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name: security_audit description: Checklist for security-sensitive coding, ensuring MaiHouses guards and policies are respected. allowed-tools: Read, Grep, Glob

Security Audit Protocol

1. Critical "Guard" Files

WARNING: The following files are OFF-LIMITS for modification without explicit user approval.

• scripts/ai-diff-gate.ts
• .github/workflows/**
• Any file with midlaw or policy in the name.

2. Database Security (Supabase)

• RLS (Row Level Security):
  • EVERY table must have RLS enabled.
  • Policies must explicitly define USING and WITH CHECK clauses.
  • NEVER use service_role key in frontend client code.
• SQL Injection:
  • Use parameterized queries or ORM methods (Supabase JS client) only.
  • Avoid raw SQL string concatenation.

3. API Security

• Authentication:
  • Verify user exists in req (usually populated by middleware/auth helper).
  • Check permissions before performing actions (e.g. checkPermission(user.id, 'post.create')).
• Input Validation:
  • Validate ALL inputs using zod schemas.
  • Sanitize HTML inputs if rendering user content (use DOMPurify).

4. Audit Checklist

• Are guards/policies untouched?
• Is RLS enabled and tested?
• Is input validation (zod) in place?
• Are no secrets committed to code?
• Did I run /security-review (if available) or manual check?