القائمة
Migrate Python type checking from mypy to ty (Astral). Use when mirrors-mypy is in .pre-commit-config.yaml or [tool.mypy] config exists.
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npx skills add https://github.com/laurigates/claude-plugins --skill mypy-to-tyيبقى الأمر في سطر واحد. مرّر أفقيًا لمراجعته كاملًا قبل النسخ.
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عرض SKILL.md
استنادا إلى تصنيف SOC المهني
| name | mypy-to-ty |
| description | Migrate Python type checking from mypy to ty (Astral). Use when mirrors-mypy is in .pre-commit-config.yaml or [tool.mypy] config exists. |
| allowed-tools | Read, Write, Edit, Glob, Grep, Bash(find *), Bash(test *), Bash(pre-commit *), Bash(uvx *), AskUserQuestion, TodoWrite |
| model | sonnet |
| args | [--check-only] [--fix] |
| argument-hint | [--check-only] [--fix] |
| created | "2026-04-14T00:00:00.000Z" |
| modified | "2026-05-09T00:00:00.000Z" |
| reviewed | "2026-04-14T00:00:00.000Z" |
Migrate from mypy to ty — Astral's new fast Python type checker. Replaces the mirrors-mypy pre-commit hook with a local repo: local hook using uvx ty check, migrates config from [tool.mypy] to [tool.ty], and removes mypy.ini.
| Use this skill when... | Keep mypy when... |
|---|---|
.pre-commit-config.yaml contains mirrors-mypy | ty does not yet support a specific mypy plugin you rely on |
[tool.mypy] section exists in pyproject.toml | CI pipeline depends on mypy-specific exit codes or plugins |
| You want faster type checking (ty is written in Rust) | Project uses mypy daemon (dmypy) for incremental checks |
| Repo uses uv and the astral stack already | Team prefers mypy's error message format |
find . -maxdepth 1 -name '.pre-commit-config.yaml'find . -maxdepth 1 -name 'pyproject.toml'find . -maxdepth 1 -name 'mypy.ini'find . -maxdepth 1 -name 'uv.lock'| Parameter | Description |
|---|---|
--check-only | Report what would change without modifying files |
--fix | Apply migration automatically |
Execute this mypy-to-ty migration:
.pre-commit-config.yaml and locate any mirrors-mypy or mypy entries.pyproject.toml and extract the [tool.mypy] section.mypy.ini.mypy → ty migration audit
==========================
pre-commit hook: mirrors-mypy found at rev <rev>
pyproject.toml: [tool.mypy] section found (N lines)
mypy.ini: FOUND / NOT FOUND
uv.lock: EXISTS (uv available) / MISSING
--check-onlyRemove the mirrors-mypy repo block. Add a repo: local hook for ty:
- repo: local
hooks:
- id: ty
name: ty type check
entry: uvx ty check
language: system
types: [python]
pass_filenames: false
Note: astral-sh/ty-pre-commit does not yet exist as a hosted pre-commit repo. The repo: local pattern with uvx ty check is the correct approach until an official mirror is published.
If an entry: mypy hook in a non-mirrors-mypy repo exists, replace it similarly.
Read the [tool.mypy] section and convert each key to the ty equivalent:
| mypy key | ty equivalent | Notes |
|---|---|---|
python_version | python-version | Rename only |
strict | strict | Same |
warn_return_any | warn-return-any | Kebab-case |
disallow_untyped_defs | disallow-untyped-defs | Kebab-case |
ignore_missing_imports | Not needed | ty resolves stubs natively |
exclude | exclude | Same |
Per-module [[tool.mypy.overrides]] | Drop or convert manually | Note for manual review |
Remove the [tool.mypy] section (and any [[tool.mypy.overrides]] sections). Add [tool.ty] with converted keys. Annotate any options that need manual review.
If mypy.ini exists, delete it. Its content should already be in [tool.ty] after Step 3.
If mypy appears in pyproject.toml dev/lint dependencies, remove it:
# With uv
uvx --from uv uv remove --dev mypy 2>/dev/null || true
If not using uv, note it for manual removal.
Run the new hook to confirm it works:
pre-commit run ty --all-files
If it exits 0, the migration is complete. If it exits non-zero:
Print a summary of all changes made and list files to commit:
mypy → ty migration complete
=============================
.pre-commit-config.yaml UPDATED (removed mirrors-mypy, added local ty hook)
pyproject.toml UPDATED ([tool.mypy] → [tool.ty])
mypy.ini DELETED / NOT FOUND
Manual review needed:
- [[tool.mypy.overrides]] sections were dropped — verify ty handles them
- Check ty docs for any unsupported mypy options
Files to stage:
git add .pre-commit-config.yaml pyproject.toml
| Context | Command |
|---|---|
| Audit only | /migration-patterns:mypy-to-ty --check-only |
| Apply migration | /migration-patterns:mypy-to-ty --fix |
| Verify after migration | pre-commit run ty --all-files |
| Test ty directly | uvx ty check . |
| Item | Value |
|---|---|
| ty docs | https://github.com/astral-sh/ty |
| Pre-commit hook type | repo: local, entry: uvx ty check |
| Config section | [tool.ty] in pyproject.toml |
| Key difference | ty uses kebab-case keys; mypy uses underscore |
/migration-patterns:black-to-ruff-format — Migrate from black to ruff format/migration-patterns:flake8-to-ruff — Migrate flake8/isort to ruff/configure:repo — End-to-end repo config driver