commit 5a29468b7e965d7ca7e1ebc772ec7c6724799864
Author: andrey.bychkov <andrey@signalmodelling.ru>
Date:   Fri Jul 3 09:31:45 2026 +0300

    feat: initial commit - pipeline runner with real-time streaming

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..dcc8cab
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,55 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+*.egg
+*.egg-info/
+dist/
+build/
+*.whl
+
+# Virtual environments
+venv/
+.venv/
+env/
+.env/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# dotenv
+.env
+.env.*
+!env.example
+
+# Logs
+*.log
+logs/
+
+# Jupyter
+.ipynb_checkpoints/
+
+# Coverage
+htmlcov/
+.coverage
+.coverage.*
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pytest
+.pytest_cache/
+
+# Ruff
+.ruff_cache/
diff --git a/AGENTS.md b/AGENTS.md
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+++ b/AGENTS.md
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+# AGENTS.md
+
+## Repo layout
+- `pipeline-runner/` — single Python package (FastAPI + uvicorn). All code lives here.
+- `pipeline-runner/app.py` — FastAPI app entrypoint with REST API + WebSocket + static file serving.
+- `pipeline-runner/main.py` — uvicorn dev server launcher (`python main.py`).
+- `pipeline-runner/static/index.html` — frontend UI.
+- `pipeline-runner/storage/pipelines/` — JSON files for persisted pipelines.
+- `pipeline-runner/storage/logs/` — execution logs (one file per run).
+
+## Dev commands
+- Install deps: `cd pipeline-runner && pip install -r requirements.txt`
+- Start dev server: `cd pipeline-runner && python main.py` (uvicorn with reload, port 8000)
+- Deploy with auto-reload: `cd pipeline-runner && ./deploy.sh` (activates venv, installs deps, starts uvicorn with `--reload`)
+- Run tests: `cd pipeline-runner && python -m pytest`
+  - Tests use `httpx`-backed `TestClient` from FastAPI.
+  - Tests that exercise pipeline execution (`TestExecutePipeline`) monkeypatch `asyncio.create_subprocess_exec` to avoid calling `opencode` — they do not require `opencode` to be installed.
+  - The `clean_storage` fixture auto-removes `storage/pipelines/` and `storage/logs/` before/after each test.
+
+## Key behaviors
+- Pipeline execution runs `opencode run <prompt> --title <title>` per step via `asyncio.create_subprocess_exec`.
+- Pipeline stops on first step error (non-zero return code).
+- Real-time logs are streamed over WebSocket at `/ws/{run_id}`.
+- CORS is open (`allow_origins=["*"]`) for dev convenience.
+- No lint, typecheck, or formatter tooling is configured.
+
diff --git a/pipeline-runner/README.md b/pipeline-runner/README.md
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+++ b/pipeline-runner/README.md
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+# Pipeline Runner
+
+Веб-интерфейс для создания и выполнения pipeline промптов через `opencode run`.
+
+## Установка
+
+```bash
+cd pipeline-runner
+pip install -r requirements.txt
+```
+
+## Запуск
+
+```bash
+python main.py
+```
+
+Откройте http://localhost:8000 в браузере.
+
+### Авто-релоад
+
+```bash
+./deploy.sh
+```
+
+Скрипт активирует виртуальное окружение, установит зависимости и запустит uvicorn с авто-релоадом — сервер перезапустится автоматически после изменений в коде.
