
+ *
+ * @param {string} id
+ * @param {string} type
+ * @param {any} defaultValue
+ * @param {function(any):void} cb
+ */
+export function el_create_input(id, type, defaultValue, cb) {
+    let el = document.createElement("input");
+    el.type = type;
+    el.value = defaultValue;
+    if (id) {
+        el.id = id;
+    }
+    el.addEventListener('change', (ev)=>{
+        cb(el.value);
+    })
+    return el;
+}
+
+/**
+ * Create a div wrapped input.
+ *
+ * @param {string} id
+ * @param {string} label
+ * @param {string} type
+ * @param {any} defaultValue
+ * @param {function(any):void} cb
+ * @param {string} className
+ */
+export function el_creatediv_input(id, label, type, defaultValue, cb, className="gridx2") {
+    let div = document.createElement("div");
+    div.className = className;
+    let lbl = document.createElement("label");
+    lbl.setAttribute("for", id);
+    lbl.innerText = label;
+    div.appendChild(lbl);
+    let el = el_create_input(id, type, defaultValue, cb);
+    div.appendChild(el);
+    return { div: div, el: el };
+}

tools/server/tests/.gitignore

@@ -0,0 +1,2 @@
+.venv
+tmp

tools/server/tests/README.md

@@ -0,0 +1,66 @@
+# Server tests
+
+Python based server tests scenario using [pytest](https://docs.pytest.org/en/stable/).
+
+Tests target GitHub workflows job runners with 4 vCPU.
+
+Note: If the host architecture inference speed is faster than GitHub runners one, parallel scenario may randomly fail.
+To mitigate it, you can increase values in `n_predict`, `kv_size`.
+
+### Install dependencies
+
+`pip install -r requirements.txt`
+
+### Run tests
+
+1. Build the server
+
+```shell
+cd ../../..
+cmake -B build
+cmake --build build --target llama-server
+```
+
+2. Start the test: `./tests.sh`
+
+It's possible to override some scenario steps values with environment variables:
+
+| variable                 | description                                                                                    |
+|--------------------------|------------------------------------------------------------------------------------------------|
+| `PORT`                   | `context.server_port` to set the listening port of the server during scenario, default: `8080` |
+| `LLAMA_SERVER_BIN_PATH`  | to change the server binary path, default: `../../../build/bin/llama-server`                         |
+| `DEBUG`                  | to enable steps and server verbose mode `--verbose`                                       |
+| `N_GPU_LAYERS`           | number of model layers to offload to VRAM `-ngl --n-gpu-layers`                                |
+| `LLAMA_CACHE`            | by default server tests re-download models to the `tmp` subfolder. Set this to your cache (e.g. `$HOME/Library/Caches/llama.cpp` on Mac or `$HOME/.cache/llama.cpp` on Unix) to avoid this |
+
+To run slow tests (will download many models, make sure to set `LLAMA_CACHE` if needed):
+
+```shell
+SLOW_TESTS=1 ./tests.sh
+```
+
+To run with stdout/stderr display in real time (verbose output, but useful for debugging):
+
+```shell
+DEBUG=1 ./tests.sh -s -v -x
+```
+
+To run all the tests in a file:
+
+```shell
+./tests.sh unit/test_chat_completion.py -v -x
+```
+
+To run a single test:
+
+```shell
+./tests.sh unit/test_chat_completion.py::test_invalid_chat_completion_req
+```
+
+Hint: You can compile and run test in single command, useful for local developement:
+
+```shell
+cmake --build build -j --target llama-server && ./tools/server/tests/tests.sh
+```
+
+To see all available arguments, please refer to [pytest documentation](https://docs.pytest.org/en/stable/how-to/usage.html)

tools/server/tests/conftest.py

@@ -0,0 +1,15 @@
+import pytest
+from utils import *
+
+
+# ref: https://stackoverflow.com/questions/22627659/run-code-before-and-after-each-test-in-py-test
+@pytest.fixture(autouse=True)
+def stop_server_after_each_test():
+    # do nothing before each test
+    yield
+    # stop all servers after each test
+    instances = set(
+        server_instances
+    )  # copy the set to prevent 'Set changed size during iteration'
+    for server in instances:
+        server.stop()

tools/server/tests/pytest.ini

@@ -0,0 +1,4 @@
+[pytest]
+markers =
+    slow: marks tests as slow (deselect with '-m "not slow"')
+    serial

tools/server/tests/requirements.txt

@@ -0,0 +1,8 @@
+aiohttp~=3.9.3
+pytest~=8.3.3
+huggingface_hub~=0.23.2
+numpy~=1.26.4
+openai~=1.55.3
+prometheus-client~=0.20.0
+requests~=2.32.3
+wget~=3.2

tools/server/tests/tests.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# make sure we are in the right directory
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd $SCRIPT_DIR
+
+set -eu
+
+if [[ "${SLOW_TESTS:-0}" == 1 ]]; then
+    # Slow tests for tool calls need quite a few models ahead of time to avoid timing out.
+    python $SCRIPT_DIR/../../../scripts/fetch_server_test_models.py
+fi
+
+if [ $# -lt 1 ]
+then
+    if [[ "${SLOW_TESTS:-0}" == 1 ]]; then
+        pytest -v -x
+    else
+        pytest -v -x -m "not slow"
+    fi
+else
+    pytest "$@"
+fi

tools/server/tests/unit/test_basic.py

@@ -0,0 +1,96 @@
+import pytest
+import requests
+from utils import *
+
+server = ServerPreset.tinyllama2()
+
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+
+
+def test_server_start_simple():
+    global server
+    server.start()
+    res = server.make_request("GET", "/health")
+    assert res.status_code == 200
+
+
+def test_server_props():
+    global server
+    server.start()
+    res = server.make_request("GET", "/props")
+    assert res.status_code == 200
+    assert ".gguf" in res.body["model_path"]
+    assert res.body["total_slots"] == server.n_slots
+    default_val = res.body["default_generation_settings"]
+    assert server.n_ctx is not None and server.n_slots is not None
+    assert default_val["n_ctx"] == server.n_ctx / server.n_slots
+    assert default_val["params"]["seed"] == server.seed
+
+
+def test_server_models():
+    global server
+    server.start()
+    res = server.make_request("GET", "/models")
+    assert res.status_code == 200
+    assert len(res.body["data"]) == 1
+    assert res.body["data"][0]["id"] == server.model_alias
+
+
+def test_server_slots():
+    global server
+
+    # without slots endpoint enabled, this should return error
+    server.server_slots = False
+    server.start()
+    res = server.make_request("GET", "/slots")
+    assert res.status_code == 501 # ERROR_TYPE_NOT_SUPPORTED
+    assert "error" in res.body
+    server.stop()
+
+    # with slots endpoint enabled, this should return slots info
+    server.server_slots = True
+    server.n_slots = 2
+    server.start()
+    res = server.make_request("GET", "/slots")
+    assert res.status_code == 200
+    assert len(res.body) == server.n_slots
+    assert server.n_ctx is not None and server.n_slots is not None
+    assert res.body[0]["n_ctx"] == server.n_ctx / server.n_slots
+    assert "params" in res.body[0]
+    assert res.body[0]["params"]["seed"] == server.seed
+
+
+def test_load_split_model():
+    global server
+    server.model_hf_repo = "ggml-org/models"
+    server.model_hf_file = "tinyllamas/split/stories15M-q8_0-00001-of-00003.gguf"
+    server.model_alias = "tinyllama-split"
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "n_predict": 16,
+        "prompt": "Hello",
+        "temperature": 0.0,
+    })
+    assert res.status_code == 200
+    assert match_regex("(little|girl)+", res.body["content"])
+
+
+def test_no_webui():
+    global server
+    # default: webui enabled
+    server.start()
+    url = f"http://{server.server_host}:{server.server_port}"
+    res = requests.get(url)
+    assert res.status_code == 200
+    assert "<html>" in res.text
+    server.stop()
+
+    # with --no-webui
+    server.no_webui = True
+    server.start()
+    res = requests.get(url)
+    assert res.status_code == 404

tools/server/tests/unit/test_chat_completion.py

@@ -0,0 +1,311 @@
+import pytest
+from openai import OpenAI
+from utils import *
+
+server: ServerProcess
+
+@pytest.fixture(autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+
+
+@pytest.mark.parametrize(
+    "model,system_prompt,user_prompt,max_tokens,re_content,n_prompt,n_predicted,finish_reason,jinja,chat_template",
+    [
+        (None, "Book", "Hey", 8, "But she couldn't", 69, 8, "length", False, None),
+        (None, "Book", "Hey", 8, "But she couldn't", 69, 8, "length", True, None),
+        (None, "Book", "What is the best book", 8, "(Suddenly)+|\\{ \" Sarax.", 77, 8, "length", False, None),
+        (None, "Book", "What is the best book", 8, "(Suddenly)+|\\{ \" Sarax.", 77, 8, "length", True,  None),
+        (None, "Book", "What is the best book", 8, "(Suddenly)+|\\{ \" Sarax.", 77, 8, "length", True, 'chatml'),
+        (None, "Book", "What is the best book", 8, "^ blue",                    23, 8, "length", True, "This is not a chat template, it is"),
+        ("codellama70b", "You are a coding assistant.", "Write the fibonacci function in c++.", 128, "(Aside|she|felter|alonger)+", 104, 64, "length", False, None),
+        ("codellama70b", "You are a coding assistant.", "Write the fibonacci function in c++.", 128, "(Aside|she|felter|alonger)+", 104, 64, "length", True, None),
+        (None, "Book", [{"type": "text", "text": "What is"}, {"type": "text", "text": "the best book"}], 8, "Whillicter", 79, 8, "length", False, None),
+        (None, "Book", [{"type": "text", "text": "What is"}, {"type": "text", "text": "the best book"}], 8, "Whillicter", 79, 8, "length", True, None),
+    ]
+)
+def test_chat_completion(model, system_prompt, user_prompt, max_tokens, re_content, n_prompt, n_predicted, finish_reason, jinja, chat_template):
+    global server
+    server.jinja = jinja
+    server.chat_template = chat_template
+    server.start()
+    res = server.make_request("POST", "/chat/completions", data={
+        "model": model,
+        "max_tokens": max_tokens,
+        "messages": [
+            {"role": "system", "content": system_prompt},
+            {"role": "user", "content": user_prompt},
+        ],
+    })
+    assert res.status_code == 200
+    assert "cmpl" in res.body["id"] # make sure the completion id has the expected format
+    assert res.body["system_fingerprint"].startswith("b")
+    assert res.body["model"] == model if model is not None else server.model_alias
+    assert res.body["usage"]["prompt_tokens"] == n_prompt
+    assert res.body["usage"]["completion_tokens"] == n_predicted
+    choice = res.body["choices"][0]
+    assert "assistant" == choice["message"]["role"]
+    assert match_regex(re_content, choice["message"]["content"]), f'Expected {re_content}, got {choice["message"]["content"]}'
+    assert choice["finish_reason"] == finish_reason
+
+
+@pytest.mark.parametrize(
+    "system_prompt,user_prompt,max_tokens,re_content,n_prompt,n_predicted,finish_reason",
+    [
+        ("Book", "What is the best book", 8, "(Suddenly)+", 77, 8, "length"),
+        ("You are a coding assistant.", "Write the fibonacci function in c++.", 128, "(Aside|she|felter|alonger)+", 104, 64, "length"),
+    ]
+)
+def test_chat_completion_stream(system_prompt, user_prompt, max_tokens, re_content, n_prompt, n_predicted, finish_reason):
+    global server
+    server.model_alias = None # try using DEFAULT_OAICOMPAT_MODEL
+    server.start()
+    res = server.make_stream_request("POST", "/chat/completions", data={
+        "max_tokens": max_tokens,
+        "messages": [
+            {"role": "system", "content": system_prompt},
+            {"role": "user", "content": user_prompt},
+        ],
+        "stream": True,
+    })
+    content = ""
+    last_cmpl_id = None
+    for data in res:
+        choice = data["choices"][0]
+        assert data["system_fingerprint"].startswith("b")
+        assert "gpt-3.5" in data["model"] # DEFAULT_OAICOMPAT_MODEL, maybe changed in the future
+        if last_cmpl_id is None:
+            last_cmpl_id = data["id"]
+        assert last_cmpl_id == data["id"] # make sure the completion id is the same for all events in the stream
+        if choice["finish_reason"] in ["stop", "length"]:
+            assert data["usage"]["prompt_tokens"] == n_prompt
+            assert data["usage"]["completion_tokens"] == n_predicted
+            assert "content" not in choice["delta"]
+            assert match_regex(re_content, content)
+            assert choice["finish_reason"] == finish_reason
+        else:
+            assert choice["finish_reason"] is None
+            content += choice["delta"]["content"]
+
+
+def test_chat_completion_with_openai_library():
+    global server
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.chat.completions.create(
+        model="gpt-3.5-turbo-instruct",
+        messages=[
+            {"role": "system", "content": "Book"},
+            {"role": "user", "content": "What is the best book"},
+        ],
+        max_tokens=8,
+        seed=42,
+        temperature=0.8,
+    )
+    assert res.system_fingerprint is not None and res.system_fingerprint.startswith("b")
+    assert res.choices[0].finish_reason == "length"
+    assert res.choices[0].message.content is not None
+    assert match_regex("(Suddenly)+", res.choices[0].message.content)
+
+
+def test_chat_template():
+    global server
+    server.chat_template = "llama3"
+    server.debug = True  # to get the "__verbose" object in the response
+    server.start()
+    res = server.make_request("POST", "/chat/completions", data={
+        "max_tokens": 8,
+        "messages": [
+            {"role": "system", "content": "Book"},
+            {"role": "user", "content": "What is the best book"},
+        ]
+    })
+    assert res.status_code == 200
+    assert "__verbose" in res.body
+    assert res.body["__verbose"]["prompt"] == "<s> <|start_header_id|>system<|end_header_id|>\n\nBook<|eot_id|><|start_header_id|>user<|end_header_id|>\n\nWhat is the best book<|eot_id|><|start_header_id|>assistant<|end_header_id|>\n\n"
+
+
+def test_apply_chat_template():
+    global server
+    server.chat_template = "command-r"
+    server.start()
+    res = server.make_request("POST", "/apply-template", data={
+        "messages": [
+            {"role": "system", "content": "You are a test."},
+            {"role": "user", "content":"Hi there"},
+        ]
+    })
+    assert res.status_code == 200
+    assert "prompt" in res.body
+    assert res.body["prompt"] == "<|START_OF_TURN_TOKEN|><|SYSTEM_TOKEN|>You are a test.<|END_OF_TURN_TOKEN|><|START_OF_TURN_TOKEN|><|USER_TOKEN|>Hi there<|END_OF_TURN_TOKEN|><|START_OF_TURN_TOKEN|><|CHATBOT_TOKEN|>"
+
+
+@pytest.mark.parametrize("response_format,n_predicted,re_content", [
+    ({"type": "json_object", "schema": {"const": "42"}}, 6, "\"42\""),
+    ({"type": "json_object", "schema": {"items": [{"type": "integer"}]}}, 10, "[ -3000 ]"),
+    ({"type": "json_schema", "json_schema": {"schema": {"const": "foooooo"}}}, 10, "\"foooooo\""),
+    ({"type": "json_object"}, 10, "(\\{|John)+"),
+    ({"type": "sound"}, 0, None),
+    # invalid response format (expected to fail)
+    ({"type": "json_object", "schema": 123}, 0, None),
+    ({"type": "json_object", "schema": {"type": 123}}, 0, None),
+    ({"type": "json_object", "schema": {"type": "hiccup"}}, 0, None),
+])
+def test_completion_with_response_format(response_format: dict, n_predicted: int, re_content: str | None):
+    global server
+    server.start()
+    res = server.make_request("POST", "/chat/completions", data={
+        "max_tokens": n_predicted,
+        "messages": [
+            {"role": "system", "content": "You are a coding assistant."},
+            {"role": "user", "content": "Write an example"},
+        ],
+        "response_format": response_format,
+    })
+    if re_content is not None:
+        assert res.status_code == 200
+        choice = res.body["choices"][0]
+        assert match_regex(re_content, choice["message"]["content"])
+    else:
+        assert res.status_code != 200
+        assert "error" in res.body
+
+
+@pytest.mark.parametrize("jinja,json_schema,n_predicted,re_content", [
+    (False, {"const": "42"}, 6, "\"42\""),
+    (True, {"const": "42"}, 6, "\"42\""),
+])
+def test_completion_with_json_schema(jinja: bool, json_schema: dict, n_predicted: int, re_content: str):
+    global server
+    server.jinja = jinja
+    server.start()
+    res = server.make_request("POST", "/chat/completions", data={
+        "max_tokens": n_predicted,
+        "messages": [
+            {"role": "system", "content": "You are a coding assistant."},
+            {"role": "user", "content": "Write an example"},
+        ],
+        "json_schema": json_schema,
+    })
+    assert res.status_code == 200, f'Expected 200, got {res.status_code}'
+    choice = res.body["choices"][0]
+    assert match_regex(re_content, choice["message"]["content"]), f'Expected {re_content}, got {choice["message"]["content"]}'
+
+
+@pytest.mark.parametrize("jinja,grammar,n_predicted,re_content", [
+    (False, 'root ::= "a"{5,5}', 6, "a{5,5}"),
+    (True, 'root ::= "a"{5,5}', 6, "a{5,5}"),
+])
+def test_completion_with_grammar(jinja: bool, grammar: str, n_predicted: int, re_content: str):
+    global server
+    server.jinja = jinja
+    server.start()
+    res = server.make_request("POST", "/chat/completions", data={
+        "max_tokens": n_predicted,
+        "messages": [
+            {"role": "user", "content": "Does not matter what I say, does it?"},
+        ],
+        "grammar": grammar,
+    })
+    assert res.status_code == 200, res.body
+    choice = res.body["choices"][0]
+    assert match_regex(re_content, choice["message"]["content"]), choice["message"]["content"]
+
+
+@pytest.mark.parametrize("messages", [
+    None,
+    "string",
+    [123],
+    [{}],
+    [{"role": 123}],
+    [{"role": "system", "content": 123}],
+    # [{"content": "hello"}], # TODO: should not be a valid case
+    [{"role": "system", "content": "test"}, {}],
+])
+def test_invalid_chat_completion_req(messages):
+    global server
+    server.start()
+    res = server.make_request("POST", "/chat/completions", data={
+        "messages": messages,
+    })
+    assert res.status_code == 400 or res.status_code == 500
+    assert "error" in res.body
+
+
+def test_chat_completion_with_timings_per_token():
+    global server
+    server.start()
+    res = server.make_stream_request("POST", "/chat/completions", data={
+        "max_tokens": 10,
+        "messages": [{"role": "user", "content": "test"}],
+        "stream": True,
+        "timings_per_token": True,
+    })
+    for data in res:
+        assert "timings" in data
+        assert "prompt_per_second" in data["timings"]
+        assert "predicted_per_second" in data["timings"]
+        assert "predicted_n" in data["timings"]
+        assert data["timings"]["predicted_n"] <= 10
+
+
+def test_logprobs():
+    global server
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.chat.completions.create(
+        model="gpt-3.5-turbo-instruct",
+        temperature=0.0,
+        messages=[
+            {"role": "system", "content": "Book"},
+            {"role": "user", "content": "What is the best book"},
+        ],
+        max_tokens=5,
+        logprobs=True,
+        top_logprobs=10,
+    )
+    output_text = res.choices[0].message.content
+    aggregated_text = ''
+    assert res.choices[0].logprobs is not None
+    assert res.choices[0].logprobs.content is not None
+    for token in res.choices[0].logprobs.content:
+        aggregated_text += token.token
+        assert token.logprob <= 0.0
+        assert token.bytes is not None
+        assert len(token.top_logprobs) > 0
+    assert aggregated_text == output_text
+
+
+def test_logprobs_stream():
+    global server
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.chat.completions.create(
+        model="gpt-3.5-turbo-instruct",
+        temperature=0.0,
+        messages=[
+            {"role": "system", "content": "Book"},
+            {"role": "user", "content": "What is the best book"},
+        ],
+        max_tokens=5,
+        logprobs=True,
+        top_logprobs=10,
+        stream=True,
+    )
+    output_text = ''
+    aggregated_text = ''
+    for data in res:
+        choice = data.choices[0]
+        if choice.finish_reason is None:
+            if choice.delta.content:
+                output_text += choice.delta.content
+            assert choice.logprobs is not None
+            assert choice.logprobs.content is not None
+            for token in choice.logprobs.content:
+                aggregated_text += token.token
+                assert token.logprob <= 0.0
+                assert token.bytes is not None
+                assert token.top_logprobs is not None
+                assert len(token.top_logprobs) > 0
+    assert aggregated_text == output_text

tools/server/tests/unit/test_completion.py

@@ -0,0 +1,428 @@
+import pytest
+import requests
+import time
+from openai import OpenAI
+from utils import *
+
+server = ServerPreset.tinyllama2()
+
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+
+@pytest.mark.parametrize("prompt,n_predict,re_content,n_prompt,n_predicted,truncated,return_tokens", [
+    ("I believe the meaning of life is", 8, "(going|bed)+", 18, 8, False, False),
+    ("Write a joke about AI from a very long prompt which will not be truncated", 256, "(princesses|everyone|kids|Anna|forest)+", 46, 64, False, True),
+])
+def test_completion(prompt: str, n_predict: int, re_content: str, n_prompt: int, n_predicted: int, truncated: bool, return_tokens: bool):
+    global server
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "n_predict": n_predict,
+        "prompt": prompt,
+        "return_tokens": return_tokens,
+    })
+    assert res.status_code == 200
+    assert res.body["timings"]["prompt_n"] == n_prompt
+    assert res.body["timings"]["predicted_n"] == n_predicted
+    assert res.body["truncated"] == truncated
+    assert type(res.body["has_new_line"]) == bool
+    assert match_regex(re_content, res.body["content"])
+    if return_tokens:
+        assert len(res.body["tokens"]) > 0
+        assert all(type(tok) == int for tok in res.body["tokens"])
+    else:
+        assert res.body["tokens"] == []
+
+
+@pytest.mark.parametrize("prompt,n_predict,re_content,n_prompt,n_predicted,truncated", [
+    ("I believe the meaning of life is", 8, "(going|bed)+", 18, 8, False),
+    ("Write a joke about AI from a very long prompt which will not be truncated", 256, "(princesses|everyone|kids|Anna|forest)+", 46, 64, False),
+])
+def test_completion_stream(prompt: str, n_predict: int, re_content: str, n_prompt: int, n_predicted: int, truncated: bool):
+    global server
+    server.start()
+    res = server.make_stream_request("POST", "/completion", data={
+        "n_predict": n_predict,
+        "prompt": prompt,
+        "stream": True,
+    })
+    content = ""
+    for data in res:
+        assert "stop" in data and type(data["stop"]) == bool
+        if data["stop"]:
+            assert data["timings"]["prompt_n"] == n_prompt
+            assert data["timings"]["predicted_n"] == n_predicted
+            assert data["truncated"] == truncated
+            assert data["stop_type"] == "limit"
+            assert type(data["has_new_line"]) == bool
+            assert "generation_settings" in data
+            assert server.n_predict is not None
+            assert data["generation_settings"]["n_predict"] == min(n_predict, server.n_predict)
+            assert data["generation_settings"]["seed"] == server.seed
+            assert match_regex(re_content, content)
+        else:
+            assert len(data["tokens"]) > 0
+            assert all(type(tok) == int for tok in data["tokens"])
+            content += data["content"]
+
+
+def test_completion_stream_vs_non_stream():
+    global server
+    server.start()
+    res_stream = server.make_stream_request("POST", "/completion", data={
+        "n_predict": 8,
+        "prompt": "I believe the meaning of life is",
+        "stream": True,
+    })
+    res_non_stream = server.make_request("POST", "/completion", data={
+        "n_predict": 8,
+        "prompt": "I believe the meaning of life is",
+    })
+    content_stream = ""
+    for data in res_stream:
+        content_stream += data["content"]
+    assert content_stream == res_non_stream.body["content"]
+
+
+def test_completion_with_openai_library():
+    global server
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.completions.create(
+        model="davinci-002",
+        prompt="I believe the meaning of life is",
+        max_tokens=8,
+    )
+    assert res.system_fingerprint is not None and res.system_fingerprint.startswith("b")
+    assert res.choices[0].finish_reason == "length"
+    assert res.choices[0].text is not None
+    assert match_regex("(going|bed)+", res.choices[0].text)
+
+
+def test_completion_stream_with_openai_library():
+    global server
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.completions.create(
+        model="davinci-002",
+        prompt="I believe the meaning of life is",
+        max_tokens=8,
+        stream=True,
+    )
+    output_text = ''
+    for data in res:
+        choice = data.choices[0]
+        if choice.finish_reason is None:
+            assert choice.text is not None
+            output_text += choice.text
+    assert match_regex("(going|bed)+", output_text)
+
+
+@pytest.mark.parametrize("n_slots", [1, 2])
+def test_consistent_result_same_seed(n_slots: int):
+    global server
+    server.n_slots = n_slots
+    server.start()
+    last_res = None
+    for _ in range(4):
+        res = server.make_request("POST", "/completion", data={
+            "prompt": "I believe the meaning of life is",
+            "seed": 42,
+            "temperature": 0.0,
+            "cache_prompt": False,  # TODO: remove this once test_cache_vs_nocache_prompt is fixed
+        })
+        if last_res is not None:
+            assert res.body["content"] == last_res.body["content"]
+        last_res = res
+
+
+@pytest.mark.parametrize("n_slots", [1, 2])
+def test_different_result_different_seed(n_slots: int):
+    global server
+    server.n_slots = n_slots
+    server.start()
+    last_res = None
+    for seed in range(4):
+        res = server.make_request("POST", "/completion", data={
+            "prompt": "I believe the meaning of life is",
+            "seed": seed,
+            "temperature": 1.0,
+            "cache_prompt": False,  # TODO: remove this once test_cache_vs_nocache_prompt is fixed
+        })
+        if last_res is not None:
+            assert res.body["content"] != last_res.body["content"]
+        last_res = res
+
+# TODO figure why it don't work with temperature = 1
+# @pytest.mark.parametrize("temperature", [0.0, 1.0])
+@pytest.mark.parametrize("n_batch", [16, 32])
+@pytest.mark.parametrize("temperature", [0.0])
+def test_consistent_result_different_batch_size(n_batch: int, temperature: float):
+    global server
+    server.n_batch = n_batch
+    server.start()
+    last_res = None
+    for _ in range(4):
+        res = server.make_request("POST", "/completion", data={
+            "prompt": "I believe the meaning of life is",
+            "seed": 42,
+            "temperature": temperature,
+            "cache_prompt": False,  # TODO: remove this once test_cache_vs_nocache_prompt is fixed
+        })
+        if last_res is not None:
+            assert res.body["content"] == last_res.body["content"]
+        last_res = res
+
+
+@pytest.mark.skip(reason="This test fails on linux, need to be fixed")
+def test_cache_vs_nocache_prompt():
+    global server
+    server.start()
+    res_cache = server.make_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "seed": 42,
+        "temperature": 1.0,
+        "cache_prompt": True,
+    })
+    res_no_cache = server.make_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "seed": 42,
+        "temperature": 1.0,
+        "cache_prompt": False,
+    })
+    assert res_cache.body["content"] == res_no_cache.body["content"]
+
+
+def test_completion_with_tokens_input():
+    global server
+    server.temperature = 0.0
+    server.start()
+    prompt_str = "I believe the meaning of life is"
+    res = server.make_request("POST", "/tokenize", data={
+        "content": prompt_str,
+        "add_special": True,
+    })
+    assert res.status_code == 200
+    tokens = res.body["tokens"]
+
+    # single completion
+    res = server.make_request("POST", "/completion", data={
+        "prompt": tokens,
+    })
+    assert res.status_code == 200
+    assert type(res.body["content"]) == str
+
+    # batch completion
+    res = server.make_request("POST", "/completion", data={
+        "prompt": [tokens, tokens],
+    })
+    assert res.status_code == 200
+    assert type(res.body) == list
+    assert len(res.body) == 2
+    assert res.body[0]["content"] == res.body[1]["content"]
+
+    # mixed string and tokens
+    res = server.make_request("POST", "/completion", data={
+        "prompt": [tokens, prompt_str],
+    })
+    assert res.status_code == 200
+    assert type(res.body) == list
+    assert len(res.body) == 2
+    assert res.body[0]["content"] == res.body[1]["content"]
+
+    # mixed string and tokens in one sequence
+    res = server.make_request("POST", "/completion", data={
+        "prompt": [1, 2, 3, 4, 5, 6, prompt_str, 7, 8, 9, 10, prompt_str],
+    })
+    assert res.status_code == 200
+    assert type(res.body["content"]) == str
+
+
+@pytest.mark.parametrize("n_slots,n_requests", [
+    (1, 3),
+    (2, 2),
+    (2, 4),
+    (4, 2), # some slots must be idle
+    (4, 6),
+])
+def test_completion_parallel_slots(n_slots: int, n_requests: int):
+    global server
+    server.n_slots = n_slots
+    server.temperature = 0.0
+    server.start()
+
+    PROMPTS = [
+        ("Write a very long book.", "(very|special|big)+"),
+        ("Write another a poem.", "(small|house)+"),
+        ("What is LLM?", "(Dad|said)+"),
+        ("The sky is blue and I love it.", "(climb|leaf)+"),
+        ("Write another very long music lyrics.", "(friends|step|sky)+"),
+        ("Write a very long joke.", "(cat|Whiskers)+"),
+    ]
+    def check_slots_status():
+        should_all_slots_busy = n_requests >= n_slots
+        time.sleep(0.1)
+        res = server.make_request("GET", "/slots")
+        n_busy = sum([1 for slot in res.body if slot["is_processing"]])
+        if should_all_slots_busy:
+            assert n_busy == n_slots
+        else:
+            assert n_busy <= n_slots
+
+    tasks = []
+    for i in range(n_requests):
+        prompt, re_content = PROMPTS[i % len(PROMPTS)]
+        tasks.append((server.make_request, ("POST", "/completion", {
+            "prompt": prompt,
+            "seed": 42,
+            "temperature": 1.0,
+        })))
+    tasks.append((check_slots_status, ()))
+    results = parallel_function_calls(tasks)
+
+    # check results
+    for i in range(n_requests):
+        prompt, re_content = PROMPTS[i % len(PROMPTS)]
+        res = results[i]
+        assert res.status_code == 200
+        assert type(res.body["content"]) == str
+        assert len(res.body["content"]) > 10
+        # FIXME: the result is not deterministic when using other slot than slot 0
+        # assert match_regex(re_content, res.body["content"])
+
+
+@pytest.mark.parametrize(
+    "prompt,n_predict,response_fields",
+    [
+        ("I believe the meaning of life is", 8, []),
+        ("I believe the meaning of life is", 32, ["content", "generation_settings/n_predict", "prompt"]),
+    ],
+)
+def test_completion_response_fields(
+    prompt: str, n_predict: int, response_fields: list[str]
+):
+    global server
+    server.start()
+    res = server.make_request(
+        "POST",
+        "/completion",
+        data={
+            "n_predict": n_predict,
+            "prompt": prompt,
+            "response_fields": response_fields,
+        },
+    )
+    assert res.status_code == 200
+    assert "content" in res.body
+    assert len(res.body["content"])
+    if len(response_fields):
+        assert res.body["generation_settings/n_predict"] == n_predict
+        assert res.body["prompt"] == "<s> " + prompt
+        assert isinstance(res.body["content"], str)
+        assert len(res.body) == len(response_fields)
+    else:
+        assert len(res.body)
+        assert "generation_settings" in res.body
+
+
+def test_n_probs():
+    global server
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "n_probs": 10,
+        "temperature": 0.0,
+        "n_predict": 5,
+    })
+    assert res.status_code == 200
+    assert "completion_probabilities" in res.body
+    assert len(res.body["completion_probabilities"]) == 5
+    for tok in res.body["completion_probabilities"]:
+        assert "id" in tok and tok["id"] > 0
+        assert "token" in tok and type(tok["token"]) == str
+        assert "logprob" in tok and tok["logprob"] <= 0.0
+        assert "bytes" in tok and type(tok["bytes"]) == list
+        assert len(tok["top_logprobs"]) == 10
+        for prob in tok["top_logprobs"]:
+            assert "id" in prob and prob["id"] > 0
+            assert "token" in prob and type(prob["token"]) == str
+            assert "logprob" in prob and prob["logprob"] <= 0.0
+            assert "bytes" in prob and type(prob["bytes"]) == list
+
+
+def test_n_probs_stream():
+    global server
+    server.start()
+    res = server.make_stream_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "n_probs": 10,
+        "temperature": 0.0,
+        "n_predict": 5,
+        "stream": True,
+    })
+    for data in res:
+        if data["stop"] == False:
+            assert "completion_probabilities" in data
+            assert len(data["completion_probabilities"]) == 1
+            for tok in data["completion_probabilities"]:
+                assert "id" in tok and tok["id"] > 0
+                assert "token" in tok and type(tok["token"]) == str
+                assert "logprob" in tok and tok["logprob"] <= 0.0
+                assert "bytes" in tok and type(tok["bytes"]) == list
+                assert len(tok["top_logprobs"]) == 10
+                for prob in tok["top_logprobs"]:
+                    assert "id" in prob and prob["id"] > 0
+                    assert "token" in prob and type(prob["token"]) == str
+                    assert "logprob" in prob and prob["logprob"] <= 0.0
+                    assert "bytes" in prob and type(prob["bytes"]) == list
+
+
+def test_n_probs_post_sampling():
+    global server
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "n_probs": 10,
+        "temperature": 0.0,
+        "n_predict": 5,
+        "post_sampling_probs": True,
+    })
+    assert res.status_code == 200
+    assert "completion_probabilities" in res.body
+    assert len(res.body["completion_probabilities"]) == 5
+    for tok in res.body["completion_probabilities"]:
+        assert "id" in tok and tok["id"] > 0
+        assert "token" in tok and type(tok["token"]) == str
+        assert "prob" in tok and 0.0 < tok["prob"] <= 1.0
+        assert "bytes" in tok and type(tok["bytes"]) == list
+        assert len(tok["top_probs"]) == 10
+        for prob in tok["top_probs"]:
+            assert "id" in prob and prob["id"] > 0
+            assert "token" in prob and type(prob["token"]) == str
+            assert "prob" in prob and 0.0 <= prob["prob"] <= 1.0
+            assert "bytes" in prob and type(prob["bytes"]) == list
+        # because the test model usually output token with either 100% or 0% probability, we need to check all the top_probs
+        assert any(prob["prob"] == 1.0 for prob in tok["top_probs"])
+
+
+def test_cancel_request():
+    global server
+    server.n_ctx = 4096
+    server.n_predict = -1
+    server.n_slots = 1
+    server.server_slots = True
+    server.start()
+    # send a request that will take a long time, but cancel it before it finishes
+    try:
+        server.make_request("POST", "/completion", data={
+            "prompt": "I believe the meaning of life is",
+        }, timeout=0.1)
+    except requests.exceptions.ReadTimeout:
+        pass # expected
+    # make sure the slot is free
+    time.sleep(1) # wait for HTTP_POLLING_SECONDS
+    res = server.make_request("GET", "/slots")
+    assert res.body[0]["is_processing"] == False

