diff --git a/.yoi/tickets/00001KV4ZDMV1/item.md b/.yoi/tickets/00001KV4ZDMV1/item.md
index 2c8b91b7..a271a006 100644
--- a/.yoi/tickets/00001KV4ZDMV1/item.md
+++ b/.yoi/tickets/00001KV4ZDMV1/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Panel composer で Alt+Enter 改行を SessionView と揃える'
-state: 'inprogress'
+state: 'done'
 created_at: '2026-06-15T06:27:36Z'
-updated_at: '2026-06-15T06:50:25Z'
+updated_at: '2026-06-15T06:51:06Z'
 assignee: null
 readiness: 'implementation_ready'
 risk_flags: ['tui-input', 'ux-consistency']
diff --git a/.yoi/tickets/00001KV4ZDMV1/thread.md b/.yoi/tickets/00001KV4ZDMV1/thread.md
index b6fff1b6..3244fb3a 100644
--- a/.yoi/tickets/00001KV4ZDMV1/thread.md
+++ b/.yoi/tickets/00001KV4ZDMV1/thread.md
@@ -162,3 +162,49 @@ Conclusion:
 - Approved. No blocker remains.
 
 ---
+
+<!-- event: implementation_report author: yoi-orchestrator at: 2026-06-15T06:51:06Z -->
+
+## Implementation report
+
+Integration report:
+
+Merged implementation branch into orchestration branch:
+- branch: `impl/00001KV4ZDMV1-panel-alt-enter-newline`
+- implementation commit: `5c339177 fix: align panel alt-enter composer handling`
+- merge commit: `0335cad9 merge: panel alt-enter newline`
+
+Reviewer result:
+- `approve` recorded from `yoi-reviewer-00001KV4ZDMV1`.
+
+Validation in Orchestrator worktree `/home/hare/Projects/yoi/.worktree/orchestration`:
+- Passed: `cargo test -p tui composer_keys`
+  - 4 passed
+- Passed: `cargo test -p tui multi_alt_enter --lib`
+  - 3 passed
+- Passed: `cargo test -p tui multi_empty_enter_uses_open_action --lib`
+  - 1 passed
+- Passed: `cargo test -p tui multi_non_empty_enter_reports_companion_unavailable --lib`
+  - 1 passed
+- Passed: `cargo test -p tui multi_ticket_intake_enter_builds_launch_request_not_direct_send --lib`
+  - 1 passed
+- Passed: `cargo fmt --check`
+- Passed: `git diff --check`
+
+Notes:
+- Broader `cargo test -p tui multi_pod --lib` was not used as a blocker because the known failure is an unrelated orchestration-root test outside the Alt+Enter change path.
+- Orchestrator worktree is clean after validation.
+
+Cleanup planned:
+- Stop related coder/reviewer Pods.
+- Remove only child implementation worktree/branch for this Ticket.
+
+---
+
+<!-- event: state_changed author: yoi-orchestrator at: 2026-06-15T06:51:06Z from: inprogress to: done reason: merged_validated field: state -->
+
+## State changed
+
+Reviewer approved, implementation branch merged into the orchestration branch, and focused validation passed in the Orchestrator worktree. Marking Ticket done in the orchestration branch.
+
+---