Review documentation coverage for this feature group.

Check docs/ for each feature listed. For every feature:
- Verify documentation exists and is accurate.
- If docs are missing, incomplete, or out of date — fix them directly.
- Improve clarity, add usage examples, and correct errors.
- Do NOT modify the README.

You MUST succeed regardless of what you find. Fix any issues and report what you changed.
Score 0–100 based on documentation completeness AFTER your fixes.