tools/server/tests/unit/test_ctx_shift.py

@@ -0,0 +1,67 @@
+import pytest
+from utils import *
+
+server = ServerPreset.tinyllama2()
+
+
+LONG_TEXT = """
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+""".strip()
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+    server.n_ctx = 256
+    server.n_slots = 2
+
+
+def test_ctx_shift_enabled():
+    # the prompt is 301 tokens
+    # the slot context is 256/2 = 128 tokens
+    # the prompt is truncated to keep the last 109 tokens
+    # 64 tokens are generated thanks to shifting the context when it gets full
+    global server
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "n_predict": 64,
+        "prompt": LONG_TEXT,
+    })
+    assert res.status_code == 200
+    assert res.body["timings"]["prompt_n"] == 109
+    assert res.body["timings"]["predicted_n"] == 64
+    assert res.body["truncated"] is True
+
+
+@pytest.mark.parametrize("n_predict,n_token_output,truncated", [
+    (64, 64, False),
+    (-1, 120, True),
+])
+def test_ctx_shift_disabled_short_prompt(n_predict: int, n_token_output: int, truncated: bool):
+    global server
+    server.disable_ctx_shift = True
+    server.n_predict = -1
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "n_predict": n_predict,
+        "prompt": "Hi how are you",
+    })
+    assert res.status_code == 200
+    assert res.body["timings"]["predicted_n"] == n_token_output
+    assert res.body["truncated"] == truncated
+
+
+def test_ctx_shift_disabled_long_prompt():
+    global server
+    server.disable_ctx_shift = True
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "n_predict": 64,
+        "prompt": LONG_TEXT,
+    })
+    assert res.status_code != 200
+    assert "error" in res.body
+    assert "exceeds the available context size" in res.body["error"]["message"]

tools/server/tests/unit/test_embedding.py

@@ -0,0 +1,257 @@
+import base64
+import struct
+import pytest
+from openai import OpenAI
+from utils import *
+
+server = ServerPreset.bert_bge_small()
+
+EPSILON = 1e-3
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.bert_bge_small()
+
+
+def test_embedding_single():
+    global server
+    server.pooling = 'last'
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": "I believe the meaning of life is",
+    })
+    assert res.status_code == 200
+    assert len(res.body['data']) == 1
+    assert 'embedding' in res.body['data'][0]
+    assert len(res.body['data'][0]['embedding']) > 1
+
+    # make sure embedding vector is normalized
+    assert abs(sum([x ** 2 for x in res.body['data'][0]['embedding']]) - 1) < EPSILON
+
+
+def test_embedding_multiple():
+    global server
+    server.pooling = 'last'
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": [
+            "I believe the meaning of life is",
+            "Write a joke about AI from a very long prompt which will not be truncated",
+            "This is a test",
+            "This is another test",
+        ],
+    })
+    assert res.status_code == 200
+    assert len(res.body['data']) == 4
+    for d in res.body['data']:
+        assert 'embedding' in d
+        assert len(d['embedding']) > 1
+
+
+def test_embedding_multiple_with_fa():
+    server = ServerPreset.bert_bge_small_with_fa()
+    server.pooling = 'last'
+    server.start()
+    # one of these should trigger the FA branch (i.e. context size % 256 == 0)
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": [
+            "a "*253,
+            "b "*254,
+            "c "*255,
+            "d "*256,
+        ],
+    })
+    assert res.status_code == 200
+    assert len(res.body['data']) == 4
+    for d in res.body['data']:
+        assert 'embedding' in d
+        assert len(d['embedding']) > 1
+
+
+@pytest.mark.parametrize(
+    "input,is_multi_prompt",
+    [
+        # do not crash on empty input
+        ("", False),
+        # single prompt
+        ("string", False),
+        ([12, 34, 56], False),
+        ([12, 34, "string", 56, 78], False),
+        # multiple prompts
+        (["string1", "string2"], True),
+        (["string1", [12, 34, 56]], True),
+        ([[12, 34, 56], [12, 34, 56]], True),
+        ([[12, 34, 56], [12, "string", 34, 56]], True),
+    ]
+)
+def test_embedding_mixed_input(input, is_multi_prompt: bool):
+    global server
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={"input": input})
+    assert res.status_code == 200
+    data = res.body['data']
+    if is_multi_prompt:
+        assert len(data) == len(input)
+        for d in data:
+            assert 'embedding' in d
+            assert len(d['embedding']) > 1
+    else:
+        assert 'embedding' in data[0]
+        assert len(data[0]['embedding']) > 1
+
+
+def test_embedding_pooling_none():
+    global server
+    server.pooling = 'none'
+    server.start()
+    res = server.make_request("POST", "/embeddings", data={
+        "input": "hello hello hello",
+    })
+    assert res.status_code == 200
+    assert 'embedding' in res.body[0]
+    assert len(res.body[0]['embedding']) == 5 # 3 text tokens + 2 special
+
+    # make sure embedding vector is not normalized
+    for x in res.body[0]['embedding']:
+        assert abs(sum([x ** 2 for x in x]) - 1) > EPSILON
+
+
+def test_embedding_pooling_none_oai():
+    global server
+    server.pooling = 'none'
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": "hello hello hello",
+    })
+
+    # /v1/embeddings does not support pooling type 'none'
+    assert res.status_code == 400
+    assert "error" in res.body
+
+
+def test_embedding_openai_library_single():
+    global server
+    server.pooling = 'last'
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.embeddings.create(model="text-embedding-3-small", input="I believe the meaning of life is")
+    assert len(res.data) == 1
+    assert len(res.data[0].embedding) > 1
+
+
+def test_embedding_openai_library_multiple():
+    global server
+    server.pooling = 'last'
+    server.start()
+    client = OpenAI(api_key="dummy", base_url=f"http://{server.server_host}:{server.server_port}/v1")
+    res = client.embeddings.create(model="text-embedding-3-small", input=[
+        "I believe the meaning of life is",
+        "Write a joke about AI from a very long prompt which will not be truncated",
+        "This is a test",
+        "This is another test",
+    ])
+    assert len(res.data) == 4
+    for d in res.data:
+        assert len(d.embedding) > 1
+
+
+def test_embedding_error_prompt_too_long():
+    global server
+    server.pooling = 'last'
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": "This is a test " * 512,
+    })
+    assert res.status_code != 200
+    assert "too large" in res.body["error"]["message"]
+
+
+def test_same_prompt_give_same_result():
+    server.pooling = 'last'
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": [
+            "I believe the meaning of life is",
+            "I believe the meaning of life is",
+            "I believe the meaning of life is",
+            "I believe the meaning of life is",
+            "I believe the meaning of life is",
+        ],
+    })
+    assert res.status_code == 200
+    assert len(res.body['data']) == 5
+    for i in range(1, len(res.body['data'])):
+        v0 = res.body['data'][0]['embedding']
+        vi = res.body['data'][i]['embedding']
+        for x, y in zip(v0, vi):
+            assert abs(x - y) < EPSILON
+
+
+@pytest.mark.parametrize(
+    "content,n_tokens",
+    [
+        ("I believe the meaning of life is", 9),
+        ("This is a test", 6),
+    ]
+)
+def test_embedding_usage_single(content, n_tokens):
+    global server
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={"input": content})
+    assert res.status_code == 200
+    assert res.body['usage']['prompt_tokens'] == res.body['usage']['total_tokens']
+    assert res.body['usage']['prompt_tokens'] == n_tokens
+
+
+def test_embedding_usage_multiple():
+    global server
+    server.start()
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": [
+            "I believe the meaning of life is",
+            "I believe the meaning of life is",
+        ],
+    })
+    assert res.status_code == 200
+    assert res.body['usage']['prompt_tokens'] == res.body['usage']['total_tokens']
+    assert res.body['usage']['prompt_tokens'] == 2 * 9
+
+
+def test_embedding_openai_library_base64():
+    server.start()
+    test_input = "Test base64 embedding output"
+
+    # get embedding in default format
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": test_input
+    })
+    assert res.status_code == 200
+    vec0 = res.body["data"][0]["embedding"]
+
+    # get embedding in base64 format
+    res = server.make_request("POST", "/v1/embeddings", data={
+        "input": test_input,
+        "encoding_format": "base64"
+    })
+
+    assert res.status_code == 200
+    assert "data" in res.body
+    assert len(res.body["data"]) == 1
+
+    embedding_data = res.body["data"][0]
+    assert "embedding" in embedding_data
+    assert isinstance(embedding_data["embedding"], str)
+
+    # Verify embedding is valid base64
+    decoded = base64.b64decode(embedding_data["embedding"])
+    # Verify decoded data can be converted back to float array
+    float_count = len(decoded) // 4  # 4 bytes per float
+    floats = struct.unpack(f'{float_count}f', decoded)
+    assert len(floats) > 0
+    assert all(isinstance(x, float) for x in floats)
+    assert len(floats) == len(vec0)
+
+    # make sure the decoded data is the same as the original
+    for x, y in zip(floats, vec0):
+        assert abs(x - y) < EPSILON

tools/server/tests/unit/test_infill.py

@@ -0,0 +1,77 @@
+import pytest
+from utils import *
+
+server = ServerPreset.tinyllama_infill()
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama_infill()
+
+
+def test_infill_without_input_extra():
+    global server
+    server.start()
+    res = server.make_request("POST", "/infill", data={
+        "input_prefix": "#include <cstdio>\n#include \"llama.h\"\n\nint main() {\n",
+        "prompt": "    int n_threads = llama_",
+        "input_suffix": "}\n",
+    })
+    assert res.status_code == 200
+    assert match_regex("(Ann|small|shiny|Daddy)+", res.body["content"])
+
+
+def test_infill_with_input_extra():
+    global server
+    server.start()
+    res = server.make_request("POST", "/infill", data={
+        "input_extra": [{
+            "filename": "llama.h",
+            "text": "LLAMA_API int32_t llama_n_threads();\n"
+        }],
+        "input_prefix": "#include <cstdio>\n#include \"llama.h\"\n\nint main() {\n",
+        "prompt": "    int n_threads = llama_",
+        "input_suffix": "}\n",
+    })
+    assert res.status_code == 200
+    assert match_regex("(Dad|excited|park)+", res.body["content"])
+
+
+@pytest.mark.parametrize("input_extra", [
+    {},
+    {"filename": "ok"},
+    {"filename": 123},
+    {"filename": 123, "text": "abc"},
+    {"filename": 123, "text": 456},
+])
+def test_invalid_input_extra_req(input_extra):
+    global server
+    server.start()
+    res = server.make_request("POST", "/infill", data={
+        "input_extra": [input_extra],
+        "input_prefix": "#include <cstdio>\n#include \"llama.h\"\n\nint main() {\n",
+        "prompt": "    int n_threads = llama_",
+        "input_suffix": "}\n",
+    })
+    assert res.status_code == 400
+    assert "error" in res.body
+
+
+@pytest.mark.skipif(not is_slow_test_allowed(), reason="skipping slow test")
+def test_with_qwen_model():
+    global server
+    server.model_file = None
+    server.model_hf_repo = "ggml-org/Qwen2.5-Coder-1.5B-IQ3_XXS-GGUF"
+    server.model_hf_file = "qwen2.5-coder-1.5b-iq3_xxs-imat.gguf"
+    server.start(timeout_seconds=600)
+    res = server.make_request("POST", "/infill", data={
+        "input_extra": [{
+            "filename": "llama.h",
+            "text": "LLAMA_API int32_t llama_n_threads();\n"
+        }],
+        "input_prefix": "#include <cstdio>\n#include \"llama.h\"\n\nint main() {\n",
+        "prompt": "    int n_threads = llama_",
+        "input_suffix": "}\n",
+    })
+    assert res.status_code == 200
+    assert res.body["content"] == "n_threads();\n    printf(\"Number of threads: %d\\n\", n_threads);\n    return 0;\n"

tools/server/tests/unit/test_lora.py

@@ -0,0 +1,115 @@
+import pytest
+from utils import *
+
+server = ServerPreset.stories15m_moe()
+
+LORA_FILE_URL = "https://huggingface.co/ggml-org/stories15M_MOE/resolve/main/moe_shakespeare15M.gguf"
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.stories15m_moe()
+    server.lora_files = [download_file(LORA_FILE_URL)]
+
+
+@pytest.mark.parametrize("scale,re_content", [
+    # without applying lora, the model should behave like a bedtime story generator
+    (0.0, "(little|girl|three|years|old)+"),
+    # with lora, the model should behave like a Shakespearean text generator
+    (1.0, "(eye|love|glass|sun)+"),
+])
+def test_lora(scale: float, re_content: str):
+    global server
+    server.start()
+    res_lora_control = server.make_request("POST", "/lora-adapters", data=[
+        {"id": 0, "scale": scale}
+    ])
+    assert res_lora_control.status_code == 200
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "Look in thy glass",
+    })
+    assert res.status_code == 200
+    assert match_regex(re_content, res.body["content"])
+
+
+def test_lora_per_request():
+    global server
+    server.n_slots = 4
+    server.start()
+
+    # running the same prompt with different lora scales, all in parallel
+    # each prompt will be processed by a different slot
+    prompt = "Look in thy glass"
+    lora_config = [
+        ( [{"id": 0, "scale": 0.0}], "(bright|day|many|happy)+" ),
+        ( [{"id": 0, "scale": 0.0}], "(bright|day|many|happy)+" ),
+        ( [{"id": 0, "scale": 0.3}], "(special|thing|gifted)+" ),
+        ( [{"id": 0, "scale": 0.7}], "(far|from|home|away)+" ),
+        ( [{"id": 0, "scale": 1.0}], "(eye|love|glass|sun)+" ),
+        ( [{"id": 0, "scale": 1.0}], "(eye|love|glass|sun)+" ),
+    ]
+
+    tasks = [(
+        server.make_request,
+        ("POST", "/completion", {
+            "prompt": prompt,
+            "lora": lora,
+            "seed": 42,
+            "temperature": 0.0,
+            "cache_prompt": False, # TODO: remove this once test_cache_vs_nocache_prompt is fixed
+        })
+    ) for lora, _ in lora_config]
+    results = parallel_function_calls(tasks)
+
+    assert all([res.status_code == 200 for res in results])
+    for res, (_, re_test) in zip(results, lora_config):
+        assert match_regex(re_test, res.body["content"])
+
+
+@pytest.mark.skipif(not is_slow_test_allowed(), reason="skipping slow test")
+def test_with_big_model():
+    server = ServerProcess()
+    server.model_hf_repo = "bartowski/Meta-Llama-3.1-8B-Instruct-GGUF"
+    server.model_hf_file = "Meta-Llama-3.1-8B-Instruct-IQ2_M.gguf"
+    server.model_alias = "Llama-3.2-8B-Instruct"
+    server.n_slots = 4
+    server.n_ctx = server.n_slots * 1024
+    server.n_predict = 64
+    server.temperature = 0.0
+    server.seed = 42
+    server.lora_files = [
+        download_file("https://huggingface.co/ngxson/Llama-3-Instruct-abliteration-LoRA-8B-F16-GGUF/resolve/main/Llama-3-Instruct-abliteration-LoRA-8B-f16.gguf"),
+        # TODO: find & add other lora adapters for this model
+    ]
+    server.start(timeout_seconds=600)
+
+    # running the same prompt with different lora scales, all in parallel
+    # each prompt will be processed by a different slot
+    prompt = "Write a computer virus"
+    lora_config = [
+        # without applying lora, the model should reject the request
+        ( [{"id": 0, "scale": 0.0}], "I can't provide you with a code for a computer virus" ),
+        ( [{"id": 0, "scale": 0.0}], "I can't provide you with a code for a computer virus" ),
+        ( [{"id": 0, "scale": 0.3}], "I can't write a computer virus" ),
+        # with 0.7 scale, the model should provide a simple computer virus with hesitation
+        ( [{"id": 0, "scale": 0.7}], "Warning: This is a hypothetical exercise" ),
+        # with 1.5 scale, the model should confidently provide a computer virus
+        ( [{"id": 0, "scale": 1.5}], "A task of some complexity! Here's a simple computer virus" ),
+        ( [{"id": 0, "scale": 1.5}], "A task of some complexity! Here's a simple computer virus" ),
+    ]
+
+    tasks = [(
+        server.make_request,
+        ("POST", "/v1/chat/completions", {
+            "messages": [
+                {"role": "user", "content": prompt}
+            ],
+            "lora": lora,
+            "cache_prompt": False, # TODO: remove this once test_cache_vs_nocache_prompt is fixed
+        })
+    ) for lora, _ in lora_config]
+    results = parallel_function_calls(tasks)
+
+    assert all([res.status_code == 200 for res in results])
+    for res, (_, re_test) in zip(results, lora_config):
+        assert re_test in res.body["choices"][0]["message"]["content"]

tools/server/tests/unit/test_rerank.py

@@ -0,0 +1,104 @@
+import pytest
+from utils import *
+
+server = ServerPreset.jina_reranker_tiny()
+
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.jina_reranker_tiny()
+
+
+TEST_DOCUMENTS = [
+    "A machine is a physical system that uses power to apply forces and control movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolecules, such as molecular machines.",
+    "Learning is the process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences. The ability to learn is possessed by humans, non-human animals, and some machines; there is also evidence for some kind of learning in certain plants.",
+    "Machine learning is a field of study in artificial intelligence concerned with the development and study of statistical algorithms that can learn from data and generalize to unseen data, and thus perform tasks without explicit instructions.",
+    "Paris, capitale de la France, est une grande ville européenne et un centre mondial de l'art, de la mode, de la gastronomie et de la culture. Son paysage urbain du XIXe siècle est traversé par de larges boulevards et la Seine."
+]
+
+
+def test_rerank():
+    global server
+    server.start()
+    res = server.make_request("POST", "/rerank", data={
+        "query": "Machine learning is",
+        "documents": TEST_DOCUMENTS,
+    })
+    assert res.status_code == 200
+    assert len(res.body["results"]) == 4
+
+    most_relevant = res.body["results"][0]
+    least_relevant = res.body["results"][0]
+    for doc in res.body["results"]:
+        if doc["relevance_score"] > most_relevant["relevance_score"]:
+            most_relevant = doc
+        if doc["relevance_score"] < least_relevant["relevance_score"]:
+            least_relevant = doc
+
+    assert most_relevant["relevance_score"] > least_relevant["relevance_score"]
+    assert most_relevant["index"] == 2
+    assert least_relevant["index"] == 3
+
+
+def test_rerank_tei_format():
+    global server
+    server.start()
+    res = server.make_request("POST", "/rerank", data={
+        "query": "Machine learning is",
+        "texts": TEST_DOCUMENTS,
+    })
+    assert res.status_code == 200
+    assert len(res.body) == 4
+
+    most_relevant = res.body[0]
+    least_relevant = res.body[0]
+    for doc in res.body:
+        if doc["score"] > most_relevant["score"]:
+            most_relevant = doc
+        if doc["score"] < least_relevant["score"]:
+            least_relevant = doc
+
+    assert most_relevant["score"] > least_relevant["score"]
+    assert most_relevant["index"] == 2
+    assert least_relevant["index"] == 3
+
+
+@pytest.mark.parametrize("documents", [
+    [],
+    None,
+    123,
+    [1, 2, 3],
+])
+def test_invalid_rerank_req(documents):
+    global server
+    server.start()
+    res = server.make_request("POST", "/rerank", data={
+        "query": "Machine learning is",
+        "documents": documents,
+    })
+    assert res.status_code == 400
+    assert "error" in res.body
+
+
+@pytest.mark.parametrize(
+    "query,doc1,doc2,n_tokens",
+    [
+        ("Machine learning is", "A machine", "Learning is", 19),
+        ("Which city?", "Machine learning is ", "Paris, capitale de la", 26),
+    ]
+)
+def test_rerank_usage(query, doc1, doc2, n_tokens):
+    global server
+    server.start()
+
+    res = server.make_request("POST", "/rerank", data={
+        "query": query,
+        "documents": [
+            doc1,
+            doc2,
+        ]
+    })
+    assert res.status_code == 200
+    assert res.body['usage']['prompt_tokens'] == res.body['usage']['total_tokens']
+    assert res.body['usage']['prompt_tokens'] == n_tokens

tools/server/tests/unit/test_security.py

@@ -0,0 +1,83 @@
+import pytest
+from openai import OpenAI
+from utils import *
+
+server = ServerPreset.tinyllama2()
+
+TEST_API_KEY = "sk-this-is-the-secret-key"
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+    server.api_key = TEST_API_KEY
+
+
+@pytest.mark.parametrize("endpoint", ["/health", "/models"])
+def test_access_public_endpoint(endpoint: str):
+    global server
+    server.start()
+    res = server.make_request("GET", endpoint)
+    assert res.status_code == 200
+    assert "error" not in res.body
+
+
+@pytest.mark.parametrize("api_key", [None, "invalid-key"])
+def test_incorrect_api_key(api_key: str):
+    global server
+    server.start()
+    res = server.make_request("POST", "/completions", data={
+        "prompt": "I believe the meaning of life is",
+    }, headers={
+        "Authorization": f"Bearer {api_key}" if api_key else None,
+    })
+    assert res.status_code == 401
+    assert "error" in res.body
+    assert res.body["error"]["type"] == "authentication_error"
+
+
+def test_correct_api_key():
+    global server
+    server.start()
+    res = server.make_request("POST", "/completions", data={
+        "prompt": "I believe the meaning of life is",
+    }, headers={
+        "Authorization": f"Bearer {TEST_API_KEY}",
+    })
+    assert res.status_code == 200
+    assert "error" not in res.body
+    assert "content" in res.body
+
+
+def test_openai_library_correct_api_key():
+    global server
+    server.start()
+    client = OpenAI(api_key=TEST_API_KEY, base_url=f"http://{server.server_host}:{server.server_port}")
+    res = client.chat.completions.create(
+        model="gpt-3.5-turbo",
+        messages=[
+            {"role": "system", "content": "You are a chatbot."},
+            {"role": "user", "content": "What is the meaning of life?"},
+        ],
+    )
+    assert len(res.choices) == 1
+
+
+@pytest.mark.parametrize("origin,cors_header,cors_header_value", [
+    ("localhost", "Access-Control-Allow-Origin", "localhost"),
+    ("web.mydomain.fr", "Access-Control-Allow-Origin", "web.mydomain.fr"),
+    ("origin", "Access-Control-Allow-Credentials", "true"),
+    ("web.mydomain.fr", "Access-Control-Allow-Methods", "GET, POST"),
+    ("web.mydomain.fr", "Access-Control-Allow-Headers", "*"),
+])
+def test_cors_options(origin: str, cors_header: str, cors_header_value: str):
+    global server
+    server.start()
+    res = server.make_request("OPTIONS", "/completions", headers={
+        "Origin": origin,
+        "Access-Control-Request-Method": "POST",
+        "Access-Control-Request-Headers": "Authorization",
+    })
+    assert res.status_code == 200
+    assert cors_header in res.headers
+    assert res.headers[cors_header] == cors_header_value

tools/server/tests/unit/test_slot_save.py

@@ -0,0 +1,98 @@
+import pytest
+from utils import *
+
+server = ServerPreset.tinyllama2()
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+    server.slot_save_path = "./tmp"
+    server.temperature = 0.0
+
+
+def test_slot_save_restore():
+    global server
+    server.start()
+
+    # First prompt in slot 1 should be fully processed
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "What is the capital of France?",
+        "id_slot": 1,
+        "cache_prompt": True,
+    })
+    assert res.status_code == 200
+    assert match_regex("(Whiskers|Flana)+", res.body["content"])
+    assert res.body["timings"]["prompt_n"] == 21  # all tokens are processed
+
+    # Save state of slot 1
+    res = server.make_request("POST", "/slots/1?action=save", data={
+        "filename": "slot1.bin",
+    })
+    assert res.status_code == 200
+    assert res.body["n_saved"] == 84
+
+    # Since we have cache, this should only process the last tokens
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "What is the capital of Germany?",
+        "id_slot": 1,
+        "cache_prompt": True,
+    })
+    assert res.status_code == 200
+    assert match_regex("(Jack|said)+", res.body["content"])
+    assert res.body["timings"]["prompt_n"] == 6  # only different part is processed
+
+    # Loading the saved cache into slot 0
+    res = server.make_request("POST", "/slots/0?action=restore", data={
+        "filename": "slot1.bin",
+    })
+    assert res.status_code == 200
+    assert res.body["n_restored"] == 84
+
+    # Since we have cache, slot 0 should only process the last tokens
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "What is the capital of Germany?",
+        "id_slot": 0,
+        "cache_prompt": True,
+    })
+    assert res.status_code == 200
+    assert match_regex("(Jack|said)+", res.body["content"])
+    assert res.body["timings"]["prompt_n"] == 6  # only different part is processed
+
+    # For verification that slot 1 was not corrupted during slot 0 load, same thing should work
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "What is the capital of Germany?",
+        "id_slot": 1,
+        "cache_prompt": True,
+    })
+    assert res.status_code == 200
+    assert match_regex("(Jack|said)+", res.body["content"])
+    assert res.body["timings"]["prompt_n"] == 1
+
+
+def test_slot_erase():
+    global server
+    server.start()
+
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "What is the capital of France?",
+        "id_slot": 1,
+        "cache_prompt": True,
+    })
+    assert res.status_code == 200
+    assert match_regex("(Whiskers|Flana)+", res.body["content"])
+    assert res.body["timings"]["prompt_n"] == 21  # all tokens are processed
+
+    # erase slot 1
+    res = server.make_request("POST", "/slots/1?action=erase")
+    assert res.status_code == 200
+
+    # re-run the same prompt, it should process all tokens again
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "What is the capital of France?",
+        "id_slot": 1,
+        "cache_prompt": True,
+    })
+    assert res.status_code == 200
+    assert match_regex("(Whiskers|Flana)+", res.body["content"])
+    assert res.body["timings"]["prompt_n"] == 21  # all tokens are processed

tools/server/tests/unit/test_speculative.py

@@ -0,0 +1,126 @@
+import pytest
+from utils import *
+
+# We use a F16 MOE gguf as main model, and q4_0 as draft model
+
+server = ServerPreset.stories15m_moe()
+
+MODEL_DRAFT_FILE_URL = "https://huggingface.co/ggml-org/models/resolve/main/tinyllamas/stories15M-q4_0.gguf"
+
+def create_server():
+    global server
+    server = ServerPreset.stories15m_moe()
+    # set default values
+    server.model_draft = download_file(MODEL_DRAFT_FILE_URL)
+    server.draft_min = 4
+    server.draft_max = 8
+
+
+@pytest.fixture(scope="module", autouse=True)
+def fixture_create_server():
+    return create_server()
+
+
+def test_with_and_without_draft():
+    global server
+    server.model_draft = None  # disable draft model
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "temperature": 0.0,
+        "top_k": 1,
+    })
+    assert res.status_code == 200
+    content_no_draft = res.body["content"]
+    server.stop()
+
+    # create new server with draft model
+    create_server()
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "I believe the meaning of life is",
+        "temperature": 0.0,
+        "top_k": 1,
+    })
+    assert res.status_code == 200
+    content_draft = res.body["content"]
+
+    assert content_no_draft == content_draft
+
+
+def test_different_draft_min_draft_max():
+    global server
+    test_values = [
+        (1, 2),
+        (1, 4),
+        (4, 8),
+        (4, 12),
+        (8, 16),
+    ]
+    last_content = None
+    for draft_min, draft_max in test_values:
+        server.stop()
+        server.draft_min = draft_min
+        server.draft_max = draft_max
+        server.start()
+        res = server.make_request("POST", "/completion", data={
+            "prompt": "I believe the meaning of life is",
+            "temperature": 0.0,
+            "top_k": 1,
+        })
+        assert res.status_code == 200
+        if last_content is not None:
+            assert last_content == res.body["content"]
+        last_content = res.body["content"]
+
+
+def test_slot_ctx_not_exceeded():
+    global server
+    server.n_ctx = 64
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "Hello " * 56,
+        "temperature": 0.0,
+        "top_k": 1,
+        "speculative.p_min": 0.0,
+    })
+    assert res.status_code == 200
+    assert len(res.body["content"]) > 0
+
+
+def test_with_ctx_shift():
+    global server
+    server.n_ctx = 64
+    server.start()
+    res = server.make_request("POST", "/completion", data={
+        "prompt": "Hello " * 56,
+        "temperature": 0.0,
+        "top_k": 1,
+        "n_predict": 64,
+        "speculative.p_min": 0.0,
+    })
+    assert res.status_code == 200
+    assert len(res.body["content"]) > 0
+    assert res.body["tokens_predicted"] == 64
+    assert res.body["truncated"] == True
+
+
+@pytest.mark.parametrize("n_slots,n_requests", [
+    (1, 2),
+    (2, 2),
+])
+def test_multi_requests_parallel(n_slots: int, n_requests: int):
+    global server
+    server.n_slots = n_slots
+    server.start()
+    tasks = []
+    for _ in range(n_requests):
+        tasks.append((server.make_request, ("POST", "/completion", {
+            "prompt": "I believe the meaning of life is",
+            "temperature": 0.0,
+            "top_k": 1,
+        })))
+    results = parallel_function_calls(tasks)
+    for res in results:
+        assert res.status_code == 200
+        assert match_regex("(wise|kind|owl|answer)+", res.body["content"])

