Verify resource inspection isolation and selection

docs/roadmap/implementation.md

@@ -438,6 +438,10 @@ add narrowly scoped encoding support; do not move adaptation into consumers.
 
 ## Stage 8: Verify Selection, Isolation, And Offline Boundaries
 
+**Completed:** Public namespace, offline reference, ownership, concurrent
+inspection, execution fallback, and retained null/provenance checks pass under
+the race detector. Existing captured-content and requirement tests remain in use.
+
 **Scope:** Public behavior risks not already covered by the migrated suite.
 
 1. Extend existing namespace tests for backend inspection: scoped slashless ID,