OpenSpec
MIT spec-driven change tooling for coding agents
AI Agents / Coding Agents · OSS/MIT · 72.3k
Reviewed 2026-09-17 · last push 2026-10-19 · repo checked 2026-10-19
What's Good
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.
The Catch
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.
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Markdown
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