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.
#1langchain-ai/langchain
The agent engineering platform
#2NousResearch/hermes-agent
The agent that grows with you
#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.
#13davila7/claude-code-templates
CLI tool for configuring and monitoring Claude Code
#14dyad-sh/dyad
Local, open-source AI app builder for power users ✨ v0 / Lovable / Replit / Bolt alternative 🌟 Star if you like it!
#15stackblitz/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
#16vxcontrol/pentagi
✨ Fully autonomous AI Agents system capable of performing complex penetration testing tasks
#17aden-hive/hive
Outcome driven agent development framework that evolves
#18rtk-ai/rtk
CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies
#19xonsh/xonsh
🐚 Python-powered shell. Full-featured, cross-platform and AI-friendly.
#20friuns2/BlackFriday-GPTs-Prompts
List of free GPTs that doesn't require plus subscription
#21travisvn/awesome-claude-skills
A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows — particularly Claude Code
#22Arize-ai/phoenix
AI Observability & Evaluation
#23osaurus-ai/osaurus
Own your AI. The native macOS harness for AI agents -- any model, persistent memory, autonomous execution, cryptographic identity. Built in Swift. Fully offline. Open source.
#24gptme/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!
#25mnfst/awesome-free-llm-apis
Permanent Free LLM API List (API Keys) 😎🔑
#26plastic-labs/honcho
Memory library for building stateful agents
#27OpenWhispr/openwhispr
Voice-to-text dictation app with local (Nvidia Parakeet/Whisper) and cloud models (BYOK). Privacy-first and available cross-platform.
#28kyegomez/OpenMythos
A theoretical reconstruction of the Claude Mythos architecture, built from first principles using the available research literature.
#29MCPJam/inspector
Development platform to debug, chat, inspect, and evaluate MCP servers, MCP apps, and ChatGPT apps.
#30foryourhealth111-pixel/Vibe-Skills
VibeSkills is a new kind of super skill that organizes 340+ governed skills into one stable AI work system.
#31chopratejas/headroom
The Context Optimization Layer for LLM Applications
#32waybarrios/vllm-mlx
OpenAI and Anthropic compatible server for Apple Silicon. Run LLMs and vision-language models (Llama, Qwen-VL, LLaVA) with continuous batching, MCP tool calling, and multimodal support. Native MLX backend, 400+ tok/s. Works with Claude Code.
#33jjang-ai/mlxstudio
MLX Studio - Home of JANG_Q - Image Gen/Edit + Chat/Code All in one - + OpenClaw (Anthropic API)
#34tak-bro/aicommit2
A Reactive CLI that generates commit messages for Git and Jujutsu with Ollama, ChatGPT, Gemini, Claude, Mistral and other AI
#35nodetool-ai/nodetool
Visual Builder for AI Workflows and Agents
#36cloveric/cc-telegram-bridge
Real Claude Code & Codex CLI on Telegram — runs their native harness directly, no reimplemented API wrappers. Sessions, memory, tools, all built-in. Multi-bot Agent Bus, resume local sessions on your phone, voice input, file delivery, streaming, per-bot personality & budget. The most powerful way to run AI agents from anywhere.
#37tombelieber/claude-view
10 Claude sessions running. What are they doing? Live dashboard — monitor, cost tracking, search, sub-agent visibility.