Individual skill
security-guidance
Use when installing or tuning the PreToolUse security hook that warns before Claude writes command injection, XSS, SQL injection, unsafe deserialization, eval or GitHub Actions injection. Warns once per file and rule; ENABLE_SECURITY_REMINDER=0 turns it off.
engineering/security-guidance/skills/security-guidance/SKILL.md
Source commit 8f082544116fc0d014188e521ca40304cdfc86b0
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 10, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 29,603
- Repository last updated
- Nov 5, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- agentic-ai Repository topic
- anthropic-claude Repository topic
- claude-ai Repository topic
- claude-code Repository topic
- claude-skills Repository topic
- claude-code-skills Repository topic
- ai-coding-agent Repository topic
- claude-code-plugins Repository topic
- developer-tools Repository topic
- openai-codex Repository topic
- data Derived category
- security Derived category
- data-databases Derived category
- security-application Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
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# Security Guidance Hook
**A PreToolUse hook that blocks 12 common security anti-patterns before Claude Code writes them.**
This skill is a **hook**, not a slash command. Once installed, it runs automatically before every `Edit`, `Write`, or `MultiEdit` operation and warns + blocks if it detects a known dangerous pattern.
## What It Catches
The hook scans both:
- **The file path being edited** — flags GitHub Actions workflow files with risky `${{ }}` patterns
- **The content being written** — substring matches against 11 anti-patterns
| Pattern | Category | Risk |