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What's the difference?

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All stages · Demo 212

GTIN-14

Choice case / pallet / inner. GTIN-14 is fourteen digits with a 3-1 check from the left. Jev never weights the digits. Thirteen digits need 14.

ChoiceGTIN-14 checksum in JS

Barcode pips. 00012345678905 scans a case. A last-digit flip rejects. A short pack rejects on length.

replaypack —gtin —

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.