diff --git a/.yoi/tickets/00001KX7645ZS/item.md b/.yoi/tickets/00001KX7645ZS/item.md
index 5980cda8..a0eed3dc 100644
--- a/.yoi/tickets/00001KX7645ZS/item.md
+++ b/.yoi/tickets/00001KX7645ZS/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Remove backend worker observation replay'
-state: 'done'
+state: 'closed'
 created_at: '2026-07-10T23:34:39Z'
-updated_at: '2026-07-10T23:50:50Z'
+updated_at: '2026-07-10T23:50:55Z'
 assignee: null
 queued_by: 'yoi ticket'
 queued_at: '2026-07-10T23:35:04Z'
diff --git a/.yoi/tickets/00001KX7645ZS/resolution.md b/.yoi/tickets/00001KX7645ZS/resolution.md
new file mode 100644
index 00000000..9415c1a4
--- /dev/null
+++ b/.yoi/tickets/00001KX7645ZS/resolution.md
@@ -0,0 +1 @@
+Removed backend-local worker observation replay. Worker Console attach now receives Runtime Snapshot as bootstrap and then live upstream events only; workspace-server no longer stores/replays previous user_message/tool_result/text_delta frames.
diff --git a/.yoi/tickets/00001KX7645ZS/thread.md b/.yoi/tickets/00001KX7645ZS/thread.md
index 773de11f..61c2474e 100644
--- a/.yoi/tickets/00001KX7645ZS/thread.md
+++ b/.yoi/tickets/00001KX7645ZS/thread.md
@@ -68,4 +68,22 @@ Validation:
 State changed to `done`.
 
 
+---
+
+<!-- event: state_changed author: hare at: 2026-07-10T23:50:55Z from: done to: closed reason: closed field: state -->
+
+## State changed
+
+Ticket を closed にしました。
+
+
+---
+
+<!-- event: close author: hare at: 2026-07-10T23:50:55Z status: closed -->
+
+## 完了
+
+Removed backend-local worker observation replay. Worker Console attach now receives Runtime Snapshot as bootstrap and then live upstream events only; workspace-server no longer stores/replays previous user_message/tool_result/text_delta frames.
+
+
 ---