# har

> har — os-factory-har. Use this tool when you need to develop and manage coding agents with isolated worktrees and deterministic verification. It solves problems related to agent development, testing, and deployment, and provides a command-line interface (CLI) and multi-agent control plane (MCP) for workflows with Claude Code, Cursor, and Codex. It takes in git-based inputs and outputs verified agent code, making it ideal for use cases requiring reliable and reproducible agent development.

Canonical page: https://skillsregistry.net/skills/os-factory-har  
JSON: https://api.skillsregistry.net/v1/skills/os-factory-har

## Description

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

## Trust

- **Trust score (0–1):** 0.50
- **Verification tier:** unverified

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **License:** Apache-2.0
- **Updated:** 2026-09-26

## Source

- **Source listing:** [GitHub](https://github.com/os-factory/har)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "os-factory-har"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/os-factory-har` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/os-factory-har/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt