Awesome Agent Harness

Open source agentic operating system

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

The LLM Evaluation Framework

"DeepCode: Open Agentic Coding (Paper2Code & Text2Web & Text2Backend)"

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

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

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

Harness engineering beginner tutorial, from 0 to 1

Autonomous multi-session AI coding

Orchestrate multiple coding agents from desktop and mobile

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.

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.

Code Editor for the AI Agents Era - Run an army of Claude Code, Codex, etc. on your machine

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

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

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

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

Multi-Agent Harness for Production AI

AI Observability & Evaluation

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

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

Visual testing tool for MCP servers

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

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

An Open-Source Asynchronous Coding Agent

Open source MCP Servers for AWS

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.

Build effective agents using Model Context Protocol and simple workflow patterns

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

The sandbox agent framework.

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

Agentic orchestrator for parallel coding agents — plans tasks, spawns agents, and autonomously handles CI fixes, merge conflicts, and code reviews.

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

This is a simple demonstration of more advanced, agentic patterns built on top of the Realtime API.

Plano is an AI-native proxy server and data plane for agentic apps. Smart LLM routing, observability, agent orchestration, and guardrails so you stay focused on your agents core logic.

TypeScript AI agent orchestration framework with dynamic workflows. Describe the goal, not the graph: a coordinator plans the task DAG at runtime and runs it on any LLM (Claude, ChatGPT, Gemini, DeepSeek, or local models).

可私有部署的多租户知识智能体平台：统一 RAG、知识图谱、多智能体、MCP/Skills、沙盒与权限管理。Self-hosted knowledge agent platform for RAG, knowledge graphs and multi-agent workflows.

Demo of a customer service use case implemented with the OpenAI Agents SDK

🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓

Python SDK for AI agent monitoring, LLM cost tracking, benchmarking, and more. Integrates with most LLMs and agent frameworks including CrewAI, Agno, OpenAI Agents SDK, Langchain, Autogen, AG2, and CamelAI

Nexent is a zero-code platform for auto-generating production-grade AI agents using Harness Engineering principles — unified tools, skills, memory, and orchestration with built-in constraints, feedback loops, and control planes.

Next-generation AI Agent Optimization Platform: Cozeloop addresses challenges in AI agent development by providing full-lifecycle management capabilities from development, debugging, and evaluation to monitoring.

Orchestration layer for coding agents (Claude Code, Codex)

AI Agent Governance Toolkit — Policy enforcement, zero-trust identity, execution sandboxing, and reliability engineering for autonomous AI agents. Covers 10/10 OWASP Agentic Top 10.

All-in-One Sandbox for AI Agents that combines Browser, Shell, File, MCP and VSCode Server in a single Docker container.

Open-source All in One AI agent workspace. Run any agent — Claude Code, Codex — across your tools (100+ integrations + MCP), apps, browser, and files, with shared memory. Built-in models or BYOK.

Build and deploy AI Agents on Cloudflare