Why: A failed completion-card write could strand durable results, and routed messages could discard a selected result reference.
Evidence: Regressions cover missing projection recovery without execution, unavailable saved runs, pre-child dispatch failures and existing work/authorization paths.
Impact: Reconcile terminal saved results on authorized reads, keep known failures visible, and route explicit references through the conversation context.
Refs: feature/workbench-flow-completion review reliability and API findings