Harness is the open-source command center for coding agents. It brings together Claude Code at work, Codex at home, Hermes in the cloud, and every other agent on every machine, side by side. Use the native desktop app, type hn in your terminal, or use the iOS and Android apps to answer agents by voice. Everything is end-to-end encrypted. Then go beyond code with 49 harnesses for CAD, circuits, robots, games, and music. It is free on Mac and Linux.
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Launched October 21, 2026
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