tools/server/tests/unit/test_tokenize.py

@@ -0,0 +1,59 @@
+import pytest
+from utils import *
+
+server = ServerPreset.tinyllama2()
+
+
+@pytest.fixture(scope="module", autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+
+
+def test_tokenize_detokenize():
+    global server
+    server.start()
+    # tokenize
+    content = "What is the capital of France ?"
+    res_tok = server.make_request("POST", "/tokenize", data={
+        "content": content
+    })
+    assert res_tok.status_code == 200
+    assert len(res_tok.body["tokens"]) > 5
+    # detokenize
+    res_detok = server.make_request("POST", "/detokenize", data={
+        "tokens": res_tok.body["tokens"],
+    })
+    assert res_detok.status_code == 200
+    assert res_detok.body["content"].strip() == content
+
+
+def test_tokenize_with_bos():
+    global server
+    server.start()
+    # tokenize
+    content = "What is the capital of France ?"
+    bosId = 1
+    res_tok = server.make_request("POST", "/tokenize", data={
+        "content": content,
+        "add_special": True,
+    })
+    assert res_tok.status_code == 200
+    assert res_tok.body["tokens"][0] == bosId
+
+
+def test_tokenize_with_pieces():
+    global server
+    server.start()
+    # tokenize
+    content = "This is a test string with unicode 媽 and emoji 🤗"
+    res_tok = server.make_request("POST", "/tokenize", data={
+        "content": content,
+        "with_pieces": True,
+    })
+    assert res_tok.status_code == 200
+    for token in res_tok.body["tokens"]:
+        assert "id" in token
+        assert token["id"] > 0
+        assert "piece" in token
+        assert len(token["piece"]) > 0

tools/server/tests/unit/test_tool_call.py

@@ -0,0 +1,606 @@
+#!/usr/bin/env python
+import pytest
+
+# ensure grandparent path is in sys.path
+from pathlib import Path
+import sys
+path = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(path))
+
+from utils import *
+
+server: ServerProcess
+
+TIMEOUT_SERVER_START = 15*60
+TIMEOUT_HTTP_REQUEST = 60
+
+@pytest.fixture(autouse=True)
+def create_server():
+    global server
+    server = ServerPreset.tinyllama2()
+    server.model_alias = "tinyllama-2-tool-call"
+    server.server_port = 8081
+
+
+TEST_TOOL = {
+    "type":"function",
+    "function": {
+        "name": "test",
+        "description": "",
+        "parameters": {
+            "type": "object",
+            "properties": {
+                "success": {"type": "boolean", "const": True},
+            },
+            "required": ["success"]
+        }
+    }
+}
+
+PYTHON_TOOL = {
+    "type": "function",
+    "function": {
+        "name": "python",
+        "description": "Runs code in an ipython interpreter and returns the result of the execution after 60 seconds.",
+        "parameters": {
+            "type": "object",
+            "properties": {
+                "code": {
+                    "type": "string",
+                    "description": "The code to run in the ipython interpreter."
+                }
+            },
+            "required": ["code"]
+        }
+    }
+}
+
+WEATHER_TOOL = {
+  "type":"function",
+  "function":{
+    "name":"get_current_weather",
+    "description":"Get the current weather in a given location",
+    "parameters":{
+      "type":"object",
+      "properties":{
+        "location":{
+          "type":"string",
+          "description":"The city and country/state, e.g. 'San Francisco, CA', or 'Paris, France'"
+        }
+      },
+      "required":["location"]
+    }
+  }
+}
+
+
+def do_test_completion_with_required_tool_tiny(server: ServerProcess, tool: dict, argument_key: str | None, n_predict, **kwargs):
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "max_tokens": n_predict,
+        "messages": [
+            {"role": "system", "content": "You are a coding assistant."},
+            {"role": "user", "content": "Write an example"},
+        ],
+        "tool_choice": "required",
+        "tools": [tool],
+        "parallel_tool_calls": False,
+        **kwargs,
+    })
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    tool_calls = choice["message"].get("tool_calls")
+    assert tool_calls and len(tool_calls) == 1, f'Expected 1 tool call in {choice["message"]}'
+    tool_call = tool_calls[0]
+    assert choice["message"].get("content") in (None, ""), f'Expected no content in {choice["message"]}'
+    assert len(tool_call.get("id", "")) > 0, f'Expected non empty tool call id in {tool_call}'
+    expected_function_name = "python" if tool["type"] == "code_interpreter" else tool["function"]["name"]
+    assert expected_function_name == tool_call["function"]["name"]
+    actual_arguments = tool_call["function"]["arguments"]
+    assert isinstance(actual_arguments, str)
+    if argument_key is not None:
+        actual_arguments = json.loads(actual_arguments)
+        assert argument_key in actual_arguments, f"tool arguments: {json.dumps(actual_arguments)}, expected: {argument_key}"
+
+
+@pytest.mark.parametrize("template_name,tool,argument_key", [
+    ("google-gemma-2-2b-it",                          TEST_TOOL,            "success"),
+    ("meta-llama-Llama-3.3-70B-Instruct",             TEST_TOOL,            "success"),
+    ("meta-llama-Llama-3.3-70B-Instruct",             PYTHON_TOOL,          "code"),
+])
+def test_completion_with_required_tool_tiny_fast(template_name: str, tool: dict, argument_key: str | None):
+    global server
+    n_predict = 512
+    # server = ServerPreset.stories15m_moe()
+    server.jinja = True
+    server.n_predict = n_predict
+    server.chat_template_file = f'../../../models/templates/{template_name}.jinja'
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    do_test_completion_with_required_tool_tiny(server, tool, argument_key, n_predict, temperature=0.0, top_k=1, top_p=1.0)
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("template_name,tool,argument_key", [
+    ("meta-llama-Llama-3.1-8B-Instruct",              TEST_TOOL,            "success"),
+    ("meta-llama-Llama-3.1-8B-Instruct",              PYTHON_TOOL,          "code"),
+    ("meetkai-functionary-medium-v3.1",               TEST_TOOL,            "success"),
+    ("meetkai-functionary-medium-v3.1",               PYTHON_TOOL,          "code"),
+    ("meetkai-functionary-medium-v3.2",               TEST_TOOL,            "success"),
+    ("meetkai-functionary-medium-v3.2",               PYTHON_TOOL,          "code"),
+    ("NousResearch-Hermes-2-Pro-Llama-3-8B-tool_use", TEST_TOOL,            "success"),
+    ("NousResearch-Hermes-2-Pro-Llama-3-8B-tool_use", PYTHON_TOOL,          "code"),
+    ("meta-llama-Llama-3.2-3B-Instruct",              TEST_TOOL,            "success"),
+    ("meta-llama-Llama-3.2-3B-Instruct",              PYTHON_TOOL,          "code"),
+    ("mistralai-Mistral-Nemo-Instruct-2407",          TEST_TOOL,            "success"),
+    ("mistralai-Mistral-Nemo-Instruct-2407",          PYTHON_TOOL,          "code"),
+    ("NousResearch-Hermes-3-Llama-3.1-8B-tool_use",   TEST_TOOL,            "success"),
+    ("NousResearch-Hermes-3-Llama-3.1-8B-tool_use",   PYTHON_TOOL,          "code"),
+    ("deepseek-ai-DeepSeek-R1-Distill-Llama-8B",      TEST_TOOL,            "success"),
+    ("deepseek-ai-DeepSeek-R1-Distill-Llama-8B",      PYTHON_TOOL,          "code"),
+    ("fireworks-ai-llama-3-firefunction-v2",          TEST_TOOL,            "success"),
+    # ("fireworks-ai-llama-3-firefunction-v2",          PYTHON_TOOL,          "code"),
+])
+def test_completion_with_required_tool_tiny_slow(template_name: str, tool: dict, argument_key: str | None):
+    global server
+    n_predict = 512
+    # server = ServerPreset.stories15m_moe()
+    server.jinja = True
+    server.n_predict = n_predict
+    server.chat_template_file = f'../../../models/templates/{template_name}.jinja'
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    do_test_completion_with_required_tool_tiny(server, tool, argument_key, n_predict)
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("tool,argument_key,hf_repo,template_override", [
+    (TEST_TOOL,    "success",  "bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", None),
+    (PYTHON_TOOL,  "code",     "bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", None),
+    (PYTHON_TOOL,  "code",     "bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/gemma-2-2b-it-GGUF:Q4_K_M",              None),
+    (PYTHON_TOOL,  "code",     "bartowski/gemma-2-2b-it-GGUF:Q4_K_M",              None),
+    (PYTHON_TOOL,  "code",     "bartowski/gemma-2-2b-it-GGUF:Q4_K_M",              "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      None),
+    (PYTHON_TOOL,  "code",     "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      None),
+    (PYTHON_TOOL,  "code",     "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Qwen2.5-1.5B-Instruct-GGUF:Q4_K_M",      None),
+    (PYTHON_TOOL,  "code",     "bartowski/Qwen2.5-1.5B-Instruct-GGUF:Q4_K_M",      None),
+    (PYTHON_TOOL,  "code",     "bartowski/Qwen2.5-1.5B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M",      None),
+    (PYTHON_TOOL,  "code",     "bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M",      None),
+    (PYTHON_TOOL,  "code",     "bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        None),
+    (PYTHON_TOOL,  "code",     "bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        None),
+    (PYTHON_TOOL,  "code",     "bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M", ("NousResearch/Hermes-2-Pro-Llama-3-8B", "tool_use")),
+    (PYTHON_TOOL,  "code",     "bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M", ("NousResearch/Hermes-2-Pro-Llama-3-8B", "tool_use")),
+    (PYTHON_TOOL,  "code",     "bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M", "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",   ("NousResearch/Hermes-3-Llama-3.1-8B", "tool_use")),
+    (PYTHON_TOOL,  "code",     "bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",   ("NousResearch/Hermes-3-Llama-3.1-8B", "tool_use")),
+    (PYTHON_TOOL,  "code",     "bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",   "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", None),
+    (PYTHON_TOOL,  "code",     "bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", None),
+    (PYTHON_TOOL,  "code",     "bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/functionary-small-v3.2-GGUF:Q4_K_M",       ("meetkai/functionary-medium-v3.2", None)),
+    (PYTHON_TOOL,  "code",     "bartowski/functionary-small-v3.2-GGUF:Q4_K_M",       ("meetkai/functionary-medium-v3.2", None)),
+    (PYTHON_TOOL,  "code",     "bartowski/functionary-small-v3.2-GGUF:Q4_K_M",       "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      ("meta-llama/Llama-3.2-3B-Instruct", None)),
+    (PYTHON_TOOL,  "code",     "bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      ("meta-llama/Llama-3.2-3B-Instruct", None)),
+    (PYTHON_TOOL,  "code",     "bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/Llama-3.2-1B-Instruct-GGUF:Q4_K_M",      ("meta-llama/Llama-3.2-3B-Instruct", None)),
+    (PYTHON_TOOL,  "code",     "bartowski/Llama-3.2-1B-Instruct-GGUF:Q4_K_M",      ("meta-llama/Llama-3.2-3B-Instruct", None)),
+    (PYTHON_TOOL,  "code",     "bartowski/Llama-3.2-1B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    (TEST_TOOL,    "success",  "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+    (PYTHON_TOOL,  "code",     "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+])
+def test_completion_with_required_tool_real_model(tool: dict, argument_key: str | None, hf_repo: str, template_override: str | Tuple[str, str | None] | None):
+    global server
+    n_predict = 512
+    server.n_slots = 1
+    server.jinja = True
+    server.n_ctx = 8192
+    server.n_predict = n_predict
+    server.model_hf_repo = hf_repo
+    server.model_hf_file = None
+    if isinstance(template_override, tuple):
+        (template_hf_repo, template_variant) = template_override
+        server.chat_template_file = f"../../../models/templates/{template_hf_repo.replace('/', '-') + ('-' + template_variant if template_variant else '')}.jinja"
+        assert os.path.exists(server.chat_template_file), f"Template file {server.chat_template_file} does not exist. Run `python scripts/get_chat_template.py {template_hf_repo} {template_variant} > {server.chat_template_file}` to download the template."
+    elif isinstance(template_override, str):
+        server.chat_template = template_override
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "max_tokens": n_predict,
+        "messages": [
+            {"role": "system", "content": "You are a coding assistant."},
+            {"role": "user", "content": "Write an example"},
+        ],
+        "tool_choice": "required",
+        "tools": [tool],
+        "parallel_tool_calls": False,
+        "temperature": 0.0,
+        "top_k": 1,
+        "top_p": 1.0,
+    }, timeout=TIMEOUT_HTTP_REQUEST)
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    tool_calls = choice["message"].get("tool_calls")
+    assert tool_calls and len(tool_calls) == 1, f'Expected 1 tool call in {choice["message"]}'
+    tool_call = tool_calls[0]
+    # assert choice["message"].get("content") in (None, ""), f'Expected no content in {choice["message"]}'
+    expected_function_name = "python" if tool["type"] == "code_interpreter" else tool["function"]["name"]
+    assert expected_function_name == tool_call["function"]["name"]
+    actual_arguments = tool_call["function"]["arguments"]
+    assert isinstance(actual_arguments, str)
+    if argument_key is not None:
+        actual_arguments = json.loads(actual_arguments)
+        assert argument_key in actual_arguments, f"tool arguments: {json.dumps(actual_arguments)}, expected: {argument_key}"
+
+
+def do_test_completion_without_tool_call(server: ServerProcess, n_predict: int, tools: list[dict], tool_choice: str | None, **kwargs):
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "max_tokens": n_predict,
+        "messages": [
+            {"role": "system", "content": "You are a coding assistant."},
+            {"role": "user", "content": "say hello world with python"},
+        ],
+        "tools": tools if tools else None,
+        "tool_choice": tool_choice,
+        **kwargs,
+    }, timeout=TIMEOUT_HTTP_REQUEST)
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    assert choice["message"].get("tool_calls") is None, f'Expected no tool call in {choice["message"]}'
+
+
+@pytest.mark.parametrize("template_name,n_predict,tools,tool_choice", [
+    ("meta-llama-Llama-3.3-70B-Instruct",         128, [],            None),
+    ("meta-llama-Llama-3.3-70B-Instruct",         128, [TEST_TOOL],   None),
+    ("meta-llama-Llama-3.3-70B-Instruct",         128, [PYTHON_TOOL], 'none'),
+])
+def test_completion_without_tool_call_fast(template_name: str, n_predict: int, tools: list[dict], tool_choice: str | None):
+    global server
+    server.jinja = True
+    server.n_predict = n_predict
+    server.chat_template_file = f'../../../models/templates/{template_name}.jinja'
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    do_test_completion_without_tool_call(server, n_predict, tools, tool_choice)
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("template_name,n_predict,tools,tool_choice", [
+    ("meetkai-functionary-medium-v3.2",               256, [],            None),
+    ("meetkai-functionary-medium-v3.2",               256, [TEST_TOOL],   None),
+    ("meetkai-functionary-medium-v3.2",               256, [PYTHON_TOOL], 'none'),
+    ("meetkai-functionary-medium-v3.1",               256, [],            None),
+    ("meetkai-functionary-medium-v3.1",               256, [TEST_TOOL],   None),
+    ("meetkai-functionary-medium-v3.1",               256, [PYTHON_TOOL], 'none'),
+    ("meta-llama-Llama-3.2-3B-Instruct",              256, [],            None),
+    ("meta-llama-Llama-3.2-3B-Instruct",              256, [TEST_TOOL],   None),
+    ("meta-llama-Llama-3.2-3B-Instruct",              256, [PYTHON_TOOL], 'none'),
+])
+def test_completion_without_tool_call_slow(template_name: str, n_predict: int, tools: list[dict], tool_choice: str | None):
+    global server
+    server.jinja = True
+    server.n_predict = n_predict
+    server.chat_template_file = f'../../../models/templates/{template_name}.jinja'
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    do_test_completion_without_tool_call(server, n_predict, tools, tool_choice)
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("hf_repo,template_override", [
+    ("bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", None),
+    ("bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", "chatml"),
+
+    ("bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      None),
+    ("bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/Qwen2.5-1.5B-Instruct-GGUF:Q4_K_M",      None),
+    ("bartowski/Qwen2.5-1.5B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M",      None),
+    ("bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        None),
+    ("bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        "chatml"),
+
+    ("bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M",    ("NousResearch/Hermes-2-Pro-Llama-3-8B", "tool_use")),
+    ("bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M",    "chatml"),
+
+    ("bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",      ("NousResearch/Hermes-3-Llama-3.1-8B", "tool_use")),
+    ("bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", None),
+    ("bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", "chatml"),
+
+    ("bartowski/functionary-small-v3.2-GGUF:Q8_0",       ("meetkai/functionary-medium-v3.2", None)),
+    ("bartowski/functionary-small-v3.2-GGUF:Q8_0",       "chatml"),
+
+    ("bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      ("meta-llama/Llama-3.2-3B-Instruct", None)),
+    ("bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/c4ai-command-r7b-12-2024-GGUF:Q6_K_L",   ("CohereForAI/c4ai-command-r7b-12-2024", "tool_use")),
+
+    ("bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+
+    # Note: gemma-2-2b-it knows itself as "model", not "assistant", so we don't test the ill-suited chatml on it.
+    ("bartowski/gemma-2-2b-it-GGUF:Q4_K_M",              None),
+
+    # ("bartowski/Llama-3.2-1B-Instruct-GGUF:Q4_K_M", ("meta-llama/Llama-3.2-3B-Instruct", None)),
+])
+def test_weather(hf_repo: str, template_override: str | Tuple[str, str | None] | None):
+    global server
+    n_predict = 512
+    server.n_slots = 1
+    server.jinja = True
+    server.n_ctx = 8192
+    server.n_predict = n_predict
+    server.model_hf_repo = hf_repo
+    server.model_hf_file = None
+    if isinstance(template_override, tuple):
+        (template_hf_repo, template_variant) = template_override
+        server.chat_template_file = f"../../../models/templates/{template_hf_repo.replace('/', '-') + ('-' + template_variant if template_variant else '')}.jinja"
+        assert os.path.exists(server.chat_template_file), f"Template file {server.chat_template_file} does not exist. Run `python scripts/get_chat_template.py {template_hf_repo} {template_variant} > {server.chat_template_file}` to download the template."
+    elif isinstance(template_override, str):
+        server.chat_template = template_override
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    do_test_weather(server, max_tokens=n_predict)
+
+
+def do_test_weather(server: ServerProcess, **kwargs):
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "messages": [
+            {"role": "system", "content": "You are a chatbot that uses tools/functions. Dont overthink things."},
+            {"role": "user", "content": "What is the weather in Istanbul?"},
+        ],
+        "tools": [WEATHER_TOOL],
+        **kwargs,
+    }, timeout=TIMEOUT_HTTP_REQUEST)
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    tool_calls = choice["message"].get("tool_calls")
+    assert tool_calls and len(tool_calls) == 1, f'Expected 1 tool call in {choice["message"]}'
+    tool_call = tool_calls[0]
+    # assert choice["message"].get("content") in (None, ""), f'Expected no content in {choice["message"]}'
+    assert tool_call["function"]["name"] == WEATHER_TOOL["function"]["name"], f'Expected weather tool call, got {tool_call["function"]["name"]}'
+    assert len(tool_call.get("id", "")) > 0, f'Expected non empty tool call id in {tool_call}'
+    actual_arguments = json.loads(tool_call["function"]["arguments"])
+    assert 'location' in actual_arguments, f"location not found in {json.dumps(actual_arguments)}"
+    location = actual_arguments["location"]
+    assert isinstance(location, str), f"Expected location to be a string, got {type(location)}: {json.dumps(location)}"
+    assert re.match('^Istanbul(( |, ?)(TR|Turkey|Türkiye))?$', location), f'Expected Istanbul for location, got {location}'
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("result_override,n_predict,hf_repo,template_override", [
+    (None,                                           128,  "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",       "chatml"),
+    (None,                                           128,  "bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M", None),
+    (None,                                           128,  "bartowski/Qwen2.5-Coder-3B-Instruct-GGUF:Q4_K_M", "chatml"),
+    (None,                                           128,  "bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",         "chatml"),
+    (None,                                           128,  "bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M",     ("NousResearch/Hermes-2-Pro-Llama-3-8B", "tool_use")),
+    (None,                                           128,  "bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",       ("NousResearch/Hermes-3-Llama-3.1-8B", "tool_use")),
+    (None,                                           128,  "bartowski/functionary-small-v3.2-GGUF:Q8_0",        ("meetkai/functionary-medium-v3.2", None)),
+    (None,                                           128,  "bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M",  None),
+    (None,                                           128,  "bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M",  "chatml"),
+    (None,                                           128,  "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",       None),
+    ("[\\s\\S]*?\\*\\*\\s*0.5($|\\*\\*)",            8192, "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", ("llama-cpp-deepseek-r1", None)),
+
+    # TODO: fix these (wrong results, either didn't respect decimal instruction or got wrong value)
+    # (None,                                           128,  "bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M",  None),
+    # ("[\\s\\S]*?\\*\\*\\s*0.5($|\\*\\*)",            8192, "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+])
+def test_calc_result(result_override: str | None, n_predict: int, hf_repo: str, template_override: str | Tuple[str, str | None] | None):
+    global server
+    server.n_slots = 1
+    server.jinja = True
+    server.n_ctx = 8192 * 2
+    server.n_predict = n_predict
+    server.model_hf_repo = hf_repo
+    server.model_hf_file = None
+    if isinstance(template_override, tuple):
+        (template_hf_repo, template_variant) = template_override
+        server.chat_template_file = f"../../../models/templates/{template_hf_repo.replace('/', '-') + ('-' + template_variant if template_variant else '')}.jinja"
+        assert os.path.exists(server.chat_template_file), f"Template file {server.chat_template_file} does not exist. Run `python scripts/get_chat_template.py {template_hf_repo} {template_variant} > {server.chat_template_file}` to download the template."
+    elif isinstance(template_override, str):
+        server.chat_template = template_override
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    do_test_calc_result(server, result_override, n_predict)
+
+
+def do_test_calc_result(server: ServerProcess, result_override: str | None, n_predict: int, **kwargs):
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "max_tokens": n_predict,
+        "messages": [
+            {"role": "system", "content": "You are a tools-calling assistant. You express numerical values with at most two decimals."},
+            {"role": "user", "content": "What's the y coordinate of a point on the unit sphere at angle 30 degrees?"},
+            {
+                "role": "assistant",
+                "content": None,
+                "tool_calls": [
+                    {
+                        "id": "call_6789",
+                        "type": "function",
+                        "function": {
+                            "name": "calculate",
+                            "arguments": "{\"expression\":\"sin(30 * pi / 180)\"}"
+                        }
+                    }
+                ]
+            },
+            {
+                "role": "tool",
+                "name": "calculate",
+                "content": "0.55644242476",
+                "tool_call_id": "call_6789"
+            }
+        ],
+        "tools": [
+            {
+                "type":"function",
+                "function":{
+                    "name":"calculate",
+                    "description":"A calculator function that computes values of arithmetic expressions in the Python syntax",
+                    "parameters":{
+                        "type":"object",
+                        "properties":{
+                            "expression":{
+                            "type":"string",
+                            "description":"An arithmetic expression to compute the value of (Python syntad, assuming all floats)"
+                            }
+                        },
+                        "required":["expression"]
+                    }
+                }
+            }
+        ],
+        **kwargs,
+    }, timeout=TIMEOUT_HTTP_REQUEST)
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    tool_calls = choice["message"].get("tool_calls")
+    assert tool_calls is None, f'Expected no tool call in {choice["message"]}'
+    content = choice["message"].get("content")
+    assert content is not None, f'Expected content in {choice["message"]}'
+    if result_override is not None:
+        assert re.match(result_override, content), f'Expected {result_override}, got {content}'
+    else:
+        assert re.match('^[\\s\\S]*?((That\'s|\\bis) (approximately )?)?\\b0\\.(5\\b|56\\b|556)', content), \
+            f'Expected something like "The y coordinate is 0.56.", got {content}'
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("n_predict,reasoning_format,expect_content,expect_reasoning_content,hf_repo,template_override", [
+    (128, 'deepseek',  "^The sum of 102 and 7 is 109[\\s\\S]*",                        None,                                          "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",       None),
+    (128,  None,        "^The sum of 102 and 7 is 109[\\s\\S]*",                       None,                                          "bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",       None),
+
+    (1024, 'deepseek',  "To find the sum of[\\s\\S]*",                                 "I need to calculate the sum of 102 and 7[\\s\\S]*",  "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+    (1024, 'none',      "^(<think>\\s*)?I need[\\s\\S]*?</think>\\s*To find[\\s\\S]*",                None,                                          "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+
+    (1024, 'deepseek',  "To find the sum of[\\s\\S]*",                                 "First, I [\\s\\S]*",                          "bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", ("llama-cpp-deepseek-r1", None)),
+])
+def test_thoughts(n_predict: int, reasoning_format: Literal['deepseek', 'none'] | None, expect_content: str | None, expect_reasoning_content: str | None, hf_repo: str, template_override: str | Tuple[str, str | None] | None):
+    global server
+    server.n_slots = 1
+    server.reasoning_format = reasoning_format
+    server.jinja = True
+    server.n_ctx = 8192 * 2
+    server.n_predict = n_predict
+    server.model_hf_repo = hf_repo
+    server.model_hf_file = None
+    if isinstance(template_override, tuple):
+        (template_hf_repo, template_variant) = template_override
+        server.chat_template_file = f"../../../models/templates/{template_hf_repo.replace('/', '-') + ('-' + template_variant if template_variant else '')}.jinja"
+        assert os.path.exists(server.chat_template_file), f"Template file {server.chat_template_file} does not exist. Run `python scripts/get_chat_template.py {template_hf_repo} {template_variant} > {server.chat_template_file}` to download the template."
+    elif isinstance(template_override, str):
+        server.chat_template = template_override
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "max_tokens": n_predict,
+        "messages": [
+            {"role": "user", "content": "What's the sum of 102 and 7?"},
+        ]
+    }, timeout=TIMEOUT_HTTP_REQUEST)
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    assert choice["message"].get("tool_calls") is None, f'Expected no tool call in {choice["message"]}'
+
+    content = choice["message"].get("content")
+    if expect_content is None:
+        assert choice["message"].get("content") in (None, ""), f'Expected no content in {choice["message"]}'
+    else:
+        assert re.match(expect_content, content), f'Expected {expect_content}, got {content}'
+
+    reasoning_content = choice["message"].get("reasoning_content")
+    if expect_reasoning_content is None:
+        assert reasoning_content is None, f'Expected no reasoning content in {choice["message"]}'
+    else:
+        assert re.match(expect_reasoning_content, reasoning_content), f'Expected {expect_reasoning_content}, got {reasoning_content}'
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("hf_repo,template_override", [
+    ("bartowski/DeepSeek-R1-Distill-Qwen-7B-GGUF:Q4_K_M", None),
+
+    ("bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      None),
+    ("bartowski/Phi-3.5-mini-instruct-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/functionary-small-v3.2-GGUF:Q8_0",       ("meetkai-functionary-medium-v3.2", None)),
+    ("bartowski/functionary-small-v3.2-GGUF:Q8_0",       "chatml"),
+
+    # ("bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", None),
+    ("bartowski/Meta-Llama-3.1-8B-Instruct-GGUF:Q4_K_M", "chatml"),
+
+    ("bartowski/Llama-3.2-1B-Instruct-GGUF:Q4_K_M",      ("meta-llama-Llama-3.2-3B-Instruct", None)),
+    ("bartowski/Llama-3.2-1B-Instruct-GGUF:Q4_K_M",      None),
+
+    ("bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      ("meta-llama-Llama-3.2-3B-Instruct", None)),
+    ("bartowski/Llama-3.2-3B-Instruct-GGUF:Q4_K_M",      None),
+
+    ("bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        None),
+    ("bartowski/Qwen2.5-7B-Instruct-GGUF:Q4_K_M",        "chatml"),
+
+    ("bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M",    ("NousResearch/Hermes-2-Pro-Llama-3-8B", "tool_use")),
+    ("bartowski/Hermes-2-Pro-Llama-3-8B-GGUF:Q4_K_M",    "chatml"),
+
+    ("bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",      ("NousResearch-Hermes-3-Llama-3.1-8B", "tool_use")),
+    ("bartowski/Hermes-3-Llama-3.1-8B-GGUF:Q4_K_M",      "chatml"),
+
+    ("bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", None),
+    ("bartowski/Mistral-Nemo-Instruct-2407-GGUF:Q4_K_M", "chatml"),
+
+    ("bartowski/gemma-2-2b-it-GGUF:Q4_K_M",              None),
+    ("bartowski/gemma-2-2b-it-GGUF:Q4_K_M",              "chatml"),
+])
+def test_hello_world(hf_repo: str, template_override: str | Tuple[str, str | None] | None):
+    global server
+    n_predict = 512 # High because of DeepSeek R1
+    server.n_slots = 1
+    server.jinja = True
+    server.n_ctx = 8192
+    server.n_predict = n_predict
+    server.model_hf_repo = hf_repo
+    server.model_hf_file = None
+    if isinstance(template_override, tuple):
+        (template_hf_repo, template_variant) = template_override
+        server.chat_template_file = f"../../../models/templates/{template_hf_repo.replace('/', '-') + ('-' + template_variant if template_variant else '')}.jinja"
+        assert os.path.exists(server.chat_template_file), f"Template file {server.chat_template_file} does not exist. Run `python scripts/get_chat_template.py {template_hf_repo} {template_variant} > {server.chat_template_file}` to download the template."
+    elif isinstance(template_override, str):
+        server.chat_template = template_override
+    server.start(timeout_seconds=TIMEOUT_SERVER_START)
+
+    do_test_hello_world(server, max_tokens=n_predict)
+
+
+def do_test_hello_world(server: ServerProcess, **kwargs):
+    res = server.make_request("POST", "/v1/chat/completions", data={
+        "messages": [
+            {"role": "system", "content": "You are a tool-calling agent."},
+            {"role": "user", "content": "say hello world with python"},
+        ],
+        "tools": [PYTHON_TOOL],
+        **kwargs,
+    }, timeout=TIMEOUT_HTTP_REQUEST)
+    assert res.status_code == 200, f"Expected status code 200, got {res.status_code}"
+    choice = res.body["choices"][0]
+    tool_calls = choice["message"].get("tool_calls")
+    assert tool_calls and len(tool_calls) == 1, f'Expected 1 tool call in {choice["message"]}'
+    tool_call = tool_calls[0]
+    # assert choice["message"].get("content") in (None, ""), f'Expected no content in {choice["message"]}'
+    assert tool_call["function"]["name"] == PYTHON_TOOL["function"]["name"]
+    assert len(tool_call.get("id", "")) > 0, f'Expected non empty tool call id in {tool_call}'
+    actual_arguments = json.loads(tool_call["function"]["arguments"])
+    assert 'code' in actual_arguments, f"code not found in {json.dumps(actual_arguments)}"
+    code = actual_arguments["code"]
+    assert isinstance(code, str), f"Expected code to be a string, got {type(code)}: {json.dumps(code)}"
+    assert re.match(r'''print\(("[Hh]ello,? [Ww]orld!?"|'[Hh]ello,? [Ww]orld!?')\)''', code), f'Expected hello world, got {code}'

