Verification Loop

Verification Loop Skill

A comprehensive verification system for Claude Code sessions.

When to Use

Invoke this skill:

• After completing a feature or significant code change
• Before creating a PR
• When you want to ensure quality gates pass
• After refactoring

Verification Phases

Phase 1: Build Verification

# Check if project buildsnpm run build 2>&1 | tail -20# ORpnpm build 2>&1 | tail -20

If build fails, STOP and fix before continuing.

Phase 2: Type Check

set -o pipefail# TypeScript projectsnpx --no-install tsc --noEmit 2>&1 | head -30
# Python projectspyright . 2>&1 | head -30

Report all type errors. Fix critical ones before continuing.

Phase 3: Lint Check

# JavaScript/TypeScriptnpm run lint 2>&1 | head -30
# Pythonruff check . 2>&1 | head -30

Phase 4: Test Suite

# Run tests with coveragenpm run test -- --coverage 2>&1 | tail -50
# Check coverage threshold# Target: 80% minimum

Report:

• Total tests: X
• Passed: X
• Failed: X
• Coverage: X%

Phase 5: Security Scan

# Check for secretsgrep -rn "sk-" --include="*.ts" --include="*.js" . 2>/dev/null | head -10grep -rn "api_key" --include="*.ts" --include="*.js" . 2>/dev/null | head -10
# Check for console.loggrep -rn "console.log" --include="*.ts" --include="*.tsx" src/ 2>/dev/null | head -10

Phase 6: Diff Review

# Show what changedgit diff --statgit diff HEAD~1 --name-only

Review each changed file for:

• 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:1. ...2. ...

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.