<!-- event: create author: "yoi ticket" at: 2026-06-11T05:15:14Z -->

## 作成

LocalTicketBackend によって作成されました。

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<!-- event: plan author: intake at: 2026-06-11T07:40:32Z -->

## Plan

## Intake refinement

Readiness: implementation_ready

この Ticket は既存 Ticket `00001KTTB479X` の follow-up 境界として明確であり、Panel / workspace Orchestrator lifecycle で dedicated orchestration worktree を実際に作成・再利用し、その worktree を Orchestrator の runtime workspace / Ticket backend root として起動する具体的な work item になっている。

Orchestrator が routing できる判断材料:
- 目的、背景、要件、受け入れ条件、非目標が Ticket body に揃っている。
- `role_workspace_root` / `original_workspace_root` / `implementation_worktree_root` / `merge_target_workspace_root` の binding boundary が明記されている。
- implementation worktree は original workspace root 配下の `.worktree/<ticket-or-task>` に置き、orchestration worktree の子にしないことが invariant として明確。
- dirty / inconsistent / conflicting orchestration worktree は診断して止め、破壊的 cleanup や上書きをしないことが明確。
- 既存 worktree reuse、root population、`SpawnConfig.workspace_root`、prompt root context、Panel diagnostics について testable な acceptance criteria がある。

Risk flags / reviewer focus:
- `git-worktree`
- `ticket-backend`
- `workspace-state`
- `authority-boundary`
- `persistence`
- `panel-ux`

Open questions:
- blocking な未決定点はない。path / branch naming の具体実装、reuse validation helper の分割、UI diagnostic の表示場所は Ticket 内の制約を満たす範囲で implementation latitude として扱える。

Escalation conditions:
- Ticket backend を Git 外 store に移す必要が出た場合。
- Orchestrator push automation、破壊的 cleanup、main workspace publication policy の全面設計が必要になった場合。
- live conflicting Pod / inconsistent worktree の安全な診断だけでは足りず、人間判断が必要になった場合。

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<!-- event: intake_summary author: intake at: 2026-06-11T07:40:39Z -->

## Intake summary

既存 Ticket を確認し、00001KTTB479X の closed follow-up として dedicated orchestration worktree を Panel/role launcher から作成・再利用し、Orchestrator の workspace root / Ticket backend root として起動する concrete work item と判断した。blocking な未決定点はなく、git-worktree / ticket-backend / workspace-state / authority-boundary / persistence / panel-ux を reviewer focus として残したうえで implementation_ready。実装は破壊的 cleanup、push automation、Git 外 Ticket store 移行、main workspace publication policy の全面設計を含めない。

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<!-- event: state_changed author: intake at: 2026-06-11T07:40:39Z from: planning to: ready reason: intake_ready field: state -->

## State changed

Intake により要件・境界・受け入れ条件・risk focus が routing 可能な粒度まで確認されたため ready に遷移する。

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<!-- event: state_changed author: workspace-panel at: 2026-06-11T07:41:37Z from: ready to: queued reason: queued field: state -->

## State changed

Ticket を `workspace-panel` が queued にしました。


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<!-- event: state_changed author: orchestrator at: 2026-06-11T07:42:27Z from: queued to: inprogress reason: orchestrator_queue_acceptance field: state -->

## State changed

Queue acceptance: relation query has no blockers, orchestration-plan query has no records, workspace has only this Ticket's panel queue update, and the Ticket is implementation_ready with concrete acceptance criteria for Panel Orchestrator lifecycle root separation. Standing merge-completion authorization is in effect after reviewer approval and safe-workspace checks. Implementation side effects may proceed after this recorded acceptance.

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<!-- event: plan author: orchestrator at: 2026-06-11T07:42:27Z -->

## Plan

Routing decision: implementation_ready

Reason:
- Ticket is `queued`, user/panel authorized routing, relation query has no blockers, and orchestration-plan query has no existing records.
- Workspace dirty state before acceptance is limited to this Ticket's queue update.
- The Ticket has concrete requirements and acceptance criteria for Panel Orchestrator lifecycle dedicated orchestration worktree creation/reuse, root population, safe diagnostics, and tests.

Evidence checked:
- Ticket body/thread/artifacts.
- `TicketRelationQuery`: no blockers.
- `TicketOrchestrationPlanQuery`: no records before this routing pass.
- Workspace/worktree/branch state: main worktree only before acceptance.
- Visible Pods: no active implementation child Pods; restorable Intake peers only.

