Frameworks, toolkits, and methodologies that put specifications at the center of AI-native development.
A lightweight spec-driven framework for coding agents and CLIs
Universal, open source, and no API keys or MCP required. OpenSpec has become the go-to planning layer for many developers, providing slash commands and native integrations with popular AI coding tools.
npm install -g @fission-ai/openspec@latestNever Trust a Monkey: cryptographic assertion integrity for AI code
IIC closes the gap between spec and code with tamper-proof behavioral contracts. Assertions are deterministically extracted from specs, cryptographically hashed, and locked before implementation, so the AI can iterate on code but cannot modify what "passing" means.
tessl install tessl-labs/intent-integrity-kitBuild high-quality software faster, by GitHub
An open source toolkit that helps you focus on product scenarios and predictable outcomes instead of vibe coding from scratch. Agent-agnostic, works with Copilot, Claude Code, and Gemini CLI. Includes the Specify CLI with structured phases: Specify → Plan → Tasks → Implement.
npx specify initBreakthrough Method for Agile AI-Driven Development
The most comprehensive Agile AI-driven development framework with true scale-adaptive intelligence. Features 12+ specialized agents (PM, Architect, Developer, UX, Scrum Master), Party Mode for multi-agent collaboration, and a complete lifecycle from brainstorming to deployment. 100% free and open source.
npx bmad-method installSpec-first agentic IDE by Amazon
A simpler, spec-first approach to agentic coding. Kiro focuses on natural language specifications that drive AI code generation, with deep integration into AWS services and enterprise-grade guardrails. Purpose-built for teams that want rails on their AI workflows.