Status: IN
The module boundary serves as the architecture's universal containment mechanism across two independent concerns: quality properties (each module's simplicity-to-verification cycle is hermetically self-contained with no cross-module dependencies) and pragmatic tradeoffs (brute-force algorithms, bounded collections, and simplified implementations are safely confined by module isolation) — ensuring that per-module design choices neither constrain nor compromise other modules.
Module boundaries contain both quality cycles and pragmatic tradeoffs, making them the universal isolation mechanism
Depends on (SL): verified-simplicity-is-hermetically-contained, pedagogical-breadth-is-safely-contained