All stages · Demo 319

South African ID

Choice said / temp / other. Thirteen digits with a Luhn check. Jev never doubles from the right. Twelve digits need 13.

ChoiceZA Luhn in JS

A digit tape. 8501015800088 books a DHA plate. A last-digit flip rejects. Twelve digits never pass.

replaykind —zaid —

STANDBY

All 4056 stages

Educational stage on jev.page — not the official TypeSafe console. Live calls go to POST https://api.typesafe.ai/v1/systemone from your browser when you paste a key. Without a key, the stage plays a recorded decision shaped like jev-1.13.0. Jev does not write the UI copy.