Top 23 github-copilot Open-Source Projects

1. system-prompts-and-models-of-ai-tools

   1 22 143,951 8.4

   FULL Augment Code, Claude Code, Cluely, CodeBuddy, Comet, Cursor, Devin AI, Junie, Kiro, Leap.new, Lovable, Manus, NotionAI, Orchids.app, Perplexity, Poke, Qoder, Replit, Same.dev, Trae, Traycer AI, VSCode Agent, Warp.dev, Windsurf, Xcode, Z.ai Code, Dia & v0. (And other Open Sourced) System Prompts, Internal Tools & AI Models

   

   Project mention: I obtained Claude Opus 5 system prompt | news.ycombinator.com | 2026-07-30

2. AppSignal

   www.appsignal.com sponsored

   AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.

   

3. awesome-copilot

   2 34 39,849 9.9 JavaScript

   Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot.

   

   Project mention: GPT-5.6 launched and developers immediately hit their usage limits. The fix is not a bigger plan | dev.to | 2026-07-10

   5. context-map - 9,357 installs (GitHub) Generate a precise map of relevant files, dependencies and tests up front, so the agent navigates instead of exploring. Exploration is the silent budget killer: every wrong file opened is paid for again in every later turn that carries it.

4. Anthropic-Cybersecurity-Skills

   3 7 34,111 9.2 Python

   817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io standard · Works with Claude Code, GitHub Copilot, Codex CLI, Cursor, Gemini CLI & 20+ platforms · 29 security domains · Apache 2.0

   

   Project mention: Defensive cybersecurity skills (Blue team) | dev.to | 2026-10-10

   Github: https://github.com/fatehMohamed14/anthropic-cybersecurity-skills-defensive, This is a fork from https://github.com/mukul975/anthropic-cybersecurity-skills.

5. CopilotForXcode

   4 24 8,208 9.2 Swift

   The first GitHub Copilot, Codeium and ChatGPT Xcode Source Editor Extension

   

6. Mastering-GitHub-Copilot-for-Paired-Programming

   5 1 8,140 7.1 Python

   A multi-module course teaching everything you need to know about using GitHub Copilot as an AI Peer Programming resource.

   

7. copilot-api

   6 3 4,148 9.4 TypeScript

   Turn GitHub Copilot into OpenAI/Anthropic API compatible server. Usable with Claude Code!

   

   Project mention: GitHub Actions down again today | news.ycombinator.com | 2026-05-26

   Meanwhile people using a copilot proxy [1] with a third party harness have zero issues. Very clumsy enforcement if not a bug.

   [1] https://github.com/ericc-ch/copilot-api

8. copilot.lua

   7 21 4,100 9.0 Lua

   Fully featured & enhanced replacement for copilot.vim complete with API for interacting with Github Copilot

   

9. SaaSHub

   www.saashub.com sponsored

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

10. apm

    8 11 3,986 9.9 Python

    Agent Package Manager

    

    Project mention: What keeps an agent setup true | dev.to | 2026-10-02

    Microsoft APM

11. cc-sdd

    9 2 3,710 8.9 TypeScript

    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.

    

    Project mention: I Refused to Write Specs Until Claude Code Generated Wrong Code Three Times | dev.to | 2026-05-19

    This isn't original to me. The 2026 wave of spec-driven tooling (OpenSpec, cc-sdd, amux, Kiro) is all built on the same observation. GitHub Copilot Workspace doesn't even let you skip the step: it generates an editable "proposed specification" before it touches code, because the team that built it figured out that the spec is the only artifact in the workflow that the human can actually review.

12. CopilotChat.nvim

    10 7 3,653 8.3 Lua

    Chat with GitHub Copilot in Neovim

    

13. ruler

    11 7 2,943 9.4 TypeScript

    Ruler — apply the same rules to all coding agents

    

    Project mention: LNAI – Define AI coding tool configs once, sync to Claude, Cursor, Codex, etc. | news.ycombinator.com | 2026-02-03

    Is this substantially different than https://github.com/intellectronica/ruler? Or how would you differentiate?

14. flexpilot-ide

    12 3 2,654 0.0 TypeScript

    Flexpilot IDE - Open-Source AI Native IDE

    

15. spec-kitty

    13 4 1,678 10.0 Python

    Spec-Driven Development with organizational governance. Specs tell AI agents what to build; Charter governs how they build it. Git-native missions, enforceable workflows, and consistent engineering standards across AI coding agents and harnesses.

    

    Project mention: Read the Spec: Lock Intent Before you Implement | dev.to | 2026-05-20

    Spec Kitty is an open source SDD framework for agentic coding. Try it out!

