Render ConfigKit show and validate through reporter

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Invocation reporting implementation plan
 
-Status: Stages 1–10 complete. Stage 11 is next.
+Status: Stages 1–11 complete. Stage 12 is next.
 
 ## Objective and authority
 
@@ -418,7 +418,7 @@ migration; Stage 20 will validate the assembled modules.
 
 ## Stage 11: Migrate configuration show and validate
 
-Status: pending.
+Status: complete.
 
 Primary files: [show.go](../../integrations/ckconfig/show.go),
 [validate.go](../../integrations/ckconfig/validate.go), and
@@ -449,6 +449,15 @@ deferred context ordering, rendering failures, and report write failures.
 Update tests of superseded outcome fields to observable reports and
 `Presentation`, rather than dropping their original failure protection.
 
+Configuration show and validate now submit provider messages through the shared
+reporter and render results through managed output. Tests retain acquisition
+ordering, shared state, YAML framing, cancellation with partial validation
+output, and cover warning visibility, terminal context, quiet rendering, and
+destination failures through `Presentation`. The ckconfig tests remain
+unrunnable because `sources.go`, `explain.go`, `diff.go`, and family wiring and
+tests still reference APIs scheduled for later migrations; Stage 20 will run the
+assembled suites.
+
 ## Stage 12: Migrate configuration sources, explain, and diff
 
 Status: pending.