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 |
|---|---|---|---|---|
| shigechika/mcp-stdio Bidirectional stdio ↔ HTTP gateway for MCP servers — connect clients to remote servers or | 9 | Claude Code, GitHub Copilot | 2 | 8,253 tok |
| franklesniak/copilot-repo-template Reusable template for AI-assisted repositories with shared coding-agent instructions, CI v | 9 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 13 | 152,641 tok |
| yiouli/pixie-qa Agent skill for AI agent development | 9 | Claude Code, GitHub Copilot | 2 | 7,490 tok |
| AlirezaSoltaniJazi/Skillnir Skillnir generates, manages, and injects domain-specific AI skills into the configuration | 9 | GitHub Copilot | 1 | 3 tok |
| spuentesp/lain High-performance MCP server for AI coding agents: persistent knowledge graph, blast radius | 9 | Codex, GitHub Copilot, OpenCode | 2 | 2,373 tok |
| Maxim-Mazurok/teams-api AI-native Microsoft Teams integration — read conversations, send messages, and manage memb | 9 | GitHub Copilot | 2 | 2,004 tok |
| DeHor-Labs/transcreve-ai Multimodal video dossiers for agents: transcripts, frames, OCR, evidence, and RAG-ready kn | 9 | Claude Code, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode, Windsurf | 7 | 2,966 tok |
| 99x-Projects/ai-dlc-base Standard rule set builder for projects to govern the AI-DLC workflow at 99x | 9 | Claude Code, GitHub Copilot | 2 | 1,004 tok |
| flitzrrr/frontend-design-skills Opinionated web design skills from curated sources — one install, every major AI coding to | 9 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 4 | 1,588 tok |
| SafetyMP/Autonomous-EHS-Management autonomous-ehs-management.vercel.app Self-hosted incident to verified CAPA, with a TRIR that uses annual hours when the month g | 9 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 24 | 2,203 tok |
| lzehrung/codegraph CLI, MCP and TS library that turns source code into a map of files, symbols, references, a | 9 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 3,270 tok |
| xsolla/xsolla-ai-kit xsolla.com Xsolla agent skills for AI coding tools — Claude Code, Copilot, Codex CLI, Windsurf and mo | 9 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 3,257 tok |
| yehezkieldio/firefly npmjs.com Automation release management CLI for semantic versioning, changelog generation, and GitHu | 9 | Codex, GitHub Copilot, OpenCode | 2 | 834 tok |
| eco-emma/emma_envdata Environmental data processing for www.emma.eco | 9 | Claude Code, GitHub Copilot | 12 | 859 tok |
| Aledon8/OpenLeukemia openleukemia.com OpenLeukemia is a patient-centered platform for organizing leukemia-related medical data, | 9 | Claude Code, Codex, GitHub Copilot, OpenCode | 9 | 1,924 tok |
| hmcts/tcoe-playwright-example A sample repository for teams to use as a guide to set up Playwright in their own projects | 9 | GitHub Copilot | 1 | 4,004 tok |
| ShowTrak/ShowTrakServer showtrak.co.uk Open Source LAN Monitoring | 9 | GitHub Copilot | 1 | 862 tok |
| ianlintner/rust-oauth2-server ianlintner.github.io Rust OAuth2 Server with Social Logins with observability. Typesafe and Actor System. | 9 | Claude Code, GitHub Copilot | 10 | 5,503 tok |
| SamErde/TheCleaners day3bits.com PowerShell module to clean the loose ends from your Windows Servers. | 9 | Codex, GitHub Copilot, OpenCode | 2 | 1,470 tok |
| kellerza/hass-addons Home Assistant add-ons (Qwikswitch, Sunsynk, ESP, others) | 9 | GitHub Copilot | 1 | 517 tok |
| dryvist/ai-assistant-instructions A comprehensive, vendor-agnostic framework for consistent AI-assisted development workflow | 8 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 1,006 tok |
| ukorvl/web-of-flaws A structured library of web security flaws for humans and coding agents with vulnerable ex | 8 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 923 tok |
| Andes-Software-Solutions/Andes.Extensions.AI nuget.org Composable Microsoft.Extensions.AI IChatClient middlewares for .NET — tool-call tracking w | 8 | Claude Code, Codex, GitHub Copilot, OpenCode | 4 | 5,338 tok |
| armalite/data-product-hub Composite MCP server that aggregates data product insights from multiple platforms (dbt, G | 8 | Claude Code, GitHub Copilot | 2 | 2,220 tok |
