Verification Loop Skill
A comprehensive verification system for Claude Code sessions.
When to Use
Invoke this skill:
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After completing a feature or significant code change
-
Before creating a PR
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When you want to ensure quality gates pass
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After refactoring
Verification Phases
Phase 1: Build Verification
Check if project builds
npm run build 2>&1 | tail -20
OR
pnpm build 2>&1 | tail -20
If build fails, STOP and fix before continuing.
Phase 2: Type Check
TypeScript projects
npx tsc --noEmit 2>&1 | head -30
Python projects
pyright . 2>&1 | head -30
Report all type errors. Fix critical ones before continuing.
Phase 3: Lint Check
JavaScript/TypeScript
npm run lint 2>&1 | head -30
Python
ruff check . 2>&1 | head -30
Phase 4: Test Suite
Run tests with coverage
npm run test -- --coverage 2>&1 | tail -50
Check coverage threshold
Target: 80% minimum
Report:
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Total tests: X
-
Passed: X
-
Failed: X
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Coverage: X%
Phase 5: Security Scan
Check for secrets
grep -rn "sk-" --include=".ts" --include=".js" . 2>/dev/null | head -10 grep -rn "api_key" --include=".ts" --include=".js" . 2>/dev/null | head -10
Check for console.log
grep -rn "console.log" --include=".ts" --include=".tsx" src/ 2>/dev/null | head -10
Phase 6: Diff Review
Show what changed
git diff --stat git diff HEAD~1 --name-only
Review each changed file for:
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Unintended changes
-
Missing error handling
-
Potential edge cases
Output Format
After running all phases, produce a verification report:
VERIFICATION REPORT
Build: [PASS/FAIL] Types: [PASS/FAIL] (X errors) Lint: [PASS/FAIL] (X warnings) Tests: [PASS/FAIL] (X/Y passed, Z% coverage) Security: [PASS/FAIL] (X issues) Diff: [X files changed]
Overall: [READY/NOT READY] for PR
Issues to Fix:
- ...
- ...
Continuous Mode
For long sessions, run verification every 15 minutes or after major changes:
Set a mental checkpoint:
- After completing each function
- After finishing a component
- Before moving to next task
Run: /verify
Integration with Hooks
This skill complements PostToolUse hooks but provides deeper verification. Hooks catch issues immediately; this skill provides comprehensive review.