---

name: Start Orchestrator description: Starts the Orchestrator 3 Stream application (backend + frontend) in background mode. Use when the user asks to start orchestrator, launch orchestrator, run orchestrator, or open the orchestrator UI. Supports --session and --cwd flags for backend.

Start Orchestrator

Launches the Orchestrator 3 Stream application with both backend (FastAPI) and frontend (Vue/Vite) servers.

Prerequisites

• The orchestrator application is located at apps/orchestrator_3_stream/
• Backend requires Python with uv (Astral UV)
• Frontend requires Node.js with npm
• PostgreSQL database should be running

Configuration

Default ports (configurable via .env):

• Backend: Port 8002 (default fallback: 9403)
• Frontend: Port 5175

Backend Flags

The backend script (start_be.sh) accepts:

Workflow

1. Start Backend (with optional flags)

Run in background by default:

Copy# Basic start (new session, current directory)
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh &

# With session ID (resume existing session)
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh --session <session-id> &

# With custom working directory
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh --cwd /path/to/project &

# With both flags
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh --cwd /path/to/project --session <session-id> &

2. Start Frontend

Run in background:

Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_fe.sh &

3. Open UI in Chrome

After both services are running, open the frontend URL:

Copyopen -a "Google Chrome" "http://127.0.0.1:5175"

Complete Example Commands

Start both in background (new session):

Copy# Start backend
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh &

# Wait for backend to initialize
sleep 3

# Start frontend
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_fe.sh &

# Wait for frontend to initialize
sleep 2

# Open in Chrome
open -a "Google Chrome" "http://127.0.0.1:5175"

Resume a session:

Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh --session abc123-def456 &
sleep 3
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_fe.sh &
sleep 2
open -a "Google Chrome" "http://127.0.0.1:5175"

Foreground Mode

If user requests foreground mode, do NOT use & suffix and run each command sequentially, starting frontend first in background then backend in foreground:

Copy# Frontend in background (so we can run backend in foreground)
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_fe.sh &

# Backend in foreground (to see logs)
cd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh --cwd /path/to/project

Stopping Services

To stop the services:

Copy# Find and kill backend
lsof -ti:8002 | xargs kill -9

# Find and kill frontend
lsof -ti:5175 | xargs kill -9

Troubleshooting

• Port in use: The scripts automatically kill processes using their ports before starting
• Database not running: Ensure PostgreSQL is running before starting backend
• Missing dependencies: Run uv sync in backend directory, npm install in frontend directory

Examples

Example 1: Basic Start

User request:

CopyStart the orchestrator

You would:

1. Start backend in background:

   Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh &
   

2. Wait 3 seconds for backend to initialize
3. Start frontend in background:

   Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_fe.sh &
   

4. Wait 2 seconds for frontend to initialize
5. Open Chrome:

   Copyopen -a "Google Chrome" "http://127.0.0.1:5175"
   

Example 2: Resume Session with Custom CWD

User request:

CopyStart orchestrator with session abc123 and working directory /Users/me/myproject

You would:

1. Start backend with flags:

   Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh --cwd /Users/me/myproject --session abc123 &
   

2. Wait, then start frontend and open Chrome as above

Example 3: Foreground Mode

User request:

CopyStart orchestrator in foreground so I can see logs

You would:

1. Start frontend in background first:

   Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_fe.sh &
   

2. Wait 2 seconds
3. Start backend in foreground (no &):

   Copycd /path/to/agent-experts/apps/orchestrator_3_stream && ./start_be.sh
   

4. Note: Chrome opening should happen after frontend is ready but before backend foreground command