+
+## Функционал
+
+1. **Создание Pipeline**:
+   - Добавьте промпты с текстом и заголовком
+   - Сохраните pipeline с именем
+
+2. **Запуск**:
+   - Выберите сохраненный pipeline
+   - Нажмите "Run Pipeline"
+   - Следите за выполнением в реальном времени через WebSocket
+
+3. **Результаты**:
+   - Каждый шаг отображается в отдельной панели
+   - Статусы: pending, running, completed, error
+   - Логи сохраняются в `storage/logs/` (один файл на запуск)
+
+## Структура
+
+- `/api/pipelines` - REST API для управления pipeline
+- `/ws/{run_id}` - WebSocket для real-time логов
+- `storage/pipelines/` - JSON файлы сохраненных pipeline
+- `storage/logs/` - Логи выполнений
diff --git a/pipeline-runner/app.py b/pipeline-runner/app.py
new file mode 100644
index 0000000..28ad531
--- /dev/null
+++ b/pipeline-runner/app.py
@@ -0,0 +1,226 @@
+import asyncio
+import json
+import uuid
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Optional
+
+from fastapi import FastAPI, WebSocket, WebSocketDisconnect, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from pydantic import BaseModel
+
+app = FastAPI(title="Pipeline Runner")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+BASE_DIR = Path(__file__).parent
+PIPELINES_DIR = BASE_DIR / "storage" / "pipelines"
+LOGS_DIR = BASE_DIR / "storage" / "logs"
+
+PIPELINES_DIR.mkdir(parents=True, exist_ok=True)
+LOGS_DIR.mkdir(parents=True, exist_ok=True)
+
+active_connections: dict[str, set[WebSocket]] = {}
+active_runs: dict[str, asyncio.Task] = {}
+
+
+class Prompt(BaseModel):
+    id: str
+    text: str
+    title: str
+    order: int
+
+
+class Pipeline(BaseModel):
+    id: str
+    name: str
+    prompts: list[Prompt]
+    created_at: str
+    updated_at: str
+
+
+def load_pipelines() -> list[Pipeline]:
+    pipelines = []
+    for f in PIPELINES_DIR.glob("*.json"):
+        try:
+            with open(f) as file:
+                data = json.load(file)
+                pipelines.append(Pipeline(**data))
+        except (json.JSONDecodeError, OSError):
+            continue
+    return sorted(pipelines, key=lambda x: x.updated_at, reverse=True)
+
+
+def save_pipeline(pipeline: Pipeline):
+    pipeline.updated_at = datetime.now(timezone.utc).isoformat()
+    try:
+        with open(PIPELINES_DIR / f"{pipeline.id}.json", "w") as f:
+            json.dump(pipeline.model_dump(), f, indent=2)
+    except OSError as e:
+        raise HTTPException(status_code=500, detail=f"Failed to save pipeline: {e}")
+
+
+def delete_pipeline(pipeline_id: str):
+    path = PIPELINES_DIR / f"{pipeline_id}.json"
+    if path.exists():
+        try:
+            path.unlink()
+        except OSError as e:
+            raise HTTPException(status_code=500, detail=f"Failed to delete pipeline: {e}")
+
+
+@app.get("/api/pipelines", response_model=list[Pipeline])
+async def list_pipelines():
+    return load_pipelines()
+
+
+@app.post("/api/pipelines", response_model=Pipeline)
+async def create_pipeline(pipeline: Pipeline):
+    existing = load_pipelines()
+    if any(p.id == pipeline.id for p in existing):
+        raise HTTPException(status_code=409, detail="Pipeline already exists")
+    save_pipeline(pipeline)
+    return pipeline
+
+
+@app.delete("/api/pipelines/{pipeline_id}")
+async def delete(pipeline_id: str):
+    pipelines = load_pipelines()
+    if not any(p.id == pipeline_id for p in pipelines):
+        raise HTTPException(status_code=404, detail="Pipeline not found")
+    delete_pipeline(pipeline_id)
+    return {"deleted": pipeline_id}
+
+
+@app.post("/api/pipelines/{pipeline_id}/execute")
+async def execute_pipeline(pipeline_id: str):
+    pipelines = load_pipelines()
+    pipeline = next((p for p in pipelines if p.id == pipeline_id), None)
+    if not pipeline:
+        raise HTTPException(status_code=404, detail="Pipeline not found")
+
+    run_id = str(uuid.uuid4())
+    log_file = LOGS_DIR / f"{run_id}.log"
+
+    active_connections[run_id] = set()
+    task = asyncio.create_task(run_pipeline_task(pipeline, run_id, log_file))
+    active_runs[run_id] = task
+
+    return {"run_id": run_id, "log_file": str(log_file)}
+
+
+async def run_pipeline_task(pipeline: Pipeline, run_id: str, log_file: Path):
+    async def write_log(line: str):
+        with open(log_file, "a") as f:
+            f.write(f"[{datetime.now(timezone.utc).isoformat()}] {line}\n")
+        for ws in list(active_connections.get(run_id, set())):
+            try:
+                await ws.send_json({"type": "log", "data": line})
+            except:
+                pass
+
+    async def stream_reader(stream, prefix, output_collector):
+        while True:
+            line = await stream.readline()
+            if not line:
+                break
+            text = line.decode("utf-8", errors="replace").rstrip("\n")
+            if text:
+                output_collector.append(text)
+                await write_log(f"{prefix} {text}")
+
+    await write_log(f"Starting pipeline: {pipeline.name} (run_id: {run_id})")
+
+    try:
+        for i, prompt in enumerate(pipeline.prompts, 1):
+            await write_log(f"[Step {i}/{len(pipeline.prompts)}] Starting: {prompt.title}")
