Distributed Denylist System signed-delta propagation · zero-hop local lookup · 12.5M sub-lookups/s · 100M entities fully replicated to ~400 edges · gov-mandate floor fails closed
arrows 0/20cards 14letters A–K
happy-path side-effect failure-comp new-infra
BOTE — canonical numbers (every N- chip in the rail links here)
Failure playbook (A–K)
What breaks first · interview framing