For additional context about technologies to be used, project structure, shell commands, and other important information, read the current plan: specs/001-fraud-detection-engine/plan.md ## Tech Stack - **Backend**: Python 3.12, FastAPI, SQLAlchemy 2.0, Pydantic v2, Alembic - **Frontend**: React 19, TypeScript, Tailwind CSS, Recharts, Vite - **Storage**: PostgreSQL 16, Redis 7 - **Testing**: pytest, Vitest, Playwright ## Quick Reference - Start backend: `cd backend && uv run uvicorn fraudshield.main:app --reload` - Start frontend: `cd frontend && npm run dev` - Run tests: `cd backend && uv run pytest`, `cd frontend && npm test` - API docs: http://localhost:8000/docs (auto-generated OpenAPI) - Quickstart: specs/001-fraud-detection-engine/quickstart.md