+            await write_log(f"[Step {i}/{len(pipeline.prompts)}] Prompt: {prompt.text}")
+
+            for ws in list(active_connections.get(run_id, set())):
+                try:
+                    await ws.send_json({
+                        "type": "status",
+                        "step_index": i - 1,
+                        "status": "running",
+                        "title": prompt.title
+                    })
+                except:
+                    pass
+
+            cmd = ["opencode", "run", prompt.text, "--title", prompt.title]
+            process = await asyncio.create_subprocess_exec(
+                *cmd,
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE
+            )
+
+            stdout_lines: list[str] = []
+            stderr_lines: list[str] = []
+
+            await asyncio.gather(
+                stream_reader(process.stdout, f"[Step {i}/{len(pipeline.prompts)}]", stdout_lines),
+                stream_reader(process.stderr, f"[Step {i}/{len(pipeline.prompts)}]", stderr_lines)
+            )
+
+            await process.wait()
+
+            output = "\n".join(stdout_lines)
+            error = "\n".join(stderr_lines)
+
+            status = "completed" if process.returncode == 0 else "error"
+            result = {"returncode": process.returncode, "output": output, "error": error}
+
+            await write_log(f"[Step {i}/{len(pipeline.prompts)}] {status.upper()} (returncode: {process.returncode})")
+
+            for ws in list(active_connections.get(run_id, set())):
+                try:
+                    await ws.send_json({
+                        "type": "status",
+                        "step_index": i - 1,
+                        "status": status,
+                        "title": prompt.title,
+                        "result": result
+                    })
+                except:
+                    pass
+
+            if process.returncode != 0:
+                await write_log(f"Pipeline failed at step {i}")
+                break
+
+        await write_log("Pipeline finished")
+
+    finally:
+        if run_id in active_runs:
+            del active_runs[run_id]
+
+
+@app.websocket("/ws/{run_id}")
+async def websocket_endpoint(websocket: WebSocket, run_id: str):
+    await websocket.accept()
+    if run_id not in active_connections:
+        active_connections[run_id] = set()
+    active_connections[run_id].add(websocket)
+
+    try:
+        while True:
+            await websocket.receive_text()
+    except Exception:
+        active_connections[run_id].discard(websocket)
+        if not active_connections[run_id]:
+            del active_connections[run_id]
+
+
+if (BASE_DIR / "static").exists():
+    app.mount("/static", StaticFiles(directory="static"), name="static")
+
+@app.get("/")
+async def root():
+    return {"message": "Pipeline Runner API", "ws_endpoint": "/ws/{run_id}"}
diff --git a/pipeline-runner/deploy.sh b/pipeline-runner/deploy.sh
new file mode 100755
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+++ b/pipeline-runner/deploy.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"
+
+# Activate virtual environment
+source .venv/bin/activate
+
+# Install dependencies
+pip install -q -r requirements.txt
+
+# Start uvicorn with auto-reload
+uvicorn app:app --host 0.0.0.0 --port 8000 --reload
\ No newline at end of file
diff --git a/pipeline-runner/main.py b/pipeline-runner/main.py
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index 0000000..5f330aa
--- /dev/null
+++ b/pipeline-runner/main.py
@@ -0,0 +1,4 @@
+import uvicorn
+
+if __name__ == "__main__":
+    uvicorn.run("app:app", host="0.0.0.0", port=8000, reload=True)
diff --git a/pipeline-runner/requirements.txt b/pipeline-runner/requirements.txt
new file mode 100644
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--- /dev/null
+++ b/pipeline-runner/requirements.txt
@@ -0,0 +1,7 @@
+fastapi>=0.115.0
+uvicorn[standard]>=0.34.0
+websockets>=14.0
+
+# Testing
+pytest>=8.0
+httpx2>=0.28.0
diff --git a/pipeline-runner/static/index.html b/pipeline-runner/static/index.html
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--- /dev/null
+++ b/pipeline-runner/static/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Pipeline Runner</title>
+    <script src="https://cdn.jsdelivr.net/npm/alpinejs@3.13.3/dist/cdn.min.js" defer></script>
+    <style>
+        * { box-sizing: border-box; margin: 0; padding: 0; }
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            background: #1a1a2e; color: #eaeaea; padding: 20px; line-height: 1.6;
+        }
+        .container { max-width: 1200px; margin: 0 auto; }
+        h1 { margin-bottom: 20px; color: #00d9ff; }
+        h2 { margin: 20px 0 10px; color: #00ff88; font-size: 1.2em; }
+        .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
+        .panel {
+            background: #16213e; border-radius: 8px; padding: 20px;
+            border: 1px solid #0f3460;
+        }
+        .full-width { grid-column: 1 / -1; }
+        input, button {
+            padding: 10px 15px; border-radius: 6px; border: 1px solid #0f3460;
+            background: #0f3460; color: white; font-size: 14px;
+        }
+        input:focus { outline: none; border-color: #00d9ff; }
