diff --git a/.yoi/tickets/00001KVZBCQH4/item.md b/.yoi/tickets/00001KVZBCQH4/item.md
index 3ab19e34..c8ed5225 100644
--- a/.yoi/tickets/00001KVZBCQH4/item.md
+++ b/.yoi/tickets/00001KVZBCQH4/item.md
@@ -2,7 +2,7 @@
 title: 'worker-runtime core crateと組み込みRuntime APIを作る'
 state: 'done'
 created_at: '2026-06-25T12:17:05Z'
-updated_at: '2026-06-25T16:53:46Z'
+updated_at: '2026-06-25T16:54:19Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-25T16:20:10Z'
diff --git a/.yoi/tickets/00001KVZBCQH4/thread.md b/.yoi/tickets/00001KVZBCQH4/thread.md
index 224ea424..2427048d 100644
--- a/.yoi/tickets/00001KVZBCQH4/thread.md
+++ b/.yoi/tickets/00001KVZBCQH4/thread.md
@@ -686,3 +686,23 @@ Scope:
 - HTTP/WS/FS/Backend integration/config bundle sync は Non-goals として未実装。
 
 ---
+
+<!-- event: implementation_report author: yoi-orchestrator at: 2026-06-25T16:54:19Z -->
+
+## Implementation report
+
+Cleanup report:
+
+- Child Workers stopped and scope reclaimed:
+  - `yoi-coder-00001KVZBCQH4-worker-runtime`
+  - `yoi-coder-00001KVZBCQH4-runtime-packaging`
+  - `yoi-reviewer-00001KVZBCQH4-worker-runtime`
+- Child implementation worktree removed:
+  - `/home/hare/Projects/yoi/.worktree/00001KVZBCQH4-worker-runtime-core`
+- Child implementation branch removed:
+  - `work/00001KVZBCQH4-worker-runtime-core`
+
+Remaining note:
+- Historical worker-rename child worktree remains separate and was not touched by this cleanup.
+
+---