Why: Shared read pointers still violate project snapshot isolation, while context and audit candidates now have a tested local combination.
Evidence: Fixed RDM RED, source-reviewed read-isolation options, and clean Backend combination SELF receipts are linked with precise limits.
Impact: Preserves a pending W4a design and local probe report without claiming stage-six acceptance or component release.
Refs: feature/rdm-two-trees-latest-templates W4a W6 W9
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