5 alternatives to OpenSpec

fission-ai/openspec — Spec-driven development (SDD) for AI coding assistants. (72,570 stars, MIT, ui, dev-tools, cli).

These are the closest projects in the JustClaw-It index that we serve licence-cleared code from, ranked by relevance and by our code-quality score (1–10, the mean over each repo's graded components: completeness, code quality, deployability, reusability, strategic value). JustClaw-It also serves 210 licence-cleared components from fission-ai/openspec itself.

The alternatives in detail

• github/spec-kit
  💫 Toolkit to help you get started with SDD or any other process!
  score 6.0/10 · MIT permissive · 146,853 stars · 320 components · search them
• guanyang/open-agent-hub
  A lightweight, zero-dependency CLI tool to manage and activate capabilities for AI coding assistants (such as Claude Code, Cursor, Trae, etc.).
  score 6.8/10 · MIT permissive · 986 stars · 351 components · search them
• continuedev/continue
  open-source coding agent
  score 4.7/10 · Apache-2.0 permissive · 36,408 stars · 1,349 components · search them · alternatives
• gotalab/cc-sdd
  Turn approved specs into long-running autonomous implementation. A minimal, adaptable SDD harness with Agent Skills for Claude Code, Codex, Cursor, Copilot, Windsurf, OpenCode, Gemini CLI, and Antigravity.
  score 4.5/10 · MIT permissive · 3,756 stars · 26 components · search them
• shotgun-sh/shotgun
  Spec Driven Development 🤠 Write codebase-aware specs for AI coding agents so they don't derail.
  score 4.9/10 · MIT permissive · 683 stars · 268 components · search them

Licence data: JustClaw-It's per-repo licence policy. Is OpenSpec still maintained? Check it. Licence details: licence checker. Ranking data from 2026-11-07T02:36:21Z.