Interface StructureStageTaggedEvent

Event payload for StructureRecorder.onStageTagged. Fires when names land on a stage AFTER its onStageAdded already fired — the .tag(...) cursor door (flowChart(...).addFunction(...).tag('a')). Names declared in the same call as the stage (options.tags, SubflowMountOptions.tags) ride StructureStageAddedEvent.tags and do NOT fire this: one declaration, one event. tags is the COMPLETE list on the stage after the door — the builder refuses a second declaration on the same stage, so it is also the only one.