## Summary

<!-- What changed and why? 1-3 sentences. -->

## Category

<!-- Which skills or areas of the repo are affected? -->

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## Source

<!-- If adding techniques from writeups, link them here. Remove if not applicable. -->

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## Checklist

- [ ] `pytest` tests pass (`python -m pytest tests/ -v`)
- [ ] Security audit is clean (`python3 scripts/skill_security_auditor.py <skill-dir> --strict`) <!-- e.g., ctf-web -->
- [ ] Markdown lint is clean (`markdownlint-cli2`)
- [ ] Pre-commit hooks ran successfully (`pre-commit run --all-files`)
- [ ] No leaked credentials, real IPs, or non-example domains in content
