Awesome Agent Harness

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

The agent that grows with you

🌐 Make websites accessible for AI agents. Automate tasks online with ease.

Lightweight coding agent that runs in your terminal

Model Context Protocol Servers

🙌 OpenHands: AI-Driven Development

An open-source long-horizon SuperAgent harness that researches, codes, and creates. With the help of sandboxes, memories, tools, skill, subagents and message gateway, it handles different levels of tasks that could take minutes to hours.

AI coding assistant skill (Claude Code, Codex, OpenCode, Cursor, Gemini CLI, and more). Turn any folder of code, SQL schemas, R scripts, shell scripts, docs, papers, images, or videos into a queryable knowledge graph. App code + database schema + infrastructure in one graph.

A coding agent for open models like Kimi K3

A programming framework for agentic AI

Framework for orchestrating role-playing, autonomous AI agents. By fostering collaborative intelligence, CrewAI empowers agents to work together seamlessly, tackling complex tasks.

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]

an open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM

Build, run, and manage agent platforms.

Multi-harness agentic plugin marketplace for Claude Code, Codex CLI, Cursor, OpenCode, GitHub Copilot, and Gemini CLI

Build resilient agents.

ChatDev 2.0: Dev All through LLM-powered Multi-Agent Collaboration

Integrate cutting-edge LLM technology quickly and easily into your apps

A lightweight, powerful framework for multi-agent workflows

The open source AI engineering platform for agents, LLMs, and ML models. MLflow enables teams of all sizes to debug, evaluate, monitor, and optimize production-quality AI applications while controlling costs and managing access to models and data.

A powerful MCP toolkit for coding, providing semantic retrieval and editing capabilities - the IDE for your agent

The batteries-included agent harness.

🚀 The fast, Pythonic way to build MCP servers and clients.

Beads - A memory upgrade for your coding agent

The official Python SDK for Model Context Protocol servers and clients

Specification and documentation for Agent Skills

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

Open-source infrastructure for Computer-Use Agents. Sandboxes, SDKs, and benchmarks to train and evaluate AI agents that can control full desktops (macOS, Linux, Windows).

Open source agentic operating system

AI Agent Framework, the Pydantic way

Build reliable customer-facing AI agents with Parlant: an interaction control harness optimized for controlled, consistent, and predictable LLM interactions.

🐫 CAMEL: The first and the best multi-agent framework. Finding the Scaling Law of Agents. https://www.camel-ai.org

Supercharge Your LLM Application Evaluations 🚀

Eigent: The Open Source Cowork Desktop to Unlock Your Exceptional Productivity. Local and Free Alternative to Claude Cowork.

Personal memory across agents

A framework for few-shot evaluation of language models.

Open-source, secure environment with real-world tools for enterprise-grade agents.

Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, and security risks.

A framework for building, orchestrating and deploying AI agents and multi-agent workflows with support for Python and .NET.

TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation.

Secure, Fast, and Extensible Sandbox runtime for AI agents.

One portable memory layer for every AI agent: local-first, Markdown-native, user-owned, and self-evolving across apps, tools, and workflows.

Multi-Agent Harness for Production AI

🤗 ml-intern: an open-source ML engineer that reads papers, trains models, and ships ML models

Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.6, GPT-OSS, Llama, and more!

AI Observability & Evaluation

An Open-Source Asynchronous Coding Agent

Open source MCP Servers for AWS

Cybersecurity AI (CAI), the framework for AI Security

PraisonAI 🦞 — Hire a 24/7 AI Workforce. Stop writing boilerplate and start shipping autonomous self-improving agents that research, plan, code, and execute tasks. Deployed in 5 lines of code with built-in memory, RAG, and support for 100+ LLMs.