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What's the difference?

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All stages · Demo 382

El Salvador NIT

Choice sv / vat / other. Fourteen digits; (sum%11)%10. Jev never mods 11. Thirteen digits need 14.

ChoiceSV 1–9 in JS

A digit tape. 06140101001017 books an MH plate. A last-digit flip rejects. Thirteen digits never pass.

replaykind —sv —

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.