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What's the difference?

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All stages · Demo 102

Contrast gate

Choice body / large / deco. Relative luminance and `(L1+0.05)/(L2+0.05)` stay in JavaScript. AA is a number.

ChoiceWCAG contrast in code

Two swatches. Grey on white fails 4.5:1 even if it “looks fine.”

replayrole —ratio —

fg
bg

—

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.