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Agent workspace · Autonomous, Inc. (GitHub org autonomous-ai)

OpenHarness

Open-source desktop app, CLI and per-machine daemon that runs coding agent CLIs (Claude Code, Codex, Cursor, OpenCode and others) in tmux panes across several machines, with end-to-end encrypted links and an optional hardware display.

Reviewed by the Termdex team · facts checked 2026-10-21 against 16 vendor sources · how we check

Official site

OpenHarness review

OpenHarness is the repository name; the app is called Harness, from Autonomous, Inc. It runs coding agents such as Claude Code and Codex, each in its own tmux pane (tmux), and shows agents from several machines in one window. The code is MIT licensed and the app download is free. The facts about Harness come from the vendor's pages and repository, read on 10 and 11 November 2026. We did not install or run the app.

How it works

The engines doc lists fourteen agents. Harness reads each agent's own transcript and installs the vendor's own hooks or plugin, depending on the agent, so credentials stay in the agent's own folders.

To add a second machine, you install a daemon there. The README says this needs no SSH keys or open ports, and that traffic is end-to-end encrypted. It goes direct over WebRTC, through Cloudflare TURN, or through the vendor's relay as a fallback. The architecture doc says the relay stores machine records, agent names and counters, never a transcript.

Where it falls short

Alternatives

Jean also runs agent CLIs in separate worktrees, according to our Jean review.

OpenHarness at a glance: on macOS, Linux, free, MIT licence.
Platforms, price and licence at a glance, from the vendor pages we read.

Facts: platforms, price and licence

platforms
macOSLinuxProduct is branded 'Harness'; the repository is named openharness. README: 'Download the app for macOS or Linux'. docs/development.md: macOS is the primary supported and tested desktop experience; Linux builds and a Windows runner exist but full Linux and Windows support is work in progress; embedded harness webviews run only on macOS. The download page harness.autonomous.ai/desktop (raw HTML checked 2026-11-11) is headed 'Harness for macOS, Windows and Linux' and has Download for macOS, Download for Windows, Linux x64 and Linux ARM64 entries; the README says macOS or Linux, so they differ. A standalone iOS/Android viewer app exists in the repo under mobile/ (build from source).
price
Freeautonomous.ai/harness shows 'Harness App - Download for free'; MIT licence. Optional Harness Device hardware listed at a $129 sale price (list $149, Black Friday), on autonomous.ai/harness-device. A 'Harness Pro' item at $299 is listed on autonomous.ai/harness; its own page (autonomous.ai/harness-pro) is titled 'Harness Pro: A Desk Screen for Every AI Agent on Every Machine' (seen 2026-11-11). Terms or limits of the hosted relay/backend were not found.
source
Open sourceLicence: MIT
github
autonomous-ai/openharness 1.5k stars, seen 2026-11-13

OpenHarness features

✓ documented · – absent or not in its feature list · ? not verified

OpenHarness strengths

  • MIT licence for app, CLI, daemon, relay and device files in one repository; app download is free
  • docs/engines.md lists 14 agent CLIs; Harness reads each agent's transcript and installs the vendor's own hooks or plugin, depending on the agent (hooks for some, plugin, extension or transcript only for others), instead of wrapping it; credentials stay in the agent's own folders
  • Each harness can get its own git worktree and branch (README); keys can be remapped in one JSONC file
  • Machines are linked by a daemon that dials out; the README says no SSH keys, Tailscale or port forwarding are needed, and says traffic is end-to-end encrypted and goes direct over WebRTC, through Cloudflare TURN, or through the vendor's relay as a fallback. architecture.md: the relay stores machine records, agent names and daily counters, never a transcript, a recap or a keystroke; the browser web client does not negotiate WebRTC and reaches machines through the relay

OpenHarness weak points

  • docs/development.md says the current source's start command refuses to run without a saved sign-in (desktop bootstrap also checks login) and lists account-free local use as outstanding work; this describes the source, not a statement about the released app
  • docs/development.md: macOS is the primary supported and tested platform; full Linux and Windows support is work in progress and embedded webviews run only on macOS. The README says macOS or Linux; the download page lists Linux x64, Linux ARM64 and Windows
  • Young and fast-moving: repository created 2026-08-04, CLI at v0.6.3, GitHub API listed 16 desktop release tags (v1.4.13 to v1.4.28) all dated 2026-11-10 with no attached files; installers are hosted on the vendor's site
  • No usage limits or terms for the hosted backend/relay (harness-api.autonomous.ai) appear on the pages read, and no app store link for the phone app appears there; absence from these pages is not proof that none exists. architecture.md also mentions a web app in public preview at harness.autonomous.ai

Who OpenHarness is for

best for
Developers who run several agent CLIs on a laptop and a remote box and want one window, with worktrees and encrypted links, and accept a vendor sign-in.
look elsewhere if
Anyone who needs fully account-free local use today, or a settled Windows build.

Lists that include OpenHarness

Sources and what we could not verify

Checked 2026-10-21. Prices and features change; the vendor's page is the authority.

Not verified