LongHorizon Harness
LongHorizon Harness is a free, open-source AI desktop app for Windows and macOS. The long-horizon computer-use harness. Run AI agents across desktop apps and the CLI for extended periods while preserving task state and making reliable progress on complex workflows. It has 1,684 GitHub stars and is released under the MIT license.
- macOS
- Windows
- AI desktop apps
- Actively maintained
About LongHorizon Harness
Give Claude Code, Codex, OpenCode, or DeepSeek Harness a goal once. Keep it working across desktop apps and the terminal for dozens of hours.
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What is LongHorizon Harness?
LongHorizon Harness is a free, open-source AI desktop app for Windows and macOS. The long-horizon computer-use harness. Run AI agents across desktop apps and the CLI for extended periods while preserving task state and making reliable progress on complex workflows. It has 1,684 GitHub stars and is released under the MIT license.
Is LongHorizon Harness free and open source?
Yes. LongHorizon Harness's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install LongHorizon Harness?
Download the installer for Windows and macOS from its GitHub Releases page (latest: v0.1.7) or the project website.
Is LongHorizon Harness still maintained?
The repository's most recent commit was on Aug 20, 2026. appsgit only lists apps whose repository had a commit in the last six months.