+        button {
+            cursor: pointer; transition: all 0.2s; font-weight: 600;
+        }
+        button:hover { transform: translateY(-1px); }
+        .btn-primary { background: #00d9ff; color: #1a1a2e; border: none; }
+        .btn-primary:hover { background: #00b8d9; }
+        .btn-danger { background: #ff4757; color: white; border: none; }
+        .btn-danger:hover { background: #ff3333; }
+        .btn-success { background: #00ff88; color: #1a1a2e; border: none; }
+        .btn-success:hover { background: #00cc6a; }
+        .btn-secondary { background: #0f3460; border: 1px solid #00d9ff; }
+        .form-group { margin-bottom: 15px; }
+        .form-group label { display: block; margin-bottom: 5px; color: #00d9ff; font-size: 0.9em; }
+        .form-group input { width: 100%; }
+        .pipeline-list { list-style: none; }
+        .pipeline-item {
+            background: #0f3460; padding: 12px 15px; margin: 8px 0;
+            border-radius: 6px; display: flex; justify-content: space-between;
+            align-items: center; cursor: pointer; transition: all 0.2s;
+        }
+        .pipeline-item:hover { background: #1a4a7a; }
+        .pipeline-item.selected { border: 2px solid #00d9ff; }
+        .prompt-list { list-style: none; margin: 10px 0; }
+        .prompt-item {
+            background: #0f3460; padding: 12px; margin: 6px 0;
+            border-radius: 6px; display: flex; gap: 10px; align-items: flex-start;
+        }
+        .prompt-item .order { color: #00d9ff; font-weight: bold; min-width: 25px; }
+        .prompt-item .content { flex: 1; }
+        .prompt-item .title { color: #00ff88; font-weight: 600; margin-bottom: 4px; }
+        .prompt-item .text { color: #ccc; font-size: 0.9em; word-break: break-word; }
+        .prompt-item .actions {
+            display: flex; gap: 5px; margin-left: 10px;
+        }
+        .prompt-item .actions button {
+            padding: 5px 10px; font-size: 12px;
+        }
+        .status-badge {
+            padding: 3px 8px; border-radius: 12px; font-size: 11px; font-weight: 600;
+            text-transform: uppercase;
+        }
+        .status-pending { background: #555; color: white; }
+        .status-running { background: #00d9ff; color: #1a1a2e; }
+        .status-completed { background: #00ff88; color: #1a1a2e; }
+        .status-error { background: #ff4757; color: white; }
+        .results-grid {
+            display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 15px;
+            margin-top: 15px;
+        }
+        .result-card {
+            background: #0f3460; border-radius: 8px; overflow: hidden;
+            border: 1px solid #16213e;
+        }
+        .result-header {
+            padding: 10px 15px; background: #16213e; display: flex;
+            justify-content: space-between; align-items: center; cursor: pointer;
+        }
+        .result-header:hover { background: #1a2744; }
+        .result-title { font-weight: 600; color: #00d9ff; }
+        .result-body {
+            padding: 15px; max-height: 300px; overflow-y: auto;
+            font-family: 'Monaco', 'Menlo', monospace; font-size: 12px;
+            white-space: pre-wrap; word-break: break-word;
+        }
+        .result-body .log-line { margin: 2px 0; }
+        .result-body .log-line.error { color: #ff4757; }
+        .result-body .log-line.info { color: #00d9ff; }
+        .result-body .log-line.success { color: #00ff88; }
+        .result-body .log-line.default { color: #ccc; }
+        .empty-state {
+            text-align: center; padding: 40px; color: #666;
+        }
+        .run-info {
+            background: #0f3460; padding: 10px 15px; border-radius: 6px;
+            margin-bottom: 15px; font-size: 0.9em;
+        }
+        .run-info span { color: #00d9ff; }
+        .close-btn { background: none; border: none; color: #ff4757; cursor: pointer; font-size: 18px; padding: 0; }
+    </style>
+</head>
+<body>
+    <div x-data="app()" class="container">
+        <h1>🚀 Pipeline Runner</h1>
+
+        <div class="grid">
+            <!-- Left Column: Pipeline Management -->
+            <div>
+                <div class="panel">
+                    <h2>Create/Load Pipeline</h2>
+                    
+                    <div class="form-group">
+                        <label>Pipeline Name</label>
+                        <input type="text" x-model="newPipelineName" placeholder="My Pipeline">
+                    </div>
+
+                    <div class="form-group" style="display: flex; gap: 10px;">
+                        <input type="text" x-model="newPromptText" placeholder="Enter prompt text..." style="flex: 1;">
+                        <input type="text" x-model="newPromptTitle" placeholder="Title" style="flex: 0.5;">
+                    </div>
+                    <button @click="addPrompt" class="btn-secondary" style="width: 100%; margin-bottom: 15px;">
+                        + Add Prompt
+                    </button>
+
+                    <ul class="prompt-list">
+                        <template x-for="(prompt, index) in prompts" :key="prompt.id">
+                            <li class="prompt-item">
