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Spec GitHub Repositories (2026) · Open Source Tools

Discover the best Spec open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.

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6 matching projects · updated Nov 13, 2026 How we rank ↗

#1 TRENDING github/spec-kit Python NEW 2025

💫 Toolkit to help you get started with SDD or any other process!

◇ ai ◇ copilot ◇ development ◇ engineering

12.7K ↑ +100 today

#2 TRENDING Fission-AI/OpenSpec TypeScript NEW 2025

Spec-driven development (SDD) for AI coding assistants.

◇ ai ◇ context-engineering ◇ engineering ◇ planning

5.1K ↑ +248 today

#3 TRENDING rpamis/comet JavaScript NEW 2026

Comet: agent skill harness for turning ideas into evaluated workflows

◇ ai ◇ eval ◇ harness-engineering ◇ loop-engineering

312 ↑ +11 today

#4 TRENDING ariel-frischer/autospec Go NEW 2025

CLI for streamlined spec-driven development

◇ agentic-workflow ◇ ai ◇ claude-code ◇ codex

8 ↑ +1 today

#5 TRENDING kahlan/kahlan PHP 2013

:heavy_check_mark: PHP Test Framework for Freedom, Truth, and Justice

◇ bdd ◇ coverage ◇ monkey-patching ◇ php

69 ↑ +1 today

#6 TRENDING suites-dev/unit TypeScript 2021

A unit testing framework for TypeScript backends working with inversion of control and dependency injection

◇ dependency-injection ◇ inversifyjs ◇ inversion-of-control ◇ ioc

20 ↑ +1 today

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