Awesome Agent Harness

Specification and documentation for Agent Skills

Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

Official Compound Engineering plugin for Claude Code, Codex, Cursor, and more

AGENTS.md — a simple, open format for guiding coding agents

The official Python SDK for Model Context Protocol servers and clients

A configuration framework that enhances Claude Code with specialized commands, cognitive personas, and development methodologies.

The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.

A framework for building agents and services

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

Scale computer-use 2.0 with open-source drivers, cross-OS fleets, and benchmarks for training, evaluation, and data generation.

Context window optimization for AI coding agents. Sandboxes tool output (98% reduction), persists session memory, and enforces routing across 17 platforms via MCP + hooks.

A self-improving RLM agent for coding workflows and long-running autonomous tasks.

An open-source, code-first Python toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

Agent Skills for Google products and technologies

High performance coding agent harness written in rust

How Python does AI. Agents, realtime voice, image generation, embeddings. Every model, every interface, typed end to end.

SWE-agent takes a GitHub issue and tries to automatically fix it, using your LM of choice. It can also be employed for offensive cybersecurity or competitive coding challenges. [NeurIPS 2024]

Harness engineering beginner tutorial, from 0 to 1

Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, security risks, prompt injection, data exfiltration, and supply-chain risks in Claude Code, Codex, and MCP skills before you install them.

Devika is the first open-source implementation of an Agentic Software Engineer. Initially started as an open-source alternative to Devin.

Open source agentic operating system

Orchestrate multiple coding agents from desktop and mobile

The LLM Evaluation Framework

Gas Town - multi-agent workspace manager

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

Open-source Agent Operating System

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

Browser Harness | Self-healing harness that enables LLMs to complete any task.

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)"

Python SDK for Agent AI Observability, Monitoring and Evaluation Framework. Includes features like agent, llm and tools tracing, debugging multi-agentic system, self-hosted dashboard and advanced analytics with timeline and execution graph view

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

Supercharge Your LLM Application Evaluations 🚀

"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.

A framework for few-shot evaluation of language models.

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

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

Google's open agentic orchestration runtime