Document ConfigKit sibling inheritance

docs/roadmap/configkit.md

@@ -2,10 +2,11 @@
 
 **Last updated:** 2026-10-03
 
-**Status:** Planned; implementation has not begun. The dependency-only review
-passed Audita's existing offline test suite in a disposable checkout. That is
-baseline compatibility evidence, not completion of the feature. The
-[implementation plan](implementation.md) owns the ordered work and verification.
+**Status:** Complete. The implementation and tests are committed through
+`8175ed8`. Final documentation and example changes were included in the full
+build, test, example-validation, and local-link checks before the documentation
+completion commit. The [implementation plan](implementation.md) records the
+ordered work and verification.
 
 ## Purpose and Baseline
 

docs/roadmap/implementation.md

@@ -1,7 +1,7 @@
 # Implementation Plan: ConfigKit v0.5.0 Adoption
 
 **Last updated:** 2026-10-03
-**Status:** Ready for implementation.
+**Status:** Complete.
 **Audience:** Luna coding agent.
 
 ## Scope and Execution
@@ -195,6 +195,8 @@ risk, then commit the runtime/CLI verification unit.
 
 ## Stage 5 — Document Native Inheritance and Close the Adoption Unit
 
+**Completion:** Complete.
+
 **Primary files:** `docs/config.md`, `examples/configkit-inheritance.yml`,
 `docs/internal/cli-config.md`, and `docs/roadmap/configkit.md`. Update another
 canonical document only where an implemented statement actually changes.