# Ty migration notes

This repository has been migrated from **mypy** to **Astral ty** for generated project type checking.

## What changed

- Replaced the generated type-check config fragment:
  - `template/mypy-config.toml` ➜ `template/ty-config.toml`
- Updated config assembly in `src/uv_start/dev_deps.py` so generated `pyproject.toml` files now include `[tool.ty]` settings.
- Updated generated dev dependencies in `src/uv_start/dev_deps.py`:
  - `uv add --dev ... mypy ...` ➜ `uv add --dev ... ty ...`
- Updated generated CI template (`template/.github/workflows/ci.yml`) to run Ty:
  - `uv run ty check src tests`
- Updated repository docs/tests that referenced mypy to refer to Ty.

## Ty usage in generated projects

Run type checks with:

```bash
uv run ty check src tests
```

Ty configuration is generated into each project's `pyproject.toml` under `[tool.ty]`.