Most starred
The 20 AI agent harnesses with the most GitHub stars. The established end of the catalog.
| # | Project | Stars | Δ 7d | Δ 30d | 90d trend | Age | Lang | Last push |
|---|---|---|---|---|---|---|---|---|
| 1 | morluto/rea Reverse engineer anything with agents, from app behavior down to native binaries. | 342.4k | +158,122 | — | 6 mo | TypeScript | 11m ago | |
| 2 | affaan-m/ECC The agent harness performance optimization system. Skills, instincts, memory, security, and research-first dev… | 284.4k | +6,236 | +21,215 | 9 mo | JavaScript | 7h ago | |
| 3 | NousResearch/hermes-agent The agent that grows with you | 255.4k | +2,115 | +8,102 | 1 yr | Python | 13m ago | |
| 4 | deepseek-ai/deepseek-harness DeepSeek Harness: Everything is a Plugin. | 255.2k | +6,494 | +24,419 | 2 mo | TypeScript | 3d ago | |
| 5 | anomalyco/opencode The open source coding agent. | 218.3k | +5,241 | +9,573 | 1 yr | TypeScript | 13m ago | |
| 6 | n8n-io/n8n Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code,… | 208.1k | +922 | +2,684 | 7 yrs | TypeScript | 11m ago | |
| 7 | firecrawl/firecrawl Supercharge your AI agents with data from the web and beyond. Building the library for superintelligence. 🔥 | 193.2k | +2,223 | +10,813 | 2 yrs | TypeScript | 29m ago | |
| 8 | Significant-Gravitas/AutoGPT AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the too… | 187.7k | +122 | +217 | 3 yrs | Python | 12m ago | |
| 9 | langgenius/dify Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. De… | 159.0k | +655 | +2,444 | 3 yrs | Python | 12m ago | |
| 10 | langflow-ai/langflow Langflow is a powerful tool for building and deploying AI-powered agents and workflows. | 155.9k | +274 | +832 | 3 yrs | Python | 3h ago | |
| 11 | anthropics/claude-code Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you co… | 152.9k | +2,332 | +5,991 | 1 yr | TypeScript | 12h ago | |
| 12 | langchain-ai/langchain The agent engineering platform. | 148.1k | +377 | +1,409 | 4 yrs | Python | 53m ago | |
| 13 | openai/codex Lightweight coding agent that runs in your terminal | 130.1k | +1,086 | +4,618 | 1 yr | Rust | 25m ago | |
| 14 | Graphify-Labs/graphify Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphif… | 129.5k | +3,456 | +9,730 | 6 mo | Python | 3d ago | |
| 15 | browser-use/browser-use Open-source Python library for AI browser agents, plus Browser Use Cloud: stealth browsers and a hosted agent… | 118.6k | +789 | +3,164 | 1 yr | Python | 5h ago | |
| 16 | earendil-works/pi AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI | 116.6k | +1,804 | +9,018 | 1 yr | TypeScript | 16m ago | |
| 17 | JuliusBrussee/caveman 🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens b… | 113.8k | +2,423 | +6,881 | 6 mo | Go | 1d ago | |
| 18 | google-gemini/gemini-cli An open-source AI agent that brings the power of Gemini directly into your terminal. | 107.5k | +152 | +368 | 1 yr | TypeScript | 9h ago | |
| 19 | paperclipai/paperclip The open-source app everyone uses to manage agents at work | 105.0k | — | — | 7 mo | TypeScript | 17m ago | |
| 20 | nexu-io/open-design The 1st Collaborative AI Design Agent Workspace. Local-first and open source. Create motion, prototypes, websi… | 102.7k | +1,809 | +5,485 | 5 mo | TypeScript | 15m ago |
Methodology
We find candidates through GitHub Search (agent-related topics and keywords, plus a radar for repos younger than 90 days), then snapshot every repo in the pool once a day via the GraphQL API. For new entries we rebuild star history from sampled stargazer timestamps.
Fast growing ranks by (2 × stars_7d + stars_30d) × youth_bonus. Last week counts double, and young repos get a boost so giants don't bury newcomers. The other rankings sort by stars, by repo age, and by 👍 reactions on open issues.
Exclusions:archived repositories, inactive repos (no pushes in 60 days), awesome-lists, and prompt collections. We define a “harness” as a tool or framework that orchestrates an LLM to complete tasks — tool calling, context management, agentic loops. Models themselves, API wrappers, and prompt libraries do not qualify.