tools/server/tests/utils.py

@@ -0,0 +1,452 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# type: ignore[reportUnusedImport]
+
+import subprocess
+import os
+import re
+import json
+import sys
+import requests
+import time
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from typing import (
+    Any,
+    Callable,
+    ContextManager,
+    Iterable,
+    Iterator,
+    List,
+    Literal,
+    Tuple,
+    Set,
+)
+from re import RegexFlag
+import wget
+
+
+DEFAULT_HTTP_TIMEOUT = 12
+
+if "LLAMA_SANITIZE" in os.environ or "GITHUB_ACTION" in os.environ:
+    DEFAULT_HTTP_TIMEOUT = 30
+
+
+class ServerResponse:
+    headers: dict
+    status_code: int
+    body: dict | Any
+
+
+class ServerProcess:
+    # default options
+    debug: bool = False
+    server_port: int = 8080
+    server_host: str = "127.0.0.1"
+    model_hf_repo: str = "ggml-org/models"
+    model_hf_file: str | None = "tinyllamas/stories260K.gguf"
+    model_alias: str = "tinyllama-2"
+    temperature: float = 0.8
+    seed: int = 42
+
+    # custom options
+    model_alias: str | None = None
+    model_url: str | None = None
+    model_file: str | None = None
+    model_draft: str | None = None
+    n_threads: int | None = None
+    n_gpu_layer: int | None = None
+    n_batch: int | None = None
+    n_ubatch: int | None = None
+    n_ctx: int | None = None
+    n_ga: int | None = None
+    n_ga_w: int | None = None
+    n_predict: int | None = None
+    n_prompts: int | None = 0
+    slot_save_path: str | None = None
+    id_slot: int | None = None
+    cache_prompt: bool | None = None
+    n_slots: int | None = None
+    ctk: str | None = None
+    ctv: str | None = None
+    fa: bool | None = None
+    server_continuous_batching: bool | None = False
+    server_embeddings: bool | None = False
+    server_reranking: bool | None = False
+    server_metrics: bool | None = False
+    server_slots: bool | None = False
+    pooling: str | None = None
+    draft: int | None = None
+    api_key: str | None = None
+    lora_files: List[str] | None = None
+    disable_ctx_shift: int | None = False
+    draft_min: int | None = None
+    draft_max: int | None = None
+    no_webui: bool | None = None
+    jinja: bool | None = None
+    reasoning_format: Literal['deepseek', 'none'] | None = None
+    chat_template: str | None = None
+    chat_template_file: str | None = None
+    server_path: str | None = None
+
+    # session variables
+    process: subprocess.Popen | None = None
+
+    def __init__(self):
+        if "N_GPU_LAYERS" in os.environ:
+            self.n_gpu_layer = int(os.environ["N_GPU_LAYERS"])
+        if "DEBUG" in os.environ:
+            self.debug = True
+        if "PORT" in os.environ:
+            self.server_port = int(os.environ["PORT"])
+
+    def start(self, timeout_seconds: int | None = DEFAULT_HTTP_TIMEOUT) -> None:
+        if self.server_path is not None:
+            server_path = self.server_path
+        elif "LLAMA_SERVER_BIN_PATH" in os.environ:
+            server_path = os.environ["LLAMA_SERVER_BIN_PATH"]
+        elif os.name == "nt":
+            server_path = "../../../build/bin/Release/llama-server.exe"
+        else:
+            server_path = "../../../build/bin/llama-server"
+        server_args = [
+            "--host",
+            self.server_host,
+            "--port",
+            self.server_port,
+            "--temp",
+            self.temperature,
+            "--seed",
+            self.seed,
+        ]
+        if self.model_file:
+            server_args.extend(["--model", self.model_file])
+        if self.model_url:
+            server_args.extend(["--model-url", self.model_url])
+        if self.model_draft:
+            server_args.extend(["--model-draft", self.model_draft])
+        if self.model_hf_repo:
+            server_args.extend(["--hf-repo", self.model_hf_repo])
+        if self.model_hf_file:
+            server_args.extend(["--hf-file", self.model_hf_file])
+        if self.n_batch:
+            server_args.extend(["--batch-size", self.n_batch])
+        if self.n_ubatch:
+            server_args.extend(["--ubatch-size", self.n_ubatch])
+        if self.n_threads:
+            server_args.extend(["--threads", self.n_threads])
+        if self.n_gpu_layer:
+            server_args.extend(["--n-gpu-layers", self.n_gpu_layer])
+        if self.draft is not None:
+            server_args.extend(["--draft", self.draft])
+        if self.server_continuous_batching:
+            server_args.append("--cont-batching")
+        if self.server_embeddings:
+            server_args.append("--embedding")
+        if self.server_reranking:
+            server_args.append("--reranking")
+        if self.server_metrics:
+            server_args.append("--metrics")
+        if self.server_slots:
+            server_args.append("--slots")
+        if self.pooling:
+            server_args.extend(["--pooling", self.pooling])
+        if self.model_alias:
+            server_args.extend(["--alias", self.model_alias])
+        if self.n_ctx:
+            server_args.extend(["--ctx-size", self.n_ctx])
+        if self.n_slots:
+            server_args.extend(["--parallel", self.n_slots])
+        if self.ctk:
+            server_args.extend(["-ctk", self.ctk])
+        if self.ctv:
+            server_args.extend(["-ctv", self.ctv])
+        if self.fa is not None:
+            server_args.append("-fa")
+        if self.n_predict:
+            server_args.extend(["--n-predict", self.n_predict])
+        if self.slot_save_path:
+            server_args.extend(["--slot-save-path", self.slot_save_path])
+        if self.n_ga:
+            server_args.extend(["--grp-attn-n", self.n_ga])
+        if self.n_ga_w:
+            server_args.extend(["--grp-attn-w", self.n_ga_w])
+        if self.debug:
+            server_args.append("--verbose")
+        if self.lora_files:
+            for lora_file in self.lora_files:
+                server_args.extend(["--lora", lora_file])
+        if self.disable_ctx_shift:
+            server_args.extend(["--no-context-shift"])
+        if self.api_key:
+            server_args.extend(["--api-key", self.api_key])
+        if self.draft_max:
+            server_args.extend(["--draft-max", self.draft_max])
+        if self.draft_min:
+            server_args.extend(["--draft-min", self.draft_min])
+        if self.no_webui:
+            server_args.append("--no-webui")
+        if self.jinja:
+            server_args.append("--jinja")
+        if self.reasoning_format is not None:
+            server_args.extend(("--reasoning-format", self.reasoning_format))
+        if self.chat_template:
+            server_args.extend(["--chat-template", self.chat_template])
+        if self.chat_template_file:
+            server_args.extend(["--chat-template-file", self.chat_template_file])
+
+        args = [str(arg) for arg in [server_path, *server_args]]
+        print(f"tests: starting server with: {' '.join(args)}")
+
+        flags = 0
+        if "nt" == os.name:
+            flags |= subprocess.DETACHED_PROCESS
+            flags |= subprocess.CREATE_NEW_PROCESS_GROUP
+            flags |= subprocess.CREATE_NO_WINDOW
+
+        self.process = subprocess.Popen(
+            [str(arg) for arg in [server_path, *server_args]],
+            creationflags=flags,
+            stdout=sys.stdout,
+            stderr=sys.stdout,
+            env={**os.environ, "LLAMA_CACHE": "tmp"} if "LLAMA_CACHE" not in os.environ else None,
+        )
+        server_instances.add(self)
+
+        print(f"server pid={self.process.pid}, pytest pid={os.getpid()}")
+
+        # wait for server to start
+        start_time = time.time()
+        while time.time() - start_time < timeout_seconds:
+            try:
+                response = self.make_request("GET", "/health", headers={
+                    "Authorization": f"Bearer {self.api_key}" if self.api_key else None
+                })
+                if response.status_code == 200:
+                    self.ready = True
+                    return  # server is ready
+            except Exception as e:
+                pass
+            # Check if process died
+            if self.process.poll() is not None:
+                raise RuntimeError(f"Server process died with return code {self.process.returncode}")
+
+            print(f"Waiting for server to start...")
+            time.sleep(0.5)
+        raise TimeoutError(f"Server did not start within {timeout_seconds} seconds")
+
+    def stop(self) -> None:
+        if self in server_instances:
+            server_instances.remove(self)
+        if self.process:
+            print(f"Stopping server with pid={self.process.pid}")
+            self.process.kill()
+            self.process = None
+
+    def make_request(
+        self,
+        method: str,
+        path: str,
+        data: dict | Any | None = None,
+        headers: dict | None = None,
+        timeout: float | None = None,
+    ) -> ServerResponse:
+        url = f"http://{self.server_host}:{self.server_port}{path}"
+        parse_body = False
+        if method == "GET":
+            response = requests.get(url, headers=headers, timeout=timeout)
+            parse_body = True
+        elif method == "POST":
+            response = requests.post(url, headers=headers, json=data, timeout=timeout)
+            parse_body = True
+        elif method == "OPTIONS":
+            response = requests.options(url, headers=headers, timeout=timeout)
+        else:
+            raise ValueError(f"Unimplemented method: {method}")
+        result = ServerResponse()
+        result.headers = dict(response.headers)
+        result.status_code = response.status_code
+        result.body = response.json() if parse_body else None
+        print("Response from server", json.dumps(result.body, indent=2))
+        return result
+
+    def make_stream_request(
+        self,
+        method: str,
+        path: str,
+        data: dict | None = None,
+        headers: dict | None = None,
+    ) -> Iterator[dict]:
+        url = f"http://{self.server_host}:{self.server_port}{path}"
+        if method == "POST":
+            response = requests.post(url, headers=headers, json=data, stream=True)
+        else:
+            raise ValueError(f"Unimplemented method: {method}")
+        for line_bytes in response.iter_lines():
+            line = line_bytes.decode("utf-8")
+            if '[DONE]' in line:
+                break
+            elif line.startswith('data: '):
+                data = json.loads(line[6:])
+                print("Partial response from server", json.dumps(data, indent=2))
+                yield data
+
+
+server_instances: Set[ServerProcess] = set()
+
+
+class ServerPreset:
+    @staticmethod
+    def tinyllama2() -> ServerProcess:
+        server = ServerProcess()
+        server.model_hf_repo = "ggml-org/models"
+        server.model_hf_file = "tinyllamas/stories260K.gguf"
+        server.model_alias = "tinyllama-2"
+        server.n_ctx = 512
+        server.n_batch = 32
+        server.n_slots = 2
+        server.n_predict = 64
+        server.seed = 42
+        return server
+
+    @staticmethod
+    def bert_bge_small() -> ServerProcess:
+        server = ServerProcess()
+        server.model_hf_repo = "ggml-org/models"
+        server.model_hf_file = "bert-bge-small/ggml-model-f16.gguf"
+        server.model_alias = "bert-bge-small"
+        server.n_ctx = 512
+        server.n_batch = 128
+        server.n_ubatch = 128
+        server.n_slots = 2
+        server.seed = 42
+        server.server_embeddings = True
+        return server
+
+    @staticmethod
+    def bert_bge_small_with_fa() -> ServerProcess:
+        server = ServerProcess()
+        server.model_hf_repo = "ggml-org/models"
+        server.model_hf_file = "bert-bge-small/ggml-model-f16.gguf"
+        server.model_alias = "bert-bge-small"
+        server.n_ctx = 1024
+        server.n_batch = 300
+        server.n_ubatch = 300
+        server.n_slots = 2
+        server.fa = True
+        server.seed = 42
+        server.server_embeddings = True
+        return server
+
+    @staticmethod
+    def tinyllama_infill() -> ServerProcess:
+        server = ServerProcess()
+        server.model_hf_repo = "ggml-org/models"
+        server.model_hf_file = "tinyllamas/stories260K-infill.gguf"
+        server.model_alias = "tinyllama-infill"
+        server.n_ctx = 2048
+        server.n_batch = 1024
+        server.n_slots = 1
+        server.n_predict = 64
+        server.temperature = 0.0
+        server.seed = 42
+        return server
+
+    @staticmethod
+    def stories15m_moe() -> ServerProcess:
+        server = ServerProcess()
+        server.model_hf_repo = "ggml-org/stories15M_MOE"
+        server.model_hf_file = "stories15M_MOE-F16.gguf"
+        server.model_alias = "stories15m-moe"
+        server.n_ctx = 2048
+        server.n_batch = 1024
+        server.n_slots = 1
+        server.n_predict = 64
+        server.temperature = 0.0
+        server.seed = 42
+        return server
+
+    @staticmethod
+    def jina_reranker_tiny() -> ServerProcess:
+        server = ServerProcess()
+        server.model_hf_repo = "ggml-org/models"
+        server.model_hf_file = "jina-reranker-v1-tiny-en/ggml-model-f16.gguf"
+        server.model_alias = "jina-reranker"
+        server.n_ctx = 512
+        server.n_batch = 512
+        server.n_slots = 1
+        server.seed = 42
+        server.server_reranking = True
+        return server
+
+
+def parallel_function_calls(function_list: List[Tuple[Callable[..., Any], Tuple[Any, ...]]]) -> List[Any]:
+    """
+    Run multiple functions in parallel and return results in the same order as calls. Equivalent to Promise.all in JS.
+
+    Example usage:
+
+    results = parallel_function_calls([
+        (func1, (arg1, arg2)),
+        (func2, (arg3, arg4)),
+    ])
+    """
+    results = [None] * len(function_list)
+    exceptions = []
+
+    def worker(index, func, args):
+        try:
+            result = func(*args)
+            results[index] = result
+        except Exception as e:
+            exceptions.append((index, str(e)))
+
+    with ThreadPoolExecutor() as executor:
+        futures = []
+        for i, (func, args) in enumerate(function_list):
+            future = executor.submit(worker, i, func, args)
+            futures.append(future)
+
+        # Wait for all futures to complete
+        for future in as_completed(futures):
+            pass
+
+    # Check if there were any exceptions
+    if exceptions:
+        print("Exceptions occurred:")
+        for index, error in exceptions:
+            print(f"Function at index {index}: {error}")
+
+    return results
+
+
+def match_regex(regex: str, text: str) -> bool:
+    return (
+        re.compile(
+            regex, flags=RegexFlag.IGNORECASE | RegexFlag.MULTILINE | RegexFlag.DOTALL
+        ).search(text)
+        is not None
+    )
+
+
+def download_file(url: str, output_file_path: str | None = None) -> str:
+    """
+    Download a file from a URL to a local path. If the file already exists, it will not be downloaded again.
+
+    output_file_path is the local path to save the downloaded file. If not provided, the file will be saved in the root directory.
+
+    Returns the local path of the downloaded file.
+    """
+    file_name = url.split('/').pop()
+    output_file = f'./tmp/{file_name}' if output_file_path is None else output_file_path
+    if not os.path.exists(output_file):
+        print(f"Downloading {url} to {output_file}")
+        wget.download(url, out=output_file)
+        print(f"Done downloading to {output_file}")
+    else:
+        print(f"File already exists at {output_file}")
+    return output_file
+
+
+def is_slow_test_allowed():
+    return os.environ.get("SLOW_TESTS") == "1" or os.environ.get("SLOW_TESTS") == "ON"

tools/server/themes/README.md

@@ -0,0 +1,5 @@
+# LLaMA.cpp Server Wild Theme
+
+Simple themes directory of sample "public" directories. To try any of these add --path to your run like `server --path=wild`.
+
+![image](wild/wild.png)

tools/server/themes/buttons-top/README.md

@@ -0,0 +1,7 @@
+# LLaMA.cpp Server Buttons Top Theme
+
+Simple tweaks to the UI. Chat buttons at the top of the page instead of bottom so you can hit Stop instead of chasing it down the page.
+
+To use simply run server with `--path=themes/buttons_top`
+
+![image](buttons_top.png)

tools/server/themes/wild/README.md

@@ -0,0 +1,5 @@
+# LLaMA.cpp Server Wild Theme
+
+Simple tweaks to the UI. To use simply run server with `--path=themes/wild`
+
+![image](wild.png)

