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What's the difference?

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All stages · Demo 05

Date stitch

Seven Choices read how a date is written. JavaScript builds the calendar. Jev never does the math.

ChoiceDate extraction cookbook

A mechanical watch face that snaps month, day, year, and ambiguity into a typed ISO date.

replayweakest part —ISO idle

assembled in code
----.--.--
Jev never adds the days.

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.