har MCP Server
os-factory/har
[](https://agentrank-ai.com/tool/os-factory--har/?utm_source=badge&utm_medium=readme&utm_campaign=agentrank_badge) HAR: open agent harness (CLI + MCP) for coding agents. Isolated worktrees, deterministic verify, software factory workflows for Claude Code, Cursor, and Codex.
claude mcp add agentrank -- npx -y agentrank-mcp-server Overview
os-factory/har is a TypeScript tool licensed under Apache-2.0. HAR: open agent harness (CLI + MCP) for coding agents. Isolated worktrees, deterministic verify, software factory workflows for Claude Code, Cursor, and Codex. Topics: ai-agents, ai-coding, ai-tools, software-factory, harness, harness-engineering, harness-framework, agents, claude-code, cli, coding-agents, cursor, developer-tools, mcp, mcp-server, typescript, worktree.
Ranked #370 out of 24846 indexed tools.
In the top 2% of all indexed tools.
Ecosystem
Score Breakdown
121 stars → growing community
Last commit 1mo ago → moderate activity
107/113 issues closed → responsive maintainer
7 contributors → small team
No dependents → no downstream usage
Weights: Freshness 20% · Issue Health 20% · Dependents 22% · Stars 10% · Contributors 8% · How we score →
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From the README
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# HAR: The open harness for AI coding workflows you can trust and verify
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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▶ <strong>Introduction demo</strong>, click the thumbnail to watch on YouTube
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Works with **Claude Code** · **Cursor** · **Codex** · any MCP agent.
## What's included out of the box
- **HAR.** The core harness, available as both a CLI and an MCP server. It turns any repository into isolated worktrees with dete Read full README on GitHub → Get the weekly AgentRank digest
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