diff --git a/.yoi/tickets/00001KWHJ0XH6/item.md b/.yoi/tickets/00001KWHJ0XH6/item.md
index 0051bbcf..c1ebfd95 100644
--- a/.yoi/tickets/00001KWHJ0XH6/item.md
+++ b/.yoi/tickets/00001KWHJ0XH6/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Workspace BrowserにSettings/Admin画面のshellとnavigationを追加する'
-state: 'inprogress'
+state: 'closed'
 created_at: '2026-07-02T13:59:17Z'
-updated_at: '2026-07-02T14:37:21Z'
+updated_at: '2026-07-02T14:38:34Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-07-02T14:24:54Z'
diff --git a/.yoi/tickets/00001KWHJ0XH6/resolution.md b/.yoi/tickets/00001KWHJ0XH6/resolution.md
new file mode 100644
index 00000000..e9dbfc20
--- /dev/null
+++ b/.yoi/tickets/00001KWHJ0XH6/resolution.md
@@ -0,0 +1,30 @@
+Workspace Browser に Settings/Admin shell と navigation を追加し、manual fallback review 後に orchestration branch へ merge した。
+
+実装内容:
+- `/settings` route を追加。
+- Sidebar header の gear link と Sidebar 内 Settings section から Settings / Admin へ移動できるようにした。
+- Settings / Admin shell を追加し、以下の sections を配置。
+  - Runtime Connections（placeholder）
+  - Backend Config（placeholder）
+  - Workspace Identity（read-only）
+- Runtime Connections / Backend Config は明確な placeholder とし、Runtime connection add/delete/test/persist、Backend config editor、secret UI、settings mutation API は実装していない。
+- Workspace Identity は opaque workspace id / display name / record authority context の read-only 表示に限定し、raw filesystem path を出していない。
+- browser user / role / permission / multi-user authorization model は存在しないこと、admin role を作らないことを明記。
+- sanitized diagnostics / restart-required / read-only until typed APIs exist の表示 pattern を追加。
+- Settings shell model tests を追加し、navigation、no fake browser admin model、placeholder boundaries、raw authority leak avoidance を確認。
+- Existing Worker Console / Sidebar route は維持。
+
+Integrated commit:
+- `c0c6880b1a00ec367910267a3d2a0595839b3d5b feat: add settings admin shell`
+- merge: `fdad94af merge: settings admin shell`
+
+Validation:
+- `deno run -A npm:@sveltejs/kit@2.49.4 sync`: success
+- `cd web/workspace && deno task test`: success (`10 passed`)
+- `cd web/workspace && deno task check`: success
+- `cd web/workspace && deno task build`: success
+- `git diff --check`: success
+
+Operational note:
+- Coder/Reviewer Pod spawning was unavailable in the current Orchestrator process because `SpawnPod` tried to execute `/home/hare/.cargo/bin/yoi (deleted) pod`. This narrow web-only Ticket was implemented and reviewed directly by Orchestrator as a recorded fallback.
+- User instructed not to use `StopPod` for now after repeated stop/hang symptoms. Cleanup will remove only the child implementation worktree / branch.
\ No newline at end of file
diff --git a/.yoi/tickets/00001KWHJ0XH6/thread.md b/.yoi/tickets/00001KWHJ0XH6/thread.md
index dd527e72..6b904569 100644
--- a/.yoi/tickets/00001KWHJ0XH6/thread.md
+++ b/.yoi/tickets/00001KWHJ0XH6/thread.md
@@ -220,3 +220,100 @@ Validation:
 ブロッカーはない。
 
 ---
+
+<!-- event: implementation_report author: yoi-orchestrator at: 2026-07-02T14:38:10Z -->
+
+## Implementation report
+
+Merge / validation report:
+
+Implementation branch was integrated into the orchestration branch after manual fallback review approval.
+
+Integrated commit:
+- `c0c6880b1a00ec367910267a3d2a0595839b3d5b feat: add settings admin shell`
+
+Merge commit:
+- `fdad94af merge: settings admin shell`
+
+Validation in orchestration worktree:
+- `deno run -A npm:@sveltejs/kit@2.49.4 sync`: success
+- `cd web/workspace && deno task test`: success (`10 passed`)
+- `cd web/workspace && deno task check`: success
+- `cd web/workspace && deno task build`: success
+- `git diff --check`: success
+
+Outcome:
+- Added `/settings` route and Settings / Admin shell.
