Updating `defaults.yaml`¶

defaults.yaml is auto-generated from the pydantic field defaults in config.py and committed to the repo. It serves as a human-readable reference that users can browse on GitHub without running Python.

Workflow¶

Change the default value in src/pclean/config.py.
Regenerate the snapshot:
```
pixi run -e dev gen-defaults
```
Commit both config.py and defaults.yaml together.

CI Guard (optional)¶

Add a step that regenerates the file and asserts no diff, catching cases where step 2 was forgotten:

- name: Check defaults.yaml is up to date
  run: |
    pixi run -e dev gen-defaults
    git diff --exit-code src/pclean/configs/defaults.yaml