Covers the cloud-session notice and mirror: the starting and handed-off states with the link out and the continue-here command, the bridge question's pick-then-confirm answering with its queued/withdrawn/delivered/failed states, the labelled mirror box with UI chrome scrubbed, and that nothing renders for other run targets.

## Before writing SPEC.md files

Read https://raw.githubusercontent.com/brillout/sdd/refs/heads/main/sdd.md
