os-factory/har

117 stars · Last commit 2026-10-07

HAR: open agent harness (CLI + MCP) for coding agents. Isolated worktrees, deterministic verify, software factory workflows for Claude Code, Cursor, and Codex.

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  <img src="assets/logo.png" alt="HAR logo" width="120">
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# HAR: The open harness for AI coding workflows you can trust and verify

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HAR is an open-source **agent harness** for AI coding workflows you can trust and verify. It runs every coding agent in its own isolated, consistent **worktree**, with deterministic validation, verifiable proof, and full observability. Run one agent or a whole fleet, with the same quality and control. It wraps the tools, tests, and CI you already use, and stays yours to customize.

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      <a href="https://youtu.be/XKl4ZzWy7mQ">
        <img src="http://img.youtube.com/vi/XKl4ZzWy7mQ/maxresdefault.jpg" alt="HAR introduction demo" width="600"/>
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