Test comparison preparation through provider behavior

docs/roadmap/remediation.md

@@ -1,6 +1,6 @@
 # Configuration comparison review remediation
 
-Status: two findings complete; two open. This document tracks required
+Status: three findings complete; one open. This document tracks required
 follow-up work and its completion evidence.
 
 ## Review baseline and scope
@@ -122,7 +122,7 @@ No runtime enforcement or consumer requirement was added.
 
 ## R-3: Make preparation tests reject failure without freezing private storage
 
-**Status:** Open. **Priority:** Medium. **Category:** Test quality /
+**Status:** Complete. **Priority:** Medium. **Category:** Test quality /
 inadvertently strengthened implementation invariants.
 
 **Evidence:** In
@@ -151,6 +151,17 @@ rejected by the test. Tests protect the paired provider/lifecycle contract
 without requiring a particular private plan layout. Reuse existing behavioral
 coverage where it already proves the relevant fact.
 
+**Completed 2026-10-12:** The valid equal-selection test now requires
+`OutcomeSuccess`, so an operational failure cannot pass. The storage-layout test
+was replaced with an assembled invocation that observes the provider request,
+correlates each input with its checked selection, verifies both checks precede
+shared state and provider execution, and verifies ordinary acquisition is unused.
+It does not inspect the private plan or assign particular factory IDs to sides.
+Existing presence, conversion, collection ownership, zero-value, alias, and
+failure-classification cases remain. `go test ./...` passed in
+`integrations/ckconfig`, including the simple consumer; formatting, diff, and
+whitespace review passed.
+
 ## R-4: Reconcile the feature roadmap's completion status
 
 **Status:** Open. **Priority:** Low. **Category:** Documentation divergence.