| ShaftHQ/SHAFT_MCP Archived: SHAFT MCP moved to the SHAFT_ENGINE monorepo. | 8 | GitHub Copilot | 1 | 3,288 tok |
| YuliiaKovalova/dotnet-template-mcp MCP server wrapping the .NET Template Engine for AI-driven template discovery, inspection, | 8 | Codex, GitHub Copilot, OpenCode | 2 | 1,696 tok |
| Adit-999/gitlab-mcp A MCP (Model Context Protocol) server for interacting with GitLab API. | 8 | GitHub Copilot | 1 | 903 tok |
| hariharapanigrahy/layerkit Evidence-first AI agent workbench for vendor API integrate & contract heal — real producti | 8 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,066 tok |
| akshatnerella/plumber Root cause first. An idiot admires complexity, a genius admires simplicity. | 8 | Codex, GitHub Copilot, OpenCode | 2 | 774 tok |
| elbruno/ElBruno.ModelContextProtocol Semantic routing for MCP tools - .NET library that indexes MCP tool definitions and return | 8 | Claude Code, GitHub Copilot | 2 | 2,648 tok |
| oculus-samples/Unreal-MetaXRAudioSDK This project contains Unreal samples for Meta's Presence Platform Audio SDK. The Oculus SD | 8 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 6 | 1,055 tok |
| signnow/sn-mcp-server signnow.com Official SignNow MCP server for AI agents. Access e-signature workflows, templates, embedd | 8 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 3,462 tok |
| commerce-docs/microsite-commerce-storefront experienceleague.adobe.com Source docs for the Adobe Commerce Storefront documentation | 8 | Claude Code, GitHub Copilot | 2 | 1,314 tok |
| ozgurkarahan/ai-agent-memory Persistent memory for AI coding agents — Karpathy LLM Wiki pattern for GitHub Copilot, Cla | 8 | Claude Code, Codex, GitHub Copilot, OpenCode | 21 | 11,413 tok |
| commjoen/generated-game-experiment commjoen.github.io Private experiment to create a game with cursor | 8 | GitHub Copilot | 1 | 1,418 tok |
| oculus-samples/Unity-CompositorLayers The Compositor Layers demo for Unity shows how to ingest our Compositor Layers API, and co | 8 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 6 | 976 tok |
| geniro-io/geniro-claude-harness | 8 | Claude Code, GitHub Copilot | 8 | 2,419 tok |
| forthends/clockwork Clockwork (机关术) — The Governance Layer for AI Agents. | 8 | Codex, GitHub Copilot, OpenCode | 2 | 1,680 tok |
| peva3/anchor Anchor — the production-grade AGENTS.md template for AI coding agents. 51 sections of batt | 8 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 8,726 tok |
| shir-bruchim/agent-runtime-kit 🤖 Universal runtime configuration for AI coding agents (Claude Code & Cursor). Auto-detec | 8 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 5 | 2,432 tok |
| nutdnuy/sec-opendata-th Python client + Claude Code plugin for the Thai SEC OpenAPI (api.sec.or.th): fund factshee | 8 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 1,912 tok |
| Eliyce/paqad-ai paqad.ai Spec-driven development framework — AI agents that think before they type | 8 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode, Windsurf | 22 | 640 tok |
| radu103/github-copilot-vscode-sap-dev-instructions | 8 | GitHub Copilot | 5 | 1,955 tok |
| yldgio/vibe-vscode VS Code development workspace with GitHub Copilot instructions, coding guidelines, and pro | 8 | Codex, GitHub Copilot, OpenCode | 10 | 9,149 tok |
| TechWatching/copilot-goodies A collection of custom instructions and prompts to enhance your GitHub Copilot experience | 8 | GitHub Copilot | 1 | 551 tok |
| pietermyb/mcp-pdf-reader PDF Reader MCP Server for VS Code | 8 | GitHub Copilot | 1 | 259 tok |
| sandersouza/grafanaFastMCP link.mercadopago.com.br Python FastMCP Server / CLI ( OpenAI Compliance ), com suporte a transportes Server-Sent E | 8 | GitHub Copilot | 1 | 401 tok |
| Flux-Point-Studios/unreal-mcp Unreal Engine MCP (Model Context Protocol) server for AI-powered automation | 8 | Codex, GitHub Copilot, Gemini CLI, OpenCode | 3 | 2,743 tok |
| littlebearapps/pitchdocs littlebearapps.com Turn any codebase into professional, marketing-ready GitHub documentation — powered by AI | 8 | Claude Code, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode | 5 | 6,155 tok |
| maxzrff/KnowledgeMCP Model Context Protocol (MCP) server for local vector storage & semantic search (ChromaDB, | 8 | GitHub Copilot | 1 | 153 tok |