Awesome Agent Harness

One local control plane for every AI agent: route across models, fuse new capabilities, orchestrate tools, and stay fully in control.

Official, Anthropic-managed directory of high quality Claude Code Plugins.

🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.

A reliable coding agent for complex software engineering tasks.

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

GitHub's official MCP Server

A hive mind communication platform

Open-source 24/7 Cowork app for OpenClaw, Hermes, Claude Code, Codex, OpenCode and 20+ more CLI Agent | Customize your assistants | Team them up｜Star if you like it!

⌥ Coding agent with the IDE wired in. Built by Stencil Labs.

OmX - Oh My codeX: Your codex is not alone. Add hooks, agent teams, HUDs, and so much more.

Use Codex from Claude Code to review code or delegate tasks.

Fast, small, and fully autonomous AI personal assistant infrastructure, any OS, any platform — deploy anywhere, swap anything 🦀

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory with small models for free

Local-first code intelligence graph for MCP and CLI. Builds a persistent map of your codebase so AI coding tools read only what matters, with benchmarked context reductions on reviews and large-repo workflows.

A lightweight alternative to OpenClaw that runs in containers for security. Connects to WhatsApp, Telegram, Slack, Discord, Gmail and other messaging apps,, has memory, scheduled jobs, and runs directly on Anthropic's Agents SDK

Vercel's official collection of agent skills

TencentDB Agent Memory is a team-level memory hub for AI Agents — turning conversations, docs, and code into four reusable memory assets (Chat Memory, Skill, LLM-Wiki, Code-Graph) that are governed, shared, and equipped across agents and frameworks.

The batteries-included agent harness.

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

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

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 format specification for describing a visual identity to coding agents. DESIGN.md gives agents a persistent, structured understanding of a design system.

Get 10X more out of Claude Code, Codex or any coding agent

Open source Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents. Built for multitasking, organization, and programmability.

#1 Persistent memory for AI coding agents based on real-world benchmarks

An open-source AI coding agent that lives in your terminal.

Kilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with the most popular open source coding agent.

Beads - A memory upgrade for your coding agent

Persistent file-based planning for AI coding agents and long-running tasks. Crash-proof markdown plans, session recovery after /clear and compaction, per-turn re-injection against context rot, deterministic completion gate. Manus-style. Install from npm, the Claude Code plugin marketplace, or npx skills. Codex, Cursor, OpenCode, 60+ agents.

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

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.

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.

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