Accepted decision record for the in-app demo overlay: a --demo mode
that shows automatic keystroke badges ([TAB], [ENTER], …) and a
stealth Ctrl+]-delimited step-caption buffer, both as floating
black-on-yellow boxes at the output panel's bottom-right. All forks
user-confirmed; a /runda pass contributed 10 tightening findings.
Indexed in docs/adr/README.md.