oh-my-githubcopilot: Skill for Claude Code

Security Scan

Rapid security sweep for code changes. Faster than a full /review — focused on security only.

When to Use

• Before committing code that touches auth, user input, data storage, or external APIs
• After adding new dependencies
• Quick pre-PR security gate

Scan Protocol

Step 1: Determine Scope

# Default: scan recent changes
git diff --name-only HEAD~1

# Or use provided path

Step 2: Secrets Scan

# Scan for common secret patterns
grep -rn --include="*.{ts,js,py,go,rs,java,cs,yaml,json,env,sh,toml}" \
  -e "sk-[A-Za-z0-9]\{32,\}" \
  -e "ghp_[A-Za-z0-9]\{36\}" \
  -e "AKIA[0-9A-Z]\{16\}" \
  -e "api.key\s*=\s*['\"][^'\"]\{8,\}" \
  -e "password\s*=\s*['\"][^'\"]\{4,\}" \
  -e "secret\s*=\s*['\"][^'\"]\{8,\}" \
  .

# Check .env is in .gitignore
cat .gitignore | grep -E "\.env$|\.env\."

CRITICAL: Any match in committed code = immediate blocker.

Step 3: Dependency Audit

Run language-appropriate audit:

# Node.js
npm audit --audit-level=high

# Python
pip-audit  # or: safety check

# Rust
cargo audit

# Go
govulncheck ./...

# Java/Maven
mvn dependency-check:check

Report: Count of critical/high severity CVEs and their package names.

Step 4: Input Validation Spot-Check

For changed files that handle user input (API endpoints, form handlers, CLI args):

• Is input validated/sanitized before use?
• Are SQL queries parameterized (no string concatenation)?
• Is HTML output escaped before rendering?
• Are file paths sanitized (no ../ traversal)?

Step 5: Auth/Authz Quick Check

For changed files touching auth:

• Is authentication checked BEFORE authorization?
• Are authorization checks on EVERY relevant endpoint?
• Are JWT tokens validated (algorithm + signature + expiry)?
• Are session cookies HttpOnly; Secure; SameSite=Strict?

---

Output Format

## Security Scan Report

**Scope:** [files scanned]
**Date:** [timestamp]

### Secrets
- [ ] No hardcoded secrets found
- ⚠ Found: [file:line — description]

### Dependencies
- Critical CVEs: X
- High CVEs: Y
- Packages: [list if any]

### Input Validation
- [ ] User inputs sanitized in changed files
- ⚠ Risk: [file:line — description]

### Auth
- [ ] Auth/authz checks present on relevant routes
- ⚠ Risk: [file:line — description]

### Verdict
CLEAN / NEEDS ATTENTION / BLOCKER

### Next Steps
- [Action items with file:line references]