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discern

Uncertainty-aware pattern matching and control flow for Effect.

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How builders describe it

Uncertainty-aware control flow for Effect: Jev's Choice, Noul and Score answers become typed patterns with an explicit Uncertain branch, plus routable procedures, recording, replay, caching and call budgets.

Uncertainty-aware semantic control flow for Effect: type-safe patterns, policies, and routable procedures over Effect Decision / DecisionModel, including TypeSafe’s Jev provider.

The decision Jev makes

Any Jev question: yes or no, a choice, or a score, from your own stack.

Where it fits

Official and community SDKs, MCP servers and integrations for calling Jev from the languages and tools you already use. All 308 sdks & integrations projects →

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