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What's the difference?

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All stages · Demo 158

MCC fee

Choice grocery / dining / atm. Interchange is `amount * RATE[mcc]`. Do not ask Jev what 1.5% of forty is.

ChoiceInterchange table in code

A conversion strip. The same $40 grocery ticket is not the dining ticket. ATM lights zero.

replaymcc —fee —

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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.