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What's the difference?

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All stages · Demo 281

NINO plate

Choice paye / self / other. A UK NINO is two letters, six digits, and A–D. Jev never regexes the suffix. Seven characters need 9.

ChoiceNINO format in JS

A digit tape. AB123456C books PAYE. Suffix E rejects. Seven characters never pass.

replaykind —nino —

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.