Enterprises reorganize. Product lines merge. Budgets shift. The systems that survive these moves are not the ones with the prettiest roadmap slides — they are the ones whose boundaries were named early and defended with discipline.
Seams are a feature, not technical debt
A domain boundary is a contract about what may change independently. When teams share databases “temporarily” or leak business rules across services, reorganization becomes a rewrite. Clear seams let you swap owners without swapping runtimes.
- Name bounded contexts in language stakeholders already use.
- Publish integration contracts before you publish org charts.
- Treat shared kernels as explicit decisions with expiry dates.
"Architecture that survives reorgs is architecture that makes ownership obvious."
We prefer written decision records over implicit tribal knowledge. When a boundary moves, the record moves with it — so the next team inherits context, not archaeology.