44,996 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 agents8,544Claude Code6,892Git and workflow3,622Data and AI3,580Backend and APIs3,558Languages3,492Planning3,321Code review2,907Testing2,690DevOps and cloud2,489Writing and docs2,484Memory and context2,374Research2,321Frontend2,311Security2,178Project management1,971
All Claude Code32,539 Codex24,879 OpenCode23,799 GitHub Copilot3,723 Gemini CLI2,040 Cursor1,772 Windsurf202 Kiro116
| Project | Stars | Configures | Files | Always loaded |
|---|---|---|---|---|
| e-t-y-b/etyb-skills etyb.ai ETYB — your AI engineering team as one open-source skill (/etyb). 14 specialists, 9 always | 11 | Claude Code, Codex, OpenCode | 2 | 966 tok |
| langadventurellc/task-trellis-mcp npmjs.com Greatly improve how AI coding agents handle complex projects. Task Trellis helps track req | 11 | Claude Code | 4 | 1,009 tok |
| EthanYoQ/Skill-hub Reusable AI agent skills for Codex, Claude Code etc. — AI coding workflows, SKILL.md templ | 11 | Codex, OpenCode | 1 | 3,141 tok |
| edholofy/dojo.md dojo.md University for AI agents. 92 courses, 4400+ scenarios, any model via OpenRouter. Auto-trai | 11 | Claude Code | 11 | 3,168 tok |
| renky1025/agent-skills Production-grade Agent Skills library for Claude Code, Codex, Cursor & beyond —30 standard | 11 | Codex, OpenCode | 1 | 2,118 tok |
| footprintjs/hcifootprint footprintjs.github.io TypeScript action and journey graphs for agent-accessible web apps, with live availability | 11 | Claude Code | 1 | 4,567 tok |
| broomva/symphony broomva.tech Rust orchestration daemon for coding agents — polls Linear/GitHub/Markdown, creates isolat | 11 | Claude Code, Codex, OpenCode | 4 | 4,687 tok |
| tashian/tsm 🤫 Tiny Secrets Manager — lightweight agent secrets vault for macOS with Touch ID | 11 | Codex, OpenCode | 1 | 2,122 tok |
| redhuntlabs/wizard Build AI spells for what you do - a meta-builder that turns recurring tasks into reusable | 11 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 1,340 tok |
| antoinedc/MantaUI mantaui.com Open-source, self-hosted Claude Code and opencode client. Agents run in real > tmux on you | 11 | OpenCode | 1 | — |
| SawyerHan-AI/TideMind tidemind.ai A living second brain that connects everything you think with — your AI agents, your notes | 11 | Codex, OpenCode | 1 | 1,255 tok |
| EvilFreelancer/secs SECS (SECurity aSsistant) turns an AI coding agent (Claude Code, Cursor, Codex) into an au | 11 | Claude Code, Codex, OpenCode | 2 | 4,071 tok |
| colaberry/WorldOfTaxonomy worldoftaxonomy.com 1,000+ open taxonomy systems with 1.2M+ codes and 320K+ crosswalk edges. NAICS, ISIC, NACE | 11 | Claude Code | 1 | 16,396 tok |
| Open-Agent-Tools/open-stocks-mcp MCP Server for stock market data - Robinhood, Schwab APIs with multi-broker support | 11 | Claude Code, Codex, OpenCode | 2 | 4,707 tok |
| DollhouseMCP/collection A Free, Open Source, collection of personas, prompts, skills, memories, agents, and more. | 11 | Claude Code | 1 | 2,012 tok |
| memenow/persona-agent A Python-based API server for creating AI persona agents using Google A2A protocol and Mod | 11 | Claude Code, Codex, OpenCode | 2 | 4,170 tok |
| nyo16/conduit_mcp Elixir implementation of the Model Context Protocol (MCP) — build servers to expose tools, | 11 | Claude Code | 1 | 4,570 tok |
| crunchtools/mcp-trentina MCP gateway between AI agents and their tools, the web and Matrix: three-layer prompt-inje | 11 | Claude Code | 2 | 10,610 tok |
| sharozdawa/ai-visibility Track your brand visibility across ChatGPT, Perplexity, Claude, and Gemini. Open source al | 11 | Claude Code | 1 | — |
| jamditis/mooc-starter-kit mooc.amditis.tech Starter repo for Advanced Prompt Engineering for Journalists — a Knight Center MOOC on AI | 11 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 1,497 tok |
| sebastienrousseau/noyalib sebastienrousseau.github.io A YAML 1.2 parser and serialiser for Rust: zero unsafe, full serde integration, lossless C | 11 | Codex, OpenCode | 1 | 485 tok |
| Aureliolo/synthorg synthorg.io SynthOrg is a synthetic organisation: it staffs the roles, splits the work into jobs that | 11 | Claude Code, Codex, OpenCode | 64 | 28,656 tok |
| pshkv/sint-protocol Runtime authorization & audit layer for physical AI — T0–T3 tiers, capability tokens, Ed25 | 11 | Claude Code, Codex, OpenCode | 2 | 4,406 tok |