+                                <span class="order" x-text="index + 1"></span>
+                                <div class="content">
+                                    <div class="title" x-text="prompt.title"></div>
+                                    <div class="text" x-text="prompt.text"></div>
+                                </div>
+                                <div class="actions">
+                                    <button @click="removePrompt(index)" class="btn-danger">×</button>
+                                </div>
+                            </li>
+                        </template>
+                        <li x-show="prompts.length === 0" class="empty-state" style="padding: 20px;">
+                            No prompts added yet
+                        </li>
+                    </ul>
+
+                    <div style="display: flex; gap: 10px; margin-top: 15px;">
+                        <button @click="savePipeline" class="btn-primary" style="flex: 1;">
+                            💾 Save Pipeline
+                        </button>
+                        <button @click="clearPrompts" class="btn-secondary" style="flex: 1;">
+                            🗑️ Clear
+                        </button>
+                    </div>
+                </div>
+
+                <div class="panel" style="margin-top: 20px;">
+                    <h2>Saved Pipelines</h2>
+                    <ul class="pipeline-list">
+                        <template x-for="pipeline in pipelines" :key="pipeline.id">
+                            <li class="pipeline-item" 
+                                :class="{ selected: selectedPipeline?.id === pipeline.id }"
+                                @click="loadPipeline(pipeline)">
+                                <div>
+                                    <strong x-text="pipeline.name"></strong>
+                                    <div style="font-size: 0.85em; color: #888; margin-top: 3px;">
+                                        <span x-text="pipeline.prompts.length"></span> prompts
+                                    </div>
+                                </div>
+                                <button @click.stop="deletePipeline(pipeline.id)" class="btn-danger" style="padding: 5px 10px;">
+                                    Delete
+                                </button>
+                            </li>
+                        </template>
+                        <li x-show="pipelines.length === 0" class="empty-state" style="padding: 20px;">
+                            No saved pipelines
+                        </li>
+                    </ul>
+                </div>
+            </div>
+
+            <!-- Right Column: Execution -->
+            <div>
+                <div class="panel">
+                    <h2>Execution</h2>
+                    
+                    <div x-show="!currentRun" class="full-width">
+                        <div class="run-info">
+                            Selected: <span x-text="selectedPipeline?.name || 'None'">None</span>
+                        </div>
+                        <button @click="runPipeline" 
+                                class="btn-success" 
+                                style="width: 100%; padding: 15px; font-size: 16px;"
+                                :disabled="!selectedPipeline">
+                            ▶️ Run Pipeline
+                        </button>
+                    </div>
+
+                    <div x-show="currentRun" class="full-width">
+                        <div class="run-info">
+                            Run ID: <span x-text="currentRun.run_id"></span> | 
+                            Status: <span x-text="runStatus"></span>
+                        </div>
+                        <button @click="stopRun" class="btn-danger" style="width: 100%;">
+                            ⏹️ Stop & Close
+                        </button>
+
+                        <div class="results-grid">
+                            <template x-for="(step, index) in steps" :key="index">
+                                <div class="result-card">
+                                    <div class="result-header" @click="step.expanded = !step.expanded">
+                                        <span class="result-title" x-text="step.title || 'Step ' + (index + 1)"></span>
+                                        <span class="status-badge" 
+                                              :class="'status-' + (step.status || 'pending')"
+                                              x-text="step.status || 'pending'">
+                                        </span>
+                                    </div>
+                                    <div class="result-body" x-show="step.expanded">
+                                        <template x-for="line in step.logs" :key="line.id">
+                                            <div class="log-line" :class="line.type" x-text="line.text"></div>
+                                        </template>
+                                        <div x-show="step.logs.length === 0" style="color: #666; font-style: italic;">
+                                            No output yet...
