diff --git a/.yoi/tickets/00001KVNKD56W/item.md b/.yoi/tickets/00001KVNKD56W/item.md
index 2dbfd3ae..210a92c0 100644
--- a/.yoi/tickets/00001KVNKD56W/item.md
+++ b/.yoi/tickets/00001KVNKD56W/item.md
@@ -2,7 +2,7 @@
 title: 'Workspace DB canonical schema design'
 state: 'inprogress'
 created_at: '2026-06-21T17:24:43Z'
-updated_at: '2026-06-22T08:50:06Z'
+updated_at: '2026-06-22T08:51:00Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-22T08:48:39Z'
diff --git a/.yoi/tickets/00001KVNKD56W/thread.md b/.yoi/tickets/00001KVNKD56W/thread.md
index 570cb5e7..fc1ba775 100644
--- a/.yoi/tickets/00001KVNKD56W/thread.md
+++ b/.yoi/tickets/00001KVNKD56W/thread.md
@@ -112,3 +112,28 @@ Validation plan:
 Human authorized queue routing from Workspace Dashboard. Ticket has a concrete schema-v0 design artifact and current workspace-server migration has a clear non-breaking alignment target, so Orchestrator accepts implementation/design alignment.
 
 ---
+
+<!-- event: implementation_report author: yoi-orchestrator at: 2026-06-22T08:51:00Z -->
+
+## Implementation report
+
+Implementation start report:
+
+- Created child implementation worktree:
+  - `/home/hare/Projects/yoi/.worktree/00001KVNKD56W-workspace-db-schema-v0`
+- Created branch:
+  - `impl/00001KVNKD56W-workspace-db-schema-v0`
+- Base commit:
+  - `f17a458a ticket: accept workspace db schema v0`
+- Confirmed tracked Ticket project records are visible in the child worktree。
+- Confirmed `.yoi/memory` has no tracked/untracked entries in the child worktree check。
+- Spawned sibling Coder Pod:
+  - `yoi-coder-00001KVNKD56W`
+- Coder scope:
+  - read: `/home/hare/Projects/yoi`
+  - write: `/home/hare/Projects/yoi/.worktree/00001KVNKD56W-workspace-db-schema-v0`
+
+Next action:
+- Wait for Coder implementation/design-alignment report, then spawn Reviewer read-only for the implementation diff。
+
+---