diff --git a/.yoi/tickets/00001KVNGJPRG/artifacts/orchestration-plan.jsonl b/.yoi/tickets/00001KVNGJPRG/artifacts/orchestration-plan.jsonl
new file mode 100644
index 00000000..5f2c9ee2
--- /dev/null
+++ b/.yoi/tickets/00001KVNGJPRG/artifacts/orchestration-plan.jsonl
@@ -0,0 +1 @@
+{"id":"orch-plan-20260621-164056-1","ticket_id":"00001KVNGJPRG","kind":"do_not_parallelize","related_ticket":"00001KVNG9B9Z","note":"Repository/objective pages and sidebar navigation both modify the Workspace SPA navigation/layout surface, especially `web/workspace/src/routes/+page.svelte` and route/component structure. Start this Ticket after `00001KVNG9B9Z` lands or after its implementation diff is known enough to route a non-conflicting continuation.","author":"yoi-orchestrator","at":"2026-06-21T16:40:56Z"}
diff --git a/.yoi/tickets/00001KVNGJPRG/item.md b/.yoi/tickets/00001KVNGJPRG/item.md
index 5f95d343..797bd272 100644
--- a/.yoi/tickets/00001KVNGJPRG/item.md
+++ b/.yoi/tickets/00001KVNGJPRG/item.md
@@ -2,7 +2,7 @@
 title: 'Workspace web: repository and objective pages'
 state: 'queued'
 created_at: '2026-06-21T16:35:19Z'
-updated_at: '2026-06-21T16:40:35Z'
+updated_at: '2026-06-21T16:41:09Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-06-21T16:40:35Z'
diff --git a/.yoi/tickets/00001KVNGJPRG/thread.md b/.yoi/tickets/00001KVNGJPRG/thread.md
index 626f5957..0122decf 100644
--- a/.yoi/tickets/00001KVNGJPRG/thread.md
+++ b/.yoi/tickets/00001KVNGJPRG/thread.md
@@ -30,4 +30,26 @@ Marked ready by `yoi ticket state`.
 Ticket を `workspace-panel` が queued にしました。
 
 
+---
+
+<!-- event: decision author: yoi-orchestrator at: 2026-06-21T16:41:09Z -->
+
+## Decision
+
+Routing decision: `wait_do_not_parallelize_with_sidebar`
+
+Reason:
+- Ticket body is implementation-ready in isolation, but it is directly coupled to the currently active sidebar navigation work `00001KVNG9B9Z`。
+- Relations show this Ticket is related to `00001KVNG9B9Z` with note: “Sidebar navigation should link to repository and objective pages”。
+- `00001KVNG9B9Z` is already `inprogress`, has a live Coder Pod, and is expected to change `web/workspace/src/routes/+page.svelte` / sidebar component structure。
+- Starting this Ticket in parallel now would likely produce overlapping route/layout/sidebar changes and non-trivial semantic merge work, rather than independent implementation。
+- Host/Worker API work `00001KVNEKH9Q` just landed, further increasing the need to base the page/navigation work on current SPA state。
+
+Decision:
+- Do not create a worktree or spawn Coder for `00001KVNGJPRG` yet。
+- Leave Ticket `queued` and record an orchestration `do_not_parallelize` note with `00001KVNG9B9Z`。
+- Re-route this Ticket after sidebar work lands, or if sidebar implementation report shows a stable component boundary that makes repository/objective pages non-conflicting。
+
+No implementation side effects were performed for this Ticket。
+
 ---