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 |
|---|---|---|---|---|
| yuanboP/frugal | 113 | Codex, GitHub Copilot, OpenCode | 2 | 986 tok |
| Prism-Shadow/agenthub One interface for 1,000+ LLMs, with zero-code switching and built-in observability. (GPT-6 | 113 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,349 tok |
| sportsdataverse/cfbfastR cfbfastr.sportsdataverse.org An R package to quickly obtain clean and tidy college football play by play data | 113 | Claude Code, GitHub Copilot | 4 | 9,772 tok |
| ProjectSidewalk/SidewalkWebpage projectsidewalk.org Project Sidewalk web page | 113 | Claude Code, GitHub Copilot | 16 | 5,187 tok |
| microsoft/PromptKit Agentic prompts are the most important code you're not engineering. PromptKit fixes that — | 113 | GitHub Copilot | 1 | 1,144 tok |
| mcbodge/MudMCP MCP server that provides AI assistants with comprehensive access to MudBlazor component do | 113 | Claude Code, GitHub Copilot | 2 | 2,252 tok |
| microsoft/Agent365-Samples | 113 | Claude Code, GitHub Copilot | 11 | 5,726 tok |
| kantorge/yaffa Yaffa is a personal finance web application, focusing on the support of long term financia | 113 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 8,349 tok |
| mac8005/xiaozhi-mcp-ha A Home Assistant Custom Integration (HACS) that connects Xiaozhi ESP32 AI chatbot to Home | 112 | GitHub Copilot | 1 | — |
| boussadjra/vuestrata vuestrata.vercel.app An opinionated Vue application foundation with enforced architecture, generators, and 12 d | 111 | Claude Code, Codex, GitHub Copilot, OpenCode | 51 | 6,275 tok |
| faramesh/faramesh-core docs.faramesh.dev Governance-as-Code for AI agents. Declarative constraints with deterministic enforcement. | 111 | GitHub Copilot | 1 | 210 tok |
| shuotao/REVIT_MCP_study LEARN HOW TO BUILD UP YOUR REVIT MCP | 110 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 79 | 13,111 tok |
| sillsdev/FieldWorks software.sil.org FieldWorks is a suite of software tools for language and cultural data, with support for c | 110 | Claude Code, Codex, GitHub Copilot, OpenCode | 96 | 21,156 tok |
| santhoshravindran7/Fabric-Analytics-MCP A Model Context Protocol (MCP) server that enables AI assistants to securely access and an | 110 | GitHub Copilot | 1 | — |
| shanselman/FlaUI-MCP MCP server for Windows desktop automation using FlaUI and UI Automation APIs | 110 | GitHub Copilot | 1 | 2,495 tok |
| tswistak/Battery-Monitor Battery Monitor for Android | 110 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 219 tok |
| csmar432/finai-research csmar432.github.io Evidence-first AI workflow for economic and financial research: literature → identificatio | 109 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 11,636 tok |
| raphaelmansuy/adk_training raphaelmansuy.github.io Google ADK Training Hub: Build Production-Ready Google AI Agents in Days, Not Months 🚀 T | 109 | GitHub Copilot | 1 | 5,643 tok |
| UmairBaig8/okf-generator OKF v0.1 knowledge bundle generator — Claude skill + OpenCode integration | 109 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 5 | 2,399 tok |
| Nayjest/ai-microcore A handy lib for smooth interaction with large language models (LLMs) and crafting AI apps. | 108 | Claude Code, Codex, GitHub Copilot, OpenCode | 4 | 1,486 tok |
| idoforgod/Dissertation-Simulator-AgenticWorkflow A doctoral dissertation research simulation system in which 58 AI agents collaborate acros | 108 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 12 | 39,470 tok |
| olibartfast/neuriplo-infer C++ app for computer vision inference, supporting multiple tasks and backends. | 107 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 3,211 tok |
| jyjeanne/okf-rs A fast, open-source Rust toolkit for generating, validating and serving Open Knowledge For | 107 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 434 tok |
| uscensusbureau/us-census-bureau-data-api-mcp census.gov The U.S. Census Bureau Data API MCP connects AI Assistants with official Census Bureau sta | 106 | GitHub Copilot | 1 | 2,107 tok |
| Ocean-Industries-Concept-Lab/openbridge-webcomponents openbridge.no OpenBridge design system implemented as Lit-based web components with support for all majo | 106 | Claude Code, Codex, GitHub Copilot, OpenCode | 29 | 99,569 tok |
