3,700 repositories keep their own agent configuration in the open: a CLAUDE.md, a rules file, instructions for Copilot, a skill the project runs on itself. These are not mods to install. They are worth reading for what they reveal — what a maintainer thinks an agent gets wrong.
Building agents8,442Claude Code6,875Data and AI3,584Git and workflow3,574Backend and APIs3,550Languages3,468Planning3,315Code review2,876Testing2,653DevOps and cloud2,462Writing and docs2,461Memory and context2,373Research2,315Frontend2,301Security2,167Project management1,944
All Claude Code32,436 Codex24,692 OpenCode23,614 GitHub Copilot3,700 Gemini CLI2,016 Cursor1,769 Windsurf202 Kiro113
| Project | Stars | Configures | Files | Always loaded |
|---|---|---|---|---|
| yuqizhang1228-blip/AI-color-system Generate a complete UI color system from brand emotional keywords · AI Skill for Cursor / | 7 | GitHub Copilot | 1 | 7,097 tok |
| nitzano/psst-ai Whisper instructions to your favorite AI Code Editor (Github Copilot, Cursor, Windsurf...) | 7 | GitHub Copilot | 1 | 654 tok |
| duthaho/copilot-instructions A comprehensive codebase of best practices, coding rules, and workflow automation for AI-a | 7 | GitHub Copilot | 10 | 12,840 tok |
| hugobatista/copilot-instructions-unicode-injection Proof of Concept (PoC) demonstrating prompt injection vulnerability in AI code assistants | 7 | GitHub Copilot | 1 | 1,064 tok |
| laststance/claude-plugin-dashboard npmjs.com Claude Plugin Dashboard CLI | 7 | GitHub Copilot | 1 | 1,059 tok |
| dhar174/custom_github_copilot_agent_builder A framework for building customized, optimized custom Github Copilot agents using custom r | 7 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 91 | 92,360 tok |
| 247arjun/mcp-grep An MCP Server wrapper around the grep CLI tool | 7 | GitHub Copilot | 1 | 211 tok |
| InfinitIQ-Tech/mcp-jira MCP Server for handling Jira issues | 7 | GitHub Copilot | 1 | 269 tok |
| slbug/claude-ruby-grape-rails Claude Code plugin for Ruby, Rails, Grape, PostgreSQL, Redis, and Sidekiq development | 7 | Claude Code, GitHub Copilot | 6 | 17,100 tok |
| wei/hn-mcp-server MCP Server for HackerNews using Algolia HackerNews API | 7 | GitHub Copilot | 1 | 613 tok |
| FanMnz/ibmi-mcp-server Model Context Protocol server for IBM i AS/400 source member management with AI assistant | 7 | GitHub Copilot | 1 | 2,124 tok |
| ZanzyTHEbar/mcp-memory-libsql-go 🧠 High-performance persistent memory system for Model Context Protocol (MCP) powered by l | 7 | GitHub Copilot | 1 | 2,602 tok |
| artvepa80/Agents-Hefesto hefestoai.narapallc.com Release-truth gate for AI-generated code: catches hallucinated APIs, missing imports and c | 7 | Claude Code, GitHub Copilot | 3 | 7,701 tok |
| chrisleekr/mcp-server-playground A playground for Model Context Protocol (MCP) server built with TypeScript and Streamable | 7 | Claude Code, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode | 5 | 2,633 tok |
| molavec/mcp-api-client | 7 | GitHub Copilot | 1 | 321 tok |
| WesleySmits/agent-skills 43 production-ready skills for AI coding agents. Works with Claude, GitHub Copilot, Cursor | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,432 tok |
| Wolfe-Jam/faf-mcp faf.one Persistent Project Context for Cursor, IDEs and VS Code — IANA-registered .faf format · 29 | 7 | Claude Code, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode | 5 | 2,473 tok |
| Devlaner/loomy loomy.devlane.dev Loomy is an open-source collaborative whiteboard. Create infinite boards, invite your team | 7 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 4,094 tok |
| lukasmetzler/agenteval Lint, benchmark, and score your AI coding instructions. Stop guessing, start measuring. | 7 | Claude Code, GitHub Copilot | 3 | 1,534 tok |
| gosha70/code-copilot-team gosha70.github.io Enforceable, provider-neutral harness for multi-agent AI coding: spec-driven workflow, cro | 7 | Claude Code, GitHub Copilot | 20 | 31,969 tok |
| aycanozarpaci/seo-pro-max-skill Production-grade SEO setup skill for AI coding agents (Claude Code, Cursor, Windsurf, Clin | 7 | GitHub Copilot | 1 | 20,549 tok |
| popoloni/non_deterministic_sw_eng Companion repository for Non-Deterministic Software Engineering book by Enrico Papalini | 7 | GitHub Copilot | 3 | 782 tok |
| rijuvashisht/Magneto landing-fsmpg96k6-rijuvashisht-1233s-projects.vercel.app The modern AI developer's platform - Build Applications bring any agent, any model, any sy | 7 | Claude Code, GitHub Copilot | 5 | 214 tok |