16. awesome-gamedev-agent-skills

    14 1 1,440 8.7 Python

    74 game-dev skills for AI coding agents — Godot, Unity, Unreal, Phaser, PixiJS, three.js, Bevy, pygame, LÖVE, Roblox. Portable SKILL.md Agent Skills (the format Anthropic launched as Claude Skills), with a router that loads the right skill for your engine and task. Runs in Claude Code, Cursor, Kiro, Codex, Copilot, Gemini CLI and more.

    

    Project mention: How I automated the boring part of game development with AI skills | dev.to | 2026-06-27

    I built awesome-gamedev-agent-skills. It's 66 small focused skills plus a router that picks the right ones for you. Free, open source (Apache 2.0), one install:

17. copilot-cmp

    15 15 1,375 3.4 Lua

    Lua plugin to turn github copilot into a cmp source

    

18. ccmanager

    16 5 1,261 9.2 TypeScript

    Coding Agent Session Manager for Claude Code / Gemini CLI / Codex CLI / Cursor Agent / Copilot CLI / Cline CLI / OpenCode / Kimi CLI

    

    Project mention: I built a native macOS terminal so I'd stop losing track of my AI agents | dev.to | 2026-07-07

    Tools for dispatching agents per worktree already exist. ccmanager is well made, and I used it for a while. What didn't fit me was that you can't run more than one session in a single worktree. I often want an agent and a plain shell, or two agents, side by side on the same branch. Nothing wrong with ccmanager; it just didn't match how I work.

19. Chisle

    17 1 658 9.5 JavaScript

    Cut your AI coding agent's token bill on three axes: terse prose, YAGNI-first code, and tool-output compression. Claude Code, Pi, Cursor, Codex, Gemini + 4 more. Zero deps, published benchmarks including the runs it loses.

    

    Project mention: Caveman vs Ponytail vs Chisle: I benchmarked the Claude Code token-saving plugins on 20 tasks | dev.to | 2026-10-06

    In the July re-verification run, every answer from every arm was graded correct. None of these tools buys its savings with wrong answers. Every number comes from committed raw transcripts in the Chisle repo.

20. are-copilots-local-yet

    18 2 601 4.3 Python

    Are Copilots Local Yet? The frontier of local LLM Copilots for code completion, project generation, shell assistance, and more. Find tools shaping tomorrow's developer experience, today!

    

21. agent-skills

    19 1 471 8.1 QML

    Official Qt AI engineering skills for Claude Code, Codex, Copilot, Gemini,and other AI coding tools (by TheQtCompanyRnD)

    

    Project mention: Agent Skill for TDD | news.ycombinator.com | 2026-06-05

    I disagree. Not all skills are useless. For example, I sometime use Qt for GUI projects and I have found their skills [0] very useful to improve the quality and performance of my projects. I their absence, I would each time have to direct the agents to find the docs or specific tools, wasting tokens and thus decreasing the quality of the output.

    [0] https://github.com/TheQtCompanyRnD/agent-skills

22. Gito

    20 2 445 9.3 Python

    An AI-powered GitHub code review tool that uses LLMs to detect high-confidence, high-impact issues—such as security vulnerabilities, bugs, and maintainability concerns.

    

    Project mention: 7 Open-Source AI Code Review Tools Compared for 2026 | dev.to | 2026-10-05

    Repository: Nayjest/Gito

23. accessibility-agents

    21 3 423 9.4 JavaScript

    Accessibility review agents for Claude Code, GitHub Copilot, and Claude Desktop. Eleven specialists that enforce WCAG 2.2 AA compliance so AI coding tools stop generating inaccessible code.

    

    Project mention: The enforcement gap: why finding issues was never the problem | dev.to | 2026-04-08

    An open-source project called Community Access released 57 accessibility agents for Claude Code, GitHub Copilot, and Claude Desktop. They enforce WCAG 2.2 AA by intercepting every prompt and delegating to specialist reviewers.

24. awesome-ai-coding-techniques

    22 9 348 8.7

    Practical techniques for coding with ai assistants (Claude Code, Codex CLI, Cursor, GitHub Copilot, etc). Available in: English • Español • Deutsch • Français • 日本語

    

    Project mention: Practical AI Coding Techniques | news.ycombinator.com | 2026-03-21

25. metis

    23 2 333 9.2 TypeScript

    Metis is a coding agent that boosts AI/LLM coding performance by 50% (by Wholiver)

    

    Project mention: Better coding agents need more than better models | news.ycombinator.com | 2026-09-11

26. SaaSHub

    www.saashub.com sponsored

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

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• A note from our sponsor - SaaSHub
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  SaaSHub helps you find the best software and product alternatives Learn more →

Index

Sponsored

AppSignal knows why the f*#k it crashed.

Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.

www.appsignal.com