diff --git a/.yoi/tickets/20260609-032533-001/item.md b/.yoi/tickets/20260609-032533-001/item.md
index f10b2dec..68154a99 100644
--- a/.yoi/tickets/20260609-032533-001/item.md
+++ b/.yoi/tickets/20260609-032533-001/item.md
@@ -2,7 +2,7 @@
 title: "セッション解析ツールを追加する"
 state: 'inprogress'
 created_at: "2026-06-09T03:25:33Z"
-updated_at: '2026-06-09T06:59:15Z'
+updated_at: '2026-06-09T07:00:26Z'
 queued_by: 'workspace-panel'
 queued_at: '2026-06-09T06:56:20Z'
 ---
diff --git a/.yoi/tickets/20260609-032533-001/thread.md b/.yoi/tickets/20260609-032533-001/thread.md
index 8c9cbc29..ac67b2dc 100644
--- a/.yoi/tickets/20260609-032533-001/thread.md
+++ b/.yoi/tickets/20260609-032533-001/thread.md
@@ -112,3 +112,24 @@ Validation:
 - `nix build .#yoi`.
 
 ---
+
+<!-- event: implementation_report author: orchestrator at: 2026-06-09T07:00:26Z -->
+
+## Implementation report
+
+Implementation routing started.
+
+Worktree/branch:
+- Worktree: `.worktree/session-analytics-tooling`
+- Branch: `session-analytics-tooling`
+- Base/routing commit: `c166140 ticket: route session analytics tooling`
+
+Spawned sibling Coder Pod:
+- `coder-session-analytics-tooling`
+- Scope: non-recursive read on parent workspace root plus recursive write limited to the child worktree.
+
+Routing context:
+- This Ticket is now the active implementation work.
+- Handoff explicitly requires synthetic/minimal session fixtures for validation and avoids reading private real local session contents.
+
+---