Fission-AI/OpenSpec
Spec-driven development (SDD) for AI coding assistants.
About the project
OpenSpec is a spec-driven development framework for AI coding assistants: it turns ideas into Markdown specs with requirements and scenarios before any code is written. It supports 30+ tools (Cursor, Copilot, Codex, etc.) and cross-repo planning via Stores.
Useful for
- Plan a feature with /opsx:propose to get proposal, specs, design and tasks before coding
- Run /opsx:explore to have the AI read the codebase and suggest an approach
- Share team requirements across repos in a separate planning repo via Stores
README summarized by DeepSeek V4.1 Flash. Details may be inaccurate.
Why it’s trending
- 226 stars so far today, about 305 expected by the end of the day. The usual pace is 115 per day, so that's 2.7× as much.
- Over the last two days the pace is 3× that of the previous week and a half.
- The spike has held for 3 days in a row — not a one-off blip.
- GitHub Trending today: #8, +298 stars.
- GitHub Trending TypeScript today: #3, +298 stars.
- Hacker News: “OpenSpec – A lightweight and configurable AI spec framework” — 196 points, 1 day ago.
- About 27 forks a day — people are taking the code.
- Recent forks include notable developers: @vicboma1 (306 followers).
Stars per day
Bars are daily stars, the line is the usual pace. Red marks spike days.
Numbers
- Total stars
- 69,216
- Stars in a day
- 305
- Forks
- 4,745
- Issues and pull requests
- 1,687
- Watchers
- 283
- Language
- TypeScript
- License
- MIT
- Latest release
- v1.13.1 · September 17, 2026
- Created
- August 5, 2025
- Last push
- September 17, 2026
Star trust
Growth looks organic: forks and discussion are in line with active projects, and stars arrive unevenly, the way people give them.
These are heuristics, not a verdict: we judge by the repository’s behavior, not by a list of stargazers.
Hacker News discussions
- OpenSpec – A lightweight and configurable AI spec framework196 points, September 16, 2026
Spotted in
- September 18, 2026GitHub Trending today: #8, +298 stars; GitHub Trending TypeScript today: #3, +298 stars
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README badge
Paste it into your README — the badge shows the current magnitude and links to this page.
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