ConstitutionKit

ConstitutionKit

**Generate production-ready engineering constitutions for AI-first projects.**

[**Try it live →**](https://younss.github.io/ConstitutionKit/)

ConstitutionKit is a browser-side tool that generates up to three files:

• constitution.md — foundational principles, behavioral contracts, and a spec-driven development workflow (including LLM review gates) for your project, readable by humans and AI agents alike (used by spec-kit)
• CLAUDE.md — agent-specific instructions for Claude Code: allowed tools, forbidden paths, build commands, and autonomy boundaries
• AGENTS.md — the cross-tool standard agent-instructions file read by Codex, Cursor, Copilot, and other coding agents. Generate it alongside CLAUDE.md and ConstitutionKit automatically turns CLAUDE.md into a thin file that @-imports AGENTS.md, so the two never duplicate (or drift from) the same content.

Everything runs in your browser. No account, no server, no data sent anywhere.

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Features

• Project types — Web App, Microservices, Data Pipeline, AI System, Platform/SDK, Mobile App, Flutter App, Full-Stack Solution, WhatsApp Agent
• Principle library — 99 principles across 10 categories: Software Engineering, Testing, Error Handling, API Design, Data & State, Architecture, Agentic AI, UX & Design, Security, Messaging & Conversational AI
• 12 Presets — Web App Essentials, AI-First Stack, Startup Speed, Enterprise Grade, Security-Critical, Microservices, Data Pipeline, Platform/SDK, Mobile (Native), Flutter/Dart, Full-Stack, WhatsApp Agent
• Instant principle search — real-time keyword search across 99 principles by name, tag, or rule with keyboard shortcuts (/ to search, Esc to clear)
• Live agent token & context estimator — real-time token count, word count, line count, and context window footprint rating badge
• Spec-driven workflow guidance — `constitution.md