| HoangYell/markdy-com markdy.com 🎬 Open-source animated architecture diagrams as code. Diagram-native DSL, 17 layout engin | 106 | Claude Code, GitHub Copilot, Cursor | 4 | 426 tok |
| celeritas-project/celeritas celeritas-project.github.io Celeritas is a new Monte Carlo transport code designed to accelerate scientific discovery | 105 | Claude Code, Codex, GitHub Copilot, OpenCode | 6 | 3,010 tok |
| mcpc-tech/mcpc Build agentic-MCP servers by composing existing MCP tools. | 105 | Claude Code, Codex, GitHub Copilot | 5 | 1,191 tok |
| debs-obrien/playwright-movies-app debs-obrien.github.io Playwright tests for a Movie App | 105 | Claude Code, Codex, GitHub Copilot, OpenCode | 16 | 891 tok |
| guigui42/mcp-vosdroits Serveur MCP pour Service Public Vos Droits | 105 | GitHub Copilot | 7 | 4,954 tok |
| nebrass/hve-video-director AI-powered video production pipeline for Claude Code, Github Copilot, Codex, Cursor, OpenC | 104 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 17,384 tok |
| dvcrn/mcp-server-devonthink | 104 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 7,482 tok |
| gviiisen/repo-context-ledger Agent Skill for AI context management: provides cross-window continuity for Codex context | 104 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 2,430 tok |
| muchengracedriver/awesome-requirements-writer Turn engineering intent into requirements that can be designed, reviewed, implemented, ver | 104 | GitHub Copilot | 2 | 791 tok |
| MRCalderon3D/everything-game-dev-code A universal scaffold for AI-assisted game development. 42 agents, 51 commands, 86 skills. | 104 | Claude Code, Codex, GitHub Copilot, Kiro, OpenCode | 12 | 3,371 tok |
| alfredoperez/speckit-companion speckit-companion.dev VS Code extension for spec-driven development — manage specs, workflows, and steering docs | 103 | Claude Code, Codex, GitHub Copilot, OpenCode | 63 | 3,763 tok |
| microsoft/Microsoft-AI-Decision-Framework Evidence-based decision framework for selecting the right Microsoft AI technology (M365 Co | 103 | Claude Code, GitHub Copilot | 3 | 5,340 tok |
| sous-chefs/postfix supermarket.chef.io Development repository for the postfix cookbook | 102 | Codex, GitHub Copilot, OpenCode | 2 | 1,311 tok |
| edbizarro/dotfiles :skull: dotfiles! managed by GNU stow | 102 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 2,926 tok |
| aspenkit/aspens npmjs.com Your CLAUDE.md stopped working at 200 lines. Generate scoped skill files from your import | 101 | Claude Code, Codex, GitHub Copilot, OpenCode | 34 | 3,436 tok |
| spica-engine/spica spicaengine.com Spica is a development engine to build fast & efficient applications. | 101 | Claude Code, GitHub Copilot | 20 | 10,975 tok |
| JKorf/Bitfinex.Net cryptoexchange.jkorf.dev C#/.NET client library for the Bitfinex.com cryptocurrency exchange REST and WebSocket API | 100 | Codex, GitHub Copilot, OpenCode | 2 | 2,411 tok |
| excalimate/excalimate excalimate.com Create keyframe animations from hand-drawn Excalidraw diagrams — timeline editor, camera a | 100 | Claude Code, GitHub Copilot | 2 | 794 tok |
| major7apps/pensyve Universal memory runtime for AI agents | 99 | Claude Code, Codex, GitHub Copilot, Kiro, OpenCode | 11 | 11,767 tok |
| mykpono/ultimate-seo-geo lab.mykpono.com The definitive SEO + GEO skill for Claude. Full site audits with scored findings, AI searc | 99 | Codex, GitHub Copilot, Gemini CLI, OpenCode | 3 | 8,683 tok |
| microsoft/cat-agent-skills Skills for modern agents in Copilot Studio | 99 | GitHub Copilot | 1 | 2,940 tok |
| microsoft/agentic-agile-template Agentic-Agile Development bridges Agile process values with the capabilities of AI coding | 98 | Claude Code, Codex, GitHub Copilot, OpenCode | 4 | 3,345 tok |
| attilaszasz/sdd-pilot sdd-pilot.szaszattila.com Replace chaotic AI code generation with a disciplined, spec-driven workflow. SDD Pilot enf | 97 | Claude Code, Codex, GitHub Copilot, OpenCode | 8 | 1,174 tok |
| spences10/mcpick Vendor-neutral MCP configuration manager — one CLI to add, toggle, and audit MCP servers a | 97 | GitHub Copilot | 1 | 224 tok |
| nirholas/crypto-vision cryptocurrency.cv The most comprehensive cryptocurrency API. Real-time prices, OHLCV, order books & market c | 97 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 2,269 tok |