Autonomous (@autonomous_labs) open-sourced OpenHarness (github.com/autonomous-ai/openharness): not another coding agent, but a harness control plane that runs Claude Code, Codex, Cursor, OpenCode, Pi, Command Code, Devin, Grok Build, and more in persistent tmux sessions across machines. Domain-Specific Harnesses target CAD, PCBs, robotics, and games; a desktop app plus open-hardware Harness units shipped the same week. Credentials stay in each vendor’s local config; machines link via outbound-only daemons with end-to-end encrypted relay/WebRTC.

Key Takeaways

  • ✓Open-sources OpenHarness: a multi-agent control plane for Claude Code/Codex/Cursor and peers, not another agent.
  • ✓Adds Domain-Specific Harnesses (CAD/PCB/robotics/games) plus an open-hardware desk device shipping the same week.
  • ✓Persistent tmux sessions; credentials stay local; outbound-only multi-machine link with E2E encrypted relay.
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