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TyrnBeta

Explain, rewrite and commit

The assistant uses a harness and role you choose to power three editor actions. It uses harnesses that support a read-only one-shot mode.

Set it up

Open Settings > Agents > Assistant. “Choose the harness and role that power Explain, Rewrite selection and Generate commit message.” It is off until you choose a harness. The first time you use an action it opens “Choose a harness…”.

The Assistant settings page with a Harness choice and an optional Role choice.

settings.json
{
  "tyrn": {
    "assistant": {
      "harness": "claude_code",
      "role": null,
      "timeout_seconds": 120
    }
  }
}

The harness id above is an example. Use the one for your harness.

Explain

Right-click a selection or a file and choose Explain. A read-only Markdown tab opens with the explanation.

An Explain panel under selected code summarizing what the function does.

Rewrite selection

Select code, then right-click and choose Rewrite Selection, or press ctrl-enter. Type what you want at “Describe how to rewrite the selection…” and click Rewrite. Tyrn shows a diff. Choose Accept, Reject or Edit instruction.

Generate commit message

In the git panel, use Generate commit message (alt-tab) to write a message from your changes.