diff --git a/.yoi/tickets/00001KVZKSTE2/item.md b/.yoi/tickets/00001KVZKSTE2/item.md
index 136e5a22..e9aa2674 100644
--- a/.yoi/tickets/00001KVZKSTE2/item.md
+++ b/.yoi/tickets/00001KVZKSTE2/item.md
@@ -2,7 +2,7 @@
 title: 'worker-runtimeにREST command serverを追加する'
 state: 'inprogress'
 created_at: '2026-06-25T14:44:02Z'
-updated_at: '2026-06-25T20:36:02Z'
+updated_at: '2026-06-25T20:38:01Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-25T16:39:39Z'
diff --git a/.yoi/tickets/00001KVZKSTE2/thread.md b/.yoi/tickets/00001KVZKSTE2/thread.md
index 35037bdc..b30b7b63 100644
--- a/.yoi/tickets/00001KVZKSTE2/thread.md
+++ b/.yoi/tickets/00001KVZKSTE2/thread.md
@@ -135,3 +135,23 @@ Dependency `00001KVZBCQH4` worker-runtime core は done。以前の waiting-capa
 これ以降、worktree creation / coder Worker routing などの implementation side effect に進める。
 
 ---
+
+<!-- event: implementation_report author: yoi-orchestrator at: 2026-06-25T20:38:01Z -->
+
+## Implementation report
+
+Implementation kickoff:
+
+- Worktree created: `/home/hare/Projects/yoi/.worktree/00001KVZKSTE2-worker-runtime-rest-server`
+- Branch: `work/00001KVZKSTE2-worker-runtime-rest-server`
+- Coder Worker spawned: `yoi-coder-00001KVZKSTE2-rest-server`
+
+Scope notes:
+- Coder has read access to the implementation worktree and non-recursive workspace root identity path needed by runtime startup.
+- Coder write scope is limited to `crates/worker-runtime/**`, root `Cargo.toml`, `Cargo.lock`, and `package.nix`.
+- Coder is instructed not to modify Ticket records and not to operate in root/orchestration worktrees.
+
+Dependent queued Tickets:
+- `00001KVZKSTJT`, `00001KVZSGT14`, `00001KW04A8K6`, and `00001KVZ9JGK0` remain queued with blocker notes until their prerequisite chain is done.
+
+---