Best Open Source anthropic Libraries
A curated list of the most popular GitHub repositories tagged with anthropic. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.
#1NousResearch/hermes-agent
The agent that grows with you
#2langchain-ai/langchain
The agent engineering platform
#3affaan-m/everything-claude-code
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
#4Aider-AI/aider
aider is AI pair programming in your terminal
#5code-yeongyu/oh-my-openagent
omo; the best agent harness - previously oh-my-opencode
#6BerriAI/litellm
Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]
#7thedotmack/claude-mem
A Claude Code plugin that automatically captures everything Claude does during your coding sessions, compresses it with AI (using Claude's agent-sdk), and injects relevant context back into future sessions.
#8danny-avila/LibreChat
Enhanced ChatGPT Clone: Features Agents, MCP, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, Mistral, OpenRouter, Vertex AI, Gemini, Artifacts, AI model switching, message search, Code Interpreter, langchain, DALL-E-3, OpenAPI Actions, Functions, Secure Multi-User Auth, Presets, open-source for self-hosting. Active.
#9asgeirtj/system_prompts_leaks
Collection of extracted System Prompts from popular chatbots like ChatGPT, Claude & Gemini
#10wshobson/agents
Intelligent automation and multi-agent orchestration for Claude Code
#11hesreallyhim/awesome-claude-code
A curated list of awesome skills, hooks, slash-commands, agent orchestrators, applications, and plugins for Claude Code by Anthropic
#12simstudioai/sim
Build, deploy, and orchestrate AI agents. Sim is the central intelligence layer for your AI workforce.
#13dyad-sh/dyad
Local, open-source AI app builder for power users ✨ v0 / Lovable / Replit / Bolt alternative 🌟 Star if you like it!
#14stackblitz/bolt.new
Prompt, run, edit, and deploy full-stack web applications. -- bolt.new -- Help Center: https://support.bolt.new/ -- Community Support: https://discord.com/invite/stackblitz
#15vxcontrol/pentagi
✨ Fully autonomous AI Agents system capable of performing complex penetration testing tasks
#16aden-hive/hive
Outcome driven agent development framework that evolves
#17rtk-ai/rtk
CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies
#18xonsh/xonsh
🐚 Python-powered shell. Full-featured, cross-platform and AI-friendly.
#19friuns2/BlackFriday-GPTs-Prompts
List of free GPTs that doesn't require plus subscription
#20travisvn/awesome-claude-skills
A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows — particularly Claude Code
#21Arize-ai/phoenix
AI Observability & Evaluation
#22gptme/gptme
Your agent in your terminal, equipped with local tools: writes code, uses the terminal, browses the web. Make your own persistent autonomous agent on top!
#23modu-ai/moai-adk
SPEC-First Agentic Development Kit for Claude Code — 24 AI agents + 52 skills with TDD/DDD quality gates, 16-language projects, 4-language docs. Go CLI, zero deps.
#24withkynam/vibecode-pro-max-kit
Your AI forgets. This remembers. Spec-driven coding harness for vibecoders, product owners, CEOs and real builders — self-improving context memory, 12 agents, 32 skills. Kills context rot, ships features, not spaghetti. Claude Code & Codex. Any stack. 30 seconds
#25toby-bridges/api-relay-audit
Local security audit for AI API relays and LLM proxies: detects prompt injection, model substitution, tool-call rewriting, SSE anomalies, error leakage, and Web3 wallet risks.
#26mensfeld/code-on-incus
Give each AI agent its own isolated machine with root, Docker, and systemd. Active defense detects and stops threats automatically..
#27Klotzkette/claude-fuer-deutsches-recht
⚠️ Experimentelle Skill-Sammlung für deutsches Recht (Arbeits-, Gesellschafts-, Insolvenz-, Datenschutz-, Prozessrecht u.a.) – inzwischen verbessert und im Alltag getestet, aber weiterhin Experiment. Bitte selber ausprobieren, Issues/PRs willkommen! Keine Rechtsberatung. Mandatsgeheimnis (§§ 203/204 StGB, § 43e BRAO), DSGVO, US-Transfer, KI-VO & Co
#28cloveric/tarocub
TaroCub runs Codex, Claude Code, and Antigravity locally, then lets you control them from Telegram and Feishu/Lark.
#29arabicapp/everything-claude-code
🚀 Build powerful agents and configurations with the complete collection of Claude Code from an Anthropic hackathon winner, refined over 10+ months.