| pablo-albaladejo/kaiord kaiord.com Open-source, local-first training platform: calendar, AI assistant, Garmin & WHOOP sync — | 11 | Claude Code, Codex, OpenCode | 33 | 11,873 tok |
| Exponential-OS/prompt-engineering-in-action thewhyman.blog Co-Dialectic: catch your AI agreeing with you to please you, not because you're right. Syc | 11 | Claude Code, Gemini CLI | 4 | 1,320 tok |
| cosen1024/awesome-academic-skills A curated, machine-validated catalog of public Agent Skills for academic research workflow | 11 | Codex, OpenCode | 1 | 474 tok |
| prasad-vennam/Awesome-Android-AI-Agent-Skills | 11 | GitHub Copilot | 1 | 2,030 tok |
| jlckfb/openkits-skills A collection of Lichuang development board AI skills. Enables Claude Code, Codex, Trae, Cu | 11 | Claude Code | 1 | 722 tok |
| xinghang-ee-cs/dev-runtime-skill AI coding assistant skills that structure the full development lifecycle into planning → i | 11 | Codex, OpenCode | 2 | 3,750 tok |
| felipepg22/FPGSkills Portable agents and skills for AI coding tools. | 11 | Codex, OpenCode | 1 | 779 tok |
| 0xNyk/unmachined Anti-AI-slop agent skill: makes text read written and UI look made, not generated. Determi | 11 | Codex, OpenCode | 1 | 606 tok |
| NimbleBrainInc/upjack upjack.dev Declarative AI-native application framework — schema-driven entities, Markdown skills, MCP | 11 | Claude Code | 1 | 2,010 tok |
| marianfoo/sap-api-policy-skill Agent skill (npx skills) for evidence-based SAP API Policy alignment assessments — sourced | 11 | Claude Code, Codex, OpenCode | 2 | 1,357 tok |
| MSApps-Mobile/claude-plugins msapps.mobi free, open-source plugins for Claude Code & Cowork — Google Drive, WhatsApp, YouTube, Word | 11 | Claude Code | 1 | 556 tok |
| mayor-modder/Cities2-MCP MCP and agent skills for Cities: Skylines II knowledge and mod project workflows. | 11 | Codex, OpenCode | 1 | 1,169 tok |
| keugenek/krea-mcp krea.ai MCP server for Krea.ai - Generate stunning AI images & videos with Flux, Hailuo, Runway, K | 11 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 187 tok |
| h3rb3rn/moe-sovereign moe-sovereign.org Self-hosted Compound AI System for sovereign environments. Features token-saving complexit | 11 | Claude Code, Codex, OpenCode | 2 | 2,278 tok |
| bonnard-data/mcp-charts bonnard.dev Add agent-ready, interactive charts to your MCP server in a few lines. | 11 | Claude Code | 1 | 1,164 tok |
| jeremylongshore/plugins-nixtla jeremylongshore.github.io Nixtla time series forecasting plugins for Claude Code. StatsForecast, MLForecast, and Neu | 11 | Claude Code | 2 | — |
| mordor-forge/gemini-media-mcp Unified Go MCP server for AI media generation via Google Gemini API and Vertex AI | 11 | Codex, OpenCode | 1 | 2,089 tok |
| zzxCoding/Flydb flydb.zzxcoding.dev A Schema versioning migration tool for JDBC databases: a zero-dependency Java 8 core, buil | 11 | Codex, OpenCode | 1 | 1,778 tok |
| mpsuesser/effect-claudecode npmjs.com Effect v4 bindings for Claude Code's plugin primitives — hooks, skills, settings, MCP serv | 11 | Claude Code, Codex, OpenCode | 1 | 2,472 tok |
| dzianisv/opencode-plugins Reflection/judge layer for OpenCode & Claude Code — catches premature stops, enforces work | 11 | Codex, OpenCode | 1 | 1,626 tok |
| cdeust/ai-prd-generator-plugin AI PRD Generator — Claude Code & Cowork plugin for enterprise PRD generation with verifica | 11 | Claude Code | 1 | 299 tok |
| hjsh200219/korea-public-data-mcp A Korean public data MCP (Model Context Protocol) server. Integrates APIs from the Ministr | 11 | Claude Code, Codex, Cursor, OpenCode | 3 | 3,257 tok |
| RS-Nocsi/codex-cua-mcp MCP server wrapping Codex Computer Use — bring Codex Computer Use to any MCP-compatible ag | 11 | Claude Code | 1 | 928 tok |
| omniwaifu/taskwarrior-mcp MCP Server for TaskWarrior / GTD Tools | 11 | Cursor | 1 | — |
| seejux/waha-whatsapp-mcp | 11 | Claude Code | 1 | 1,693 tok |
| exiao/pm-skills Skills for the whole product R&D process: strategy, UXR, PM, design, QA, launch. For Claud | 11 | Codex, OpenCode | 1 | 845 tok |
| sinch/skills sinch.com AI agent skills for Sinch communication APIs. Get expert guidance on getting started, best | 11 | Claude Code, Codex, OpenCode | 2 | 2,630 tok |