Status: OUT
The write-available, read-correct architecture is coherent exactly at the structural boundary: everything within the structural safety net (immutability, construction-based guarantees, deterministic testing) reinforces itself in a self-consistent system, but coherence cannot extend past what structural enforcement reaches — the write-read split is simultaneously the source of the architecture's strength and the edge where its guarantees end.
The architecture's coherence and its limits both originate at the write-read boundary — structural enforcement creates the coherence, and temporal properties beyond it define the boundary
Depends on (SL): codebase-architecture-is-write-available-read-correct, design-coherence-bounded-by-enforceability