stack/packages/mosaic/framework/tools/quality

Quality Rails

Portable quality enforcement for TypeScript, Python, and Node.js projects.

🎯 What This Prevents

Based on real-world validation of 50 issues in a production codebase:

• ❌ Hardcoded passwords
• ❌ SQL injection vulnerabilities
• ❌ Type safety violations (any types)
• ❌ Missing test coverage
• ❌ Build failures
• ❌ Dependency vulnerabilities

70% of these issues are prevented mechanically with quality-rails.

⚡ Quick Start (Mosaic)

New Project

# Apply template from Mosaic
~/.config/mosaic/bin/mosaic-quality-apply --template typescript-node --target /path/to/project

# Install dependencies
cd /path/to/project
npm install

# Initialize git hooks
npx husky install

# Verify enforcement is working
~/.config/mosaic/bin/mosaic-quality-verify --target /path/to/project

Existing Project

# Same as above - works for new or existing projects
~/.config/mosaic/bin/mosaic-quality-apply --template typescript-node --target /path/to/existing-project

🛡️ What You Get

✅ TypeScript strict mode - All type checks enabled ✅ ESLint blocking any types - no-explicit-any: error ✅ Pre-commit hooks - Type check + lint + format before commit ✅ Secret scanning (gitleaks) - Block hardcoded passwords/API keys (pre-commit + CI) ✅ CI/CD templates - Woodpecker, GitHub Actions, GitLab ✅ Test coverage enforcement - 80% threshold ✅ Security scanning - npm audit, OWASP checks

📦 Available Templates

Template	Language	Framework	Status
typescript-node	TypeScript	Node.js	✅ Ready
typescript-nextjs	TypeScript	Next.js	✅ Ready
monorepo	TypeScript	TurboRepo + pnpm	✅ Ready
python	Python	-	🚧 Coming Soon

Monorepo Template

Perfect for projects combining Next.js frontend + NestJS backend in one repository.

Features:

• 🎯 Multi-package aware - lint-staged only checks changed packages
• ⚡ TurboRepo caching - Faster builds and tests
• 🔀 Parallel dev servers - Run web + API simultaneously
• 📦 pnpm workspaces - Efficient dependency management
• 🛡️ Package-specific rules - Next.js and NestJS get appropriate ESLint configs

Example structure:

monorepo/
├── apps/
│   ├── web/    # Next.js frontend
│   └── api/    # NestJS backend
└── packages/
    ├── shared-types/
    ├── ui/
    └── config/

🧪 How It Works

Pre-Commit (Local Enforcement)

# You try to commit code with a type error
git commit -m "Add feature"

# Quality rails blocks it:
❌ Type error: Type 'number' is not assignable to type 'string'
❌ ESLint: Unexpected any. Specify a different type.
✋ Commit blocked - fix errors and try again

CI/CD (Remote Enforcement)

# Woodpecker pipeline runs:
✓ gitleaks (secret scanning — parallel, no deps)
✓ npm audit (dependency security)
✓ eslint (code quality)
✓ tsc --noEmit (type checking)
✓ jest --coverage (tests + coverage)
✓ npm run build (compilation — gates on all above)
# If any step fails, merge is blocked

🎓 Philosophy

Process compliance doesn't work.

Instructing AI agents to "do code review" or "run tests" fails. They claim to follow processes but output quality doesn't match claims.

Mechanical enforcement works.

Quality rails don't ask agents to follow processes. They block commits that don't pass automated checks.

• Type errors? → Commit blocked
• Hardcoded secrets? → Commit blocked
• Test failures? → Commit blocked
• Missing coverage? → Commit blocked

This works for any agent runtime (Codex, Claude, OpenCode, Gemini, etc.) because enforcement is mechanical, not instructional.

Read more: PHILOSOPHY.md

📖 Documentation

• TypeScript Setup Guide
• CI/CD Configuration

🔧 Scripts

Script	Purpose
scripts/install.sh	Install template to project (Linux/Mac)
scripts/install.ps1	Install template to project (Windows)
scripts/verify.sh	Verify enforcement is working (Linux/Mac)
scripts/verify.ps1	Verify enforcement is working (Windows)

🚀 Roadmap

• TypeScript/Node template
• Pre-commit enforcement (husky + lint-staged)
• CI/CD templates (Woodpecker, GitHub Actions)
• Installation scripts
• Verification testing
• Next.js template
• Monorepo template
• Python template
• Coverage visualization
• IDE integration (VSCode extension)

🤝 Contributing

Quality Rails is based on lessons learned from real production codebases. Contributions welcome!

📝 License

MIT License - See LICENSE file for details

🙏 Credits

Built to solve real problems discovered in AI-assisted development workflows.

Based on validation findings from a production patch milestone.