Events

Strengthen publishes two groups of pre/post events, all dispatched synchronously on the acting player's entity-owner thread; post events are read-only and cannot be cancelled

Event	Timing	Cancellable	Mutable field	Cancellation/effect
StrengthenPreAttemptEvent	After preview/conditions pass, before success roll and costs	Yes	successRate	Stops the attempt before charging or rolling. Carries the operation id
StrengthenAttemptEvent	After an attempt is fully resolved	No	None	Reports AttemptResult, committed state, outcome, success, and the same operation id
StrengthenTransferEvent	After transferred stars are computed, before target rebuild	Yes	transferredStar	Prevents the target rebuild/transfer
StrengthenTransferCompletedEvent	After the target item is rebuilt successfully	No	None	Read-only transfer outcome notification

Post events are informational and cannot undo committed state. While the runtime bridge is unavailable, no events are synthesized at all