diff --git a/.yoi/tickets/00001KVWECEQG/item.md b/.yoi/tickets/00001KVWECEQG/item.md
index 741bacfc..d36047f4 100644
--- a/.yoi/tickets/00001KVWECEQG/item.md
+++ b/.yoi/tickets/00001KVWECEQG/item.md
@@ -2,7 +2,7 @@
 title: 'Abstract Worker runtime registry and overview reporting'
 state: 'inprogress'
 created_at: '2026-06-24T09:11:38Z'
-updated_at: '2026-06-24T10:37:43Z'
+updated_at: '2026-06-24T10:38:50Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-24T09:22:55Z'
diff --git a/.yoi/tickets/00001KVWECEQG/thread.md b/.yoi/tickets/00001KVWECEQG/thread.md
index 0c18ae6e..0b3c0f3a 100644
--- a/.yoi/tickets/00001KVWECEQG/thread.md
+++ b/.yoi/tickets/00001KVWECEQG/thread.md
@@ -152,3 +152,16 @@ Orchestrator acceptance: queued -> inprogress
 - これ以降に worktree-workflow で `/home/hare/Projects/yoi/.worktree/00001KVWECEQG-worker-runtime-registry` を作成し、multi-agent-workflow に接続する。
 
 ---
+
+<!-- event: implementation_report author: yoi-orchestrator at: 2026-06-24T10:38:50Z -->
+
+## Implementation report
+
+Implementation orchestration update:
+
+- worktree-workflow に従い、implementation worktree `/home/hare/Projects/yoi/.worktree/00001KVWECEQG-worker-runtime-registry` と branch `work/00001KVWECEQG-worker-runtime-registry` を作成した。
+- child worktree では tracked `.yoi` project records を見える状態にし、`.yoi/memory`、local/runtime/log/lock/secret-like `.yoi` paths を sparse-checkout で除外する方針にした。
+- Coder Pod `yoi-coder-00001KVWECEQG-worker-registry` を sibling として起動した。write scope は child worktree に限定し、runtime workspace root `/home/hare/Projects/yoi` は startup 要件を満たすため non-recursive read のみにした。
+- Coder には root/original workspace と orchestration worktree で read/write/validation/git operation を行わないよう明示した。
+
+---