diff --git a/.yoi/tickets/00001KVXK0WDH/item.md b/.yoi/tickets/00001KVXK0WDH/item.md
index bf831fef..f93741db 100644
--- a/.yoi/tickets/00001KVXK0WDH/item.md
+++ b/.yoi/tickets/00001KVXK0WDH/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Reject legacy Plugin runtime in manifest and CLI diagnostics'
-state: 'queued'
+state: 'inprogress'
 created_at: '2026-06-24T19:51:56Z'
-updated_at: '2026-06-24T20:52:56Z'
+updated_at: '2026-06-24T20:53:45Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-24T20:11:58Z'
diff --git a/.yoi/tickets/00001KVXK0WDH/thread.md b/.yoi/tickets/00001KVXK0WDH/thread.md
index a468f7d6..2d1d9eed 100644
--- a/.yoi/tickets/00001KVXK0WDH/thread.md
+++ b/.yoi/tickets/00001KVXK0WDH/thread.md
@@ -108,3 +108,17 @@ Next action:
 - `queued -> inprogress` を記録してから worktree-workflow で `/home/hare/Projects/yoi/.worktree/00001KVXK0WDH-plugin-manifest-reject-legacy` を作成し、multi-agent-workflow で Coder/Reviewer sibling loop に進める。
 
 ---
+
+<!-- event: state_changed author: yoi-orchestrator at: 2026-06-24T20:53:45Z from: queued to: inprogress reason: orchestrator_acceptance_unblocked field: state -->
+
+## State changed
+
+Orchestrator acceptance: queued -> inprogress
+
+- 直前確認で `TicketShow` は state `queued`、derived blockers は空。
+- outgoing dependency `00001KVXK0WD3` は done / merged / reviewed / validated 済み。
+- accepted plan `orch-plan-20260624-205226-2` を確認した。
+- routing decision と IntentPacket は Ticket thread に記録済み。
+- これ以降に worktree-workflow で `/home/hare/Projects/yoi/.worktree/00001KVXK0WDH-plugin-manifest-reject-legacy` を作成し、multi-agent-workflow に接続する。
+
+---