IntentPacket:
- Intent: make Panel Orchestrator launch create/reuse a dedicated orchestration worktree under the original workspace root and launch Orchestrator with that worktree as runtime workspace/Ticket backend root while preserving original/target roots for implementation worktree creation and merge-completion.
- Binding decisions / invariants: filesystem Ticket backend remains; no Git-external Ticket store; main workspace drafts are not implicit Orchestrator queue; implementation worktrees stay under original workspace `.worktree/<ticket-or-task>` as siblings of orchestration worktree; do not destructively cleanup dirty/unknown orchestration worktrees; no push automation; `SpawnConfig.workspace_root` for Orchestrator must be orchestration worktree.
- Requirements / acceptance criteria: stable collision-safe path/branch naming; safe create/reuse/fail diagnostics; `TicketRoleLaunchContext` roots population; prompt root context remains visible; Panel diagnostics make Orchestrator/Ticket backend root visible; tests for naming/reuse/unsafe diagnostics/root population/spawn config/prompt.
- Implementation latitude: exact helper placement and UI diagnostic wording are flexible if safety and root semantics are preserved.
- Escalate if implementation requires changing Ticket backend authority, adding destructive cleanup, or introducing push automation.
- Validation: focused panel/client tests, `cargo fmt --check`, `git diff --check`, `target/debug/yoi ticket doctor`, and `nix build .#yoi`.

---

<!-- event: implementation_report author: orchestrator at: 2026-06-11T07:54:44Z -->

## Implementation report

Implementation report

Branch/worktree: `panel-orchestration-worktree` / `.worktree/panel-orchestration-worktree`
Commit:
- `47ce4030 feat: launch orchestrator from worktree`

Summary:
- Panel Orchestrator spawn path now prepares a stable dedicated orchestration worktree under `<original-workspace-root>/.worktree/orchestration/<workspace-orchestrator-pod-name>` before spawning a workspace Orchestrator.
- The orchestration worktree uses a stable branch `orchestration/<workspace-orchestrator-pod-name>` and is created with `git worktree add`; if it already exists as a clean Git worktree it is reused.
- Unsafe existing paths are diagnosed without cleanup: non-directory, non-Git worktree, or dirty orchestration worktree state returns an unavailable Orchestrator panel state with a clear error.
- Orchestrator `SpawnConfig.workspace_root` is now the dedicated orchestration worktree root, while `TicketRoleLaunchContext` receives the original workspace root and target workspace root so implementation worktrees and merge-completion still target the original workspace.
- Spawn diagnostics include whether the orchestration worktree was created or reused and the path/branch used.
- Added tests for stable layout naming, root population, invalid existing path diagnostics/no cleanup, create/reuse behavior, dirty reuse refusal, and existing launch-plan tests.

Validation run in branch:
- `cargo fmt --check` passed.
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check` passed.
- `/home/hare/Projects/yoi/target/debug/yoi ticket doctor` passed.
- `nix build .#yoi` passed.

Notes:
- This keeps filesystem Ticket backend authority and does not add push automation or destructive cleanup. Dirty/unknown orchestration worktree state must be handled explicitly by the operator.

---

<!-- event: review author: reviewer-panel-orchestration-worktree at: 2026-06-11T08:04:39Z status: request_changes -->

## Review: request changes

Branch-local review verdict: request_changes

Blocker:
- Existing expected-path Git worktrees are only checked with `git rev-parse --is-inside-work-tree`; the implementation does not verify that the existing worktree is on the expected `orchestration/<workspace-orchestrator-pod-name>` branch or belongs to the same Git repository/common dir as the original workspace. A conflicting worktree or unrelated repo at the expected path could be reused as the Orchestrator runtime root.

Non-blocking notes:
- Path naming, create/reuse flow, dirty refusal, and root population are directionally correct.
- Reviewer recommended branch/common-dir validation and tests for wrong-branch and unrelated-repo expected-path cases.

Validation run by reviewer before request_changes:
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check $(git merge-base HEAD develop)..HEAD` passed.
- `/home/hare/Projects/yoi/target/debug/yoi ticket doctor` passed.
- `nix build .#yoi` passed.

No files were modified by reviewer.

