Jev launches: a System One model for decisions
TypeSafe founder Diogo Almeida introduces Jev, its RLCD training method, and its focus on software decisions. The post includes a 2:56 launch video.

System One is an open-source Jev-class decision engine supporting choice/score/yes-no, with a single forward pass of ~33ms, 100+ languages, and a built-in router. No text generation, nothing to parse, nothing to hallucinate.
🚨SYSTEM ONE. OPEN SOURCE. ~24K STARS IN A WEEK. Someone just shipped a Jev-class decision engine you can actually run. • choice / score / yes-no • 1 forward pass (~33ms) • 100+ languages • built-in router No text generation. Nothing to parse. Nothing to hallucinate. It's