## Summary

<!-- What does this PR do? Why is it needed? -->

## Type of Change

- [ ] Bug fix
- [ ] New feature / sub-skill
- [ ] Documentation update
- [ ] Refactor / code quality
- [ ] Other (describe below)

## Checklist

- [ ] Tested with a real URL before submitting
- [ ] SKILL.md files stay under 500 lines (if modified)
- [ ] Python scripts output JSON (if modified)
- [ ] Reference files stay under 200 lines (if modified)
- [ ] `set -euo pipefail` used in any new shell scripts
- [ ] CHANGELOG.md updated with the change