+                                        </div>
+                                    </div>
+                                </div>
+                            </template>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <script>
+        function app() {
+            return {
+                newPipelineName: '',
+                newPromptText: '',
+                newPromptTitle: '',
+                prompts: [],
+                pipelines: [],
+                selectedPipeline: null,
+                currentRun: null,
+                steps: [],
+                ws: null,
+
+                init() {
+                    this.loadPipelines();
+                    this.$watch('prompts', () => {
+                        this.prompts = this.prompts.map((p, i) => ({
+                            ...p,
+                            order: i
+                        }));
+                    });
+                },
+
+                async loadPipelines() {
+                    const res = await fetch('/api/pipelines');
+                    this.pipelines = await res.json();
+                },
+
+                addPrompt() {
+                    if (!this.newPromptText.trim() || !this.newPromptTitle.trim()) return;
+                    this.prompts.push({
+                        id: crypto.randomUUID(),
+                        text: this.newPromptText,
+                        title: this.newPromptTitle,
+                        order: this.prompts.length
+                    });
+                    this.newPromptText = '';
+                    this.newPromptTitle = '';
+                },
+
+                removePrompt(index) {
+                    this.prompts.splice(index, 1);
+                },
+
+                clearPrompts() {
+                    this.prompts = [];
+                    this.newPipelineName = '';
+                },
+
+                async savePipeline() {
+                    if (!this.newPipelineName.trim()) {
+                        alert('Enter pipeline name');
+                        return;
+                    }
+                    if (this.prompts.length === 0) {
+                        alert('Add at least one prompt');
+                        return;
+                    }
+
+                    const pipeline = {
+                        id: crypto.randomUUID(),
+                        name: this.newPipelineName,
+                        prompts: this.prompts,
+                        created_at: new Date().toISOString(),
+                        updated_at: new Date().toISOString()
+                    };
+
+                    await fetch('/api/pipelines', {
+                        method: 'POST',
+                        headers: { 'Content-Type': 'application/json' },
+                        body: JSON.stringify(pipeline)
+                    });
+
+                    this.loadPipelines();
+                    this.clearPrompts();
+                },
+
+                async deletePipeline(id) {
+                    if (!confirm('Delete this pipeline?')) return;
+                    await fetch(`/api/pipelines/${id}`, { method: 'DELETE' });
+                    this.loadPipelines();
+                    if (this.selectedPipeline?.id === id) {
+                        this.selectedPipeline = null;
+                    }
+                },
+
+                loadPipeline(pipeline) {
+                    this.selectedPipeline = pipeline;
+                    this.prompts = [...pipeline.prompts];
+                },
+
+                async runPipeline() {
+                    if (!this.selectedPipeline) return;
+
+                    const res = await fetch(`/api/pipelines/${this.selectedPipeline.id}/execute`, {
+                        method: 'POST'
+                    });
+                    const data = await res.json();
+                    
+                    this.currentRun = data;
+                    this.steps = Array(this.selectedPipeline.prompts.length).fill(null).map((_, i) => ({
+                        title: this.selectedPipeline.prompts[i].title,
+                        status: 'pending',
+                        logs: [],
+                        expanded: true
+                    }));
+
+                    this.connectWebSocket(data.run_id);
+                },
+
+                connectWebSocket(runId) {
+                    const wsUrl = `ws://${location.host}/ws/${runId}`;
