ARCHITECTURE Signal 437
Article: Enabling Evolutionary Architecture Through the Preservation of Change Locality
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For engineers, boundary drift means that seemingly simple features (e.g., changing a delivery address) require cross-team coordination and deep system-wide knowledge, slowing delivery and increasing risk. The article offers practical sociotechnical strategies—redistributing mechanics, exposing essential policy, and rehearsing exception paths—to restore locality and keep changes proportional to their scope.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
Change locality is preserved when the team responsible for a capability can answer what can change, what contract protects neighbors, and what evidence proves safety without reconstructing the whole system.
Boundary drift occurs when the old boundary still exists but the actual path of change has moved, so a team must understand decisions owned elsewhere to make a local change safely.
Architects can intervene by redistributing repeated mechanics, exposing essential policy, and rehearsing real exception paths to restore locality or make cross-cutting coordination explicit.
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