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What's the difference?

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All stages · Demo 156

EAN bars

Choice grocery / book / pharma. Odd positions from the left ×1, even ×3. Jev does not sum the barcode.

ChoiceEAN-13 after class

A stub barcode of odd/even pulses. 5901234123457 scans; a one-off check digit rejects.

replaykind —ean —

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.