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What's the difference?

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All stages · Demo 257

GSTIN plate

Choice goods / services / other. GSTIN is two digits, PAN, entity, Z, and a mod-36 check. Jev never indexes the alphabet. Fourteen chars need 15.

ChoiceGSTIN checksum in JS

A digit tape. 27AAPFU0939F1ZV books goods. A last-character flip rejects. Fourteen characters never pass.

replaykind —gstin —

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.