Harnesses (33)

Agent runtimes, frameworks and harnesses: CLIs, SDKs and orchestration loops.

Machine-readable: /api/harnesses.json.

• Agno

  Framework and runtime to build, run and manage agent platforms (Python SDK plus runtime).

• AI SDK (Vercel)

  Free, open-source TypeScript toolkit from Vercel for building AI apps and agents with streaming, fallbacks and multi-model support.

• Aider

  Open-source AI pair programming in your terminal.

• Amp

  Coding agent and development environment; run agents unsupervised in cloud orbs or locally with the CLI.

• AutoGen (deprecated)

  Microsoft Research's multi-agent programming framework, now in maintenance mode; new projects are pointed to Microsoft Agent Framework.

• Claude Agent SDK

  Anthropic's SDK for building production agents with Claude Code as a library, in Python and TypeScript.

• Claude Code

  Anthropic's agentic coding tool that reads your codebase, edits files, runs commands and integrates with dev tools; available in terminal, IDE, desktop and browser.

• Cline

  Open-source autonomous coding agent available as an SDK, IDE extension or CLI, with Plan/Act modes and MCP integration.

• Cloudflare Agents SDK

  SDK for stateful AI agents on Cloudflare with persistent state, real-time WebSockets, scheduled tasks and remote MCP servers.

• CrewAI

  Python framework for orchestrating role-playing, autonomous AI agents that collaborate as crews and flows.

• Cursor

  AI code editor and coding agent with Agent mode, Rules, Skills, MCP servers and a CLI.

• Deep Agents (LangChain)

  LangChain's batteries-included agent harness for agents that plan, spawn subagents and use a file system for complex tasks.

• DSPy

  Stanford NLP framework for programming, not prompting, language models.

• Factory Droids

  Factory's AI coding agents (Droids) that automate coding, testing and deployment.

• Gemini CLI

  Open-source AI agent from Google that brings Gemini models directly into your terminal.

• GitHub Copilot CLI

  Brings GitHub Copilot's coding agent to your terminal to read, write and run code where you work.

• Google Agent Development Kit (ADK)

  Open-source, code-first toolkit from Google for building, evaluating and deploying multi-agent systems.

• goose

  Open-source, extensible AI agent (desktop app, CLI and API) that can install, execute, edit and test with any LLM.

• Haystack

  deepset's open-source orchestration framework for production-ready, context-engineered LLM applications and agents.

• Kilo Code

  Open-source AI coding agent for VS Code, JetBrains, CLI and cloud, with access to 500+ models and bring-your-own-key.

• Kiro

  Agentic engineering environment that turns prompts into executable specs and builds across large codebases with parallel agents.

• LangGraph

  Low-level orchestration framework from LangChain for building resilient, stateful agents as graphs.

• LlamaIndex

  Document-processing platform for AI (open-source LlamaIndex library plus hosted LlamaParse APIs that turn PDFs, scans and Office files into markdown or JSON).

• Mastra

  TypeScript framework for AI agents and apps with memory, tools, MCP and observability built in.

• Microsoft Agent Framework

  Framework for building, orchestrating and deploying AI agents and multi-agent workflows in Python and .NET; successor to AutoGen.

• OpenAI Agents SDK

  Lightweight framework from OpenAI for multi-agent workflows in Python (with a JS/TS sibling SDK).

• OpenAI Codex CLI

  OpenAI's lightweight open-source coding agent that runs in your terminal.

• OpenCode

  The open-source AI coding agent, built for the terminal.

• OpenHands

  Open-source, model-agnostic platform for cloud coding agents.

• Pydantic AI

  Typed Python agent framework from the Pydantic team covering agents, realtime voice, image generation and embeddings across many models.

• Qwen Code

  Open-source AI coding agent for the terminal from the Qwen team.

• Semantic Kernel

  Microsoft's open-source SDK for integrating LLM capabilities quickly and easily into your apps.

• smolagents

  Hugging Face's barebones Python library for agents that think in code.