diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index 6c6e87b..442dbac 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -1,6 +1,6 @@
 # ReleaseKit v0.9.0 implementation plan
 
-Status: Stages 1–4 complete; Stages 5–6 are not started.
+Status: Stages 1–5 complete; Stage 6 is not started.
 
 Implement these stages in integer order during one end-to-end sprint. The target
 audience is the Luna coding agent. Intermediate stages may temporarily leave
@@ -241,7 +241,13 @@ evidence.
 
 ## Stage 5: Verify integration source and selected file checks
 
-**Status:** not started.
+**Completed.** Both ckconfig and ckprompt checks passed with Go 1.26.8 on
+the Stage 4 snapshot using an external workspace and the temporary test-only Go
+shim. Their current-source suites, maintained consumers, and selected committed
+file checks passed; snapshot module files and Git state remained unchanged.
+Independent workspace-off release readiness remains unproven because the
+published core dependency lacks current symbols including `CompletionHint` and
+`Explanation`.
 
 Use the same clean disposable snapshot and temporary executable from Stage 4.
 The baseline independent dependency mismatch is outside this upgrade's scope.