.cursorrules

# Cursor Rules for EphemerisMCP

## Stack
- Python 3.11 (strict)
- uv package manager
- hatchling build backend
- FastMCP for MCP server
- Pydantic V2 for validation
- Ruff for linting/formatting

## Code Style
- Type hints on ALL function signatures
- Composition over inheritance
- 120 character line length
- Google-style docstrings
- No bare `except:` clauses

## Patterns
- Use `logging` module, never `print()`
- Raise `ValueError` for invalid inputs
- Return typed dicts or Pydantic models
- Keep functions under 50 lines

## Boundaries
- NEVER commit secrets or API keys
- NEVER modify uv.lock manually
- NEVER use `# type: ignore` without comment
- ALWAYS reference AGENTS.md for context

## Commands
- `make test` before committing
- `make lint` to check style
- `make format` to auto-fix

## Commits
Follow Conventional Commits:
- `feat:` new feature (minor bump)
- `fix:` bug fix (patch bump)
- `docs:` documentation only
- `chore:` maintenance
- `refactor:` code change, no feature change