+                    this.ws = new WebSocket(wsUrl);
+
+                    this.ws.onmessage = (event) => {
+                        const msg = JSON.parse(event.data);
+                        if (msg.type === 'status') {
+                            if (msg.step_index < this.steps.length) {
+                                this.steps[msg.step_index] = {
+                                    ...this.steps[msg.step_index],
+                                    status: msg.status,
+                                    result: msg.result
+                                };
+                                if (msg.result?.output) {
+                                    this.steps[msg.step_index].logs = [
+                                        ...this.steps[msg.step_index].logs,
+                                        ...this.parseOutput(msg.result.output)
+                                    ];
+                                }
+                                if (msg.result?.error) {
+                                    this.steps[msg.step_index].logs = [
+                                        ...this.steps[msg.step_index].logs,
+                                        ...this.parseOutput(msg.result.error, 'error')
+                                    ];
+                                }
+                            }
+                        } else if (msg.type === 'log') {
+                            const lines = msg.data.split('\n').filter(l => l.trim());
+                            lines.forEach(line => {
+                                const stepMatch = line.match(/\[Step (\d+)\/\d+\]/);
+                                const stepIndex = stepMatch ? parseInt(stepMatch[1]) - 1 : -1;
+                                
+                                if (stepIndex >= 0 && stepIndex < this.steps.length) {
+                                    this.steps[stepIndex].logs.push({
+                                        id: crypto.randomUUID(),
+                                        text: line,
+                                        type: this.getLogType(line)
+                                    });
+                                }
+                            });
+                        }
+                    };
+
+                    this.ws.onclose = () => {
+                        console.log('WebSocket closed');
+                    };
+                },
+
+                parseOutput(text, type = 'default') {
+                    return text.split('\n').filter(l => l.trim()).map(line => ({
+                        id: crypto.randomUUID(),
+                        text: line,
+                        type: type
+                    }));
+                },
+
+                getLogType(line) {
+                    if (line.includes('Error:') || line.includes('error')) return 'error';
+                    if (line.includes('Starting') || line.includes('Output:')) return 'info';
+                    if (line.includes('completed') || line.includes('finished')) return 'success';
+                    return 'default';
+                },
+
+                get runStatus() {
+                    const statuses = this.steps.map(s => s.status).filter(Boolean);
+                    if (statuses.includes('running')) return 'Running...';
+                    if (statuses.includes('error')) return 'Failed';
+                    if (statuses.length === this.steps.length && statuses.every(s => s === 'completed')) {
+                        return 'Completed';
+                    }
+                    return 'In Progress';
+                },
+
+                stopRun() {
+                    if (this.ws) {
+                        this.ws.close();
+                        this.ws = null;
+                    }
+                    this.currentRun = null;
+                    this.steps = [];
+                }
+            };
+        }
+    </script>
+</body>
+</html>
diff --git a/pipeline-runner/tests/test_app.py b/pipeline-runner/tests/test_app.py
new file mode 100644
index 0000000..127a6b7
--- /dev/null
+++ b/pipeline-runner/tests/test_app.py
@@ -0,0 +1,189 @@
+import json
+import shutil
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+
+from app import app, PIPELINES_DIR, LOGS_DIR
+
+BASE_DIR = Path(__file__).parent.parent
+
+@pytest.fixture(autouse=True)
+def clean_storage():
+    """Clean storage before and after each test."""
