Complete the ConfigKit migration audit

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # ConfigKit Adoption Implementation Plan
 
-Status: Pending
+Status: Complete
 
 Implement the [ConfigKit adoption roadmap](configkit-adoption.md) in the order
 below. The target is Narratio v2.0.0: ConfigKit v0.1.1, the reduced platform
@@ -468,7 +468,17 @@ Their identities, family members, origins, and testing overrides agree.
 
 ## Stage 11 — Verify the complete migration and remove remaining scaffolding
 
-Status: Pending
+Status: Complete
+
+Completion: Audited the accepted roadmap and the full change set from `1558c9c`;
+no legacy configuration loader, profile/composition traversal, presence store,
+custom secrets loader, or production YAML decoder remains. The migration removes a
+net 1,235 production and 843 test Go lines; remaining configuration code owns domain
+defaults, normalization, validation, expansion, provenance, and safe projections.
+Go 1.26.7 module hygiene, tests, race tests, vet, build, documentation, examples,
+and the v2.0.0 release-candidate checker pass. Linux amd64 was tested natively;
+Linux arm64 and macOS arm64 release assets were cross-built, with native macOS
+arm64 validation remaining best effort and outside the release gate.
 
 Read: the whole feature roadmap, completed stage notes, and the current test and
 release procedures. Review the diff from the commit introducing this plan.