Commit Security Scan

This is a bundled local Bug Hunter companion skill. It is portable and self-contained: use .bug-hunter/* artifacts, never .factory/* paths.

Purpose

Review changed code for security issues only. This skill is optimized for:

• PR review
• staged diff review
• branch diff review
• commit / commit-range security scanning

Inputs

Resolve the scan scope from the user request:

• PR review → use scripts/pr-scope.cjs
• staged review → use git diff --cached --name-only
• branch diff → use git diff --name-only <base>...<head>
• commit range → use git diff --name-only <base>..<head>

Workflow

1. Ensure threat-model context exists.

   • Preferred artifacts:
     • .bug-hunter/threat-model.md
     • .bug-hunter/security-config.json
   • If missing, run the bundled threat-model-generation skill first.

2. Resolve the changed-file scope.

3. Read the full contents of the changed source files, not just the patch.

4. Focus on STRIDE-oriented issues in changed code:

   • Spoofing: auth/session/token mistakes
   • Tampering: SQLi, XSS, path traversal, command injection, mass assignment
   • Repudiation: security-sensitive actions with no auditability
   • Information Disclosure: IDOR, secret exposure, verbose errors
   • DoS: unbounded input, missing limits, expensive regex/queries
   • Elevation of Privilege: missing authorization, role bypass, privilege escalation

5. Reuse Bug Hunter-native security conventions:

   • findings should be compatible with .bug-hunter/hunter-findings.json
   • use STRIDE + CWE labels
   • include confidence scores

6. If the user wants only a focused security diff review, stop after the findings report. If the user wants deeper validation, hand off to the bundled vulnerability-validation skill.

Output

Preferred outputs:

• .bug-hunter/hunter-findings.json when integrating with the main Bug Hunter pipeline
• .bug-hunter/report.md as a rendered companion if needed

Notes

• This skill is intentionally diff-scoped; it does not replace full-repository audits.
• Use it as the lightweight security fast-path before invoking the broader security-review flow.