| php-opcua/laravel-opcua php-opcua.com OPC UA client integration for Laravel with Facade, named connections, and an optional pers | 7 | Claude Code, Codex, GitHub Copilot | 2 | 541 tok |
| shiiman/claude-code-plugins | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 9 | 4,554 tok |
| sumithr/sumo-qa pypi.org MCP server that brings senior-QA discipline to AI coding assistants — test planning, TDD, | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 9 | 2,650 tok |
| sandraschi/filesystem-mcp FastMCP 3.2.0+ server plus webapp for comprehensive file system operations, Git repository | 7 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode, Windsurf | 8 | 1,626 tok |
| clouatre-labs/aptu-coder aptu-coder: MCP server for AST analysis, call graphs, and code structure (tree-sitter) | 7 | Codex, GitHub Copilot, OpenCode | 5 | 3,090 tok |
| fakiho/neohive neohive.alionix.com One command. Your AI agents can talk to each other. The MCP collaboration layer for Claude | 7 | Claude Code, GitHub Copilot, Cursor, Gemini CLI | 19 | 5,336 tok |
| dotnetpower/infomesh 🕸️ Fully decentralized P2P search engine for LLMs — no API key, no billing, forever free. | 7 | GitHub Copilot | 1 | 16,254 tok |
| VMAFx/vmafx vmafx.dev VMAFx: perceptual video quality assessment (VMAF), GPU-accelerated and SIMD-tuned. CUDA, S | 7 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode, Windsurf | 53 | 11,533 tok |
| nvdigitalsolutions/mcp-ai-wpoos nvdigitalsolutions.com NV Digital Open Operator System (NV oOS) is an Object-Oriented AI Framework/Harness for Wo | 7 | Codex, GitHub Copilot, OpenCode | 2 | 11,098 tok |
| jahales/mcp-zoekt MCP server for Zoekt code search - enables AI assistants (GitHub Copilot, Claude) to searc | 7 | GitHub Copilot | 9 | — |
| joshsmithxrm/power-platform-developer-suite joshsmithxrm.github.io Pro-grade tooling for Power Platform developers | 7 | Claude Code, GitHub Copilot | 30 | 1,152 tok |
| archimedes-run/omniHarness archimedes.run OmniHarness is an open-source super agent harness that orchestrates sub-agents, persistent | 7 | Claude Code, Codex, GitHub Copilot | 12 | 1,717 tok |
| sabbour/agentweaver sabbour.me Run an AI agent on a task inside a sandboxed git worktree, stream every step live, and gat | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 59 | 1,009 tok |
| smaramwbc/statewave-web statewave.ai Official website for Statewave — open-source memory runtime for AI agents | 7 | Codex, GitHub Copilot, OpenCode | 2 | 1,633 tok |
| omkhar/vulnerability-validation-skill | 7 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 5 | 3,473 tok |
| nitrodevco/turbo-cloud | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 41,484 tok |
| mozilla/blender mozilla.github.io | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 4 | 319 tok |
| hakula139/nixos-config My Nix environment, including the agent harness used to build kiln and oxide-code with aut | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 7 | 819 tok |
| shamimfahad/adlc-toolkit A spec-driven pipeline that makes building with AI fast, accountable, and cumulative. | 7 | GitHub Copilot | 1 | 762 tok |
| MarimerLLC/csla-mcp An extensible MCP server for CSLA .NET syntax. | 7 | GitHub Copilot | 1 | 287 tok |
| intelligent-ears/pd-tools-mcp A Model Context Protocol (MCP) server that integrates [ProjectDiscovery](https://projectdi | 7 | GitHub Copilot | 1 | 130 tok |
| scorbo2/mcp-light An extremely lightweight MCP server implementation for Java applications. | 7 | Codex, GitHub Copilot, OpenCode | 2 | 1,386 tok |
| The-Utopia-Studio/skills the-utopia-studio.github.io Operator-grade AI skill marketplace for The Utopia Studio — 357 curated skills across GTM | 7 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 948 tok |
| rmyndharis/aimhooman aimhooman teaches coding agents Git etiquette—keeping agent memory, internal instructions, | 7 | Codex, GitHub Copilot, Gemini CLI, Kiro, OpenCode | 4 | 3,319 tok |
| dirnbauer/typo3-skills 61 Agent Skills that teach Claude Code, Codex, Cursor and Gemini how to build, upgrade and | 7 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode, Windsurf | 5 | 6,893 tok |
| sandraschi/dreame-mcp FastMCP 3.1 MCP server and webapp for the Dreame D20 Pro Plus robot vacuum. | 7 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode, Windsurf | 6 | 759 tok |
| natecostello/genechat-mcp MCP server for conversational personal genomics — query your whole-genome sequencing data | 7 | Claude Code, GitHub Copilot | 2 | 5,705 tok |