Harness Toolbox/Frameworks & SDKs

Agent SDKs & frameworks

general-purpose libraries for building agents

65 repositories, most starred first

The agent engineering platform.

142.0k
Python
3 yrs

Open-source super AI assistant & Agent Harness. Plans tasks, runs tools and skills, self-evolves with memory a…

46.0k
Python
3 yrs

Build, run, and manage agent platforms.

41.2k
Python
4 yrs

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

38.0k
+2257d
Python
11 mo

The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI P…

36.1k
+1947d
TypeScript
3 yrs

Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to…

29.3k
+1107d
TypeScript
2 yrs

🤗 smolagents: a barebones library for agents that think in code.

28.4k
+1167d
Python
1 yr

Build and run agents you can see, understand and trust.

28.0k
+2227d
Python
2 yrs

The batteries-included agent harness.

26.4k
+2727d
Python
11 mo

Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.

23.8k
+907d
Python
2 yrs

A Go agent harness and service framework

23.0k
+167d
Go
11 yrs

345 Claude Code skills & agent skills & plugins (30+ Agents, 70+ custom commands, 330+ skills, customizable re…

22.7k
+6657d
Python
9 mo

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

20.6k
+857d
Python
1 yr

AI Agent Framework, the Pydantic way

18.6k
+2357d
Python
2 yrs

<⚡️> SuperAGI - A dev-first open source autonomous AI agent framework. Enabling developers to build, manage &…

17.6k
+117d
Python
3 yrs

The absolute trainer to light up AI agents.

17.4k
+227d
Python
1 yr

Agent framework and applications built upon Qwen>=3.0, featuring Function Calling, MCP, Code Interpreter, RAG,…

16.8k
+887d
Python
2 yrs

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

14.9k
+1827d
Python
3 mo

Pocket Flow: 100-line LLM framework. Let Agents build Agents!

11.0k
+377d
Python
1 yr

Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-…

10.5k
+1057d
Python
1 yr

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

10.1k
+547d
TypeScript
1 yr

Practical patterns, starters & CLI tools for loop engineering with AI coding agents. Design systems that promp…

8.2k
+1,1867d
JavaScript
1 mo

Build autonomous AI agents in Python.

7.9k
+67d
Python
2 yrs

✨ Build AI agents and web apps — with a single binary.

7.5k
+17d
Go
4 yrs

The sandbox agent framework.

7.3k
+877d
TypeScript
5 mo

Build an agent harness and control it end-to-end. Open-source SDK for production AI agents in Python & TypeScr…

6.6k
+997d
Python
1 yr

OpenSquilla — Token-Efficient AI Agent with same budget, higher intelligence density

6.1k
+4577d
Python
2 mo

Democratizing Reinforcement Learning for LLMs

5.7k
+167d
Python
1 yr

The RL Bridge for LLM-based Agent Applications. Made Simple & Flexible.

5.6k
+407d
Python
1 yr

AG2 (formerly AutoGen): The Open-Source AgentOS.Join us at: https://discord.gg/sNGSwQME3x

4.8k
+297d
Python
1 yr

A simple yet powerful agent framework that delivers with open-source models

4.6k
+37d
Python
11 mo

Build distributed, production-grade, long-running agents.

4.5k
+1467d
Java
9 mo

Demystify AI agents by building them yourself. Local LLMs, no black boxes, real understanding of function call…

4.4k
+177d
JavaScript
8 mo

Code, Build and Evaluate agents - excellent Model and Skills/MCP/ACP/A2A Support

3.9k
+67d
Python
1 yr

Agent framework for the JVM. Pronounced Em-BAY-bel /ɛmˈbeɪbəl/

3.8k
+137d
Kotlin
1 yr

Skills for coding agents

3.7k
+847d
JavaScript
1 mo

A framework-agnostic, git-native standard for defining AI agents

2.9k
+47d
TypeScript
4 mo

A Python library for building AI agents that leverage the full power of Google Antigravity.

2.5k
+1247d
Python
2 mo

The memory-first self-improving agent harness built on EverOS.

2.2k
+7567d
Python
1 mo

verl-agent is an extension of veRL, designed for training LLM/VLM agents via RL. verl-agent is also the offici…

2.1k
+237d
Python
1 yr

The Agentic Framework of the PHP ecosystem to build production-ready AI driven applications. Connect component…

2.0k
+117d
PHP
1 yr

ESP-Claw, a "Chat Coding" AI agent framework for IoT devices

1.8k
+387d
C
3 mo

Official Repo for ICML 2024 paper "Executable Code Actions Elicit Better LLM Agents" by Xingyao Wang, Yangyi C…

1.7k
+47d
Python
2 yrs

[GenAI Application Development Framework] 🚀 Build GenAI application quick and easy 💬 Easy to interact with…

1.6k
+77d
Python
3 yrs

A Go framework for building production agent systems with graph workflows, tools, memory, A2A, AG-UI, MCP, eva…

1.6k
+267d
Go
1 yr

Standards for building agents, better

1.6k
+17d
TypeScript
1 yr

The LLM Anti-Framework

1.5k
+27d
Python
2 yrs

OctoTools: An agentic framework with extensible tools for complex reasoning

1.5k
+17d
Python
1 yr

The batteries included agent harness.

1.4k
+147d
TypeScript
11 mo

The agent framework where every run is durable, replayable, and resumable by default.

1.4k
Rust
2 yrs

The SmythOS Runtime Environment (SRE) is an open-source, cloud-native runtime for agentic AI. Secure, modular,…

1.3k
+17d
TypeScript
1 yr

A single interface to use and evaluate different agent frameworks

1.2k
+17d
Python
1 yr

Build your own Cowork, AI Scientist and other SoTA Agents just by editing config files. Support anthropic skil…

1.2k
+27d
Python
6 mo

LightAgent: Lightweight Python framework for OpenAI-compatible agents with tools, memory, guardrails, tracing,…

1.2k
+27d
Python
1 yr

Open-source AI agent harness in native Rust — GUI, CLI, headless, and webapp from one binary. Multi-provider,…

1.2k
+107d
Rust
2 mo

ADHD — a skill for coding agents. Tree-of-thought with pruning, built on the Claude & Codex Agent SDK. Fans ou…

948
+217d
TypeScript
1 mo

CUGA is an open-source generalist agent harness for the enterprise, supporting complex task execution on web a…

862
+47d
Python
10 mo

The foundation layer for agentic intelligence.

857
+57d
Python
10 mo

The llama-cpp-agent framework is a tool designed for easy interaction with Large Language Models (LLMs). Allow…

650
+27d
Python
2 yrs

A coding agent and general agent harness for building and orchestrating agentic applications.

639
+17d
TypeScript
1 yr

Integrate LLM in any pipeline - fit/predict pattern, JSON driven flows, and built in concurency support.

607
Python
1 yr

Cross-runtime skills for Claude Code, Codex, and multi-agent workflows.

234
Python
7 mo

学习Agent开发的笔记,尝试让Agent从可用到可靠

142
+237d
JavaScript
2 wk

Autonomous CLI agent integrations for the Spring AI ecosystem with Claude Code, Gemini CLI, and secure sandbox…

103
Java
10 mo

OmniAgent (ICML 2026): the first native omni-modal agent for active video perception — a 7B agent that beats Q…

51
+97d
Python
1 mo

More in Frameworks & SDKs