Trajectory Platform

Import your data, convert them into Trajectories, and receive endpoints via the Trajectory Platform.

Currently supports Langsmith Integration (Braintrust coming soon).

All processing happens on your machine and your API key never leaves your environment.

Prerequisites

• Python 3.11+
• UV (Python package manager)
• Node.js (v18+)
• A LangSmith API key (lsv2_pt_...)

Quick Start

./run.sh

This single command handles everything:

1. Creates a Python virtual environment (via uv venv) if one doesn't exist
2. Installs backend dependencies
3. Installs frontend dependencies (if node_modules is missing)
4. Starts the FastAPI backend on http://localhost:8000
5. Starts the Vite dev server on http://localhost:5173

Open http://localhost:5173 in your browser, enter your LangSmith API key, and start browsing traces.

Press Ctrl+C to stop both servers.

Manual Setup

If you prefer to run things separately:

Backend

uv venv
uv pip install -r server/requirements.txt
uv run uvicorn server.main:app --reload

The API server will be available at http://localhost:8000.

Frontend

cd frontend
npm install
npm run dev

The frontend dev server will be available at http://localhost:5173. It proxies /api requests to the backend automatically.

Project Structure

.
├── server/                  # FastAPI backend
│   ├── main.py              # App setup, CORS, routes
│   ├── routers/             # API endpoint definitions
│   │   ├── projects.py      # Project listing & validation
│   │   └── threads.py       # Thread/conversation endpoints
│   ├── services/
│   │   └── langsmith.py     # LangSmith API interaction
│   └── models/
│       └── schemas.py       # Pydantic request/response models
├── frontend/                # React + TypeScript frontend
│   ├── src/
│   │   ├── components/      # UI components
│   │   ├── context/         # React context (auth state)
│   │   ├── api/             # API client
│   │   └── types/           # TypeScript type definitions
│   └── vite.config.ts       # Vite config with API proxy
├── run.sh                   # Development startup script
└── pyproject.toml           # Python project config

Available Scripts

License

Apache 2.0