implementation.md: the v0.1.0 publish record — core-first order per the checklist, tag pushed, the class-1 window closed

docs/plans/implementation.md

@@ -4,7 +4,10 @@ last_updated: "2026-10-11 (wave 8 implemented + reviewed — the release
 gate passed and the pre-release general review (004) followed it,
 fixing one high-severity slot-poisoning defect, two contract-observable
 divergences, and their suite/test/doc pins; all gates re-run green;
-implementation complete pending the user's manual `cargo publish`.)"
+**published**: v0.1.0 shipped 2026-10-11 — core first, then the three
+engines, per `tasks/release-publish-prep.md`'s checklist of record,
+tag `v0.1.0` created and pushed; the class-1 contract-change window
+(ADR-017 §2) is closed permanently.)"
 ---
 
 # alkstore — Implementation plan