Awesome Agent Harness

SkillOpt is a text-space optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits, validation-gated updates, and deployable best_skill.md artifacts.

A comprehensive collection of Agent Skills for context engineering, multi-agent architectures, and production agent systems. Use when building, optimizing, or debugging agent systems that require effective context management.

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

Memori is agent-native memory infrastructure. A LLM-agnostic layer that turns agent execution and conversation into structured, persistent state for production systems. Built for enterprise, Memori works with the data infrastructure you already run, no rip-and-replace, and deploys across managed cloud, single-tenant cloud, VPC, and on-premises.

MCP Toolbox for Databases is an open source MCP server for databases.

"DeepCode: Open Agentic Coding (Agent Harness & Loop Engineering & Multi-Agent Orchestration)"

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

"OpenHarness: Open Agent Harness with a Built-in Personal Agent--Ohmo!"

Eigent: The Open Source Cowork Desktop - Local and Free Alternative to Claude Cowork and Codex

Multiplayer agent harness for work.

Autonomous multi-session AI coding

Personal memory across agents

The best agent harness.

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

Use Claude Code, OpenCode, Cursor CLI, and Codex on mobile and web with CloudCLI (aka Claude Code UI). CloudCLI is a free open source webui/GUI that helps you manage your Claude Code session and projects remotely.

Superset is an agentic IDE to orchestrate 100+ coding agents in parallel. Run any agent with your own subscription.

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

The official TypeScript SDK for Model Context Protocol servers and clients

The all-in-one, open-source backend platform for agentic coding. InsForge gives your coding agent database, auth, storage, compute, hosting, and AI gateway to ship full-stack apps end-to-end.

A blazing fast AI Gateway with integrated guardrails. Route to 1,600+ LLMs, 50+ AI Guardrails with 1 fast & friendly API.

Run and supervise teams of coding agents from planning to merge. Any harness (Claude code, codex, +25 more). Desktop, web, mobile, and cloud agents.

IronClaw is an Agent OS focused on privacy, security and extensibility

Instant, Concurrent, Secure & Lightweight Sandbox for AI Agents.

AI Observability & Evaluation

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

Self-evolving memory OS for LLM & AI Agents: ultra-persistent memory, hybrid-retrieval, and cross-task skill reuse, with 35.24% token savings and DeepSeek Harness support.

Open-source agentic workspace enterprises can make their own. Connect the systems you already run — 100+ integrations, MCP, chat tools, apps, browser, local files — with shared memory. Any agent (Claude Code, Codex), any model, or BYOK. Set up in clicks, not months. Local-first: your data never leaves your machines.

Multi-Agent Harness for Production AI

Visual testing tool for MCP servers

AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework

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!

The fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.

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

An Open-Source Asynchronous Coding Agent

Multi-platform SDK for integrating GitHub Copilot Agent into apps and services

Omnigent is an open-source AI agent framework and meta-harness: orchestrate Claude Code, Codex, Cursor, Pi, and custom agents — swap harnesses without rewriting, enforce policies and sandboxing, and collaborate in real time from any device.

Open source MCP Servers for AWS

🤖 AI Gateway | AI Native API Gateway

Specification and documentation for the Model Context Protocol

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.

Build an agent harness and control it end-to-end. Open-source SDK for production AI agents in Python & TypeScript - any model, any cloud.

Build effective agents using Model Context Protocol and simple workflow patterns

OpenShell is the safe, private runtime for autonomous AI agents.

The sandbox agent framework.

Manage multiple AI terminal agents like Claude Code, Codex, OpenCode, and Amp.

🧱 Easy fast local-first microVM runtime and library

Orchestrate sandboxed coding agents in TypeScript with sandcastle.run()

Flexible and powerful framework for managing multiple AI agents and handling complex conversations

A local multi-agent harness that works with your existing Claude Code, Codex subscriptions, allows you to run an office of agents

Open-source observability for your GenAI or LLM application, based on OpenTelemetry