Exposure dedup.

Repeat evaluate calls for the same Flag and targetingKey within the revalidation window (revalidateMs, default 60 seconds) replay locally with reason: "CACHED" and fire no second Exposure. Rendering a component twice in one page load counts the subject once.

When a new experiment Run starts, the SDK detects the boundary within that window and fires a fresh Exposure. A Run is the unit analysis is computed over, so an Exposure suppressed across a Run boundary would attribute the subject to the wrong Run.

Errors are never cached. A failed resolution replayed from cache would turn one outage into a window of them with no new signal.

Bounding the seen set

Dedup state is an in-memory seen set bounded by maxSize and a TTL. Both must be positive; a zero or negative bound would disable dedup without saying so, which is exactly the silent-default failure the SDK refuses.

Telemetry for a replayed local resolution is reported separately. If that report cannot be delivered you get SDK_CACHED_TELEMETRY_FAILED. The value your code received is unaffected; it is surfaced so a telemetry gap never reads as an absence of traffic.