---

<!-- event: implementation_report author: orchestrator at: 2026-06-11T08:04:39Z -->

## Implementation report

Fix-loop implementation report

Reviewer blocker fixed in amended implementation commit `67f9009b`:
- Existing expected-path orchestration worktrees now validate current branch equals the expected `orchestration/<workspace-orchestrator-pod-name>` branch before reuse.
- Existing expected-path orchestration worktrees now validate `git rev-parse --git-common-dir` matches the original workspace's Git common dir, so an unrelated repository at the expected path is rejected.
- Wrong-branch and unrelated-repo cases return diagnostics without deleting files.
- Added tests for wrong-branch expected path and unrelated repository with expected branch at the expected path.

Validation after fix:
- `cargo fmt --check` passed.
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p tui existing_ --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check` passed.
- `/home/hare/Projects/yoi/target/debug/yoi ticket doctor` passed.
- `nix build .#yoi` passed.

Reviewer `reviewer-panel-orchestration-worktree` has been asked to re-review the amended branch.

---

<!-- event: review author: reviewer-panel-orchestration-worktree at: 2026-06-11T08:08:18Z status: request_changes -->

## Review: request changes

Branch-local review verdict: request_changes

Blocker:
- `ensure_orchestration_worktree` still treats “inside a Git worktree” as “is the dedicated orchestration worktree”. Because the expected path is under the original repo, a plain directory at `.worktree/orchestration/<stem>` can inherit the parent repo. If the original workspace is currently on the expected branch, branch/common-dir checks pass even though `rev-parse --show-toplevel` is the original workspace root, not the expected path.
- Expected fix: verify canonical `git rev-parse --show-toplevel` equals canonical `layout.path`; reject mismatch without cleanup. Add a test for the inherited-parent-worktree case.

Non-blocking notes:
- Previous wrong-branch and unrelated-repo blocker cases are now covered and rejected without deletion.
- Spawn/root separation still looks correct: Orchestrator launch context uses orchestration `workspace_root`, with original/target roots preserved for prompt routing and implementation worktree root calculation.

Validation run by reviewer:
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p tui existing_ --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check $(git merge-base HEAD develop)..HEAD` passed.
- `/home/hare/Projects/yoi/target/debug/yoi ticket doctor` passed.
- `nix build .#yoi --no-link` passed.

---

<!-- event: implementation_report author: orchestrator at: 2026-06-11T08:10:46Z -->

## Implementation report

Second fix-loop implementation report

Reviewer blocker fixed in amended implementation commit `00e11b3d`:
- Existing expected-path orchestration directories now validate canonical `git rev-parse --show-toplevel` equals the canonical expected orchestration worktree path before branch/common-dir/clean checks.
- A plain directory under the parent repository that merely inherits the parent's Git worktree is rejected as “not the worktree root” and left untouched.
- Added test `inherited_parent_worktree_directory_is_rejected_without_cleanup` for this exact case.

Validation after fix:
- `cargo fmt --check` passed.
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p tui existing_ --lib` passed.
- `cargo test -p tui inherited_parent_worktree_directory_is_rejected_without_cleanup --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check` passed.
- `/home/hare/Projects/yoi/target/debug/yoi ticket doctor` passed.
- `nix build .#yoi` passed.

Reviewer `reviewer-panel-orchestration-worktree` has been asked to re-review the amended branch.

---

<!-- event: review author: reviewer-panel-orchestration-worktree at: 2026-06-11T08:12:54Z status: approve -->

## Review: approve

Branch-local review verdict: approve

Blockers: none.

Reviewer confirmed unsafe reuse blockers are resolved:
- Expected-path reuse now checks worktree top-level, expected branch, same Git common dir, and clean status.
- Inherited parent worktree, wrong branch, and unrelated repository cases are covered and rejected without cleanup.
- Orchestrator spawn root and `TicketRoleLaunchContext` original/target/orchestration root separation satisfy the Ticket requirements.
- Panel report/diagnostics expose path/branch/status/failure reason.

Validation run by reviewer:
- `cargo fmt --check` passed.
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p tui existing_ --lib` passed.
- `cargo test -p tui inherited_parent_worktree_directory_is_rejected_without_cleanup --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check $(git merge-base HEAD develop)..HEAD` passed.
- `/home/hare/Projects/yoi/target/debug/yoi ticket doctor` passed.
- `nix build .#yoi --no-link` passed.

---

<!-- event: review author: orchestrator at: 2026-06-11T08:14:15Z status: approve -->

## Review: approve

Main-branch review/merge-completion approval.

