Switch from mypy to ty and update .gitignore

- Replace mypy with ty (Astral's new type checker) using uv commands
- Update .gitignore to exclude build artifacts, .venv, and .python-version
- Update GitHub workflow from mypy to ty
- Update tool configuration in pyproject.toml
- Update UV_MIGRATION.md documentation

Author: bubthegreat

.github/workflows/mypy.yml

@@ -1,4 +1,4 @@
-name: mypy
+name: ty
 
 on:
   push:
@@ -30,5 +30,5 @@ jobs:
     - name: Install dependencies
       run: uv sync --all-extras
 
-    - name: Run mypy
-      run: uv run mypy src
+    - name: Run ty
+      run: uv run ty check src

.gitignore

@@ -10,3 +10,16 @@ data/players/
 data/world/instances/
 instance_tracker.txt
 *.egg-info/
+
+# Build artifacts
+build/
+dist/
+*.egg
+.eggs/
+
+# UV
+.venv/
+uv.lock
+
+# Python version
+.python-version

UV_MIGRATION.md

@@ -66,8 +66,8 @@ uv run pytest
 # Run tests with coverage
 uv run pytest --cov=rom24
 
-# Run mypy type checking
-uv run mypy src
+# Run ty type checking (Astral's new type checker)
+uv run ty check src
 
 # Run black formatter
 uv run black src
@@ -117,6 +117,7 @@ uv lock --upgrade-package package-name
 - The entry point `rom24` is defined in `[project.scripts]`
 - Python 3.12+ is required (down from 3.14 in the old config)
 - All GitHub Actions workflows now use UV for faster CI/CD
+- Using `ty` (Astral's new type checker) instead of mypy
 
 ## Troubleshooting
 

pyproject.toml

@@ -15,12 +15,12 @@ dependencies = [
 dev = [
     "black>=24.10.0",
     "ipdb>=0.13.13",
-    "mypy>=1.14.1",
     "pre-commit>=4.0.1",
     "pytest>=9.0.2",
     "pytest-xdist>=3.6.1",
     "pytest-cov>=6.0.0",
     "ruff>=0.8.4",
+    "ty>=0.0.14",
 ]
 
 [project.scripts]
@@ -45,11 +45,8 @@ ignore = ["E501"]  # Line too long (handled by formatter)
 line-length = 120
 target-version = ["py312"]
 
-[tool.mypy]
+[tool.ty]
 python_version = "3.12"
-warn_return_any = true
-warn_unused_configs = true
-disallow_untyped_defs = false
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]