Harness Desktop

• Chat with approvals

  Streams the agent’s replies, thinking and tool calls, answers its approval and input dialogs, picks the model and thinking level, and asks before any shell command you send.

• Sessions and branches

  Lists a project’s saved sessions, shows the branch tree of each, opens the transcript, and resumes or forks it.

• Changes panel with review comments

  A graphical diff of the working tree (staged, unstaged, untracked). Comment on any line and send the comments to the agent as one prompt.

• Config viewer

  Settings, MCP servers and profiles of OMP, PI, OpenCode, Claude Code and Codex in one readable place, with secrets masked.

• Extensions

  Plugins, marketplaces, packages, skills, commands, agents, MCP servers and themes, with install, enable and update actions run through the harness’s own CLI.

• Hooks

  Small rules that add context to a prompt, send a follow-up after the agent finishes or run a command when something happens in a chat. A hook an agent adds never runs until you approve it.

• Recommended setup

  An optional step that, after you confirm each part, installs Harness Dashboard, Harness Memory and Harness Skills and registers their MCP servers in each detected harness.

• Share setup

  Export the marketplaces, plugins, packages and MCP servers of your harnesses as a string or a JSON file, and import one on another machine after reviewing the exact commands.

• Oh My Pi

  omp Supported

  Verified against 18.6.1.

• Pi

  pi Supported

  Tested with PI 1.1. Other versions show as untested.

• OpenCode

  opencode Partly supported
  • Detection
  • Configuration
  • Extensions
  • Sessions
  • Skills and MCP in Recommended setup
  • Share setup

  Chat is a preview.

• Claude Code

  claude Supported
  • Detection
  • Configuration
  • Extensions
  • Sessions
  • Recommended setup
  • Share setup

  Chat is a preview.

• Codex

  codex Supported
  • Detection
  • Configuration
  • Extensions
  • Sessions
  • Recommended setup
  • Share setup

  Chat is a preview.

1. # macOS and Linux

   $ curl -fsSL https://raw.githubusercontent.com/MSpiechowicz/harness-useful-desktop/main/install.sh | sh

2. # Windows (PowerShell)

   PS> powershell -ExecutionPolicy Bypass -c "irm https://raw.githubusercontent.com/MSpiechowicz/harness-useful-desktop/main/install.ps1 | iex"

Prefer a download? Every release and its notes are on the Harness Desktop releases page.

• Everything runs on your machine. No telemetry, no accounts, no stored tokens.
• Credential files are never read, and secrets in configuration are masked.
• The only network requests the app makes itself are the signed update check and a lookup of the companion tools’ latest release numbers on GitHub. Both can be turned off.
• Hook files are plain JSON in your data folder (harness-hooks/hooks). A hook an agent adds or changes runs only after you approve that exact version.

Harness Desktop is the window in Harness Useful, a family of four open-source, local tools for coding-agent harnesses. Harness Desktop is the window, Harness Skills the workflow, Harness Memory the shared project memory and Harness Dashboard the usage and cost meter.

Each tool works on its own. Harness Desktop’s Recommended setup can install the others after you confirm each part and register their MCP servers in each detected harness.

• Harness Skills From a natural-language request to reviewed, verified work.
• Harness Memory Project memory for your AI coding agents, in one local binary.
• Harness Dashboard Token usage across your AI coding tools, in one local app.

See the Harness Useful home page, all four tools side by side or the family FAQ.