Part III. Coordination, Effects, and Delivery

Part III moves from structural design claims to operational composition. The earlier parts explained what the artifacts mean and how that meaning survives translation and integration. This part asks how those artifacts behave when work branches, rejoins, emits effects, and reaches production-facing execution paths.

The running example now becomes a delivery argument. Parallel preparation, synchronization boundaries, effect boundaries, execution traces, and acceptance evidence all become first-class artifacts rather than implementation residue. That shift is necessary in the AI agent era because orchestration speed can hide responsibility transfer, evidence loss, and unsafe writes unless the workflow makes those boundaries explicit.

Watch for three things in this part. Which branch may proceed independently. Which morphism alone may create an authoritative new state. Which emitted evidence allows the final case study to be reconstructed after the fact.

These chapters close the narrative arc of the manuscript. They show that compositional software design is not complete when the diagrams are elegant. It becomes operationally credible only when the delivery path stays reviewable under concurrency, effects, and bounded automation.