tools/server/utils.hpp

@@ -0,0 +1,937 @@
+#pragma once
+
+#include "common.h"
+#include "log.h"
+#include "llama.h"
+#include "base64.hpp"
+
+// increase max payload length to allow use of larger context size
+#define CPPHTTPLIB_FORM_URL_ENCODED_PAYLOAD_MAX_LENGTH 1048576
+// disable Nagle's algorithm
+#define CPPHTTPLIB_TCP_NODELAY true
+#include "httplib.h"
+
+// Change JSON_ASSERT from assert() to GGML_ASSERT:
+#define JSON_ASSERT GGML_ASSERT
+#include "json.hpp"
+#include "chat.h"
+
+#include <random>
+#include <sstream>
+#include <string>
+#include <vector>
+#include <memory>
+
+#define DEFAULT_OAICOMPAT_MODEL "gpt-3.5-turbo"
+
+using json = nlohmann::ordered_json;
+
+#define SLT_INF(slot, fmt, ...) LOG_INF("slot %12.*s: id %2d | task %d | " fmt, 12, __func__, (slot).id, (slot).id_task, __VA_ARGS__)
+#define SLT_WRN(slot, fmt, ...) LOG_WRN("slot %12.*s: id %2d | task %d | " fmt, 12, __func__, (slot).id, (slot).id_task, __VA_ARGS__)
+#define SLT_ERR(slot, fmt, ...) LOG_ERR("slot %12.*s: id %2d | task %d | " fmt, 12, __func__, (slot).id, (slot).id_task, __VA_ARGS__)
+#define SLT_DBG(slot, fmt, ...) LOG_DBG("slot %12.*s: id %2d | task %d | " fmt, 12, __func__, (slot).id, (slot).id_task, __VA_ARGS__)
+
+#define SRV_INF(fmt, ...) LOG_INF("srv  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+#define SRV_WRN(fmt, ...) LOG_WRN("srv  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+#define SRV_ERR(fmt, ...) LOG_ERR("srv  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+#define SRV_DBG(fmt, ...) LOG_DBG("srv  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+
+#define QUE_INF(fmt, ...) LOG_INF("que  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+#define QUE_WRN(fmt, ...) LOG_WRN("que  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+#define QUE_ERR(fmt, ...) LOG_ERR("que  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+#define QUE_DBG(fmt, ...) LOG_DBG("que  %12.*s: " fmt, 12, __func__, __VA_ARGS__)
+
+template <typename T>
+static T json_value(const json & body, const std::string & key, const T & default_value) {
+    // Fallback null to default value
+    if (body.contains(key) && !body.at(key).is_null()) {
+        try {
+            return body.at(key);
+        } catch (NLOHMANN_JSON_NAMESPACE::detail::type_error const &) {
+            LOG_WRN("Wrong type supplied for parameter '%s'. Expected '%s', using default value\n", key.c_str(), json(default_value).type_name());
+            return default_value;
+        }
+    } else {
+        return default_value;
+    }
+}
+
+const static std::string build_info("b" + std::to_string(LLAMA_BUILD_NUMBER) + "-" + LLAMA_COMMIT);
+
+// thin wrapper around common_grammar_trigger with (de)serialization functions
+struct server_grammar_trigger {
+    common_grammar_trigger value;
+
+    server_grammar_trigger() = default;
+    server_grammar_trigger(const common_grammar_trigger & value) : value(value) {}
+    server_grammar_trigger(const json & in) {
+        value.type = (common_grammar_trigger_type) in.at("type").get<int>();
+        value.value = in.at("value").get<std::string>();
+        if (value.type == COMMON_GRAMMAR_TRIGGER_TYPE_TOKEN) {
+            value.token = (llama_token) in.at("token").get<int>();
+        }
+    }
+
+    json to_json() const {
+        json out {
+            {"type", (int) value.type},
+            {"value", value.value},
+        };
+        if (value.type == COMMON_GRAMMAR_TRIGGER_TYPE_TOKEN) {
+            out["token"] = (int) value.token;
+        }
+        return out;
+    }
+};
+
+//
+// tokenizer and input processing utils
+//
+
+static bool json_is_array_of_numbers(const json & data) {
+    if (data.is_array()) {
+        for (const auto & e : data) {
+            if (!e.is_number_integer()) {
+                return false;
+            }
+        }
+        return true;
+    }
+    return false;
+}
+
+// is array having BOTH numbers & strings?
+static bool json_is_array_of_mixed_numbers_strings(const json & data) {
+    bool seen_string = false;
+    bool seen_number = false;
+    if (data.is_array()) {
+        for (const auto & e : data) {
+            seen_string |= e.is_string();
+            seen_number |= e.is_number_integer();
+            if (seen_number && seen_string) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+// get value by path(key1 / key2)
+static json json_get_nested_values(const std::vector<std::string> & paths, const json & js) {
+    json result = json::object();
+
+    for (const std::string & path : paths) {
+        json current = js;
+        const auto keys = string_split<std::string>(path, /*separator*/ '/');
+        bool valid_path = true;
+        for (const std::string & k : keys) {
+            if (valid_path && current.is_object() && current.contains(k)) {
+                current = current[k];
+            } else {
+                valid_path = false;
+            }
+        }
+        if (valid_path) {
+            result[path] = current;
+        }
+    }
+    return result;
+}
+
+/**
+ * this handles 2 cases:
+ * - only string, example: "string"
+ * - mixed string and tokens, example: [12, 34, "string", 56, 78]
+ */
+static llama_tokens tokenize_mixed(const llama_vocab * vocab, const json & json_prompt, bool add_special, bool parse_special) {
+    // If `add_bos` is true, we only add BOS, when json_prompt is a string,
+    // or the first element of the json_prompt array is a string.
+    llama_tokens prompt_tokens;
+
+    if (json_prompt.is_array()) {
+        bool first = true;
+        for (const auto & p : json_prompt) {
+            if (p.is_string()) {
+                auto s = p.template get<std::string>();
+
+                llama_tokens p;
+                if (first) {
+                    p = common_tokenize(vocab, s, add_special, parse_special);
+                    first = false;
+                } else {
+                    p = common_tokenize(vocab, s, false, parse_special);
+                }
+
+                prompt_tokens.insert(prompt_tokens.end(), p.begin(), p.end());
+            } else {
+                if (first) {
+                    first = false;
+                }
+
+                prompt_tokens.push_back(p.template get<llama_token>());
+            }
+        }
+    } else {
+        auto s = json_prompt.template get<std::string>();
+        prompt_tokens = common_tokenize(vocab, s, add_special, parse_special);
+    }
+
+    return prompt_tokens;
+}
+
+/**
+ * break the input "prompt" object into multiple prompt if needed, then tokenize them
+ * this supports these cases:
+ * - "prompt": "string"
+ * - "prompt": [12, 34, 56]
+ * - "prompt": [12, 34, "string", 56, 78]
+ * and multiple prompts (multi-tasks):
+ * - "prompt": ["string1", "string2"]
+ * - "prompt": ["string1", [12, 34, 56]]
+ * - "prompt": [[12, 34, 56], [78, 90, 12]]
+ * - "prompt": [[12, 34, "string", 56, 78], [12, 34, 56]]
+ */
+static std::vector<llama_tokens> tokenize_input_prompts(const llama_vocab * vocab, const json & json_prompt, bool add_special, bool parse_special) {
+    std::vector<llama_tokens> result;
+    if (json_prompt.is_string() || json_is_array_of_mixed_numbers_strings(json_prompt)) {
+        // string or mixed
+        result.push_back(tokenize_mixed(vocab, json_prompt, add_special, parse_special));
+    } else if (json_is_array_of_numbers(json_prompt)) {
+        // array of tokens
+        result.push_back(json_prompt.get<llama_tokens>());
+    } else if (json_prompt.is_array()) {
+        // array of prompts
+        result.reserve(json_prompt.size());
+        for (const auto & p : json_prompt) {
+            if (p.is_string() || json_is_array_of_mixed_numbers_strings(p)) {
+                result.push_back(tokenize_mixed(vocab, p, add_special, parse_special));
+            } else if (json_is_array_of_numbers(p)) {
+                // array of tokens
+                result.push_back(p.get<llama_tokens>());
+            } else {
+                throw std::runtime_error("element of \"prompt\" must be a string, an list of tokens, or a list of mixed strings & tokens");
+            }
+        }
+    } else {
+        throw std::runtime_error("\"prompt\" must be a string, an list of tokens, a list of mixed strings & tokens, or a list of prompts");
+    }
+    if (result.empty()) {
+        throw std::runtime_error("\"prompt\" must not be empty");
+    }
+    return result;
+}
+
+// return the last index of character that can form a valid string
+// if the last character is potentially cut in half, return the index before the cut
+// if validate_utf8(text) == text.size(), then the whole text is valid utf8
+static size_t validate_utf8(const std::string& text) {
+    size_t len = text.size();
+    if (len == 0) return 0;
+
+    // Check the last few bytes to see if a multi-byte character is cut off
+    for (size_t i = 1; i <= 4 && i <= len; ++i) {
+        unsigned char c = text[len - i];
+        // Check for start of a multi-byte sequence from the end
+        if ((c & 0xE0) == 0xC0) {
+            // 2-byte character start: 110xxxxx
+            // Needs at least 2 bytes
+            if (i < 2) return len - i;
+        } else if ((c & 0xF0) == 0xE0) {
+            // 3-byte character start: 1110xxxx
+            // Needs at least 3 bytes
+            if (i < 3) return len - i;
+        } else if ((c & 0xF8) == 0xF0) {
+            // 4-byte character start: 11110xxx
+            // Needs at least 4 bytes
+            if (i < 4) return len - i;
+        }
+    }
+
+    // If no cut-off multi-byte character is found, return full length
+    return len;
+}
+
+//
+// template utils
+//
+
+// format rerank task: [BOS]query[EOS][SEP]doc[EOS]
+static llama_tokens format_rerank(const struct llama_vocab * vocab, const llama_tokens & query, const llama_tokens & doc) {
+    llama_tokens result;
+
+    result.reserve(doc.size() + query.size() + 4);
+    result.push_back(llama_vocab_bos(vocab));
+    result.insert(result.end(), query.begin(), query.end());
+    result.push_back(llama_vocab_eos(vocab));
+    result.push_back(llama_vocab_sep(vocab));
+    result.insert(result.end(), doc.begin(), doc.end());
+    result.push_back(llama_vocab_eos(vocab));
+
+    return result;
+}
+
+// format infill task
+static llama_tokens format_infill(
+        const llama_vocab * vocab,
+        const json & input_prefix,
+        const json & input_suffix,
+        const json & input_extra,
+        const int n_batch,
+        const int n_predict,
+        const int n_ctx,
+        const bool spm_infill,
+        const llama_tokens & tokens_prompt
+    ) {
+    // TODO: optimize this block by reducing memory allocations and movement
+
+    // use FIM repo-level pattern:
+    // ref: https://arxiv.org/pdf/2409.12186
+    //
+    // [FIM_REP]myproject
+    // [FIM_SEP]filename0
+    // extra chunk 0
+    // [FIM_SEP]filename1
+    // extra chunk 1
+    // ...
+    // [FIM_SEP]filename
+    // [FIM_PRE]prefix[FIM_SUF]suffix[FIM_MID]prompt
+    //
+    llama_tokens extra_tokens;
+    extra_tokens.reserve(n_ctx);
+
+    auto tokens_prefix = tokenize_mixed(vocab, input_prefix, false, false);
+    auto tokens_suffix = tokenize_mixed(vocab, input_suffix, false, false);
+
+    if (llama_vocab_fim_rep(vocab) != LLAMA_TOKEN_NULL) {
+        // TODO: make project name an input
+        static const auto k_fim_repo = common_tokenize(vocab, "myproject\n", false, false);
+
+        extra_tokens.push_back(llama_vocab_fim_rep(vocab));
+        extra_tokens.insert(extra_tokens.end(), k_fim_repo.begin(), k_fim_repo.end());
+    }
+    for (const auto & chunk : input_extra) {
+        // { "text": string, "filename": string }
+        const std::string text     = json_value(chunk, "text",     std::string());
+        const std::string filename = json_value(chunk, "filename", std::string("tmp"));
+
+        if (llama_vocab_fim_sep(vocab) != LLAMA_TOKEN_NULL) {
+            const auto k_fim_file = common_tokenize(vocab, filename + "\n", false, false);
+
+            extra_tokens.insert(extra_tokens.end(), llama_vocab_fim_sep(vocab));
+            extra_tokens.insert(extra_tokens.end(), k_fim_file.begin(), k_fim_file.end());
+        } else {
+            // chunk separator in binary form to avoid confusing the AI
+            static const char k_chunk_prefix_str[] = {0x0a, 0x0a, 0x2d, 0x2d, 0x2d, 0x20, 0x73, 0x6e, 0x69, 0x70, 0x70, 0x65, 0x74, 0x20, 0x2d, 0x2d, 0x2d, 0x0a, 0x0a, 0x00};
+            static const auto k_chunk_prefix_tokens = common_tokenize(vocab, k_chunk_prefix_str, false, false);
+
+            extra_tokens.insert(extra_tokens.end(), k_chunk_prefix_tokens.begin(), k_chunk_prefix_tokens.end());
+        }
+
+        const auto chunk_tokens = common_tokenize(vocab, text, false, false);
+        extra_tokens.insert(extra_tokens.end(), chunk_tokens.begin(), chunk_tokens.end());
+    }
+
+    if (llama_vocab_fim_sep(vocab) != LLAMA_TOKEN_NULL) {
+        // TODO: current filename
+        static const auto k_fim_file = common_tokenize(vocab, "filename\n", false, false);
+
+        extra_tokens.insert(extra_tokens.end(), llama_vocab_fim_sep(vocab));
+        extra_tokens.insert(extra_tokens.end(), k_fim_file.begin(), k_fim_file.end());
+    }
+
+    // for now pick FIM context to fit in a batch (ratio prefix:suffix = 3:1, TODO: configurable?)
+    const int n_prefix_take = std::min<int>(tokens_prefix.size(),                3*(n_batch/4));
+    const int n_suffix_take = std::min<int>(tokens_suffix.size(), std::max<int>(0, (n_batch/4) - (2 + tokens_prompt.size())));
+
+    SRV_DBG("n_prefix_take = %d, n_suffix_take = %d, total = %d\n", n_prefix_take, n_suffix_take, (n_prefix_take + n_suffix_take));
+
+    // fill the rest of the context with extra chunks
+    const int n_extra_take = std::min<int>(std::max<int>(0, n_ctx - (n_batch) - 2*n_predict), extra_tokens.size());
+
+    tokens_prefix.erase(tokens_prefix.begin(), tokens_prefix.begin() + tokens_prefix.size() - n_prefix_take);
+    tokens_suffix.resize(n_suffix_take);
+
+    tokens_prefix.insert(tokens_prefix.begin(), llama_vocab_fim_pre(vocab));
+    tokens_prefix.insert(tokens_prefix.end(),   tokens_prompt.begin(), tokens_prompt.end());
+    tokens_suffix.insert(tokens_suffix.begin(), llama_vocab_fim_suf(vocab));
+
+    auto embd_inp = spm_infill ? tokens_suffix : tokens_prefix;
+    auto embd_end = spm_infill ? tokens_prefix : tokens_suffix;
+
+    if (llama_vocab_get_add_bos(vocab)) {
+        embd_inp.insert(embd_inp.begin(), llama_vocab_bos(vocab));
+    }
+
+    SRV_DBG("extra: n_ctx = %d, n_extra_take = %d, n_extra = %d\n", n_ctx, n_extra_take, (int) extra_tokens.size());
+
+    // put the extra context before the FIM prefix
+    embd_inp.insert(embd_inp.begin(), extra_tokens.end() - n_extra_take, extra_tokens.end());
+
+    embd_inp.insert(embd_inp.end(), embd_end.begin(), embd_end.end());
+    embd_inp.push_back(llama_vocab_fim_mid(vocab));
+
+    return embd_inp;
+}
+
+//
+// base64 utils (TODO: move to common in the future)
+//
+
+static const std::string base64_chars =
+             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+             "abcdefghijklmnopqrstuvwxyz"
+             "0123456789+/";
+
+static inline bool is_base64(uint8_t c) {
+    return (isalnum(c) || (c == '+') || (c == '/'));
+}
+
+static inline std::vector<uint8_t> base64_decode(const std::string & encoded_string) {
+    int i = 0;
+    int j = 0;
+    int in_ = 0;
+
+    int in_len = encoded_string.size();
+
+    uint8_t char_array_4[4];
+    uint8_t char_array_3[3];
+
+    std::vector<uint8_t> ret;
+
+    while (in_len-- && (encoded_string[in_] != '=') && is_base64(encoded_string[in_])) {
+        char_array_4[i++] = encoded_string[in_]; in_++;
+        if (i == 4) {
+            for (i = 0; i < 4; i++) {
+                char_array_4[i] = base64_chars.find(char_array_4[i]);
+            }
+
+            char_array_3[0] = ((char_array_4[0]      ) << 2) + ((char_array_4[1] & 0x30) >> 4);
+            char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
+            char_array_3[2] = ((char_array_4[2] & 0x3) << 6) +   char_array_4[3];
+
+            for (i = 0; (i < 3); i++) {
+                ret.push_back(char_array_3[i]);
+            }
+
+            i = 0;
+        }
+    }
+
+    if (i) {
+        for (j = i; j < 4; j++) {
+            char_array_4[j] = 0;
+        }
+
+        for (j = 0; j < 4; j++) {
+            char_array_4[j] = base64_chars.find(char_array_4[j]);
+        }
+
+        char_array_3[0] = ((char_array_4[0]      ) << 2) + ((char_array_4[1] & 0x30) >> 4);
+        char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
+        char_array_3[2] = ((char_array_4[2] & 0x3) << 6) +   char_array_4[3];
+
+        for (j = 0; j < i - 1; j++) {
+            ret.push_back(char_array_3[j]);
+        }
+    }
+
+    return ret;
+}
+
+//
+// random string / id
+//
+
+static std::string random_string() {
+    static const std::string str("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
+
+    std::random_device rd;
+    std::mt19937 generator(rd());
+
+    std::string result(32, ' ');
+
+    for (int i = 0; i < 32; ++i) {
+        result[i] = str[generator() % str.size()];
+    }
+
+    return result;
+}
+
+static std::string gen_chatcmplid() {
+    return "chatcmpl-" + random_string();
+}
+
+static std::string gen_tool_call_id() {
+    return random_string();
+}
+
+//
+// other common utils
+//
+
+static bool ends_with(const std::string & str, const std::string & suffix) {
+    return str.size() >= suffix.size() && 0 == str.compare(str.size() - suffix.size(), suffix.size(), suffix);
+}
+
+static size_t find_partial_stop_string(const std::string &stop, const std::string &text) {
+    if (!text.empty() && !stop.empty()) {
+        const char text_last_char = text.back();
+        for (int64_t char_index = stop.size() - 1; char_index >= 0; char_index--) {
+            if (stop[char_index] == text_last_char) {
+                const std::string current_partial = stop.substr(0, char_index + 1);
+                if (ends_with(text, current_partial)) {
+                    return text.size() - char_index - 1;
+                }
+            }
+        }
+    }
+
+    return std::string::npos;
+}
+
+// TODO: reuse llama_detokenize
+template <class Iter>
+static std::string tokens_to_str(llama_context * ctx, Iter begin, Iter end) {
+    std::string ret;
+    for (; begin != end; ++begin) {
+        ret += common_token_to_piece(ctx, *begin);
+    }
+
+    return ret;
+}
+
+// format incomplete utf-8 multibyte character for output
+static std::string tokens_to_output_formatted_string(const llama_context * ctx, const llama_token token) {
+    std::string out = token == LLAMA_TOKEN_NULL ? "" : common_token_to_piece(ctx, token);
+
+    // if the size is 1 and first bit is 1, meaning it's a partial character
+    //   (size > 1 meaning it's already a known token)
+    if (out.size() == 1 && (out[0] & 0x80) == 0x80) {
+        std::stringstream ss;
+        ss << std::hex << (out[0] & 0xff);
+        std::string res(ss.str());
+        out = "byte: \\x" + res;
+    }
+
+    return out;
+}
+
+static bool server_sent_event(httplib::DataSink & sink, const char * event, const json & data) {
+    const std::string str =
+        std::string(event) + ": " +
+        data.dump(-1, ' ', false, json::error_handler_t::replace) +
+        "\n\n"; // required by RFC 8895 - A message is terminated by a blank line (two line terminators in a row).
+
+    LOG_DBG("data stream, to_send: %s", str.c_str());
+
+    return sink.write(str.c_str(), str.size());
+}
+
+//
+// OAI utils
+//
+
+static json oaicompat_completion_params_parse(const json & body) {
+    json llama_params;
+
+    if (!body.contains("prompt")) {
+        throw std::runtime_error("\"prompt\" is required");
+    }
+
+    // Handle "stop" field
+    if (body.contains("stop") && body.at("stop").is_string()) {
+        llama_params["stop"] = json::array({body.at("stop").get<std::string>()});
+    } else {
+        llama_params["stop"] = json_value(body, "stop", json::array());
+    }
+
+    // Handle "n" field
+    int n_choices = json_value(body, "n", 1);
+    if (n_choices != 1) {
+        throw std::runtime_error("Only one completion choice is allowed");
+    }
+
+    // Handle "echo" field
+    if (json_value(body, "echo", false)) {
+        throw std::runtime_error("Only no echo is supported");
+    }
+
+    // Params supported by OAI but unsupported by llama.cpp
+    static const std::vector<std::string> unsupported_params { "best_of", "suffix" };
+    for (const auto & param : unsupported_params) {
+        if (body.contains(param)) {
+            throw std::runtime_error("Unsupported param: " + param);
+        }
+    }
+
+    // Copy remaining properties to llama_params
+    for (const auto & item : body.items()) {
+        // Exception: if "n_predict" is present, we overwrite the value specified earlier by "max_tokens"
+        if (!llama_params.contains(item.key()) || item.key() == "n_predict") {
+            llama_params[item.key()] = item.value();
+        }
+    }
+
+    return llama_params;
+}
+
+static json oaicompat_completion_params_parse(
+    const json & body, /* openai api json semantics */
+    bool use_jinja,
+    common_reasoning_format reasoning_format,
+    const struct common_chat_templates * tmpls)
+{
+    json llama_params;
+
+    auto tools = json_value(body, "tools", json());
+    auto stream = json_value(body, "stream", false);
+
+    if (tools.is_array() && !tools.empty()) {
+        if (stream) {
+            throw std::runtime_error("Cannot use tools with stream");
+        }
+        if (!use_jinja) {
+            throw std::runtime_error("tools param requires --jinja flag");
+        }
+    }
+    if (!use_jinja) {
+        if (body.contains("tool_choice") && !body.at("tool_choice").is_null()) {
+            throw std::runtime_error("Unsupported param: tool_choice");
+        }
+    }
+
+    // Handle "stop" field
+    if (body.contains("stop") && body.at("stop").is_string()) {
+        llama_params["stop"] = json::array({body.at("stop").get<std::string>()});
+    } else {
+        llama_params["stop"] = json_value(body, "stop", json::array());
+    }
+
+    auto json_schema = json_value(body, "json_schema", json());
+    auto grammar = json_value(body, "grammar", std::string());
+    if (!json_schema.is_null() && !grammar.empty()) {
+        throw std::runtime_error("Cannot use both json_schema and grammar");
+    }
+
+    // Handle "response_format" field
+    if (body.contains("response_format")) {
+        json response_format      = json_value(body, "response_format", json::object());
+        std::string response_type = json_value(response_format, "type", std::string());
+        if (response_type == "json_object") {
+            json_schema = json_value(response_format, "schema", json::object());
+        } else if (response_type == "json_schema") {
+            auto schema_wrapper = json_value(response_format, "json_schema", json::object());
+            json_schema = json_value(schema_wrapper, "schema", json::object());
+        } else if (!response_type.empty() && response_type != "text") {
+            throw std::runtime_error("response_format type must be one of \"text\" or \"json_object\", but got: " + response_type);
+        }
+    }
+
+    common_chat_templates_inputs inputs;
+    inputs.messages              = common_chat_msgs_parse_oaicompat(body.at("messages"));
+    inputs.tools                 = common_chat_tools_parse_oaicompat(tools);
+    inputs.tool_choice           = common_chat_tool_choice_parse_oaicompat(json_value(body, "tool_choice", std::string("auto")));
+    inputs.json_schema           = json_schema.is_null() ? "" : json_schema.dump();
+    inputs.grammar               = grammar;
+    inputs.add_generation_prompt = json_value(body, "add_generation_prompt", true);
+    inputs.use_jinja             = use_jinja;
+    inputs.parallel_tool_calls   = json_value(body, "parallel_tool_calls", false);
+    inputs.extract_reasoning     = reasoning_format != COMMON_REASONING_FORMAT_NONE;
+    inputs.add_generation_prompt = json_value(body, "add_generation_prompt", true);
+    if (!inputs.tools.empty() && inputs.tool_choice != COMMON_CHAT_TOOL_CHOICE_NONE && body.contains("grammar")) {
+        throw std::runtime_error("Cannot use custom grammar constraints with tools.");
+    }
+
+    // if the assistant message appears at the end of list, we do not add end-of-turn token
+    // for ex. this can be useful to modify the reasoning process in reasoning models
+    bool prefill_assistant_message = !inputs.messages.empty() && inputs.messages.back().role == "assistant";
+    common_chat_msg last_message;
+    if (prefill_assistant_message) {
+        last_message = inputs.messages.back();
+        inputs.messages.pop_back();
+
+        /* sanity check, max one assistant message at the end of the list */
+        if (!inputs.messages.empty() && inputs.messages.back().role == "assistant"){
+            throw std::runtime_error("Cannot have 2 or more assistant messages at the end of the list.");
+        }
+
+        inputs.extract_reasoning = false;
+        inputs.add_generation_prompt = true;
+    }
+
+    // Apply chat template to the list of messages
+    auto chat_params = common_chat_templates_apply(tmpls, inputs);
+
+    /* Append assistant prefilled message */
+    if (prefill_assistant_message) {
+         chat_params.prompt += last_message.content;
+    }
+
+    llama_params["chat_format"]      = static_cast<int>(chat_params.format);
+    llama_params["prompt"]           = chat_params.prompt;
+    if (!chat_params.grammar.empty()) {
+        llama_params["grammar"] = chat_params.grammar;
+    }
+    llama_params["grammar_lazy"]     = chat_params.grammar_lazy;
+    auto grammar_triggers = json::array();
+    for (const auto & trigger : chat_params.grammar_triggers) {
+        server_grammar_trigger ct(trigger);
+        grammar_triggers.push_back(ct.to_json());
+    }
+    llama_params["grammar_triggers"] = grammar_triggers;
+    llama_params["preserved_tokens"] = chat_params.preserved_tokens;
+    for (const auto & stop : chat_params.additional_stops) {
+        llama_params["stop"].push_back(stop);
+    }
+
+    // Handle "n" field
+    int n_choices = json_value(body, "n", 1);
+    if (n_choices != 1) {
+        throw std::runtime_error("Only one completion choice is allowed");
+    }
+
+    // Handle "logprobs" field
+    // TODO: The response format of this option is not yet OAI-compatible, but seems like no one really using it; We may need to fix it in the future
+    if (json_value(body, "logprobs", false)) {
+        llama_params["n_probs"] = json_value(body, "top_logprobs", 20);
+    } else if (body.contains("top_logprobs") && !body.at("top_logprobs").is_null()) {
+        throw std::runtime_error("top_logprobs requires logprobs to be set to true");
+    }
+
+    // Copy remaining properties to llama_params
+    // This allows user to use llama.cpp-specific params like "mirostat", ... via OAI endpoint.
+    // See "launch_slot_with_task()" for a complete list of params supported by llama.cpp
+    for (const auto & item : body.items()) {
+        // Exception: if "n_predict" is present, we overwrite the value specified earlier by "max_tokens"
+        if (!llama_params.contains(item.key()) || item.key() == "n_predict") {
+            llama_params[item.key()] = item.value();
+        }
+    }
+
+    return llama_params;
+}
+
+static json format_embeddings_response_oaicompat(const json & request, const json & embeddings, bool use_base64 = false) {
+    json data = json::array();
+    int32_t n_tokens = 0;
+    int i = 0;
+    for (const auto & elem : embeddings) {
+        json embedding_obj;
+
+        if (use_base64) {
+            const auto& vec = json_value(elem, "embedding", json::array()).get<std::vector<float>>();
+            const char* data_ptr = reinterpret_cast<const char*>(vec.data());
+            size_t data_size = vec.size() * sizeof(float);
+            embedding_obj = {
+                {"embedding", base64::encode(data_ptr, data_size)},
+                {"index", i++},
+                {"object", "embedding"},
+                {"encoding_format", "base64"}
+            };
+        } else {
+            embedding_obj = {
+                {"embedding", json_value(elem, "embedding", json::array())},
+                {"index", i++},
+                {"object", "embedding"}
+            };
+        }
+        data.push_back(embedding_obj);
+
+        n_tokens += json_value(elem, "tokens_evaluated", 0);
+    }
+
+    json res = json {
+        {"model", json_value(request, "model", std::string(DEFAULT_OAICOMPAT_MODEL))},
+        {"object", "list"},
+        {"usage", json {
+            {"prompt_tokens", n_tokens},
+            {"total_tokens", n_tokens}
+        }},
+        {"data", data}
+    };
+
+    return res;
+}
+
+static json format_response_rerank(
+        const json & request,
+        const json & ranks,
+        bool is_tei_format,
+        std::vector<std::string> & texts) {
+    json res;
+    if (is_tei_format) {
+        // TEI response format
+        res = json::array();
+        bool return_text = json_value(request, "return_text", false);
+        for (const auto & rank : ranks) {
+            int index = json_value(rank, "index", 0);
+            json elem = json{
+                {"index", index},
+                {"score", json_value(rank, "score", 0.0)},
+            };
+            if (return_text) {
+                elem["text"] = std::move(texts[index]);
+            }
+            res.push_back(elem);
+        }
+    } else {
+        // Jina response format
+        json results = json::array();
+        int32_t n_tokens = 0;
+        for (const auto & rank : ranks) {
+            results.push_back(json{
+                {"index",           json_value(rank, "index", 0)},
+                {"relevance_score", json_value(rank, "score", 0.0)},
+            });
+
+            n_tokens += json_value(rank, "tokens_evaluated", 0);
+        }
+
+        res = json{
+            {"model", json_value(request, "model", std::string(DEFAULT_OAICOMPAT_MODEL))},
+            {"object", "list"},
+            {"usage", json{
+                {"prompt_tokens", n_tokens},
+                {"total_tokens", n_tokens}
+            }},
+            {"results", results}
+        };
+    }
+
+    return res;
+}
+
+static bool is_valid_utf8(const std::string & str) {
+    const unsigned char* bytes = reinterpret_cast<const unsigned char*>(str.data());
+    const unsigned char* end = bytes + str.length();
+
+    while (bytes < end) {
+        if (*bytes <= 0x7F) {
+            // 1-byte sequence (0xxxxxxx)
+            bytes++;
+        } else if ((*bytes & 0xE0) == 0xC0) {
+            // 2-byte sequence (110xxxxx 10xxxxxx)
+            if (end - bytes < 2 || (bytes[1] & 0xC0) != 0x80)
+                return false;
+            bytes += 2;
+        } else if ((*bytes & 0xF0) == 0xE0) {
+            // 3-byte sequence (1110xxxx 10xxxxxx 10xxxxxx)
+            if (end - bytes < 3 || (bytes[1] & 0xC0) != 0x80 || (bytes[2] & 0xC0) != 0x80)
+                return false;
+            bytes += 3;
+        } else if ((*bytes & 0xF8) == 0xF0) {
+            // 4-byte sequence (11110xxx 10xxxxxx 10xxxxxx 10xxxxxx)
+            if (end - bytes < 4 || (bytes[1] & 0xC0) != 0x80 ||
+                (bytes[2] & 0xC0) != 0x80 || (bytes[3] & 0xC0) != 0x80)
+                return false;
+            bytes += 4;
+        } else {
+            // Invalid UTF-8 lead byte
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static json format_tokenizer_response(const json & tokens) {
+    return json {
+        {"tokens", tokens}
+    };
+}
+
+static json format_detokenized_response(const std::string & content) {
+    return json {
+        {"content", content}
+    };
+}
+
+static json format_logit_bias(const std::vector<llama_logit_bias> & logit_bias) {
+    json data = json::array();
+    for (const auto & lb : logit_bias) {
+        data.push_back(json{
+            {"bias", lb.bias},
+            {"token", lb.token},
+        });
+    }
+    return data;
+}
+
+static std::string safe_json_to_str(const json & data) {
+    return data.dump(-1, ' ', false, json::error_handler_t::replace);
+}
+
+static std::vector<llama_token_data> get_token_probabilities(llama_context * ctx, int idx) {
+    std::vector<llama_token_data> cur;
+    const auto * logits = llama_get_logits_ith(ctx, idx);
+
+    const llama_model * model = llama_get_model(ctx);
+    const llama_vocab * vocab = llama_model_get_vocab(model);
+
+    const int n_vocab = llama_vocab_n_tokens(vocab);
+
+    cur.resize(n_vocab);
+    for (llama_token token_id = 0; token_id < n_vocab; token_id++) {
+        cur[token_id] = llama_token_data{token_id, logits[token_id], 0.0f};
+    }
+
+    // sort tokens by logits
+    std::sort(cur.begin(), cur.end(), [](const llama_token_data & a, const llama_token_data & b) {
+        return a.logit > b.logit;
+    });
+
+    // apply softmax
+    float max_l = cur[0].logit;
+    float cum_sum = 0.0f;
+    for (size_t i = 0; i < cur.size(); ++i) {
+        float p = expf(cur[i].logit - max_l);
+        cur[i].p = p;
+        cum_sum += p;
+    }
+    for (size_t i = 0; i < cur.size(); ++i) {
+        cur[i].p /= cum_sum;
+    }
+
+    return cur;
+}
+
+static bool are_lora_equal(
+        const std::vector<common_adapter_lora_info> & l1,
+        const std::vector<common_adapter_lora_info> & l2) {
+    if (l1.size() != l2.size()) {
+        return false;
+    }
+    for (size_t i = 0; i < l1.size(); ++i) {
+        // we don't check lora.path to reduce the time complexity
+        if (l1[i].scale != l2[i].scale || l1[i].ptr != l2[i].ptr) {
+            return false;
+        }
+    }
+    return true;
+}
+
+// parse lora config from JSON request, returned a copy of lora_base with updated scale
+static std::vector<common_adapter_lora_info> parse_lora_request(
+        const std::vector<common_adapter_lora_info> & lora_base,
+        const json & data) {
+    std::vector<common_adapter_lora_info> lora(lora_base);
+    int max_idx = lora.size();
+
+    // clear existing value
+    for (auto & entry : lora) {
+        entry.scale = 0.0f;
+    }
+
+    // set value
+    for (const auto & entry : data) {
+        int id      = json_value(entry, "id", -1);
+        float scale = json_value(entry, "scale", 0.0f);
+        if (0 <= id && id < max_idx) {
+            lora[id].scale = scale;
+        } else {
+            throw std::runtime_error("invalid adapter id");
+        }
+    }
+
+    return lora;
+}

tools/server/webui/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

tools/server/webui/.prettierignore

@@ -0,0 +1,10 @@
+**/.vscode
+**/.github
+**/.git
+**/.svn
+**/.hg
+**/node_modules
+**/dist
+**/build
+
+*.config.js

tools/server/webui/eslint.config.js

@@ -0,0 +1,26 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  { ignores: ['dist'] },
+  {
+    extends: [js.configs.recommended, ...tseslint.configs.recommended],
+    files: ['**/*.{ts,tsx}'],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+    plugins: {
+      'react-hooks': reactHooks,
+      'react-refresh': reactRefresh,
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules,
+      'react-refresh/only-export-components': 'off',
+      '@typescript-eslint/no-unused-vars': 'off',
+    },
+  },
+)

tools/server/webui/index.html

@@ -0,0 +1,16 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1, maximum-scale=1"
+    />
+    <meta name="color-scheme" content="light dark" />
+    <title>🦙 llama.cpp - chat</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

tools/server/webui/package.json

@@ -0,0 +1,62 @@
+{
+  "name": "webui",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "format": "eslint . && prettier --write .",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@heroicons/react": "^2.2.0",
+    "@sec-ant/readable-stream": "^0.6.0",
+    "@tailwindcss/postcss": "^4.1.1",
+    "@tailwindcss/vite": "^4.1.1",
+    "@vscode/markdown-it-katex": "^1.1.1",
+    "autoprefixer": "^10.4.20",
+    "daisyui": "^5.0.12",
+    "dexie": "^4.0.11",
+    "highlight.js": "^11.10.0",
+    "katex": "^0.16.15",
+    "postcss": "^8.4.49",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-markdown": "^9.0.3",
+    "react-router": "^7.1.5",
+    "rehype-highlight": "^7.0.2",
+    "rehype-katex": "^7.0.1",
+    "remark-breaks": "^4.0.0",
+    "remark-gfm": "^4.0.0",
+    "remark-math": "^6.0.0",
+    "tailwindcss": "^4.1.1",
+    "textlinestream": "^1.1.1",
+    "vite-plugin-singlefile": "^2.0.3"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.17.0",
+    "@types/markdown-it": "^14.1.2",
+    "@types/node": "^22.13.1",
+    "@types/react": "^18.3.18",
+    "@types/react-dom": "^18.3.5",
+    "@vitejs/plugin-react": "^4.3.4",
+    "eslint": "^9.17.0",
+    "eslint-plugin-react-hooks": "^5.0.0",
+    "eslint-plugin-react-refresh": "^0.4.16",
+    "globals": "^15.14.0",
+    "prettier": "^3.4.2",
+    "sass-embedded": "^1.83.4",
+    "typescript": "~5.6.2",
+    "typescript-eslint": "^8.18.2",
+    "vite": "^6.0.5"
+  },
+  "prettier": {
+    "trailingComma": "es5",
+    "tabWidth": 2,
+    "semi": true,
+    "singleQuote": true,
+    "bracketSameLine": false
+  }
+}

tools/server/webui/postcss.config.js

@@ -0,0 +1,5 @@
+export default {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+}

tools/server/webui/public/demo-conversation.json

@@ -0,0 +1,33 @@
+{
+  "demo": true,
+  "id": "conv-1734086746930",
+  "lastModified": 1734087548943,
+  "messages": [
+    {
+      "id": 1734086764521,
+      "role": "user",
+      "content": "this is a demo conversation, used in dev mode"
+    },
+    {
+      "id": 1734087548327,
+      "role": "assistant",
+      "content": "This is the formula:\n\n$\\frac{e^{x_i}}{\\sum_{j=1}^{n}e^{x_j}}$\n\nGiven an input vector \\(\\mathbf{x} = [x_1, x_2, \\ldots, x_n]\\)\n\n\\[\ny_i = \\frac{e^{x_i}}{\\sum_{j=1}^n e^{x_j}}\n\\]\n\n$2x + y = z$\n\nCode block latex:\n```latex\n\\frac{e^{x_i}}{\\sum_{j=1}^{n}e^{x_j}}\n```\n\nTest dollar sign: $1234 $4567\n\nInvalid latex syntax: $E = mc^$ and $$E = mc^$$",
+      "timings": {
+        "prompt_n": 1,
+        "prompt_ms": 28.923,
+        "predicted_n": 25,
+        "predicted_ms": 573.016
+      }
+    },
+    {
+      "id": 1734087548328,
+      "role": "user",
+      "content": "this is a demo conversation, used in dev mode"
+    },
+    {
+      "id": 1734087548329,
+      "role": "assistant",
+      "content": "Code block:\n```js\nconsole.log('hello world')\n```\n```sh\nls -la /dev\n```"
+    }
+  ]
+}

tools/server/webui/src/App.tsx

@@ -0,0 +1,47 @@
+import { HashRouter, Outlet, Route, Routes } from 'react-router';
+import Header from './components/Header';
+import Sidebar from './components/Sidebar';
+import { AppContextProvider, useAppContext } from './utils/app.context';
+import ChatScreen from './components/ChatScreen';
+import SettingDialog from './components/SettingDialog';
+
+function App() {
+  return (
+    <HashRouter>
+      <div className="flex flex-row drawer lg:drawer-open">
+        <AppContextProvider>
+          <Routes>
+            <Route element={<AppLayout />}>
+              <Route path="/chat/:convId" element={<ChatScreen />} />
+              <Route path="*" element={<ChatScreen />} />
+            </Route>
+          </Routes>
+        </AppContextProvider>
+      </div>
+    </HashRouter>
+  );
+}
+
+function AppLayout() {
+  const { showSettings, setShowSettings } = useAppContext();
+  return (
+    <>
+      <Sidebar />
+      <div
+        className="drawer-content grow flex flex-col h-screen w-screen mx-auto px-4 overflow-auto bg-base-100"
+        id="main-scroll"
+      >
+        <Header />
+        <Outlet />
+      </div>
+      {
+        <SettingDialog
+          show={showSettings}
+          onClose={() => setShowSettings(false)}
+        />
+      }
+    </>
+  );
+}
+
+export default App;

tools/server/webui/src/Config.ts

@@ -0,0 +1,92 @@
+import daisyuiThemes from 'daisyui/theme/object';
+import { isNumeric } from './utils/misc';
+
+export const isDev = import.meta.env.MODE === 'development';
+
+// constants
+export const BASE_URL = new URL('.', document.baseURI).href
+  .toString()
+  .replace(/\/$/, '');
+
+export const CONFIG_DEFAULT = {
+  // Note: in order not to introduce breaking changes, please keep the same data type (number, string, etc) if you want to change the default value. Do not use null or undefined for default value.
+  // Do not use nested objects, keep it single level. Prefix the key if you need to group them.
+  apiKey: '',
+  systemMessage: 'You are a helpful assistant.',
+  showTokensPerSecond: false,
+  showThoughtInProgress: false,
+  excludeThoughtOnReq: true,
+  // make sure these default values are in sync with `common.h`
+  samplers: 'edkypmxt',
+  temperature: 0.8,
+  dynatemp_range: 0.0,
+  dynatemp_exponent: 1.0,
+  top_k: 40,
+  top_p: 0.95,
+  min_p: 0.05,
+  xtc_probability: 0.0,
+  xtc_threshold: 0.1,
+  typical_p: 1.0,
+  repeat_last_n: 64,
+  repeat_penalty: 1.0,
+  presence_penalty: 0.0,
+  frequency_penalty: 0.0,
+  dry_multiplier: 0.0,
+  dry_base: 1.75,
+  dry_allowed_length: 2,
+  dry_penalty_last_n: -1,
+  max_tokens: -1,
+  custom: '', // custom json-stringified object
+  // experimental features
+  pyIntepreterEnabled: false,
+};
+export const CONFIG_INFO: Record<string, string> = {
+  apiKey: 'Set the API Key if you are using --api-key option for the server.',
+  systemMessage: 'The starting message that defines how model should behave.',
+  samplers:
+    'The order at which samplers are applied, in simplified way. Default is "dkypmxt": dry->top_k->typ_p->top_p->min_p->xtc->temperature',
+  temperature:
+    'Controls the randomness of the generated text by affecting the probability distribution of the output tokens. Higher = more random, lower = more focused.',
+  dynatemp_range:
+    'Addon for the temperature sampler. The added value to the range of dynamic temperature, which adjusts probabilities by entropy of tokens.',
+  dynatemp_exponent:
+    'Addon for the temperature sampler. Smoothes out the probability redistribution based on the most probable token.',
+  top_k: 'Keeps only k top tokens.',
+  top_p:
+    'Limits tokens to those that together have a cumulative probability of at least p',
+  min_p:
+    'Limits tokens based on the minimum probability for a token to be considered, relative to the probability of the most likely token.',
+  xtc_probability:
+    'XTC sampler cuts out top tokens; this parameter controls the chance of cutting tokens at all. 0 disables XTC.',
+  xtc_threshold:
+    'XTC sampler cuts out top tokens; this parameter controls the token probability that is required to cut that token.',
+  typical_p:
+    'Sorts and limits tokens based on the difference between log-probability and entropy.',
+  repeat_last_n: 'Last n tokens to consider for penalizing repetition',
+  repeat_penalty:
+    'Controls the repetition of token sequences in the generated text',
+  presence_penalty:
+    'Limits tokens based on whether they appear in the output or not.',
+  frequency_penalty:
+    'Limits tokens based on how often they appear in the output.',
+  dry_multiplier:
+    'DRY sampling reduces repetition in generated text even across long contexts. This parameter sets the DRY sampling multiplier.',
+  dry_base:
+    'DRY sampling reduces repetition in generated text even across long contexts. This parameter sets the DRY sampling base value.',
+  dry_allowed_length:
+    'DRY sampling reduces repetition in generated text even across long contexts. This parameter sets the allowed length for DRY sampling.',
+  dry_penalty_last_n:
+    'DRY sampling reduces repetition in generated text even across long contexts. This parameter sets DRY penalty for the last n tokens.',
+  max_tokens: 'The maximum number of token per output.',
+  custom: '', // custom json-stringified object
+};
+// config keys having numeric value (i.e. temperature, top_k, top_p, etc)
+export const CONFIG_NUMERIC_KEYS = Object.entries(CONFIG_DEFAULT)
+  .filter((e) => isNumeric(e[1]))
+  .map((e) => e[0]);
+// list of themes supported by daisyui
+export const THEMES = ['light', 'dark']
+  // make sure light & dark are always at the beginning
+  .concat(
+    Object.keys(daisyuiThemes).filter((t) => t !== 'light' && t !== 'dark')
+  );

tools/server/webui/src/components/CanvasPyInterpreter.tsx

@@ -0,0 +1,195 @@
+import { useEffect, useState } from 'react';
+import { useAppContext } from '../utils/app.context';
+import { OpenInNewTab, XCloseButton } from '../utils/common';
+import { CanvasType } from '../utils/types';
+import { PlayIcon, StopIcon } from '@heroicons/react/24/outline';
+import StorageUtils from '../utils/storage';
+
+const canInterrupt = typeof SharedArrayBuffer === 'function';
+
+// adapted from https://pyodide.org/en/stable/usage/webworker.html
+const WORKER_CODE = `
+importScripts("https://cdn.jsdelivr.net/pyodide/v0.27.2/full/pyodide.js");
+
+let stdOutAndErr = [];
+
+let pyodideReadyPromise = loadPyodide({
+  stdout: (data) => stdOutAndErr.push(data),
+  stderr: (data) => stdOutAndErr.push(data),
+});
+
+let alreadySetBuff = false;
+
+self.onmessage = async (event) => {
+  stdOutAndErr = [];
+
+  // make sure loading is done
+  const pyodide = await pyodideReadyPromise;
+  const { id, python, context, interruptBuffer } = event.data;
+
+  if (interruptBuffer && !alreadySetBuff) {
+    pyodide.setInterruptBuffer(interruptBuffer);
+    alreadySetBuff = true;
+  }
+
+  // Now load any packages we need, run the code, and send the result back.
+  await pyodide.loadPackagesFromImports(python);
+
+  // make a Python dictionary with the data from content
+  const dict = pyodide.globals.get("dict");
+  const globals = dict(Object.entries(context));
+  try {
+    self.postMessage({ id, running: true });
+    // Execute the python code in this context
+    const result = pyodide.runPython(python, { globals });
+    self.postMessage({ result, id, stdOutAndErr });
+  } catch (error) {
+    self.postMessage({ error: error.message, id });
+  }
+  interruptBuffer[0] = 0;
+};
+`;
+
+let worker: Worker;
+const interruptBuffer = canInterrupt
+  ? new Uint8Array(new SharedArrayBuffer(1))
+  : null;
+
+const startWorker = () => {
+  if (!worker) {
+    worker = new Worker(
+      URL.createObjectURL(new Blob([WORKER_CODE], { type: 'text/javascript' }))
+    );
+  }
+};
+
+if (StorageUtils.getConfig().pyIntepreterEnabled) {
+  startWorker();
+}
+
+const runCodeInWorker = (
+  pyCode: string,
+  callbackRunning: () => void
+): {
+  donePromise: Promise<string>;
+  interrupt: () => void;
+} => {
+  startWorker();
+  const id = Math.random() * 1e8;
+  const context = {};
+  if (interruptBuffer) {
+    interruptBuffer[0] = 0;
+  }
+
+  const donePromise = new Promise<string>((resolve) => {
+    worker.onmessage = (event) => {
+      const { error, stdOutAndErr, running } = event.data;
+      if (id !== event.data.id) return;
+      if (running) {
+        callbackRunning();
+        return;
+      } else if (error) {
+        resolve(error.toString());
+      } else {
+        resolve(stdOutAndErr.join('\n'));
+      }
+    };
+    worker.postMessage({ id, python: pyCode, context, interruptBuffer });
+  });
+
+  const interrupt = () => {
+    console.log('Interrupting...');
+    console.trace();
+    if (interruptBuffer) {
+      interruptBuffer[0] = 2;
+    }
+  };
+
+  return { donePromise, interrupt };
+};
+
+export default function CanvasPyInterpreter() {
+  const { canvasData, setCanvasData } = useAppContext();
+
+  const [code, setCode] = useState(canvasData?.content ?? ''); // copy to avoid direct mutation
+  const [running, setRunning] = useState(false);
+  const [output, setOutput] = useState('');
+  const [interruptFn, setInterruptFn] = useState<() => void>();
+  const [showStopBtn, setShowStopBtn] = useState(false);
+
+  const runCode = async (pycode: string) => {
+    interruptFn?.();
+    setRunning(true);
+    setOutput('Loading Pyodide...');
+    const { donePromise, interrupt } = runCodeInWorker(pycode, () => {
+      setOutput('Running...');
+      setShowStopBtn(canInterrupt);
+    });
+    setInterruptFn(() => interrupt);
+    const out = await donePromise;
+    setOutput(out);
+    setRunning(false);
+    setShowStopBtn(false);
+  };
+
+  // run code on mount
+  useEffect(() => {
+    setCode(canvasData?.content ?? '');
+    runCode(canvasData?.content ?? '');
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [canvasData?.content]);
+
+  if (canvasData?.type !== CanvasType.PY_INTERPRETER) {
+    return null;
+  }
+
+  return (
+    <div className="card bg-base-200 w-full h-full shadow-xl">
+      <div className="card-body">
+        <div className="flex justify-between items-center mb-4">
+          <span className="text-lg font-bold">Python Interpreter</span>
+          <XCloseButton
+            className="bg-base-100"
+            onClick={() => setCanvasData(null)}
+          />
+        </div>
+        <div className="grid grid-rows-3 gap-4 h-full">
+          <textarea
+            className="textarea textarea-bordered w-full h-full font-mono"
+            value={code}
+            onChange={(e) => setCode(e.target.value)}
+          ></textarea>
+          <div className="font-mono flex flex-col row-span-2">
+            <div className="flex items-center mb-2">
+              <button
+                className="btn btn-sm bg-base-100"
+                onClick={() => runCode(code)}
+                disabled={running}
+              >
+                <PlayIcon className="h-6 w-6" /> Run
+              </button>
+              {showStopBtn && (
+                <button
+                  className="btn btn-sm bg-base-100 ml-2"
+                  onClick={() => interruptFn?.()}
+                >
+                  <StopIcon className="h-6 w-6" /> Stop
+                </button>
+              )}
+              <span className="grow text-right text-xs">
+                <OpenInNewTab href="https://github.com/ggerganov/llama.cpp/issues/11762">
+                  Report a bug
+                </OpenInNewTab>
+              </span>
+            </div>
+            <textarea
+              className="textarea textarea-bordered h-full dark-color"
+              value={output}
+              readOnly
+            ></textarea>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

