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How to install a third-party Harness plugin from GitHub with DeepSeek Harness Desktop

Add a Harness plugin from a GitHub repo through Desktop, with automatic rollback if startup fails.

Remote script. Third-party plugins run code on your local machine, so read the source and confirm the publisher before you install one.

Who it is forA macOS developer who found a Harness plugin on GitHub and wants to add it without editing config files by hand.

The problemAdding a plugin by hand risks a broken Harness startup, and pasted install commands can be risky to run in a shell.

The outcomeThe plugin is installed and Harness restarts successfully, or the previous plugin configuration is restored automatically.

What you need first

  • A macOS (Apple Silicon or Intel) or Windows 10/11 x64 computer
  • A model provider account and API key for the provider you want to use in Harness
  • For iPhone: an iPhone on iOS 17 or later and the TestFlight app
  • For Android: a device on Android 8.0 or later
  • For building from source: Node.js 22.19 or newer, and Git

Steps

  1. Open Settings, then Plugins, then Install & manage in DSH Desktop on macOS.
  2. Review the plugin's source code and publisher before installing.
  3. Enter the plugin source as github:owner/repo, or paste the full command: dsh plugin --profile web add github:owner/repo
  4. Wait for Desktop to restart Harness and confirm it starts successfully.
  5. If startup fails, check that the previous plugin configuration was restored.

Prompt for your agent

Using the chokwinlee/deepseek-harness-desktop repo, help me install the Harness plugin from github:<owner>/<repo> through DSH Desktop on macOS. Expected output: the plugin listed in Plugins and Harness running after restart. Verify that you have reviewed the plugin source and publisher before you confirm the install.

Caveat. The plugin installer is available on macOS only according to the README's Plugins section, and only public GitHub or npm sources are accepted.

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