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

npx nx run-many --target=build --all --parallel 2>&1 | tail -20

If build fails, STOP and fix before continuing.

Phase 2: Type Check

npx tsc --noEmit 2>&1 | head -30

Report all type errors. Fix critical ones before continuing.

Phase 3: Lint Check

npx nx lint meerkat-core 2>&1 | head -30

Phase 4: Test Suite

# Run tests for affected project(s)
npx nx test meerkat-core 2>&1 | tail -50

# Run all tests
npx nx run-many --target=test --all 2>&1 | tail -50

# Target: 80% minimum coverage

Report:

• Total tests: X
• Passed: X
• Failed: X
• 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" packages/ 2>/dev/null | head -10

Phase 6: Diff Review

git diff --stat
git diff HEAD~1 --name-only

Review each changed file for:

• Unintended changes
• Missing error handling
• SQL injection risks (string concatenation instead of AST)
• Potential edge cases (null values, . delimiters, empty arrays)

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

Pre-Push Gate (MANDATORY)

Before ANY git push, run the full monorepo test suite:

npx nx run-many --target=test --all 2>&1 | tail -50

Rules:

• If ANY test fails, DO NOT push. Fix the failing tests first.
• This applies to all branches, not just main.
• Run this even if only one package was changed — cross-package regressions are common.
• After fixing failures, re-run the full suite to confirm before pushing.

Integration with Hooks

This skill complements PostToolUse hooks but provides deeper verification. Hooks catch issues immediately; this skill provides comprehensive review.