+    if PIPELINES_DIR.exists():
+        shutil.rmtree(PIPELINES_DIR)
+    if LOGS_DIR.exists():
+        shutil.rmtree(LOGS_DIR)
+    PIPELINES_DIR.mkdir(parents=True, exist_ok=True)
+    LOGS_DIR.mkdir(parents=True, exist_ok=True)
+    yield
+    if PIPELINES_DIR.exists():
+        shutil.rmtree(PIPELINES_DIR)
+    if LOGS_DIR.exists():
+        shutil.rmtree(LOGS_DIR)
+
+def make_pipeline(name="test", prompt_count=1):
+    return {
+        "id": "test-pipeline-id",
+        "name": name,
+        "prompts": [
+            {
+                "id": f"prompt-{i}",
+                "text": f"test prompt {i}",
+                "title": f"Test Prompt {i}",
+                "order": i
+            }
+            for i in range(prompt_count)
+        ],
+        "created_at": "2024-01-01T00:00:00+00:00",
+        "updated_at": "2024-01-01T00:00:00+00:00"
+    }
+
+@pytest.fixture
+def client():
+    return TestClient(app)
+
+class TestListPipelines:
+    def test_empty(self, client):
+        resp = client.get("/api/pipelines")
+        assert resp.status_code == 200
+        assert resp.json() == []
+
+    def test_with_pipelines(self, client):
+        p = make_pipeline()
+        client.post("/api/pipelines", json=p)
+        resp = client.get("/api/pipelines")
+        assert resp.status_code == 200
+        data = resp.json()
+        assert len(data) == 1
+        assert data[0]["name"] == "test"
+
+class TestCreatePipeline:
+    def test_create(self, client):
+        p = make_pipeline()
+        resp = client.post("/api/pipelines", json=p)
+        assert resp.status_code == 200
+        data = resp.json()
+        assert data["name"] == "test"
+        assert data["id"] == "test-pipeline-id"
+
+    def test_duplicate_id(self, client):
+        p = make_pipeline()
+        client.post("/api/pipelines", json=p)
+        resp = client.post("/api/pipelines", json=p)
+        assert resp.status_code == 409
+
+class TestDeletePipeline:
+    def test_delete(self, client):
+        p = make_pipeline()
+        client.post("/api/pipelines", json=p)
+        resp = client.delete("/api/pipelines/test-pipeline-id")
+        assert resp.status_code == 200
+        assert resp.json()["deleted"] == "test-pipeline-id"
+
+    def test_delete_not_found(self, client):
+        resp = client.delete("/api/pipelines/nonexistent")
+        assert resp.status_code == 404
+
+class TestExecutePipeline:
+    def test_not_found(self, client):
+        resp = client.post("/api/pipelines/nonexistent/execute")
+        assert resp.status_code == 404
+
+    def test_execute(self, client, monkeypatch):
+        """Test pipeline execution by patching opencode with echo."""
+        import asyncio
+
+        class FakeStream:
+            async def readline(self):
+                return b""
+
+        class FakeProcess:
+            returncode = 0
+
+            async def wait(self):
+                return 0
+
+        async def fake_create_subprocess_exec(*args, **kwargs):
+            proc = FakeProcess()
+            proc.stdout = FakeStream()
+            proc.stderr = FakeStream()
+            return proc
+
+        monkeypatch.setattr(asyncio, "create_subprocess_exec", fake_create_subprocess_exec)
+
+        p = make_pipeline()
+        client.post("/api/pipelines", json=p)
+
+        resp = client.post("/api/pipelines/test-pipeline-id/execute")
+        assert resp.status_code == 200
+        data = resp.json()
+        assert "run_id" in data
+        assert "log_file" in data
+
+    def test_log_file_created(self, client, monkeypatch):
+        """Test that log file is created after execution."""
+        import asyncio
+
+        class FakeStream:
+            async def readline(self):
+                return b""
+
+        class FakeProcess:
+            returncode = 0
+
+            async def wait(self):
+                return 0
+
+        async def fake_create_subprocess_exec(*args, **kwargs):
+            proc = FakeProcess()
+            proc.stdout = FakeStream()
+            proc.stderr = FakeStream()
+            return proc
+
+        monkeypatch.setattr(asyncio, "create_subprocess_exec", fake_create_subprocess_exec)
+
+        p = make_pipeline()
+        client.post("/api/pipelines", json=p)
+
+        resp = client.post("/api/pipelines/test-pipeline-id/execute")
+        data = resp.json()
+        log_path = Path(data["log_file"])
+        assert log_path.exists()
+        content = log_path.read_text()
+        assert "Starting pipeline" in content
+        assert "Pipeline finished" in content
+
+    def test_error_step_stops_pipeline(self, client, monkeypatch):
+        """Test that pipeline stops on first error."""
+        import asyncio
+
+        class FakeStream:
+            async def readline(self):
+                return b""
+
+        class FakeProcess:
+            returncode = 1
+
+            async def wait(self):
+                return 1
+
+        async def fake_create_subprocess_exec(*args, **kwargs):
+            proc = FakeProcess()
+            proc.stdout = FakeStream()
+            proc.stderr = FakeStream()
+            return proc
+
+        monkeypatch.setattr(asyncio, "create_subprocess_exec", fake_create_subprocess_exec)
+
+        p = make_pipeline(prompt_count=3)
+        client.post("/api/pipelines", json=p)
+
+        resp = client.post("/api/pipelines/test-pipeline-id/execute")
+        data = resp.json()
+        log_path = Path(data["log_file"])
+        content = log_path.read_text()
+        assert "Pipeline failed at step 1" in content
+        assert "Step 2" not in content