diff --git a/.yoi/tickets/00001KX7NS2PD/item.md b/.yoi/tickets/00001KX7NS2PD/item.md
index 6cfbb7f3..806101c2 100644
--- a/.yoi/tickets/00001KX7NS2PD/item.md
+++ b/.yoi/tickets/00001KX7NS2PD/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Remove durable worker lifecycle_state'
-state: 'done'
+state: 'closed'
 created_at: '2026-07-11T04:08:12Z'
-updated_at: '2026-07-11T04:33:35Z'
+updated_at: '2026-07-11T04:34:08Z'
 assignee: null
 queued_by: 'yoi ticket'
 queued_at: '2026-07-11T04:09:06Z'
diff --git a/.yoi/tickets/00001KX7NS2PD/resolution.md b/.yoi/tickets/00001KX7NS2PD/resolution.md
new file mode 100644
index 00000000..14c6fc23
--- /dev/null
+++ b/.yoi/tickets/00001KX7NS2PD/resolution.md
@@ -0,0 +1 @@
+Removed durable `lifecycle_state` from Backend worker registry. Runtime remains the authority for live status/state; registry-only Workers project as archived, and cleanup planning uses live Runtime worker observation for running-linked checks. Existing DBs are migrated by schema v4 to remove the legacy column.
diff --git a/.yoi/tickets/00001KX7NS2PD/thread.md b/.yoi/tickets/00001KX7NS2PD/thread.md
index 56fd03e9..67514ab4 100644
--- a/.yoi/tickets/00001KX7NS2PD/thread.md
+++ b/.yoi/tickets/00001KX7NS2PD/thread.md
@@ -73,4 +73,22 @@ Validation:
 State changed to `done`.
 
 
+---
+
+<!-- event: state_changed author: hare at: 2026-07-11T04:34:08Z from: done to: closed reason: closed field: state -->
+
+## State changed
+
+Ticket を closed にしました。
+
+
+---
+
+<!-- event: close author: hare at: 2026-07-11T04:34:08Z status: closed -->
+
+## 完了
+
+Removed durable `lifecycle_state` from Backend worker registry. Runtime remains the authority for live status/state; registry-only Workers project as archived, and cleanup planning uses live Runtime worker observation for running-linked checks. Existing DBs are migrated by schema v4 to remove the legacy column.
+
+
 ---