Architecture

Architecture finds where a codebase's structure makes change expensive and proposes a better shape: a deeper module, a seam where behavior has to vary, or a boundary moved to where the domain language changes. It analyses and proposes; it edits nothing. Neighbours: Refactor executes one behavior-preserving transformation, Implement changes behavior, Plan slices a chosen change, Domain settles what terms mean per context, and Review advises on an existing plan or diff.

Lineage: Parnas on information hiding, Ousterhout on deep modules and designing twice, Evans on bounded contexts, Cockburn on ports and adapters, Feathers on seams.

Vocabulary

Use these meanings in every proposal so the caller can compare them.