{"data":{"slug":"openspec","name":"OpenSpec","tagline":"MIT spec-driven change tooling for coding agents","category":"agents","categoryName":"AI Agents","url":"https://openspec.dev/","github":"https://github.com/Fission-AI/OpenSpec","pricing":"open-source","hook":"OpenSpec is spec-driven change tooling for AI coding assistants — agree on the change before the agent writes the code.","whatsGood":"MIT (Fission-AI/OpenSpec). Lightweight SDD workflow: propose → apply → archive with `/opsx:*` slash commands and a CLI (`@fission-ai/openspec`). Aligns humans and coding agents on proposal/specs/design/tasks before implementation. Site at openspec.dev; huge adoption (~69k★). Works across Claude Code, Codex, Cursor, and many other agent hosts.","theCatch":"Needs an AI coding-agent host — OpenSpec is tooling around the agent, not a product that ships code by itself. Vs Spec Kit (heavier phase-gated SDD): OpenSpec is lighter and more iterate-friendly, still not a standalone SaaS. You still pay (or self-host) the coding agent that runs the slash commands.","verdict":"MIT spec-driven agent tooling. Align before code; host agent required — not a product alone.","addedAt":"2026-09-17","featured":false,"domain":"AI Agents","subSpecialty":"Coding Agents","subcategory":"Coding Agents","tags":["self-host","permissive","coding-agents","active","fast-stars"],"capabilities":["specs","workflow","agents"],"surfaces":["Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"OSS/MIT","githubStars":72345,"starsPerWeek":1149,"access":"free","archived":false,"repo":{"createdAt":"2025-08-05","pushedAt":"2026-10-19","license":"MIT","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"claude-code","name":"Claude Code","tagline":"Terminal-first coding agent with deep repository context"},{"slug":"cursor","name":"Cursor","tagline":"The AI-first code editor that understands your codebase"},{"slug":"devin","name":"Devin","tagline":"Autonomous AI engineer for defined engineering tasks"},{"slug":"stagehand","name":"Stagehand","tagline":"AI-native browser automation that mixes code and natural language"},{"slug":"browser-use","name":"Browser Use","tagline":"Open-source framework for LLM-driven browser agents"}],"links":{"self":"/api/gems/openspec","html":"/gems/openspec","markdown":"/gems/openspec.md","category":"/api/gems?category=agents","categoryPage":"/stacks/agents"}}