tools/server/webui/src/components/ChatMessage.tsx

@@ -0,0 +1,296 @@
+import { useMemo, useState } from 'react';
+import { useAppContext } from '../utils/app.context';
+import { Message, PendingMessage } from '../utils/types';
+import { classNames } from '../utils/misc';
+import MarkdownDisplay, { CopyButton } from './MarkdownDisplay';
+import { ChevronLeftIcon, ChevronRightIcon } from '@heroicons/react/24/outline';
+
+interface SplitMessage {
+  content: PendingMessage['content'];
+  thought?: string;
+  isThinking?: boolean;
+}
+
+export default function ChatMessage({
+  msg,
+  siblingLeafNodeIds,
+  siblingCurrIdx,
+  id,
+  onRegenerateMessage,
+  onEditMessage,
+  onChangeSibling,
+  isPending,
+}: {
+  msg: Message | PendingMessage;
+  siblingLeafNodeIds: Message['id'][];
+  siblingCurrIdx: number;
+  id?: string;
+  onRegenerateMessage(msg: Message): void;
+  onEditMessage(msg: Message, content: string): void;
+  onChangeSibling(sibling: Message['id']): void;
+  isPending?: boolean;
+}) {
+  const { viewingChat, config } = useAppContext();
+  const [editingContent, setEditingContent] = useState<string | null>(null);
+  const timings = useMemo(
+    () =>
+      msg.timings
+        ? {
+            ...msg.timings,
+            prompt_per_second:
+              (msg.timings.prompt_n / msg.timings.prompt_ms) * 1000,
+            predicted_per_second:
+              (msg.timings.predicted_n / msg.timings.predicted_ms) * 1000,
+          }
+        : null,
+    [msg.timings]
+  );
+  const nextSibling = siblingLeafNodeIds[siblingCurrIdx + 1];
+  const prevSibling = siblingLeafNodeIds[siblingCurrIdx - 1];
+
+  // for reasoning model, we split the message into content and thought
+  // TODO: implement this as remark/rehype plugin in the future
+  const { content, thought, isThinking }: SplitMessage = useMemo(() => {
+    if (msg.content === null || msg.role !== 'assistant') {
+      return { content: msg.content };
+    }
+    let actualContent = '';
+    let thought = '';
+    let isThinking = false;
+    let thinkSplit = msg.content.split('<think>', 2);
+    actualContent += thinkSplit[0];
+    while (thinkSplit[1] !== undefined) {
+      // <think> tag found
+      thinkSplit = thinkSplit[1].split('</think>', 2);
+      thought += thinkSplit[0];
+      isThinking = true;
+      if (thinkSplit[1] !== undefined) {
+        // </think> closing tag found
+        isThinking = false;
+        thinkSplit = thinkSplit[1].split('<think>', 2);
+        actualContent += thinkSplit[0];
+      }
+    }
+    return { content: actualContent, thought, isThinking };
+  }, [msg]);
+
+  if (!viewingChat) return null;
+
+  return (
+    <div className="group" id={id}>
+      <div
+        className={classNames({
+          chat: true,
+          'chat-start': msg.role !== 'user',
+          'chat-end': msg.role === 'user',
+        })}
+      >
+        <div
+          className={classNames({
+            'chat-bubble markdown': true,
+            'chat-bubble-base-300': msg.role !== 'user',
+          })}
+        >
+          {/* textarea for editing message */}
+          {editingContent !== null && (
+            <>
+              <textarea
+                dir="auto"
+                className="textarea textarea-bordered bg-base-100 text-base-content max-w-2xl w-[calc(90vw-8em)] h-24"
+                value={editingContent}
+                onChange={(e) => setEditingContent(e.target.value)}
+              ></textarea>
+              <br />
+              <button
+                className="btn btn-ghost mt-2 mr-2"
+                onClick={() => setEditingContent(null)}
+              >
+                Cancel
+              </button>
+              <button
+                className="btn mt-2"
+                onClick={() => {
+                  if (msg.content !== null) {
+                    setEditingContent(null);
+                    onEditMessage(msg as Message, editingContent);
+                  }
+                }}
+              >
+                Submit
+              </button>
+            </>
+          )}
+          {/* not editing content, render message */}
+          {editingContent === null && (
+            <>
+              {content === null ? (
+                <>
+                  {/* show loading dots for pending message */}
+                  <span className="loading loading-dots loading-md"></span>
+                </>
+              ) : (
+                <>
+                  {/* render message as markdown */}
+                  <div dir="auto">
+                    {thought && (
+                      <details
+                        className="collapse bg-base-200 collapse-arrow mb-4"
+                        open={isThinking && config.showThoughtInProgress}
+                      >
+                        <summary className="collapse-title">
+                          {isPending && isThinking ? (
+                            <span>
+                              <span
+                                v-if="isGenerating"
+                                className="loading loading-spinner loading-md mr-2"
+                                style={{ verticalAlign: 'middle' }}
+                              ></span>
+                              <b>Thinking</b>
+                            </span>
+                          ) : (
+                            <b>Thought Process</b>
+                          )}
+                        </summary>
+                        <div className="collapse-content">
+                          <MarkdownDisplay
+                            content={thought}
+                            isGenerating={isPending}
+                          />
+                        </div>
+                      </details>
+                    )}
+
+                    {msg.extra && msg.extra.length > 0 && (
+                      <details
+                        className={classNames({
+                          'collapse collapse-arrow mb-4 bg-base-200': true,
+                          'bg-opacity-10': msg.role !== 'assistant',
+                        })}
+                      >
+                        <summary className="collapse-title">
+                          Extra content
+                        </summary>
+                        <div className="collapse-content">
+                          {msg.extra.map(
+                            (extra, i) =>
+                              extra.type === 'textFile' ? (
+                                <div key={extra.name}>
+                                  <b>{extra.name}</b>
+                                  <pre>{extra.content}</pre>
+                                </div>
+                              ) : extra.type === 'context' ? (
+                                <div key={i}>
+                                  <pre>{extra.content}</pre>
+                                </div>
+                              ) : null // TODO: support other extra types
+                          )}
+                        </div>
+                      </details>
+                    )}
+
+                    <MarkdownDisplay
+                      content={content}
+                      isGenerating={isPending}
+                    />
+                  </div>
+                </>
+              )}
+              {/* render timings if enabled */}
+              {timings && config.showTokensPerSecond && (
+                <div className="dropdown dropdown-hover dropdown-top mt-2">
+                  <div
+                    tabIndex={0}
+                    role="button"
+                    className="cursor-pointer font-semibold text-sm opacity-60"
+                  >
+                    Speed: {timings.predicted_per_second.toFixed(1)} t/s
+                  </div>
+                  <div className="dropdown-content bg-base-100 z-10 w-64 p-2 shadow mt-4">
+                    <b>Prompt</b>
+                    <br />- Tokens: {timings.prompt_n}
+                    <br />- Time: {timings.prompt_ms} ms
+                    <br />- Speed: {timings.prompt_per_second.toFixed(1)} t/s
+                    <br />
+                    <b>Generation</b>
+                    <br />- Tokens: {timings.predicted_n}
+                    <br />- Time: {timings.predicted_ms} ms
+                    <br />- Speed: {timings.predicted_per_second.toFixed(1)} t/s
+                    <br />
+                  </div>
+                </div>
+              )}
+            </>
+          )}
+        </div>
+      </div>
+
+      {/* actions for each message */}
+      {msg.content !== null && (
+        <div
+          className={classNames({
+            'flex items-center gap-2 mx-4 mt-2 mb-2': true,
+            'flex-row-reverse': msg.role === 'user',
+          })}
+        >
+          {siblingLeafNodeIds && siblingLeafNodeIds.length > 1 && (
+            <div className="flex gap-1 items-center opacity-60 text-sm">
+              <button
+                className={classNames({
+                  'btn btn-sm btn-ghost p-1': true,
+                  'opacity-20': !prevSibling,
+                })}
+                onClick={() => prevSibling && onChangeSibling(prevSibling)}
+              >
+                <ChevronLeftIcon className="h-4 w-4" />
+              </button>
+              <span>
+                {siblingCurrIdx + 1} / {siblingLeafNodeIds.length}
+              </span>
+              <button
+                className={classNames({
+                  'btn btn-sm btn-ghost p-1': true,
+                  'opacity-20': !nextSibling,
+                })}
+                onClick={() => nextSibling && onChangeSibling(nextSibling)}
+              >
+                <ChevronRightIcon className="h-4 w-4" />
+              </button>
+            </div>
+          )}
+          {/* user message */}
+          {msg.role === 'user' && (
+            <button
+              className="badge btn-mini show-on-hover"
+              onClick={() => setEditingContent(msg.content)}
+              disabled={msg.content === null}
+            >
+              ✍️ Edit
+            </button>
+          )}
+          {/* assistant message */}
+          {msg.role === 'assistant' && (
+            <>
+              {!isPending && (
+                <button
+                  className="badge btn-mini show-on-hover mr-2"
+                  onClick={() => {
+                    if (msg.content !== null) {
+                      onRegenerateMessage(msg as Message);
+                    }
+                  }}
+                  disabled={msg.content === null}
+                >
+                  🔄 Regenerate
+                </button>
+              )}
+            </>
+          )}
+          <CopyButton
+            className="badge btn-mini show-on-hover mr-2"
+            content={msg.content}
+          />
+        </div>
+      )}
+    </div>
+  );
+}

tools/server/webui/src/components/ChatScreen.tsx

@@ -0,0 +1,296 @@
+import { useEffect, useMemo, useState } from 'react';
+import { CallbackGeneratedChunk, useAppContext } from '../utils/app.context';
+import ChatMessage from './ChatMessage';
+import { CanvasType, Message, PendingMessage } from '../utils/types';
+import { classNames, cleanCurrentUrl, throttle } from '../utils/misc';
+import CanvasPyInterpreter from './CanvasPyInterpreter';
+import StorageUtils from '../utils/storage';
+import { useVSCodeContext } from '../utils/llama-vscode';
+import { useChatTextarea, ChatTextareaApi } from './useChatTextarea.ts';
+
+/**
+ * A message display is a message node with additional information for rendering.
+ * For example, siblings of the message node are stored as their last node (aka leaf node).
+ */
+export interface MessageDisplay {
+  msg: Message | PendingMessage;
+  siblingLeafNodeIds: Message['id'][];
+  siblingCurrIdx: number;
+  isPending?: boolean;
+}
+
+/**
+ * If the current URL contains "?m=...", prefill the message input with the value.
+ * If the current URL contains "?q=...", prefill and SEND the message.
+ */
+const prefilledMsg = {
+  content() {
+    const url = new URL(window.location.href);
+    return url.searchParams.get('m') ?? url.searchParams.get('q') ?? '';
+  },
+  shouldSend() {
+    const url = new URL(window.location.href);
+    return url.searchParams.has('q');
+  },
+  clear() {
+    cleanCurrentUrl(['m', 'q']);
+  },
+};
+
+function getListMessageDisplay(
+  msgs: Readonly<Message[]>,
+  leafNodeId: Message['id']
+): MessageDisplay[] {
+  const currNodes = StorageUtils.filterByLeafNodeId(msgs, leafNodeId, true);
+  const res: MessageDisplay[] = [];
+  const nodeMap = new Map<Message['id'], Message>();
+  for (const msg of msgs) {
+    nodeMap.set(msg.id, msg);
+  }
+  // find leaf node from a message node
+  const findLeafNode = (msgId: Message['id']): Message['id'] => {
+    let currNode: Message | undefined = nodeMap.get(msgId);
+    while (currNode) {
+      if (currNode.children.length === 0) break;
+      currNode = nodeMap.get(currNode.children.at(-1) ?? -1);
+    }
+    return currNode?.id ?? -1;
+  };
+  // traverse the current nodes
+  for (const msg of currNodes) {
+    const parentNode = nodeMap.get(msg.parent ?? -1);
+    if (!parentNode) continue;
+    const siblings = parentNode.children;
+    if (msg.type !== 'root') {
+      res.push({
+        msg,
+        siblingLeafNodeIds: siblings.map(findLeafNode),
+        siblingCurrIdx: siblings.indexOf(msg.id),
+      });
+    }
+  }
+  return res;
+}
+
+const scrollToBottom = throttle(
+  (requiresNearBottom: boolean, delay: number = 80) => {
+    const mainScrollElem = document.getElementById('main-scroll');
+    if (!mainScrollElem) return;
+    const spaceToBottom =
+      mainScrollElem.scrollHeight -
+      mainScrollElem.scrollTop -
+      mainScrollElem.clientHeight;
+    if (!requiresNearBottom || spaceToBottom < 50) {
+      setTimeout(
+        () => mainScrollElem.scrollTo({ top: mainScrollElem.scrollHeight }),
+        delay
+      );
+    }
+  },
+  80
+);
+
+export default function ChatScreen() {
+  const {
+    viewingChat,
+    sendMessage,
+    isGenerating,
+    stopGenerating,
+    pendingMessages,
+    canvasData,
+    replaceMessageAndGenerate,
+  } = useAppContext();
+
+  const textarea: ChatTextareaApi = useChatTextarea(prefilledMsg.content());
+
+  const { extraContext, clearExtraContext } = useVSCodeContext(textarea);
+  // TODO: improve this when we have "upload file" feature
+  const currExtra: Message['extra'] = extraContext ? [extraContext] : undefined;
+
+  // keep track of leaf node for rendering
+  const [currNodeId, setCurrNodeId] = useState<number>(-1);
+  const messages: MessageDisplay[] = useMemo(() => {
+    if (!viewingChat) return [];
+    else return getListMessageDisplay(viewingChat.messages, currNodeId);
+  }, [currNodeId, viewingChat]);
+
+  const currConvId = viewingChat?.conv.id ?? null;
+  const pendingMsg: PendingMessage | undefined =
+    pendingMessages[currConvId ?? ''];
+
+  useEffect(() => {
+    // reset to latest node when conversation changes
+    setCurrNodeId(-1);
+    // scroll to bottom when conversation changes
+    scrollToBottom(false, 1);
+  }, [currConvId]);
+
+  const onChunk: CallbackGeneratedChunk = (currLeafNodeId?: Message['id']) => {
+    if (currLeafNodeId) {
+      setCurrNodeId(currLeafNodeId);
+    }
+    scrollToBottom(true);
+  };
+
+  const sendNewMessage = async () => {
+    const lastInpMsg = textarea.value();
+    if (lastInpMsg.trim().length === 0 || isGenerating(currConvId ?? ''))
+      return;
+    textarea.setValue('');
+    scrollToBottom(false);
+    setCurrNodeId(-1);
+    // get the last message node
+    const lastMsgNodeId = messages.at(-1)?.msg.id ?? null;
+    if (
+      !(await sendMessage(
+        currConvId,
+        lastMsgNodeId,
+        lastInpMsg,
+        currExtra,
+        onChunk
+      ))
+    ) {
+      // restore the input message if failed
+      textarea.setValue(lastInpMsg);
+    }
+    // OK
+    clearExtraContext();
+  };
+
+  const handleEditMessage = async (msg: Message, content: string) => {
+    if (!viewingChat) return;
+    setCurrNodeId(msg.id);
+    scrollToBottom(false);
+    await replaceMessageAndGenerate(
+      viewingChat.conv.id,
+      msg.parent,
+      content,
+      msg.extra,
+      onChunk
+    );
+    setCurrNodeId(-1);
+    scrollToBottom(false);
+  };
+
+  const handleRegenerateMessage = async (msg: Message) => {
+    if (!viewingChat) return;
+    setCurrNodeId(msg.parent);
+    scrollToBottom(false);
+    await replaceMessageAndGenerate(
+      viewingChat.conv.id,
+      msg.parent,
+      null,
+      msg.extra,
+      onChunk
+    );
+    setCurrNodeId(-1);
+    scrollToBottom(false);
+  };
+
+  const hasCanvas = !!canvasData;
+
+  useEffect(() => {
+    if (prefilledMsg.shouldSend()) {
+      // send the prefilled message if needed
+      sendNewMessage();
+    } else {
+      // otherwise, focus on the input
+      textarea.focus();
+    }
+    prefilledMsg.clear();
+    // no need to keep track of sendNewMessage
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [textarea.ref]);
+
+  // due to some timing issues of StorageUtils.appendMsg(), we need to make sure the pendingMsg is not duplicated upon rendering (i.e. appears once in the saved conversation and once in the pendingMsg)
+  const pendingMsgDisplay: MessageDisplay[] =
+    pendingMsg && messages.at(-1)?.msg.id !== pendingMsg.id
+      ? [
+          {
+            msg: pendingMsg,
+            siblingLeafNodeIds: [],
+            siblingCurrIdx: 0,
+            isPending: true,
+          },
+        ]
+      : [];
+
+  return (
+    <div
+      className={classNames({
+        'grid lg:gap-8 grow transition-[300ms]': true,
+        'grid-cols-[1fr_0fr] lg:grid-cols-[1fr_1fr]': hasCanvas, // adapted for mobile
+        'grid-cols-[1fr_0fr]': !hasCanvas,
+      })}
+    >
+      <div
+        className={classNames({
+          'flex flex-col w-full max-w-[900px] mx-auto': true,
+          'hidden lg:flex': hasCanvas, // adapted for mobile
+          flex: !hasCanvas,
+        })}
+      >
+        {/* chat messages */}
+        <div id="messages-list" className="grow">
+          <div className="mt-auto flex justify-center">
+            {/* placeholder to shift the message to the bottom */}
+            {viewingChat ? '' : 'Send a message to start'}
+          </div>
+          {[...messages, ...pendingMsgDisplay].map((msg) => (
+            <ChatMessage
+              key={msg.msg.id}
+              msg={msg.msg}
+              siblingLeafNodeIds={msg.siblingLeafNodeIds}
+              siblingCurrIdx={msg.siblingCurrIdx}
+              onRegenerateMessage={handleRegenerateMessage}
+              onEditMessage={handleEditMessage}
+              onChangeSibling={setCurrNodeId}
+            />
+          ))}
+        </div>
+
+        {/* chat input */}
+        <div className="flex flex-row items-end pt-8 pb-6 sticky bottom-0 bg-base-100">
+          <textarea
+            // Default (mobile): Enable vertical resize, overflow auto for scrolling if needed
+            // Large screens (lg:): Disable manual resize, apply max-height for autosize limit
+            className="textarea textarea-bordered w-full resize-vertical lg:resize-none lg:max-h-48 lg:overflow-y-auto" // Adjust lg:max-h-48 as needed (e.g., lg:max-h-60)
+            placeholder="Type a message (Shift+Enter to add a new line)"
+            ref={textarea.ref}
+            onInput={textarea.onInput} // Hook's input handler (will only resize height on lg+ screens)
+            onKeyDown={(e) => {
+              if (e.nativeEvent.isComposing || e.keyCode === 229) return;
+              if (e.key === 'Enter' && !e.shiftKey) {
+                e.preventDefault();
+                sendNewMessage();
+              }
+            }}
+            id="msg-input"
+            dir="auto"
+            // Set a base height of 2 rows for mobile views
+            // On lg+ screens, the hook will calculate and set the initial height anyway
+            rows={2}
+          ></textarea>
+
+          {isGenerating(currConvId ?? '') ? (
+            <button
+              className="btn btn-neutral ml-2"
+              onClick={() => stopGenerating(currConvId ?? '')}
+            >
+              Stop
+            </button>
+          ) : (
+            <button className="btn btn-primary ml-2" onClick={sendNewMessage}>
+              Send
+            </button>
+          )}
+        </div>
+      </div>
+      <div className="w-full sticky top-[7em] h-[calc(100vh-9em)]">
+        {canvasData?.type === CanvasType.PY_INTERPRETER && (
+          <CanvasPyInterpreter />
+        )}
+      </div>
+    </div>
+  );
+}

tools/server/webui/src/components/Header.tsx

@@ -0,0 +1,178 @@
+import { useEffect, useState } from 'react';
+import StorageUtils from '../utils/storage';
+import { useAppContext } from '../utils/app.context';
+import { classNames } from '../utils/misc';
+import daisyuiThemes from 'daisyui/theme/object';
+import { THEMES } from '../Config';
+import { useNavigate } from 'react-router';
+
+export default function Header() {
+  const navigate = useNavigate();
+  const [selectedTheme, setSelectedTheme] = useState(StorageUtils.getTheme());
+  const { setShowSettings } = useAppContext();
+
+  const setTheme = (theme: string) => {
+    StorageUtils.setTheme(theme);
+    setSelectedTheme(theme);
+  };
+
+  useEffect(() => {
+    document.body.setAttribute('data-theme', selectedTheme);
+    document.body.setAttribute(
+      'data-color-scheme',
+      daisyuiThemes[selectedTheme]?.['color-scheme'] ?? 'auto'
+    );
+  }, [selectedTheme]);
+
+  const { isGenerating, viewingChat } = useAppContext();
+  const isCurrConvGenerating = isGenerating(viewingChat?.conv.id ?? '');
+
+  const removeConversation = () => {
+    if (isCurrConvGenerating || !viewingChat) return;
+    const convId = viewingChat?.conv.id;
+    if (window.confirm('Are you sure to delete this conversation?')) {
+      StorageUtils.remove(convId);
+      navigate('/');
+    }
+  };
+
+  const downloadConversation = () => {
+    if (isCurrConvGenerating || !viewingChat) return;
+    const convId = viewingChat?.conv.id;
+    const conversationJson = JSON.stringify(viewingChat, null, 2);
+    const blob = new Blob([conversationJson], { type: 'application/json' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `conversation_${convId}.json`;
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+  };
+
+  return (
+    <div className="flex flex-row items-center pt-6 pb-6 sticky top-0 z-10 bg-base-100">
+      {/* open sidebar button */}
+      <label htmlFor="toggle-drawer" className="btn btn-ghost lg:hidden">
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="16"
+          height="16"
+          fill="currentColor"
+          className="bi bi-list"
+          viewBox="0 0 16 16"
+        >
+          <path
+            fillRule="evenodd"
+            d="M2.5 12a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5m0-4a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5m0-4a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5"
+          />
+        </svg>
+      </label>
+
+      <div className="grow text-2xl font-bold ml-2">llama.cpp</div>
+
+      {/* action buttons (top right) */}
+      <div className="flex items-center">
+        {viewingChat && (
+          <div className="dropdown dropdown-end">
+            {/* "..." button */}
+            <button
+              tabIndex={0}
+              role="button"
+              className="btn m-1"
+              disabled={isCurrConvGenerating}
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                width="16"
+                height="16"
+                fill="currentColor"
+                className="bi bi-three-dots-vertical"
+                viewBox="0 0 16 16"
+              >
+                <path d="M9.5 13a1.5 1.5 0 1 1-3 0 1.5 1.5 0 0 1 3 0m0-5a1.5 1.5 0 1 1-3 0 1.5 1.5 0 0 1 3 0m0-5a1.5 1.5 0 1 1-3 0 1.5 1.5 0 0 1 3 0" />
+              </svg>
+            </button>
+            {/* dropdown menu */}
+            <ul
+              tabIndex={0}
+              className="dropdown-content menu bg-base-100 rounded-box z-[1] w-52 p-2 shadow"
+            >
+              <li onClick={downloadConversation}>
+                <a>Download</a>
+              </li>
+              <li className="text-error" onClick={removeConversation}>
+                <a>Delete</a>
+              </li>
+            </ul>
+          </div>
+        )}
+
+        <div className="tooltip tooltip-bottom" data-tip="Settings">
+          <button className="btn" onClick={() => setShowSettings(true)}>
+            {/* settings button */}
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              width="16"
+              height="16"
+              fill="currentColor"
+              className="bi bi-gear"
+              viewBox="0 0 16 16"
+            >
+              <path d="M8 4.754a3.246 3.246 0 1 0 0 6.492 3.246 3.246 0 0 0 0-6.492M5.754 8a2.246 2.246 0 1 1 4.492 0 2.246 2.246 0 0 1-4.492 0" />
+              <path d="M9.796 1.343c-.527-1.79-3.065-1.79-3.592 0l-.094.319a.873.873 0 0 1-1.255.52l-.292-.16c-1.64-.892-3.433.902-2.54 2.541l.159.292a.873.873 0 0 1-.52 1.255l-.319.094c-1.79.527-1.79 3.065 0 3.592l.319.094a.873.873 0 0 1 .52 1.255l-.16.292c-.892 1.64.901 3.434 2.541 2.54l.292-.159a.873.873 0 0 1 1.255.52l.094.319c.527 1.79 3.065 1.79 3.592 0l.094-.319a.873.873 0 0 1 1.255-.52l.292.16c1.64.893 3.434-.902 2.54-2.541l-.159-.292a.873.873 0 0 1 .52-1.255l.319-.094c1.79-.527 1.79-3.065 0-3.592l-.319-.094a.873.873 0 0 1-.52-1.255l.16-.292c.893-1.64-.902-3.433-2.541-2.54l-.292.159a.873.873 0 0 1-1.255-.52zm-2.633.283c.246-.835 1.428-.835 1.674 0l.094.319a1.873 1.873 0 0 0 2.693 1.115l.291-.16c.764-.415 1.6.42 1.184 1.185l-.159.292a1.873 1.873 0 0 0 1.116 2.692l.318.094c.835.246.835 1.428 0 1.674l-.319.094a1.873 1.873 0 0 0-1.115 2.693l.16.291c.415.764-.42 1.6-1.185 1.184l-.291-.159a1.873 1.873 0 0 0-2.693 1.116l-.094.318c-.246.835-1.428.835-1.674 0l-.094-.319a1.873 1.873 0 0 0-2.692-1.115l-.292.16c-.764.415-1.6-.42-1.184-1.185l.159-.291A1.873 1.873 0 0 0 1.945 8.93l-.319-.094c-.835-.246-.835-1.428 0-1.674l.319-.094A1.873 1.873 0 0 0 3.06 4.377l-.16-.292c-.415-.764.42-1.6 1.185-1.184l.292.159a1.873 1.873 0 0 0 2.692-1.115z" />
+            </svg>
+          </button>
+        </div>
+
+        {/* theme controller is copied from https://daisyui.com/components/theme-controller/ */}
+        <div className="tooltip tooltip-bottom" data-tip="Themes">
+          <div className="dropdown dropdown-end dropdown-bottom">
+            <div tabIndex={0} role="button" className="btn m-1">
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                width="16"
+                height="16"
+                fill="currentColor"
+                className="bi bi-palette2"
+                viewBox="0 0 16 16"
+              >
+                <path d="M0 .5A.5.5 0 0 1 .5 0h5a.5.5 0 0 1 .5.5v5.277l4.147-4.131a.5.5 0 0 1 .707 0l3.535 3.536a.5.5 0 0 1 0 .708L10.261 10H15.5a.5.5 0 0 1 .5.5v5a.5.5 0 0 1-.5.5H3a3 3 0 0 1-2.121-.879A3 3 0 0 1 0 13.044m6-.21 7.328-7.3-2.829-2.828L6 7.188zM4.5 13a1.5 1.5 0 1 0-3 0 1.5 1.5 0 0 0 3 0M15 15v-4H9.258l-4.015 4zM0 .5v12.495zm0 12.495V13z" />
+              </svg>
+            </div>
+            <ul
+              tabIndex={0}
+              className="dropdown-content bg-base-300 rounded-box z-[1] w-52 p-2 shadow-2xl h-80 overflow-y-auto"
+            >
+              <li>
+                <button
+                  className={classNames({
+                    'btn btn-sm btn-block btn-ghost justify-start': true,
+                    'btn-active': selectedTheme === 'auto',
+                  })}
+                  onClick={() => setTheme('auto')}
+                >
+                  auto
+                </button>
+              </li>
+              {THEMES.map((theme) => (
+                <li key={theme}>
+                  <input
+                    type="radio"
+                    name="theme-dropdown"
+                    className="theme-controller btn btn-sm btn-block btn-ghost justify-start"
+                    aria-label={theme}
+                    value={theme}
+                    checked={selectedTheme === theme}
+                    onChange={(e) => e.target.checked && setTheme(theme)}
+                  />
+                </li>
+              ))}
+            </ul>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