+- Added Sidebar navigation entry and header gear link to Settings / Admin.
+- Added Runtime Connections / Backend Config / Workspace Identity sections.
+- Runtime Connections and Backend Config remain explicit placeholders with no mutation API or persistence behavior.
+- Workspace Identity is read-only and avoids raw path exposure.
+- The shell explicitly states that no browser user/role/permission/multi-user authorization model exists and does not create an admin role.
+- Added sanitized diagnostic / restart-required / read-only-until-typed-APIs patterns.
+- Existing Worker Console / Sidebar routes remain intact.
+
+Operational caveat:
+- Coder/Reviewer Pod spawning was unavailable in the current process because `SpawnPod` tried to execute `/home/hare/.cargo/bin/yoi (deleted) pod`. Orchestrator implemented and reviewed this narrow web-only change directly, then validated in the orchestration worktree.
+
+---
+
+<!-- event: state_changed author: yoi-orchestrator at: 2026-07-02T14:38:19Z from: inprogress to: done reason: implementation_merged_and_validated field: state -->
+
+## State changed
+
+Manual fallback review後に implementation branch を orchestration branch へ merge し、要求された web validation が成功したため done に遷移する。
+
+Validation:
+- `deno run -A npm:@sveltejs/kit@2.49.4 sync`: success
+- `cd web/workspace && deno task test`: success (`10 passed`)
+- `cd web/workspace && deno task check`: success
+- `cd web/workspace && deno task build`: success
+- `git diff --check`: success
+
+---
+
+<!-- event: state_changed author: hare at: 2026-07-02T14:38:34Z from: done to: closed reason: closed field: state -->
+
+## State changed
+
+Ticket を closed にしました。
+
+
+---
+
+<!-- event: close author: hare at: 2026-07-02T14:38:34Z status: closed -->
+
+## 完了
+
+Workspace Browser に Settings/Admin shell と navigation を追加し、manual fallback review 後に orchestration branch へ merge した。
+
+実装内容:
+- `/settings` route を追加。
+- Sidebar header の gear link と Sidebar 内 Settings section から Settings / Admin へ移動できるようにした。
+- Settings / Admin shell を追加し、以下の sections を配置。
+  - Runtime Connections（placeholder）
+  - Backend Config（placeholder）
+  - Workspace Identity（read-only）
+- Runtime Connections / Backend Config は明確な placeholder とし、Runtime connection add/delete/test/persist、Backend config editor、secret UI、settings mutation API は実装していない。
+- Workspace Identity は opaque workspace id / display name / record authority context の read-only 表示に限定し、raw filesystem path を出していない。
+- browser user / role / permission / multi-user authorization model は存在しないこと、admin role を作らないことを明記。
+- sanitized diagnostics / restart-required / read-only until typed APIs exist の表示 pattern を追加。
+- Settings shell model tests を追加し、navigation、no fake browser admin model、placeholder boundaries、raw authority leak avoidance を確認。
+- Existing Worker Console / Sidebar route は維持。
+
+Integrated commit:
+- `c0c6880b1a00ec367910267a3d2a0595839b3d5b feat: add settings admin shell`
+- merge: `fdad94af merge: settings admin shell`
+
+Validation:
+- `deno run -A npm:@sveltejs/kit@2.49.4 sync`: success
+- `cd web/workspace && deno task test`: success (`10 passed`)
+- `cd web/workspace && deno task check`: success
+- `cd web/workspace && deno task build`: success
+- `git diff --check`: success
+
+Operational note:
+- Coder/Reviewer Pod spawning was unavailable in the current Orchestrator process because `SpawnPod` tried to execute `/home/hare/.cargo/bin/yoi (deleted) pod`. This narrow web-only Ticket was implemented and reviewed directly by Orchestrator as a recorded fallback.
+- User instructed not to use `StopPod` for now after repeated stop/hang symptoms. Cleanup will remove only the child implementation worktree / branch.
+
+---