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How to run a coding session that asks only about risky steps with Mu

Install Mu and let the judge approve routine commands, asking you only about the rest.

Who it is forA developer using a coding agent who is tired of approving every routine command in the terminal.

The problemEach permission prompt interrupts the work, and fixed rules often get routine calls wrong.

The outcomeA coding session where the default Jev approves mode lets through what the task clearly needs and asks about everything else, with every verdict logged.

What you need first

  • Node.js 22.19 or newer for the command line, or the desktop installer for macOS, Windows or Linux
  • An API key or a supported ChatGPT, Claude, Grok or Google subscription (the free Jev on OpenCode Zen answers until you set a judge key)
  • A project folder to work in

Steps

  1. Run npm i -g mu-agent (Node.js 22.19 or newer is required).
  2. Run mu setup to connect a model.
  3. Change into your project folder and run mu to start a session in the current directory.
  4. Keep the default Jev approves mode, and check /status during the session to see the verdicts.

Prompt for your agent

Install the mu-agent package for the mu coding agent (github.com/qybaihe/mu) with `npm i -g mu-agent`, run `mu setup`, then start `mu` in <project path>. Expected output: a running session in that folder. Verify that `mu ledger` lists at least one judge verdict with its probabilities and timing after a short task.

Caveat. Mu is in early development (0.1.x), so behavior and settings may change between releases.

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