diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index d797586..a4acc8a 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -593,6 +593,14 @@ guidance when the surface becomes available.
 Acceptance: public facade/import-boundary tests and representative engine/public
 equivalence cases pass; no internal type leaks through exported signatures.
 
+Completion: implemented in commit `2413161` (`Expose import defaults and
+selection evidence`). Verified with full root and engine tests, public facade,
+dependency boundary, source-equivalence, and documentation-link tests,
+`go vet ./...`, `go build ./...`, formatting, and `git diff --check`. The
+repository-wide `./scripts/check.sh` remains blocked only by the two
+prompt-catalog sequence-order expectations assigned to Stage 18. Stages 17–19
+remain.
+
 ## Stage 17 — Audit cross-feature lifecycle and ownership
 
 Review and fill meaningful gaps rather than adding a full Cartesian-product