HAR
Open-source agent harness with a CLI and MCP server, isolated worktrees and deterministic verification.
Overview
HAR is an open agent harness from the OS Factory project. It provides a CLI and an MCP server, runs agent work in isolated git worktrees and checks the results with deterministic verification.
It is released under the Apache-2.0 license and installs from npm, with documentation on harproject.dev. There is no pricing or hosted tier.
Features
- Ships as a CLI and an MCP server.
- Runs agent work in isolated git worktrees.
- Verifies results deterministically.
- Installs from npm, with public docs.
Details
- Website
- harproject.dev
- Company
- OS Factory (HAR)
- Category
- Agent orchestration
- Source
- Open source
- Repository
- github.com/os-factory/har · 124 stars
- License
- Apache-2.0
- Commercial offering
- None found
- Topics
- Listed
- October 2026
- Last verified
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