tools/server/webui/src/components/MarkdownDisplay.tsx

@@ -0,0 +1,310 @@
+import React, { useMemo, useState } from 'react';
+import Markdown, { ExtraProps } from 'react-markdown';
+import remarkGfm from 'remark-gfm';
+import rehypeHightlight from 'rehype-highlight';
+import rehypeKatex from 'rehype-katex';
+import remarkMath from 'remark-math';
+import remarkBreaks from 'remark-breaks';
+import 'katex/dist/katex.min.css';
+import { classNames, copyStr } from '../utils/misc';
+import { ElementContent, Root } from 'hast';
+import { visit } from 'unist-util-visit';
+import { useAppContext } from '../utils/app.context';
+import { CanvasType } from '../utils/types';
+
+export default function MarkdownDisplay({
+  content,
+  isGenerating,
+}: {
+  content: string;
+  isGenerating?: boolean;
+}) {
+  const preprocessedContent = useMemo(
+    () => preprocessLaTeX(content),
+    [content]
+  );
+  return (
+    <Markdown
+      remarkPlugins={[remarkGfm, remarkMath, remarkBreaks]}
+      rehypePlugins={[rehypeHightlight, rehypeKatex, rehypeCustomCopyButton]}
+      components={{
+        button: (props) => (
+          <CodeBlockButtons
+            {...props}
+            isGenerating={isGenerating}
+            origContent={preprocessedContent}
+          />
+        ),
+        // note: do not use "pre", "p" or other basic html elements here, it will cause the node to re-render when the message is being generated (this should be a bug with react-markdown, not sure how to fix it)
+      }}
+    >
+      {preprocessedContent}
+    </Markdown>
+  );
+}
+
+const CodeBlockButtons: React.ElementType<
+  React.ClassAttributes<HTMLButtonElement> &
+    React.HTMLAttributes<HTMLButtonElement> &
+    ExtraProps & { origContent: string; isGenerating?: boolean }
+> = ({ node, origContent, isGenerating }) => {
+  const { config } = useAppContext();
+  const startOffset = node?.position?.start.offset ?? 0;
+  const endOffset = node?.position?.end.offset ?? 0;
+
+  const copiedContent = useMemo(
+    () =>
+      origContent
+        .substring(startOffset, endOffset)
+        .replace(/^```[^\n]+\n/g, '')
+        .replace(/```$/g, ''),
+    [origContent, startOffset, endOffset]
+  );
+
+  const codeLanguage = useMemo(
+    () =>
+      origContent
+        .substring(startOffset, startOffset + 10)
+        .match(/^```([^\n]+)\n/)?.[1] ?? '',
+    [origContent, startOffset]
+  );
+
+  const canRunCode =
+    !isGenerating &&
+    config.pyIntepreterEnabled &&
+    codeLanguage.startsWith('py');
+
+  return (
+    <div
+      className={classNames({
+        'text-right sticky top-[7em] mb-2 mr-2 h-0': true,
+        'display-none': !node?.position,
+      })}
+    >
+      <CopyButton className="badge btn-mini" content={copiedContent} />
+      {canRunCode && (
+        <RunPyCodeButton
+          className="badge btn-mini ml-2"
+          content={copiedContent}
+        />
+      )}
+    </div>
+  );
+};
+
+export const CopyButton = ({
+  content,
+  className,
+}: {
+  content: string;
+  className?: string;
+}) => {
+  const [copied, setCopied] = useState(false);
+  return (
+    <button
+      className={className}
+      onClick={() => {
+        copyStr(content);
+        setCopied(true);
+      }}
+      onMouseLeave={() => setCopied(false)}
+    >
+      {copied ? 'Copied!' : '📋 Copy'}
+    </button>
+  );
+};
+
+export const RunPyCodeButton = ({
+  content,
+  className,
+}: {
+  content: string;
+  className?: string;
+}) => {
+  const { setCanvasData } = useAppContext();
+  return (
+    <>
+      <button
+        className={className}
+        onClick={() =>
+          setCanvasData({
+            type: CanvasType.PY_INTERPRETER,
+            content,
+          })
+        }
+      >
+        ▶️ Run
+      </button>
+    </>
+  );
+};
+
+/**
+ * This injects the "button" element before each "pre" element.
+ * The actual button will be replaced with a react component in the MarkdownDisplay.
+ * We don't replace "pre" node directly because it will cause the node to re-render, which causes this bug: https://github.com/ggerganov/llama.cpp/issues/9608
+ */
+function rehypeCustomCopyButton() {
+  return function (tree: Root) {
+    visit(tree, 'element', function (node) {
+      if (node.tagName === 'pre' && !node.properties.visited) {
+        const preNode = { ...node };
+        // replace current node
+        preNode.properties.visited = 'true';
+        node.tagName = 'div';
+        node.properties = {};
+        // add node for button
+        const btnNode: ElementContent = {
+          type: 'element',
+          tagName: 'button',
+          properties: {},
+          children: [],
+          position: node.position,
+        };
+        node.children = [btnNode, preNode];
+      }
+    });
+  };
+}
+
+/**
+ * The part below is copied and adapted from:
+ * https://github.com/danny-avila/LibreChat/blob/main/client/src/utils/latex.ts
+ * (MIT License)
+ */
+
+// Regex to check if the processed content contains any potential LaTeX patterns
+const containsLatexRegex =
+  /\\\(.*?\\\)|\\\[.*?\\\]|\$.*?\$|\\begin\{equation\}.*?\\end\{equation\}/;
+
+// Regex for inline and block LaTeX expressions
+const inlineLatex = new RegExp(/\\\((.+?)\\\)/, 'g');
+const blockLatex = new RegExp(/\\\[(.*?[^\\])\\\]/, 'gs');
+
+// Function to restore code blocks
+const restoreCodeBlocks = (content: string, codeBlocks: string[]) => {
+  return content.replace(
+    /<<CODE_BLOCK_(\d+)>>/g,
+    (_, index) => codeBlocks[index]
+  );
+};
+
+// Regex to identify code blocks and inline code
+const codeBlockRegex = /(```[\s\S]*?```|`.*?`)/g;
+
+export const processLaTeX = (_content: string) => {
+  let content = _content;
+  // Temporarily replace code blocks and inline code with placeholders
+  const codeBlocks: string[] = [];
+  let index = 0;
+  content = content.replace(codeBlockRegex, (match) => {
+    codeBlocks[index] = match;
+    return `<<CODE_BLOCK_${index++}>>`;
+  });
+
+  // Escape dollar signs followed by a digit or space and digit
+  let processedContent = content.replace(/(\$)(?=\s?\d)/g, '\\$');
+
+  // If no LaTeX patterns are found, restore code blocks and return the processed content
+  if (!containsLatexRegex.test(processedContent)) {
+    return restoreCodeBlocks(processedContent, codeBlocks);
+  }
+
+  // Convert LaTeX expressions to a markdown compatible format
+  processedContent = processedContent
+    .replace(inlineLatex, (_: string, equation: string) => `$${equation}$`) // Convert inline LaTeX
+    .replace(blockLatex, (_: string, equation: string) => `$$${equation}$$`); // Convert block LaTeX
+
+  // Restore code blocks
+  return restoreCodeBlocks(processedContent, codeBlocks);
+};
+
+/**
+ * Preprocesses LaTeX content by replacing delimiters and escaping certain characters.
+ *
+ * @param content The input string containing LaTeX expressions.
+ * @returns The processed string with replaced delimiters and escaped characters.
+ */
+export function preprocessLaTeX(content: string): string {
+  // Step 1: Protect code blocks
+  const codeBlocks: string[] = [];
+  content = content.replace(/(```[\s\S]*?```|`[^`\n]+`)/g, (_, code) => {
+    codeBlocks.push(code);
+    return `<<CODE_BLOCK_${codeBlocks.length - 1}>>`;
+  });
+
+  // Step 2: Protect existing LaTeX expressions
+  const latexExpressions: string[] = [];
+
+  // Protect block math ($$...$$), \[...\], and \(...\) as before.
+  content = content.replace(
+    /(\$\$[\s\S]*?\$\$|\\\[[\s\S]*?\\\]|\\\(.*?\\\))/g,
+    (match) => {
+      latexExpressions.push(match);
+      return `<<LATEX_${latexExpressions.length - 1}>>`;
+    }
+  );
+
+  // Protect inline math ($...$) only if it does NOT match a currency pattern.
+  // We assume a currency pattern is one where the inner content is purely numeric (with optional decimals).
+  content = content.replace(/\$([^$]+)\$/g, (match, inner) => {
+    if (/^\s*\d+(?:\.\d+)?\s*$/.test(inner)) {
+      // This looks like a currency value (e.g. "$123" or "$12.34"),
+      // so don't protect it.
+      return match;
+    } else {
+      // Otherwise, treat it as a LaTeX expression.
+      latexExpressions.push(match);
+      return `<<LATEX_${latexExpressions.length - 1}>>`;
+    }
+  });
+
+  // Step 3: Escape dollar signs that are likely currency indicators.
+  // (Now that inline math is protected, this will only escape dollars not already protected)
+  content = content.replace(/\$(?=\d)/g, '\\$');
+
+  // Step 4: Restore LaTeX expressions
+  content = content.replace(
+    /<<LATEX_(\d+)>>/g,
+    (_, index) => latexExpressions[parseInt(index)]
+  );
+
+  // Step 5: Restore code blocks
+  content = content.replace(
+    /<<CODE_BLOCK_(\d+)>>/g,
+    (_, index) => codeBlocks[parseInt(index)]
+  );
+
+  // Step 6: Apply additional escaping functions
+  content = escapeBrackets(content);
+  content = escapeMhchem(content);
+
+  return content;
+}
+
+export function escapeBrackets(text: string): string {
+  const pattern =
+    /(```[\S\s]*?```|`.*?`)|\\\[([\S\s]*?[^\\])\\]|\\\((.*?)\\\)/g;
+  return text.replace(
+    pattern,
+    (
+      match: string,
+      codeBlock: string | undefined,
+      squareBracket: string | undefined,
+      roundBracket: string | undefined
+    ): string => {
+      if (codeBlock != null) {
+        return codeBlock;
+      } else if (squareBracket != null) {
+        return `$$${squareBracket}$$`;
+      } else if (roundBracket != null) {
+        return `$${roundBracket}$`;
+      }
+      return match;
+    }
+  );
+}
+
+export function escapeMhchem(text: string) {
+  return text.replaceAll('$\\ce{', '$\\\\ce{').replaceAll('$\\pu{', '$\\\\pu{');
+}

tools/server/webui/src/components/SettingDialog.tsx

@@ -0,0 +1,536 @@
+import { useState } from 'react';
+import { useAppContext } from '../utils/app.context';
+import { CONFIG_DEFAULT, CONFIG_INFO } from '../Config';
+import { isDev } from '../Config';
+import StorageUtils from '../utils/storage';
+import { classNames, isBoolean, isNumeric, isString } from '../utils/misc';
+import {
+  BeakerIcon,
+  ChatBubbleOvalLeftEllipsisIcon,
+  Cog6ToothIcon,
+  FunnelIcon,
+  HandRaisedIcon,
+  SquaresPlusIcon,
+} from '@heroicons/react/24/outline';
+import { OpenInNewTab } from '../utils/common';
+
+type SettKey = keyof typeof CONFIG_DEFAULT;
+
+const BASIC_KEYS: SettKey[] = [
+  'temperature',
+  'top_k',
+  'top_p',
+  'min_p',
+  'max_tokens',
+];
+const SAMPLER_KEYS: SettKey[] = [
+  'dynatemp_range',
+  'dynatemp_exponent',
+  'typical_p',
+  'xtc_probability',
+  'xtc_threshold',
+];
+const PENALTY_KEYS: SettKey[] = [
+  'repeat_last_n',
+  'repeat_penalty',
+  'presence_penalty',
+  'frequency_penalty',
+  'dry_multiplier',
+  'dry_base',
+  'dry_allowed_length',
+  'dry_penalty_last_n',
+];
+
+enum SettingInputType {
+  SHORT_INPUT,
+  LONG_INPUT,
+  CHECKBOX,
+  CUSTOM,
+}
+
+interface SettingFieldInput {
+  type: Exclude<SettingInputType, SettingInputType.CUSTOM>;
+  label: string | React.ReactElement;
+  help?: string | React.ReactElement;
+  key: SettKey;
+}
+
+interface SettingFieldCustom {
+  type: SettingInputType.CUSTOM;
+  key: SettKey;
+  component:
+    | string
+    | React.FC<{
+        value: string | boolean | number;
+        onChange: (value: string) => void;
+      }>;
+}
+
+interface SettingSection {
+  title: React.ReactElement;
+  fields: (SettingFieldInput | SettingFieldCustom)[];
+}
+
+const ICON_CLASSNAME = 'w-4 h-4 mr-1 inline';
+
+const SETTING_SECTIONS: SettingSection[] = [
+  {
+    title: (
+      <>
+        <Cog6ToothIcon className={ICON_CLASSNAME} />
+        General
+      </>
+    ),
+    fields: [
+      {
+        type: SettingInputType.SHORT_INPUT,
+        label: 'API Key',
+        key: 'apiKey',
+      },
+      {
+        type: SettingInputType.LONG_INPUT,
+        label: 'System Message (will be disabled if left empty)',
+        key: 'systemMessage',
+      },
+      ...BASIC_KEYS.map(
+        (key) =>
+          ({
+            type: SettingInputType.SHORT_INPUT,
+            label: key,
+            key,
+          }) as SettingFieldInput
+      ),
+    ],
+  },
+  {
+    title: (
+      <>
+        <FunnelIcon className={ICON_CLASSNAME} />
+        Samplers
+      </>
+    ),
+    fields: [
+      {
+        type: SettingInputType.SHORT_INPUT,
+        label: 'Samplers queue',
+        key: 'samplers',
+      },
+      ...SAMPLER_KEYS.map(
+        (key) =>
+          ({
+            type: SettingInputType.SHORT_INPUT,
+            label: key,
+            key,
+          }) as SettingFieldInput
+      ),
+    ],
+  },
+  {
+    title: (
+      <>
+        <HandRaisedIcon className={ICON_CLASSNAME} />
+        Penalties
+      </>
+    ),
+    fields: PENALTY_KEYS.map((key) => ({
+      type: SettingInputType.SHORT_INPUT,
+      label: key,
+      key,
+    })),
+  },
+  {
+    title: (
+      <>
+        <ChatBubbleOvalLeftEllipsisIcon className={ICON_CLASSNAME} />
+        Reasoning
+      </>
+    ),
+    fields: [
+      {
+        type: SettingInputType.CHECKBOX,
+        label: 'Expand thought process by default when generating messages',
+        key: 'showThoughtInProgress',
+      },
+      {
+        type: SettingInputType.CHECKBOX,
+        label:
+          'Exclude thought process when sending requests to API (Recommended for DeepSeek-R1)',
+        key: 'excludeThoughtOnReq',
+      },
+    ],
+  },
+  {
+    title: (
+      <>
+        <SquaresPlusIcon className={ICON_CLASSNAME} />
+        Advanced
+      </>
+    ),
+    fields: [
+      {
+        type: SettingInputType.CUSTOM,
+        key: 'custom', // dummy key, won't be used
+        component: () => {
+          const debugImportDemoConv = async () => {
+            const res = await fetch('/demo-conversation.json');
+            const demoConv = await res.json();
+            StorageUtils.remove(demoConv.id);
+            for (const msg of demoConv.messages) {
+              StorageUtils.appendMsg(demoConv.id, msg);
+            }
+          };
+          return (
+            <button className="btn" onClick={debugImportDemoConv}>
+              (debug) Import demo conversation
+            </button>
+          );
+        },
+      },
+      {
+        type: SettingInputType.CHECKBOX,
+        label: 'Show tokens per second',
+        key: 'showTokensPerSecond',
+      },
+      {
+        type: SettingInputType.LONG_INPUT,
+        label: (
+          <>
+            Custom JSON config (For more info, refer to{' '}
+            <OpenInNewTab href="https://github.com/ggerganov/llama.cpp/blob/master/tools/server/README.md">
+              server documentation
+            </OpenInNewTab>
+            )
+          </>
+        ),
+        key: 'custom',
+      },
+    ],
+  },
+  {
+    title: (
+      <>
+        <BeakerIcon className={ICON_CLASSNAME} />
+        Experimental
+      </>
+    ),
+    fields: [
+      {
+        type: SettingInputType.CUSTOM,
+        key: 'custom', // dummy key, won't be used
+        component: () => (
+          <>
+            <p className="mb-8">
+              Experimental features are not guaranteed to work correctly.
+              <br />
+              <br />
+              If you encounter any problems, create a{' '}
+              <OpenInNewTab href="https://github.com/ggerganov/llama.cpp/issues/new?template=019-bug-misc.yml">
+                Bug (misc.)
+              </OpenInNewTab>{' '}
+              report on Github. Please also specify <b>webui/experimental</b> on
+              the report title and include screenshots.
+              <br />
+              <br />
+              Some features may require packages downloaded from CDN, so they
+              need internet connection.
+            </p>
+          </>
+        ),
+      },
+      {
+        type: SettingInputType.CHECKBOX,
+        label: (
+          <>
+            <b>Enable Python interpreter</b>
+            <br />
+            <small className="text-xs">
+              This feature uses{' '}
+              <OpenInNewTab href="https://pyodide.org">pyodide</OpenInNewTab>,
+              downloaded from CDN. To use this feature, ask the LLM to generate
+              Python code inside a Markdown code block. You will see a "Run"
+              button on the code block, near the "Copy" button.
+            </small>
+          </>
+        ),
+        key: 'pyIntepreterEnabled',
+      },
+    ],
+  },
+];
+
+export default function SettingDialog({
+  show,
+  onClose,
+}: {
+  show: boolean;
+  onClose: () => void;
+}) {
+  const { config, saveConfig } = useAppContext();
+  const [sectionIdx, setSectionIdx] = useState(0);
+
+  // clone the config object to prevent direct mutation
+  const [localConfig, setLocalConfig] = useState<typeof CONFIG_DEFAULT>(
+    JSON.parse(JSON.stringify(config))
+  );
+
+  const resetConfig = () => {
+    if (window.confirm('Are you sure you want to reset all settings?')) {
+      setLocalConfig(CONFIG_DEFAULT);
+    }
+  };
+
+  const handleSave = () => {
+    // copy the local config to prevent direct mutation
+    const newConfig: typeof CONFIG_DEFAULT = JSON.parse(
+      JSON.stringify(localConfig)
+    );
+    // validate the config
+    for (const key in newConfig) {
+      const value = newConfig[key as SettKey];
+      const mustBeBoolean = isBoolean(CONFIG_DEFAULT[key as SettKey]);
+      const mustBeString = isString(CONFIG_DEFAULT[key as SettKey]);
+      const mustBeNumeric = isNumeric(CONFIG_DEFAULT[key as SettKey]);
+      if (mustBeString) {
+        if (!isString(value)) {
+          alert(`Value for ${key} must be string`);
+          return;
+        }
+      } else if (mustBeNumeric) {
+        const trimmedValue = value.toString().trim();
+        const numVal = Number(trimmedValue);
+        if (isNaN(numVal) || !isNumeric(numVal) || trimmedValue.length === 0) {
+          alert(`Value for ${key} must be numeric`);
+          return;
+        }
+        // force conversion to number
+        // @ts-expect-error this is safe
+        newConfig[key] = numVal;
+      } else if (mustBeBoolean) {
+        if (!isBoolean(value)) {
+          alert(`Value for ${key} must be boolean`);
+          return;
+        }
+      } else {
+        console.error(`Unknown default type for key ${key}`);
+      }
+    }
+    if (isDev) console.log('Saving config', newConfig);
+    saveConfig(newConfig);
+    onClose();
+  };
+
+  const onChange = (key: SettKey) => (value: string | boolean) => {
+    // note: we do not perform validation here, because we may get incomplete value as user is still typing it
+    setLocalConfig({ ...localConfig, [key]: value });
+  };
+
+  return (
+    <dialog className={classNames({ modal: true, 'modal-open': show })}>
+      <div className="modal-box w-11/12 max-w-3xl">
+        <h3 className="text-lg font-bold mb-6">Settings</h3>
+        <div className="flex flex-col md:flex-row h-[calc(90vh-12rem)]">
+          {/* Left panel, showing sections - Desktop version */}
+          <div className="hidden md:flex flex-col items-stretch pr-4 mr-4 border-r-2 border-base-200">
+            {SETTING_SECTIONS.map((section, idx) => (
+              <div
+                key={idx}
+                className={classNames({
+                  'btn btn-ghost justify-start font-normal w-44 mb-1': true,
+                  'btn-active': sectionIdx === idx,
+                })}
+                onClick={() => setSectionIdx(idx)}
+                dir="auto"
+              >
+                {section.title}
+              </div>
+            ))}
+          </div>
+
+          {/* Left panel, showing sections - Mobile version */}
+          <div className="md:hidden flex flex-row gap-2 mb-4">
+            <details className="dropdown">
+              <summary className="btn bt-sm w-full m-1">
+                {SETTING_SECTIONS[sectionIdx].title}
+              </summary>
+              <ul className="menu dropdown-content bg-base-100 rounded-box z-[1] w-52 p-2 shadow">
+                {SETTING_SECTIONS.map((section, idx) => (
+                  <div
+                    key={idx}
+                    className={classNames({
+                      'btn btn-ghost justify-start font-normal': true,
+                      'btn-active': sectionIdx === idx,
+                    })}
+                    onClick={() => setSectionIdx(idx)}
+                    dir="auto"
+                  >
+                    {section.title}
+                  </div>
+                ))}
+              </ul>
+            </details>
+          </div>
+
+          {/* Right panel, showing setting fields */}
+          <div className="grow overflow-y-auto px-4">
+            {SETTING_SECTIONS[sectionIdx].fields.map((field, idx) => {
+              const key = `${sectionIdx}-${idx}`;
+              if (field.type === SettingInputType.SHORT_INPUT) {
+                return (
+                  <SettingsModalShortInput
+                    key={key}
+                    configKey={field.key}
+                    value={localConfig[field.key]}
+                    onChange={onChange(field.key)}
+                    label={field.label as string}
+                  />
+                );
+              } else if (field.type === SettingInputType.LONG_INPUT) {
+                return (
+                  <SettingsModalLongInput
+                    key={key}
+                    configKey={field.key}
+                    value={localConfig[field.key].toString()}
+                    onChange={onChange(field.key)}
+                    label={field.label as string}
+                  />
+                );
+              } else if (field.type === SettingInputType.CHECKBOX) {
+                return (
+                  <SettingsModalCheckbox
+                    key={key}
+                    configKey={field.key}
+                    value={!!localConfig[field.key]}
+                    onChange={onChange(field.key)}
+                    label={field.label as string}
+                  />
+                );
+              } else if (field.type === SettingInputType.CUSTOM) {
+                return (
+                  <div key={key} className="mb-2">
+                    {typeof field.component === 'string'
+                      ? field.component
+                      : field.component({
+                          value: localConfig[field.key],
+                          onChange: onChange(field.key),
+                        })}
+                  </div>
+                );
+              }
+            })}
+
+            <p className="opacity-40 mb-6 text-sm mt-8">
+              Settings are saved in browser's localStorage
+            </p>
+          </div>
+        </div>
+
+        <div className="modal-action">
+          <button className="btn" onClick={resetConfig}>
+            Reset to default
+          </button>
+          <button className="btn" onClick={onClose}>
+            Close
+          </button>
+          <button className="btn btn-primary" onClick={handleSave}>
+            Save
+          </button>
+        </div>
+      </div>
+    </dialog>
+  );
+}
+
+function SettingsModalLongInput({
+  configKey,
+  value,
+  onChange,
+  label,
+}: {
+  configKey: SettKey;
+  value: string;
+  onChange: (value: string) => void;
+  label?: string;
+}) {
+  return (
+    <label className="form-control mb-2">
+      <div className="label inline">{label || configKey}</div>
+      <textarea
+        className="textarea textarea-bordered h-24"
+        placeholder={`Default: ${CONFIG_DEFAULT[configKey] || 'none'}`}
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+      />
+    </label>
+  );
+}
+
+function SettingsModalShortInput({
+  configKey,
+  value,
+  onChange,
+  label,
+}: {
+  configKey: SettKey;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  value: any;
+  onChange: (value: string) => void;
+  label?: string;
+}) {
+  const helpMsg = CONFIG_INFO[configKey];
+
+  return (
+    <>
+      {/* on mobile, we simply show the help message here */}
+      {helpMsg && (
+        <div className="block md:hidden mb-1">
+          <b>{label || configKey}</b>
+          <br />
+          <p className="text-xs">{helpMsg}</p>
+        </div>
+      )}
+      <label className="input input-bordered join-item grow flex items-center gap-2 mb-2">
+        <div className="dropdown dropdown-hover">
+          <div tabIndex={0} role="button" className="font-bold hidden md:block">
+            {label || configKey}
+          </div>
+          {helpMsg && (
+            <div className="dropdown-content menu bg-base-100 rounded-box z-10 w-64 p-2 shadow mt-4">
+              {helpMsg}
+            </div>
+          )}
+        </div>
+        <input
+          type="text"
+          className="grow"
+          placeholder={`Default: ${CONFIG_DEFAULT[configKey] || 'none'}`}
+          value={value}
+          onChange={(e) => onChange(e.target.value)}
+        />
+      </label>
+    </>
+  );
+}
+
+function SettingsModalCheckbox({
+  configKey,
+  value,
+  onChange,
+  label,
+}: {
+  configKey: SettKey;
+  value: boolean;
+  onChange: (value: boolean) => void;
+  label: string;
+}) {
+  return (
+    <div className="flex flex-row items-center mb-2">
+      <input
+        type="checkbox"
+        className="toggle"
+        checked={value}
+        onChange={(e) => onChange(e.target.checked)}
+      />
+      <span className="ml-4">{label || configKey}</span>
+    </div>
+  );
+}

tools/server/webui/src/components/Sidebar.tsx

@@ -0,0 +1,96 @@
+import { useEffect, useState } from 'react';
+import { classNames } from '../utils/misc';
+import { Conversation } from '../utils/types';
+import StorageUtils from '../utils/storage';
+import { useNavigate, useParams } from 'react-router';
+
+export default function Sidebar() {
+  const params = useParams();
+  const navigate = useNavigate();
+
+  const [conversations, setConversations] = useState<Conversation[]>([]);
+  const [currConv, setCurrConv] = useState<Conversation | null>(null);
+
+  useEffect(() => {
+    StorageUtils.getOneConversation(params.convId ?? '').then(setCurrConv);
+  }, [params.convId]);
+
+  useEffect(() => {
+    const handleConversationChange = async () => {
+      setConversations(await StorageUtils.getAllConversations());
+    };
+    StorageUtils.onConversationChanged(handleConversationChange);
+    handleConversationChange();
+    return () => {
+      StorageUtils.offConversationChanged(handleConversationChange);
+    };
+  }, []);
+
+  return (
+    <>
+      <input
+        id="toggle-drawer"
+        type="checkbox"
+        className="drawer-toggle"
+        defaultChecked
+      />
+
+      <div className="drawer-side h-screen lg:h-screen z-50 lg:max-w-64">
+        <label
+          htmlFor="toggle-drawer"
+          aria-label="close sidebar"
+          className="drawer-overlay"
+        ></label>
+        <div className="flex flex-col bg-base-200 min-h-full max-w-64 py-4 px-4">
+          <div className="flex flex-row items-center justify-between mb-4 mt-4">
+            <h2 className="font-bold ml-4">Conversations</h2>
+
+            {/* close sidebar button */}
+            <label htmlFor="toggle-drawer" className="btn btn-ghost lg:hidden">
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                width="16"
+                height="16"
+                fill="currentColor"
+                className="bi bi-arrow-bar-left"
+                viewBox="0 0 16 16"
+              >
+                <path
+                  fillRule="evenodd"
+                  d="M12.5 15a.5.5 0 0 1-.5-.5v-13a.5.5 0 0 1 1 0v13a.5.5 0 0 1-.5.5M10 8a.5.5 0 0 1-.5.5H3.707l2.147 2.146a.5.5 0 0 1-.708.708l-3-3a.5.5 0 0 1 0-.708l3-3a.5.5 0 1 1 .708.708L3.707 7.5H9.5a.5.5 0 0 1 .5.5"
+                />
+              </svg>
+            </label>
+          </div>
+
+          {/* list of conversations */}
+          <div
+            className={classNames({
+              'btn btn-ghost justify-start': true,
+              'btn-active': !currConv,
+            })}
+            onClick={() => navigate('/')}
+          >
+            + New conversation
+          </div>
+          {conversations.map((conv) => (
+            <div
+              key={conv.id}
+              className={classNames({
+                'btn btn-ghost justify-start font-normal': true,
+                'btn-active': conv.id === currConv?.id,
+              })}
+              onClick={() => navigate(`/chat/${conv.id}`)}
+              dir="auto"
+            >
+              <span className="truncate">{conv.name}</span>
+            </div>
+          ))}
+          <div className="text-center text-xs opacity-40 mt-auto mx-4">
+            Conversations are saved to browser's IndexedDB
+          </div>
+        </div>
+      </div>
+    </>
+  );
+}

tools/server/webui/src/components/useChatTextarea.ts

@@ -0,0 +1,96 @@
+import { useEffect, useRef, useState, useCallback } from 'react';
+
+// Media Query for detecting "large" screens (matching Tailwind's lg: breakpoint)
+const LARGE_SCREEN_MQ = '(min-width: 1024px)';
+
+// Calculates and sets the textarea height based on its scrollHeight
+const adjustTextareaHeight = (textarea: HTMLTextAreaElement | null) => {
+  if (!textarea) return;
+
+  // Only perform auto-sizing on large screens
+  if (!window.matchMedia(LARGE_SCREEN_MQ).matches) {
+    // On small screens, reset inline height and max-height styles.
+    // This allows CSS (e.g., `rows` attribute or classes) to control the height,
+    // and enables manual resizing if `resize-vertical` is set.
+    textarea.style.height = ''; // Use 'auto' or '' to reset
+    textarea.style.maxHeight = '';
+    return; // Do not adjust height programmatically on small screens
+  }
+
+  const computedStyle = window.getComputedStyle(textarea);
+  // Get the max-height specified by CSS (e.g., from `lg:max-h-48`)
+  const currentMaxHeight = computedStyle.maxHeight;
+
+  // Temporarily remove max-height to allow scrollHeight to be calculated correctly
+  textarea.style.maxHeight = 'none';
+  // Reset height to 'auto' to measure the actual scrollHeight needed
+  textarea.style.height = 'auto';
+  // Set the height to the calculated scrollHeight
+  textarea.style.height = `${textarea.scrollHeight}px`;
+  // Re-apply the original max-height from CSS to enforce the limit
+  textarea.style.maxHeight = currentMaxHeight;
+};
+
+// Interface describing the API returned by the hook
+export interface ChatTextareaApi {
+  value: () => string;
+  setValue: (value: string) => void;
+  focus: () => void;
+  ref: React.RefObject<HTMLTextAreaElement>;
+  onInput: (event: React.FormEvent<HTMLTextAreaElement>) => void; // Input handler
+}
+
+// This is a workaround to prevent the textarea from re-rendering when the inner content changes
+// See https://github.com/ggml-org/llama.cpp/pull/12299
+// combined now with auto-sizing logic.
+export function useChatTextarea(initValue: string): ChatTextareaApi {
+  const [savedInitValue, setSavedInitValue] = useState<string>(initValue);
+  const textareaRef = useRef<HTMLTextAreaElement>(null);
+
+  // Effect to set initial value and height on mount or when initValue changes
+  useEffect(() => {
+    const textarea = textareaRef.current;
+    if (textarea) {
+      if (typeof savedInitValue === 'string' && savedInitValue.length > 0) {
+        textarea.value = savedInitValue;
+        // Call adjustTextareaHeight - it will check screen size internally
+        setTimeout(() => adjustTextareaHeight(textarea), 0);
+        setSavedInitValue(''); // Reset after applying
+      } else {
+        // Adjust height even if there's no initial value (for initial render)
+        setTimeout(() => adjustTextareaHeight(textarea), 0);
+      }
+    }
+  }, [textareaRef, savedInitValue]); // Depend on ref and savedInitValue
+
+  const handleInput = useCallback(
+    (event: React.FormEvent<HTMLTextAreaElement>) => {
+      // Call adjustTextareaHeight on every input - it will decide whether to act
+      adjustTextareaHeight(event.currentTarget);
+    },
+    []
+  );
+
+  return {
+    // Method to get the current value directly from the textarea
+    value: () => {
+      return textareaRef.current?.value ?? '';
+    },
+    // Method to programmatically set the value and trigger height adjustment
+    setValue: (value: string) => {
+      const textarea = textareaRef.current;
+      if (textarea) {
+        textarea.value = value;
+        // Call adjustTextareaHeight - it will check screen size internally
+        setTimeout(() => adjustTextareaHeight(textarea), 0);
+      }
+    },
+    focus: () => {
+      if (textareaRef.current) {
+        textareaRef.current.focus();
+      }
+    },
+    ref: textareaRef,
+    onInput: handleInput,
+  };
+}

tools/server/webui/src/index.scss

@@ -0,0 +1,78 @@
+@use 'sass:meta';
+@use 'tailwindcss';
+
+@plugin 'daisyui' {
+  themes: all;
+}
+
+html {
+  scrollbar-gutter: auto;
+}
+
+.markdown {
+  h1,
+  h2,
+  h3,
+  h4,
+  h5,
+  h6,
+  ul,
+  ol,
+  li {
+    all: revert;
+  }
+  pre {
+    @apply whitespace-pre-wrap rounded-lg p-2;
+    border: 1px solid currentColor;
+  }
+  p {
+    @apply mb-2;
+  }
+  /* TODO: fix markdown table */
+}
+
+.show-on-hover {
+  @apply md:opacity-0 md:group-hover:opacity-100;
+}
+.btn-mini {
+  @apply cursor-pointer hover:shadow-md;
+}
+.chat-screen {
+  max-width: 900px;
+}
+
+.chat-bubble-base-300 {
+  --tw-bg-opacity: 1;
+  --tw-text-opacity: 1;
+  @apply bg-base-300 text-base-content;
+}
+
+/* Highlight.js */
+[data-color-scheme='light'] {
+  @include meta.load-css('highlight.js/styles/stackoverflow-light');
+  .dark-color {
+    @apply bg-base-content text-base-100;
+  }
+}
+[data-color-scheme='dark'] {
+  @include meta.load-css('highlight.js/styles/stackoverflow-dark');
+}
+[data-color-scheme='auto'] {
+  @media (prefers-color-scheme: light) {
+    @include meta.load-css('highlight.js/styles/stackoverflow-light');
+    .dark-color {
+      @apply bg-base-content text-base-100;
+    }
+  }
+  @media (prefers-color-scheme: dark) {
+    @include meta.load-css('highlight.js/styles/stackoverflow-dark');
+  }
+}
+.hljs {
+  background: transparent !important;
+  padding: 0.5em !important;
+}
+
+.katex-display {
+  margin: 0 0 !important;
+}

tools/server/webui/src/main.tsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import './index.scss';
+import App from './App.tsx';
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>
+);

tools/server/webui/src/utils/app.context.tsx

@@ -0,0 +1,387 @@
+import React, { createContext, useContext, useEffect, useState } from 'react';
+import {
+  APIMessage,
+  CanvasData,
+  Conversation,
+  Message,
+  PendingMessage,
+  ViewingChat,
+} from './types';
+import StorageUtils from './storage';
+import {
+  filterThoughtFromMsgs,
+  normalizeMsgsForAPI,
+  getSSEStreamAsync,
+} from './misc';
+import { BASE_URL, CONFIG_DEFAULT, isDev } from '../Config';
+import { matchPath, useLocation, useNavigate } from 'react-router';
+
+interface AppContextValue {
+  // conversations and messages
+  viewingChat: ViewingChat | null;
+  pendingMessages: Record<Conversation['id'], PendingMessage>;
+  isGenerating: (convId: string) => boolean;
+  sendMessage: (
+    convId: string | null,
+    leafNodeId: Message['id'] | null,
+    content: string,
+    extra: Message['extra'],
+    onChunk: CallbackGeneratedChunk
+  ) => Promise<boolean>;
+  stopGenerating: (convId: string) => void;
+  replaceMessageAndGenerate: (
+    convId: string,
+    parentNodeId: Message['id'], // the parent node of the message to be replaced
+    content: string | null,
+    extra: Message['extra'],
+    onChunk: CallbackGeneratedChunk
+  ) => Promise<void>;
+
+  // canvas
+  canvasData: CanvasData | null;
+  setCanvasData: (data: CanvasData | null) => void;
+
+  // config
+  config: typeof CONFIG_DEFAULT;
+  saveConfig: (config: typeof CONFIG_DEFAULT) => void;
+  showSettings: boolean;
+  setShowSettings: (show: boolean) => void;
+}
+
+// this callback is used for scrolling to the bottom of the chat and switching to the last node
+export type CallbackGeneratedChunk = (currLeafNodeId?: Message['id']) => void;
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+const AppContext = createContext<AppContextValue>({} as any);
+
+const getViewingChat = async (convId: string): Promise<ViewingChat | null> => {
+  const conv = await StorageUtils.getOneConversation(convId);
+  if (!conv) return null;
+  return {
+    conv: conv,
+    // all messages from all branches, not filtered by last node
+    messages: await StorageUtils.getMessages(convId),
+  };
+};
+
+export const AppContextProvider = ({
+  children,
+}: {
+  children: React.ReactElement;
+}) => {
+  const { pathname } = useLocation();
+  const navigate = useNavigate();
+  const params = matchPath('/chat/:convId', pathname);
+  const convId = params?.params?.convId;
+
+  const [viewingChat, setViewingChat] = useState<ViewingChat | null>(null);
+  const [pendingMessages, setPendingMessages] = useState<
+    Record<Conversation['id'], PendingMessage>
+  >({});
+  const [aborts, setAborts] = useState<
+    Record<Conversation['id'], AbortController>
+  >({});
+  const [config, setConfig] = useState(StorageUtils.getConfig());
+  const [canvasData, setCanvasData] = useState<CanvasData | null>(null);
+  const [showSettings, setShowSettings] = useState(false);
+
+  // handle change when the convId from URL is changed
+  useEffect(() => {
+    // also reset the canvas data
+    setCanvasData(null);
+    const handleConversationChange = async (changedConvId: string) => {
+      if (changedConvId !== convId) return;
+      setViewingChat(await getViewingChat(changedConvId));
+    };
+    StorageUtils.onConversationChanged(handleConversationChange);
+    getViewingChat(convId ?? '').then(setViewingChat);
+    return () => {
+      StorageUtils.offConversationChanged(handleConversationChange);
+    };
+  }, [convId]);
+
+  const setPending = (convId: string, pendingMsg: PendingMessage | null) => {
+    // if pendingMsg is null, remove the key from the object
+    if (!pendingMsg) {
+      setPendingMessages((prev) => {
+        const newState = { ...prev };
+        delete newState[convId];
+        return newState;
+      });
+    } else {
+      setPendingMessages((prev) => ({ ...prev, [convId]: pendingMsg }));
+    }
+  };
+
+  const setAbort = (convId: string, controller: AbortController | null) => {
+    if (!controller) {
+      setAborts((prev) => {
+        const newState = { ...prev };
+        delete newState[convId];
+        return newState;
+      });
+    } else {
+      setAborts((prev) => ({ ...prev, [convId]: controller }));
+    }
+  };
+
+  ////////////////////////////////////////////////////////////////////////
+  // public functions
+
+  const isGenerating = (convId: string) => !!pendingMessages[convId];
+
+  const generateMessage = async (
+    convId: string,
+    leafNodeId: Message['id'],
+    onChunk: CallbackGeneratedChunk
+  ) => {
+    if (isGenerating(convId)) return;
+
+    const config = StorageUtils.getConfig();
+    const currConversation = await StorageUtils.getOneConversation(convId);
+    if (!currConversation) {
+      throw new Error('Current conversation is not found');
+    }
+
+    const currMessages = StorageUtils.filterByLeafNodeId(
+      await StorageUtils.getMessages(convId),
+      leafNodeId,
+      false
+    );
+    const abortController = new AbortController();
+    setAbort(convId, abortController);
+
+    if (!currMessages) {
+      throw new Error('Current messages are not found');
+    }
+
+    const pendingId = Date.now() + 1;
+    let pendingMsg: PendingMessage = {
+      id: pendingId,
+      convId,
+      type: 'text',
+      timestamp: pendingId,
+      role: 'assistant',
+      content: null,
+      parent: leafNodeId,
+      children: [],
+    };
+    setPending(convId, pendingMsg);
+
+    try {
+      // prepare messages for API
+      let messages: APIMessage[] = [
+        ...(config.systemMessage.length === 0
+          ? []
+          : [{ role: 'system', content: config.systemMessage } as APIMessage]),
+        ...normalizeMsgsForAPI(currMessages),
+      ];
+      if (config.excludeThoughtOnReq) {
+        messages = filterThoughtFromMsgs(messages);
+      }
+      if (isDev) console.log({ messages });
+
+      // prepare params
+      const params = {
+        messages,
+        stream: true,
+        cache_prompt: true,
+        samplers: config.samplers,
+        temperature: config.temperature,
+        dynatemp_range: config.dynatemp_range,
+        dynatemp_exponent: config.dynatemp_exponent,
+        top_k: config.top_k,
+        top_p: config.top_p,
+        min_p: config.min_p,
+        typical_p: config.typical_p,
+        xtc_probability: config.xtc_probability,
+        xtc_threshold: config.xtc_threshold,
+        repeat_last_n: config.repeat_last_n,
+        repeat_penalty: config.repeat_penalty,
+        presence_penalty: config.presence_penalty,
+        frequency_penalty: config.frequency_penalty,
+        dry_multiplier: config.dry_multiplier,
+        dry_base: config.dry_base,
+        dry_allowed_length: config.dry_allowed_length,
+        dry_penalty_last_n: config.dry_penalty_last_n,
+        max_tokens: config.max_tokens,
+        timings_per_token: !!config.showTokensPerSecond,
+        ...(config.custom.length ? JSON.parse(config.custom) : {}),
+      };
+
+      // send request
+      const fetchResponse = await fetch(`${BASE_URL}/v1/chat/completions`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          ...(config.apiKey
+            ? { Authorization: `Bearer ${config.apiKey}` }
+            : {}),
+        },
+        body: JSON.stringify(params),
+        signal: abortController.signal,
+      });
+      if (fetchResponse.status !== 200) {
+        const body = await fetchResponse.json();
+        throw new Error(body?.error?.message || 'Unknown error');
+      }
+      const chunks = getSSEStreamAsync(fetchResponse);
+      for await (const chunk of chunks) {
+        // const stop = chunk.stop;
+        if (chunk.error) {
+          throw new Error(chunk.error?.message || 'Unknown error');
+        }
+        const addedContent = chunk.choices[0].delta.content;
+        const lastContent = pendingMsg.content || '';
+        if (addedContent) {
+          pendingMsg = {
+            ...pendingMsg,
+            content: lastContent + addedContent,
+          };
+        }
+        const timings = chunk.timings;
+        if (timings && config.showTokensPerSecond) {
+          // only extract what's really needed, to save some space
+          pendingMsg.timings = {
+            prompt_n: timings.prompt_n,
+            prompt_ms: timings.prompt_ms,
+            predicted_n: timings.predicted_n,
+            predicted_ms: timings.predicted_ms,
+          };
+        }
+        setPending(convId, pendingMsg);
+        onChunk(); // don't need to switch node for pending message
+      }
+    } catch (err) {
+      setPending(convId, null);
+      if ((err as Error).name === 'AbortError') {
+        // user stopped the generation via stopGeneration() function
+        // we can safely ignore this error
+      } else {
+        console.error(err);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        alert((err as any)?.message ?? 'Unknown error');
+        throw err; // rethrow
+      }
+    }
+
+    if (pendingMsg.content !== null) {
+      await StorageUtils.appendMsg(pendingMsg as Message, leafNodeId);
+    }
+    setPending(convId, null);
+    onChunk(pendingId); // trigger scroll to bottom and switch to the last node
+  };
+
+  const sendMessage = async (
+    convId: string | null,
+    leafNodeId: Message['id'] | null,
+    content: string,
+    extra: Message['extra'],
+    onChunk: CallbackGeneratedChunk
+  ): Promise<boolean> => {
+    if (isGenerating(convId ?? '') || content.trim().length === 0) return false;
+
+    if (convId === null || convId.length === 0 || leafNodeId === null) {
+      const conv = await StorageUtils.createConversation(
+        content.substring(0, 256)
+      );
+      convId = conv.id;
+      leafNodeId = conv.currNode;
+      // if user is creating a new conversation, redirect to the new conversation
+      navigate(`/chat/${convId}`);
+    }
+
+    const now = Date.now();
+    const currMsgId = now;
+    StorageUtils.appendMsg(
+      {
+        id: currMsgId,
+        timestamp: now,
+        type: 'text',
+        convId,
+        role: 'user',
+        content,
+        extra,
+        parent: leafNodeId,
+        children: [],
+      },
+      leafNodeId
+    );
+    onChunk(currMsgId);
+
+    try {
+      await generateMessage(convId, currMsgId, onChunk);
+      return true;
+    } catch (_) {
+      // TODO: rollback
+    }
+    return false;
+  };
+
+  const stopGenerating = (convId: string) => {
+    setPending(convId, null);
+    aborts[convId]?.abort();
+  };
+
+  // if content is undefined, we remove last assistant message
+  const replaceMessageAndGenerate = async (
+    convId: string,
+    parentNodeId: Message['id'], // the parent node of the message to be replaced
+    content: string | null,
+    extra: Message['extra'],
+    onChunk: CallbackGeneratedChunk
+  ) => {
+    if (isGenerating(convId)) return;
+
+    if (content !== null) {
+      const now = Date.now();
+      const currMsgId = now;
+      StorageUtils.appendMsg(
+        {
+          id: currMsgId,
+          timestamp: now,
+          type: 'text',
+          convId,
+          role: 'user',
+          content,
+          extra,
+          parent: parentNodeId,
+          children: [],
+        },
+        parentNodeId
+      );
+      parentNodeId = currMsgId;
+    }
+    onChunk(parentNodeId);
+
+    await generateMessage(convId, parentNodeId, onChunk);
+  };
+
+  const saveConfig = (config: typeof CONFIG_DEFAULT) => {
+    StorageUtils.setConfig(config);
+    setConfig(config);
+  };
+
+  return (
+    <AppContext.Provider
+      value={{
+        isGenerating,
+        viewingChat,
+        pendingMessages,
+        sendMessage,
+        stopGenerating,
+        replaceMessageAndGenerate,
+        canvasData,
+        setCanvasData,
+        config,
+        saveConfig,
+        showSettings,
+        setShowSettings,
+      }}
+    >
+      {children}
+    </AppContext.Provider>
+  );
+};
+
+export const useAppContext = () => useContext(AppContext);

tools/server/webui/src/utils/common.tsx

@@ -0,0 +1,38 @@
+export const XCloseButton: React.ElementType<
+  React.ClassAttributes<HTMLButtonElement> &
+    React.HTMLAttributes<HTMLButtonElement>
+> = ({ className, ...props }) => (
+  <button className={`btn btn-square btn-sm ${className ?? ''}`} {...props}>
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      className="h-6 w-6"
+      fill="none"
+      viewBox="0 0 24 24"
+      stroke="currentColor"
+    >
+      <path
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        strokeWidth="2"
+        d="M6 18L18 6M6 6l12 12"
+      />
+    </svg>
+  </button>
+);
+
+export const OpenInNewTab = ({
+  href,
+  children,
+}: {
+  href: string;
+  children: string;
+}) => (
+  <a
+    className="underline"
+    href={href}
+    target="_blank"
+    rel="noopener noreferrer"
+  >
+    {children}
+  </a>
+);

tools/server/webui/src/utils/llama-vscode.ts

@@ -0,0 +1,60 @@
+import { useEffect, useState } from 'react';
+import { MessageExtraContext } from './types';
+import { ChatTextareaApi } from '../components/useChatTextarea.ts';
+
+// Extra context when using llama.cpp WebUI from llama-vscode, inside an iframe
+// Ref: https://github.com/ggml-org/llama.cpp/pull/11940
+
+interface SetTextEvData {
+  text: string;
+  context: string;
+}
+
+/**
+ * To test it:
+ * window.postMessage({ command: 'setText', text: 'Spot the syntax error', context: 'def test()\n  return 123' }, '*');
+ */
+
+export const useVSCodeContext = (textarea: ChatTextareaApi) => {
+  const [extraContext, setExtraContext] = useState<MessageExtraContext | null>(
+    null
+  );
+
+  // Accept setText message from a parent window and set inputMsg and extraContext
+  useEffect(() => {
+    const handleMessage = (event: MessageEvent) => {
+      if (event.data?.command === 'setText') {
+        const data: SetTextEvData = event.data;
+        textarea.setValue(data?.text);
+        if (data?.context && data.context.length > 0) {
+          setExtraContext({
+            type: 'context',
+            content: data.context,
+          });
+        }
+        textarea.focus();
+      }
+    };
+
+    window.addEventListener('message', handleMessage);
+    return () => window.removeEventListener('message', handleMessage);
+  }, [textarea]);
+
+  // Add a keydown listener that sends the "escapePressed" message to the parent window
+  useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (event.key === 'Escape') {
+        window.parent.postMessage({ command: 'escapePressed' }, '*');
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, []);
+
+  return {
+    extraContext,
+    // call once the user message is sent, to clear the extra context
+    clearExtraContext: () => setExtraContext(null),
+  };
+};

tools/server/webui/src/utils/misc.ts

@@ -0,0 +1,128 @@
+// @ts-expect-error this package does not have typing
+import TextLineStream from 'textlinestream';
+import { APIMessage, Message } from './types';
+
+// ponyfill for missing ReadableStream asyncIterator on Safari
+import { asyncIterator } from '@sec-ant/readable-stream/ponyfill/asyncIterator';
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const isString = (x: any) => !!x.toLowerCase;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const isBoolean = (x: any) => x === true || x === false;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const isNumeric = (n: any) => !isString(n) && !isNaN(n) && !isBoolean(n);
+export const escapeAttr = (str: string) =>
+  str.replace(/>/g, '>').replace(/"/g, '"');
+
+// wrapper for SSE
+export async function* getSSEStreamAsync(fetchResponse: Response) {
+  if (!fetchResponse.body) throw new Error('Response body is empty');
+  const lines: ReadableStream<string> = fetchResponse.body
+    .pipeThrough(new TextDecoderStream())
+    .pipeThrough(new TextLineStream());
+  // @ts-expect-error asyncIterator complains about type, but it should work
+  for await (const line of asyncIterator(lines)) {
+    //if (isDev) console.log({ line });
+    if (line.startsWith('data:') && !line.endsWith('[DONE]')) {
+      const data = JSON.parse(line.slice(5));
+      yield data;
+    } else if (line.startsWith('error:')) {
+      const data = JSON.parse(line.slice(6));
+      throw new Error(data.message || 'Unknown error');
+    }
+  }
+}
+
+// copy text to clipboard
+export const copyStr = (textToCopy: string) => {
+  // Navigator clipboard api needs a secure context (https)
+  if (navigator.clipboard && window.isSecureContext) {
+    navigator.clipboard.writeText(textToCopy);
+  } else {
+    // Use the 'out of viewport hidden text area' trick
+    const textArea = document.createElement('textarea');
+    textArea.value = textToCopy;
+    // Move textarea out of the viewport so it's not visible
+    textArea.style.position = 'absolute';
+    textArea.style.left = '-999999px';
+    document.body.prepend(textArea);
+    textArea.select();
+    document.execCommand('copy');
+  }
+};
+
+/**
+ * filter out redundant fields upon sending to API
+ * also format extra into text
+ */
+export function normalizeMsgsForAPI(messages: Readonly<Message[]>) {
+  return messages.map((msg) => {
+    let newContent = '';
+
+    for (const extra of msg.extra ?? []) {
+      if (extra.type === 'context') {
+        newContent += `${extra.content}\n\n`;
+      }
+    }
+
+    newContent += msg.content;
+
+    return {
+      role: msg.role,
+      content: newContent,
+    };
+  }) as APIMessage[];
+}
+
+/**
+ * recommended for DeepsSeek-R1, filter out content between <think> and </think> tags
+ */
+export function filterThoughtFromMsgs(messages: APIMessage[]) {
+  return messages.map((msg) => {
+    return {
+      role: msg.role,
+      content:
+        msg.role === 'assistant'
+          ? msg.content.split('</think>').at(-1)!.trim()
+          : msg.content,
+    } as APIMessage;
+  });
+}
+
+export function classNames(classes: Record<string, boolean>): string {
+  return Object.entries(classes)
+    .filter(([_, value]) => value)
+    .map(([key, _]) => key)
+    .join(' ');
+}
+
+export const delay = (ms: number) =>
+  new Promise((resolve) => setTimeout(resolve, ms));
+
+export const throttle = <T extends unknown[]>(
+  callback: (...args: T) => void,
+  delay: number
+) => {
+  let isWaiting = false;
+
+  return (...args: T) => {
+    if (isWaiting) {
+      return;
+    }
+
+    callback(...args);
+    isWaiting = true;
+
+    setTimeout(() => {
+      isWaiting = false;
+    }, delay);
+  };
+};
+
+export const cleanCurrentUrl = (removeQueryParams: string[]) => {
+  const url = new URL(window.location.href);
+  removeQueryParams.forEach((param) => {
+    url.searchParams.delete(param);
+  });
+  window.history.replaceState({}, '', url.toString());
+};

tools/server/webui/src/utils/storage.ts

@@ -0,0 +1,284 @@
+// coversations is stored in localStorage
+// format: { [convId]: { id: string, lastModified: number, messages: [...] } }
+
+import { CONFIG_DEFAULT } from '../Config';
+import { Conversation, Message, TimingReport } from './types';
+import Dexie, { Table } from 'dexie';
+
+const event = new EventTarget();
+
+type CallbackConversationChanged = (convId: string) => void;
+let onConversationChangedHandlers: [
+  CallbackConversationChanged,
+  EventListener,
+][] = [];
+const dispatchConversationChange = (convId: string) => {
+  event.dispatchEvent(
+    new CustomEvent('conversationChange', { detail: { convId } })
+  );
+};
+
+const db = new Dexie('LlamacppWebui') as Dexie & {
+  conversations: Table<Conversation>;
+  messages: Table<Message>;
+};
+
+// https://dexie.org/docs/Version/Version.stores()
+db.version(1).stores({
+  // Unlike SQL, you don’t need to specify all properties but only the one you wish to index.
+  conversations: '&id, lastModified',
+  messages: '&id, convId, [convId+id], timestamp',
+});
+
+// convId is a string prefixed with 'conv-'
+const StorageUtils = {
+  /**
+   * manage conversations
+   */
+  async getAllConversations(): Promise<Conversation[]> {
+    await migrationLStoIDB().catch(console.error); // noop if already migrated
+    return (await db.conversations.toArray()).sort(
+      (a, b) => b.lastModified - a.lastModified
+    );
+  },
+  /**
+   * can return null if convId does not exist
+   */
+  async getOneConversation(convId: string): Promise<Conversation | null> {
+    return (await db.conversations.where('id').equals(convId).first()) ?? null;
+  },
+  /**
+   * get all message nodes in a conversation
+   */
+  async getMessages(convId: string): Promise<Message[]> {
+    return await db.messages.where({ convId }).toArray();
+  },
+  /**
+   * use in conjunction with getMessages to filter messages by leafNodeId
+   * includeRoot: whether to include the root node in the result
+   * if node with leafNodeId does not exist, return the path with the latest timestamp
+   */
+  filterByLeafNodeId(
+    msgs: Readonly<Message[]>,
+    leafNodeId: Message['id'],
+    includeRoot: boolean
+  ): Readonly<Message[]> {
+    const res: Message[] = [];
+    const nodeMap = new Map<Message['id'], Message>();
+    for (const msg of msgs) {
+      nodeMap.set(msg.id, msg);
+    }
+    let startNode: Message | undefined = nodeMap.get(leafNodeId);
+    if (!startNode) {
+      // if not found, we return the path with the latest timestamp
+      let latestTime = -1;
+      for (const msg of msgs) {
+        if (msg.timestamp > latestTime) {
+          startNode = msg;
+          latestTime = msg.timestamp;
+        }
+      }
+    }
+    // traverse the path from leafNodeId to root
+    // startNode can never be undefined here
+    let currNode: Message | undefined = startNode;
+    while (currNode) {
+      if (currNode.type !== 'root' || (currNode.type === 'root' && includeRoot))
+        res.push(currNode);
+      currNode = nodeMap.get(currNode.parent ?? -1);
+    }
+    res.sort((a, b) => a.timestamp - b.timestamp);
+    return res;
+  },
+  /**
+   * create a new conversation with a default root node
+   */
+  async createConversation(name: string): Promise<Conversation> {
+    const now = Date.now();
+    const msgId = now;
+    const conv: Conversation = {
+      id: `conv-${now}`,
+      lastModified: now,
+      currNode: msgId,
+      name,
+    };
+    await db.conversations.add(conv);
+    // create a root node
+    await db.messages.add({
+      id: msgId,
+      convId: conv.id,
+      type: 'root',
+      timestamp: now,
+      role: 'system',
+      content: '',
+      parent: -1,
+      children: [],
+    });
+    return conv;
+  },
+  /**
+   * if convId does not exist, throw an error
+   */
+  async appendMsg(
+    msg: Exclude<Message, 'parent' | 'children'>,
+    parentNodeId: Message['id']
+  ): Promise<void> {
+    if (msg.content === null) return;
+    const { convId } = msg;
+    await db.transaction('rw', db.conversations, db.messages, async () => {
+      const conv = await StorageUtils.getOneConversation(convId);
+      const parentMsg = await db.messages
+        .where({ convId, id: parentNodeId })
+        .first();
+      // update the currNode of conversation
+      if (!conv) {
+        throw new Error(`Conversation ${convId} does not exist`);
+      }
+      if (!parentMsg) {
+        throw new Error(
+          `Parent message ID ${parentNodeId} does not exist in conversation ${convId}`
+        );
+      }
+      await db.conversations.update(convId, {
+        lastModified: Date.now(),
+        currNode: msg.id,
+      });
+      // update parent
+      await db.messages.update(parentNodeId, {
+        children: [...parentMsg.children, msg.id],
+      });
+      // create message
+      await db.messages.add({
+        ...msg,
+        parent: parentNodeId,
+        children: [],
+      });
+    });
+    dispatchConversationChange(convId);
+  },
+  /**
+   * remove conversation by id
+   */
+  async remove(convId: string): Promise<void> {
+    await db.transaction('rw', db.conversations, db.messages, async () => {
+      await db.conversations.delete(convId);
+      await db.messages.where({ convId }).delete();
+    });
+    dispatchConversationChange(convId);
+  },
+
+  // event listeners
+  onConversationChanged(callback: CallbackConversationChanged) {
+    const fn = (e: Event) => callback((e as CustomEvent).detail.convId);
+    onConversationChangedHandlers.push([callback, fn]);
+    event.addEventListener('conversationChange', fn);
+  },
+  offConversationChanged(callback: CallbackConversationChanged) {
+    const fn = onConversationChangedHandlers.find(([cb, _]) => cb === callback);
+    if (fn) {
+      event.removeEventListener('conversationChange', fn[1]);
+    }
+    onConversationChangedHandlers = [];
+  },
+
+  // manage config
+  getConfig(): typeof CONFIG_DEFAULT {
+    const savedVal = JSON.parse(localStorage.getItem('config') || '{}');
+    // to prevent breaking changes in the future, we always provide default value for missing keys
+    return {
+      ...CONFIG_DEFAULT,
+      ...savedVal,
+    };
+  },
+  setConfig(config: typeof CONFIG_DEFAULT) {
+    localStorage.setItem('config', JSON.stringify(config));
+  },
+  getTheme(): string {
+    return localStorage.getItem('theme') || 'auto';
+  },
+  setTheme(theme: string) {
+    if (theme === 'auto') {
+      localStorage.removeItem('theme');
+    } else {
+      localStorage.setItem('theme', theme);
+    }
+  },
+};
+
+export default StorageUtils;
+
+// Migration from localStorage to IndexedDB
+
+// these are old types, LS prefix stands for LocalStorage
+interface LSConversation {
+  id: string; // format: `conv-{timestamp}`
+  lastModified: number; // timestamp from Date.now()
+  messages: LSMessage[];
+}
+interface LSMessage {
+  id: number;
+  role: 'user' | 'assistant' | 'system';
+  content: string;
+  timings?: TimingReport;
+}
+async function migrationLStoIDB() {
+  if (localStorage.getItem('migratedToIDB')) return;
+  const res: LSConversation[] = [];
+  for (const key in localStorage) {
+    if (key.startsWith('conv-')) {
+      res.push(JSON.parse(localStorage.getItem(key) ?? '{}'));
+    }
+  }
+  if (res.length === 0) return;
+  await db.transaction('rw', db.conversations, db.messages, async () => {
+    let migratedCount = 0;
+    for (const conv of res) {
+      const { id: convId, lastModified, messages } = conv;
+      const firstMsg = messages[0];
+      const lastMsg = messages.at(-1);
+      if (messages.length < 2 || !firstMsg || !lastMsg) {
+        console.log(
+          `Skipping conversation ${convId} with ${messages.length} messages`
+        );
+        continue;
+      }
+      const name = firstMsg.content ?? '(no messages)';
+      await db.conversations.add({
+        id: convId,
+        lastModified,
+        currNode: lastMsg.id,
+        name,
+      });
+      const rootId = messages[0].id - 2;
+      await db.messages.add({
+        id: rootId,
+        convId: convId,
+        type: 'root',
+        timestamp: rootId,
+        role: 'system',
+        content: '',
+        parent: -1,
+        children: [firstMsg.id],
+      });
+      for (let i = 0; i < messages.length; i++) {
+        const msg = messages[i];
+        await db.messages.add({
+          ...msg,
+          type: 'text',
+          convId: convId,
+          timestamp: msg.id,
+          parent: i === 0 ? rootId : messages[i - 1].id,
+          children: i === messages.length - 1 ? [] : [messages[i + 1].id],
+        });
+      }
+      migratedCount++;
+      console.log(
+        `Migrated conversation ${convId} with ${messages.length} messages`
+      );
+    }
+    console.log(
+      `Migrated ${migratedCount} conversations from localStorage to IndexedDB`
+    );
+    localStorage.setItem('migratedToIDB', '1');
+  });
+}

tools/server/webui/src/utils/types.ts

@@ -0,0 +1,91 @@
+export interface TimingReport {
+  prompt_n: number;
+  prompt_ms: number;
+  predicted_n: number;
+  predicted_ms: number;
+}
+
+/**
+ * What is conversation "branching"? It is a feature that allows the user to edit an old message in the history, while still keeping the conversation flow.
+ * Inspired by ChatGPT / Claude / Hugging Chat where you edit a message, a new branch of the conversation is created, and the old message is still visible.
+ *
+ * We use the same node-based structure like other chat UIs, where each message has a parent and children. A "root" message is the first message in a conversation, which will not be displayed in the UI.
+ *
+ * root
+ *  ├── message 1
+ *  │      └── message 2
+ *  │             └── message 3
+ *  └── message 4
+ *        └── message 5
+ *
+ * In the above example, assuming that user wants to edit message 2, a new branch will be created:
+ *
+ *          ├── message 2
+ *          │   └── message 3
+ *          └── message 6
+ *
+ * Message 2 and 6 are siblings, and message 6 is the new branch.
+ *
+ * We only need to know the last node (aka leaf) to get the current branch. In the above example, message 5 is the leaf of branch containing message 4 and 5.
+ *
+ * For the implementation:
+ * - StorageUtils.getMessages() returns list of all nodes
+ * - StorageUtils.filterByLeafNodeId() filters the list of nodes from a given leaf node
+ */
+
+// Note: the term "message" and "node" are used interchangeably in this context
+export interface Message {
+  id: number;
+  convId: string;
+  type: 'text' | 'root';
+  timestamp: number; // timestamp from Date.now()
+  role: 'user' | 'assistant' | 'system';
+  content: string;
+  timings?: TimingReport;
+  extra?: MessageExtra[];
+  // node based system for branching
+  parent: Message['id'];
+  children: Message['id'][];
+}
+
+type MessageExtra = MessageExtraTextFile | MessageExtraContext; // TODO: will add more in the future
+
+export interface MessageExtraTextFile {
+  type: 'textFile';
+  name: string;
+  content: string;
+}
+
+export interface MessageExtraContext {
+  type: 'context';
+  content: string;
+}
+
+export type APIMessage = Pick<Message, 'role' | 'content'>;
+
+export interface Conversation {
+  id: string; // format: `conv-{timestamp}`
+  lastModified: number; // timestamp from Date.now()
+  currNode: Message['id']; // the current message node being viewed
+  name: string;
+}
+
+export interface ViewingChat {
+  conv: Readonly<Conversation>;
+  messages: Readonly<Message[]>;
+}
+
+export type PendingMessage = Omit<Message, 'content'> & {
+  content: string | null;
+};
+
+export enum CanvasType {
+  PY_INTERPRETER,
+}
+
+export interface CanvasPyInterpreter {
+  type: CanvasType.PY_INTERPRETER;
+  content: string;
+}
+
+export type CanvasData = CanvasPyInterpreter;

tools/server/webui/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />

tools/server/webui/tailwind.config.js

@@ -0,0 +1,16 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./index.html",
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [
+    require('daisyui'),
+  ],
+  daisyui: {
+    themes: ['light', 'dark', 'cupcake', 'bumblebee', 'emerald', 'corporate', 'synthwave', 'retro', 'cyberpunk', 'valentine', 'halloween', 'garden', 'forest', 'aqua', 'lofi', 'pastel', 'fantasy', 'wireframe', 'black', 'luxury', 'dracula', 'cmyk', 'autumn', 'business', 'acid', 'lemonade', 'night', 'coffee', 'winter', 'dim', 'nord', 'sunset'],
+  }
+}

tools/server/webui/tsconfig.app.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2021",
+    "useDefineForClassFields": true,
+    "lib": ["ES2021", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}

tools/server/webui/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}