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Open Source Agent Harnesses
An agent harness is software that lets an AI model plan and execute tasks on your machine: read files, run commands, call APIs, and install open source tools for you.
All facts verified 2026-07-20 from the linked repositories. Stars are point-in-time snapshots and will change.
Personal assistants
Harnesses designed for general-purpose tasks: conversations, automations, messaging integrations, and persistent memory across sessions.
| Name | License | Stars | Install | Works with | Last activity |
|---|---|---|---|---|---|
| OpenClaw | MIT | 384k | n/a | n/a | 2026-07-20 |
| Hermes Agent | MIT | 218k | curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash | Nous Portal, OpenRouter, OpenAI, Anthropic, xAI, DeepSeek | 2026-07-08 |
Coding agents
Harnesses built for software development: they read your codebase, propose and apply changes, run tests, and can install open source dependencies on your behalf.
| Name | License | Stars | Install | Works with | Last activity |
|---|---|---|---|---|---|
| OpenCode | MIT | 188k | npm i -g opencode-ai@latest | OpenAI, Google Gemini, GitHub Copilot | 2026-07-16 |
| Claude CodeProprietary | LicenseRef-Anthropic-Commercial | 138k | npm install -g @anthropic-ai/claude-code | Anthropic | 2026-07-19 |
| Codex CLI | Apache-2.0 | 100k | npm install -g @openai/codex | OpenAI | 2026-07-18 |
| OpenHandsOpen Core | MIT | 81k | npm install -g @openhands/agent-canvas | Any LLM | 2026-07-15 |
| Pi | MIT | 73k | npm install -g @earendil-works/pi-coding-agent | OpenAI, Anthropic, Google | 2026-07-16 |
| Open Interpreter | AGPL-3.0 | 67k | n/a | n/a | n/a |
| Cline | Apache-2.0 | 65k | npm i -g cline | Anthropic, OpenAI, Google Gemini, OpenRouter, AWS Bedrock, Azure, Ollama | 2026-07-20 |
| Goose | Apache-2.0 | 51k | curl -fsSL https://github.com/aaif-goose/goose/releases/download/stable/download_cli.sh | bash | Anthropic, OpenAI, Google, Ollama, OpenRouter, Azure, Bedrock | 2026-07-14 |
| Aider | Apache-2.0 | 48k | python -m pip install aider-install && aider-install | Anthropic, OpenAI, DeepSeek, Ollama, OpenRouter | 2025-08-09 |
| Gemini CLI | Apache-2.0 | 106k | n/a | Google Gemini | n/a |
| Continue | Apache-2.0 | 35k | n/a | n/a | n/a |
| Reasonix | MIT | 27k | npm i -g reasonix | DeepSeek, OpenAI-compatible endpoints | 2026-07-20 |
| Kilo Code | MIT | 26k | npm install -g @kilocode/cli | Claude, GPT, Gemini, DeepSeek | 2026-07-16 |
| Qwen Code | Apache-2.0 | 26k | npm install -g @qwen-code/qwen-code@latest | OpenAI, Anthropic, Google Gemini, Qwen, Ollama | 2026-07-19 |
| Crush | n/a | 27k | n/a | n/a | n/a |
| Roo Code | n/a | 24k | n/a | n/a | n/a |
| jcode | MIT | 9k | curl -fsSL https://jcode.sh/install | bash | Claude, OpenAI, Gemini, GitHub Copilot, Azure, Ollama, DeepSeek | 2026-07-20 |
| CodebuffOpen Core | Apache-2.0 | 8k | npm install -g freebuff | DeepSeek, Kimi, MiniMax | 2026-07-20 |
| ForgeCode | Apache-2.0 | 7k | curl -fsSL https://forgecode.dev/cli | sh | Claude, GPT, Grok, DeepSeek, Gemini | 2026-07-16 |
| SWE-agent | n/a | 20k | n/a | n/a | n/a |
| gptme | MIT | 4k | python -m pip install gptme | Anthropic, OpenAI, Google Gemini, xAI, DeepSeek, Ollama | 2026-07-17 |
| letta-code | Apache-2.0 | 3k | npm install -g @letta-ai/letta-code | Any LLM | 2026-07-20 |
| Devonstale | AGPL-3.0 | 3k | pip install devon | Anthropic, OpenAI | 2025-05-26 |
| Plandex | n/a | 16k | n/a | n/a | n/a |
Data sourced from GitHub API, Hacker News, and official documentation. Verified 2026-07-20.