Demo With Narration

STARTER_CHARACTER = 🎬

A demo is a proof performed twice: once fast and private to convince yourself, once slow and narrated to convince the person watching.

Stage 1: Self-demo

Exercise the real artifact the way its consumer will — the built binary, the running app. A green test suite is the starting point, not the proof.

Check every behavior you intend to claim: the happy path, each refusal path with its exact stderr reason and exit code, every way the session can end.
Probe at least one path beyond the obvious ones (quit from the menu, not just close the window) — the extra path is where green-suite bugs hide.
A detached GUI launch loses its exit status: wrap the launch in a subshell that writes $? to a file, read the file after the window closes.
Confirm a window really rendered with a screenshot; drive close and quit through accessibility clicks.

Done when every behavior you will claim in the walkthrough has been observed working, and any bug found is fixed and re-proven.