Live Poll — with per-option voter identities 1M concurrent viewers on one hot poll · broadcasts who voted, not just counts
arrows 0/13cards 9letters A–H
happy-path side-effect failure-comp new-infra
▶ BOTE — canonical numbers (every N- chip in the rail links here)
▶ Failure playbook (A–H)
▶ What breaks first · interview framing