ExpectationEvaluator

Bases: Protocol

Pure predicate over (metadata, state, wal, clock).

Returns None for "no violation right now." Evaluators must be deterministic functions of their inputs — the sweeper is called on a periodic tick, so non-deterministic evaluators would flap.

name

evaluate(expectation, context)

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def evaluate(
    self,
    expectation: Expectation,
    context: ExpectationContext,
) -> Violation | None: ...