Verified before merge:
- Merge target matched branch `panel-orchestration-worktree`, worktree `.worktree/panel-orchestration-worktree`, and implementation commit `00e11b3d`.
- Branch-local reviewer `reviewer-panel-orchestration-worktree` approved after unsafe-reuse blocker fixes.
- Main workspace was clean before merge.
- User has standing authorization to proceed through merge-completion when reviewer approval and safety checks pass.

Merged:
- `git merge --no-ff panel-orchestration-worktree -m "merge: panel orchestration worktree"`
- Merge commit: `735b0c04 merge: panel orchestration worktree`

Post-merge validation:
- `cargo fmt --check` passed.
- `cargo test -p tui orchestration --lib` passed.
- `cargo test -p tui existing_ --lib` passed.
- `cargo test -p tui inherited_parent_worktree_directory_is_rejected_without_cleanup --lib` passed.
- `cargo test -p client ticket_role --lib` passed.
- `git diff --check` passed.
- `target/debug/yoi ticket doctor` passed.
- typed `TicketDoctor` reported 0 errors and 3 pre-existing diagnostics.
- `nix build .#yoi` passed.

Result: approve.

---

<!-- event: state_changed author: orchestrator at: 2026-06-11T08:14:15Z from: inprogress to: done reason: merged_and_validated field: state -->

## State changed

Merged branch `panel-orchestration-worktree` with merge commit `735b0c04`; branch-local reviewer approved after unsafe-reuse fixes and post-merge validation passed (`cargo fmt --check`, `cargo test -p tui orchestration --lib`, `cargo test -p tui existing_ --lib`, `cargo test -p tui inherited_parent_worktree_directory_is_rejected_without_cleanup --lib`, `cargo test -p client ticket_role --lib`, `git diff --check`, `target/debug/yoi ticket doctor`, typed `TicketDoctor` 0 errors / 3 pre-existing diagnostics, `nix build .#yoi`).

---

<!-- event: state_changed author: hare at: 2026-06-11T08:14:37Z from: done to: closed reason: closed field: state -->

## State changed

Ticket を closed にしました。


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<!-- event: close author: hare at: 2026-06-11T08:14:37Z status: closed -->

## 完了

完了しました。

実施内容:
- Panel Orchestrator spawn path で、original workspace root 配下に専用 orchestration worktree を自動作成・再利用するようにしました。
  - path: `<original-workspace-root>/.worktree/orchestration/<workspace-orchestrator-pod-name>`
  - branch: `orchestration/<workspace-orchestrator-pod-name>`
- clean な既存 orchestration Git worktree は reuse します。
- unsafe state は削除せず diagnostic で拒否します。
  - path が directory でない
  - Git worktree でない
  - expected branch でない
  - original workspace と Git common dir が異なる
  - inherited parent worktree で expected path 自体が worktree top-level でない
  - dirty orchestration worktree
- Orchestrator の `SpawnConfig.workspace_root` は orchestration worktree root になります。
- `TicketRoleLaunchContext` には original workspace root / target workspace root を渡し、prompt 上でも original / implementation / target roots が見える形を維持します。
- Panel diagnostic に created/reused worktree path/branch または failure reason を出すようにしました。
- tests を追加・更新しました。
  - stable layout naming
  - root population
  - invalid existing path no-cleanup
  - create/reuse
  - dirty reuse refusal
  - wrong branch refusal
  - unrelated repo refusal
  - inherited parent worktree refusal
  - existing client prompt/spawn root behavior

Merge:
- Branch: `panel-orchestration-worktree`
- Implementation commit: `00e11b3d feat: launch orchestrator from worktree`
- Merge commit: `735b0c04 merge: panel orchestration worktree`

確認:
- Branch-local reviewer `reviewer-panel-orchestration-worktree` が2回 request_changes 後、修正済み branch を approve。
- `cargo fmt --check` passed。
- `cargo test -p tui orchestration --lib` passed。
- `cargo test -p tui existing_ --lib` passed。
- `cargo test -p tui inherited_parent_worktree_directory_is_rejected_without_cleanup --lib` passed。
- `cargo test -p client ticket_role --lib` passed。
- `git diff --check` passed。
- `target/debug/yoi ticket doctor` passed。
- typed `TicketDoctor` は 0 errors / 3 pre-existing diagnostics。
- `nix build .#yoi` passed。

残作業:
- なし。今後の改善として、Panel 表示上の orchestration worktree status をより詳細に常時表示することは follow-up として扱えます。

---
