Steer a running agent

Watching an agent head down the wrong path and having to stop it, rewrite the prompt, and start over is the most wasteful thing in agent chat. You can now steer a run while it's happening: type the correction into the composer and the agent takes it from there, keeping everything it has already done.

A steered turn renders as what it actually is — the response so far, your correction, then the continuation — and it survives a reload in that same shape. Runs are resumable, so closing the tab no longer kills the work.