This module does not expose replaceable service contracts in v1. Its activity-owned contract is:
Sequence.Activitieschild slot
SequenceStructureHandlerimplementsIActivityStructureHandler(Elsa.Workflows.Design.Core), includingProjectScopedVariables— aSequenceis a container scope that can own container-scoped variable declarations visible to its descendant activities (ADR 0027). The authored/executable structures carry these declarations through publishing so the runtime materializes them without re-reading the design document.