Record inheritance graph groundwork

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Implementation Plan: Import Discovery and Dependency-Ready Ordering
 
-Status: Stage 1 complete; 18 implementation stages remain.
+Status: Stages 1–2 complete; 17 implementation stages remain.
 
 ## Authority, baseline, and execution
 
@@ -248,6 +248,12 @@ Stage 3; do not expose an alternate public path.
 Acceptance: private scope tests demonstrate the shared schedule, ordinary/null
 relationships, real cycle sites, and preserved template values/ownership.
 
+Completion: implemented in commit `2718fbb` (`Separate inheritance graph
+analysis and application`). Verified with
+`go test ./internal/engine -run 'Inheritance|Inherited' -count=1` and
+`./scripts/check.sh`. The wired resolver retains parent-first ordering; Stage 3
+will integrate the shared dependency-ready schedule.
+
 ## Stage 3 — Integrate scheduled inheritance
 
 Replace the old sibling-frame resolution in the loading path with Stage 2's