AI Diagnosis and the Router, rebuilt

**AI Diagnosis — find out why an agent is stuck** — when a delivery to an agent terminal keeps failing for about two minutes, an installed checker AI reads that terminal's screen text and classifies the problem: a quota wall, an upsell modal, a sign-in prompt. A chart seat that has backup agents fails over on its own instead of waiting out the full ten-minute timeout; every other terminal gets the diagnosis as a notification so you can act. A healthy agent is never checked, a busy one mid-task is never mistaken for stuck, and reading a stuck screen takes a one-time consent because a screen can hold secrets. The toggle, the consent and the checker chain live under **Advanced → AI Diagnosis**.

**You choose which agents do the checking** — an ordered checker chain in the dashboard: an agent that isn't installed, hits its own limit, or times out simply hands off to the next, and the stuck terminal's own provider is always skipped. Checkers run headless with restricted permissions in a neutral folder — they classify the screen and never touch your project.

**The Router, rebuilt as a match table** — Defaults is now one plain row per kind of work (plan, test, review, browser, docs…), each with an agent picker and, once you pick one, a model picker right beside it. See it two ways: **By work** lists every kind of work and who takes it, **By agent** groups the rules under the agent that owns them; anything you haven't assigned sits in an **Auto** pool. Ask for a kind of work without naming anyone and the host routes it for you — and a guided Tutorial now plays the Router end to end.

**Save a prompt as a reusable chart** — when you fan a prompt out to several `@agents`, the mode banner can now **Save as chart**, promoting the team you just described into a reusable Builder chart you can reopen anytime. What you saw in the send preview is exactly what gets charted.

**Learn the composer and the Router by watching them** — a Set-up screen in the orchestration dashboard teaches by playing the one flow every new user needs: type a task, `@`-mention the terminals that should help, press Enter, and watch them start as a team while Mission Control lights up. Reduced motion gets a stepped walkthrough with every stage still shown.

**Choose how AI file changes appear** — a new AI diff mode. **Preview Files** treats every change as accepted and just lists which files changed with added and removed line counts; **Review** keeps the per-file Accept / Reject controls with Keep / Undo overlays right in the editor. Switch between them anytime in **Settings → IDE**.

**Show or hide each project's terminals in the sidebar** — a per-project terminal toggle that remembers your choice across relaunches and stays in sync across every sidebar; the header rearranges itself as you resize the sidebar so the control never gets cramped.

**A seat that fails over stops holding onto its queued work** — when a seat hands off to a backup, everything still waiting to reach the dead terminal now fails right away with a clear reason, instead of sitting in the queue until the timeout runs out.