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What's the difference?

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All stages · Demo 122

Budget tank

Choice two / three / four nines. Allowed errors are `floor(n * (1-target))`. Twelve errors blow a 99.9% month.

ChoiceSLO error budget in code

A tank. Magenta fill is spend. Negative remainder is a page you wrote.

replayslo —left —

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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.