chore: add pre-commit config running ruff

.pre-commit-config.yaml

@@ -0,0 +1,14 @@
+# Pre-commit hooks mirroring the CI lint job (.github/workflows/ci.yml).
+# ruff rev is pinned to match requirements-dev.txt so local == CI.
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.15.0
+    hooks:
+      - id: ruff
+        name: ruff check
+        args: ["--config", "custom_components/andersen_ev/ruff.toml"]
+        files: ^custom_components/andersen_ev/.*\.py$
+      - id: ruff-format
+        name: ruff format
+        args: ["--config", "custom_components/andersen_ev/ruff.toml"]
+        files: ^custom_components/andersen_ev/.*\.py$

README.md

@@ -74,6 +74,26 @@ data:
   device_id: "YOUR_DEVICE_ID"
 ```
 
+## Development
+
+### pre-commit
+
+This repo ships a `.pre-commit-config.yaml` that runs the same ruff lint and
+format checks as CI (pinned to the same ruff version), so issues are caught
+locally before you push. To enable it:
+
+```bash
+pip install pre-commit   # or: pip install -r requirements-dev.txt
+pre-commit install
+```
+
+The hooks then run automatically on `git commit`. To run them across the
+integration source on demand:
+
+```bash
+pre-commit run --all-files
+```
+
 ## Future development
 Frankly depends on whether or not I sell my house (with the charger).
 

requirements-dev.txt

@@ -5,3 +5,4 @@ pytest
 pytest-asyncio
 pytest-cov
 mypy
+pre-commit