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What's the difference?

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All stages · Demo 224

SSCC-18

Choice case / pallet / inner. An SSCC is eighteen digits with a 3-1 check from the left. Jev never weights them. Seventeen digits need 18.

ChoiceSSCC-18 checksum in JS

Barcode pips. 000123456789012343 scans a case. A last-digit flip rejects. A short serial rejects on length.

replaypack —sscc —

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.