Detach schemas without provider value limits

docs/roadmap/implementation.md

@@ -272,6 +272,13 @@ schema/smoke tests. Resolve Stage 8's deferred checks.
 
 ## Stage 10: Remove Copier-Derived Schema Budgets
 
+**Completed:** Schema documents are detached using trusted cloning rather than
+provider-value validation. A real loaded schema with more than 100,000 annotation
+values prepares successfully and its public details are independent; deep
+prepared-plan isolation is also covered. Go 1.27.3 `go test ./internal/usecase
+./internal/validate ./internal/jsonvalue . -run 'Schema|Prepared|Copy|CloneTrusted'`
+passed.
+
 **Finding:** 7. **Files:** `internal/usecase/runner.go`, `prepared_execution.go`, schema/preparation tests.
 
 1. Replace schema-document validation/copying in