[追加] v1.0-dtp-beta リリース + Codex CLI 設定

- GitHub Release: v1.0-dtp-beta (prerelease)
- バイナリ: ~/bin/miyabi-gate にインストール
- .codex/instructions.md に miyabi gate CLI の使い方を追記
- Codex / Claude Code どちらからも使用可能

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.codex/instructions.md

@@ -18,3 +18,32 @@ cargo test && cargo clippy --all-targets --all-features -- -D warnings
 - GATE バイパス
 - テスト RED のまま完了宣言
 - git push --force
+
+## miyabi gate CLI
+
+バイナリ: `target/release/miyabi` または `~/bin/miyabi-gate`
+
+```bash
+# タスク登録
+miyabi gate register --issue 45 --title "タスク名"
+
+# 状態確認
+miyabi gate --format json status
+
+# ロック獲得
+miyabi gate assign task-001 --agent codex --node macbook --files "src/auth.rs"
+
+# ブランチ記録
+miyabi gate branch task-001 feature/issue-45-auth
+
+# PR 記録
+miyabi gate pr task-001 78
+
+# merge 完了
+miyabi gate merge task-001 a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2
+
+# ロック一覧
+miyabi gate locks
+
+# exit code: 0=成功, 1=GATE拒否, 2=入力エラー
+```

skills/self-improving-skills/skill-runs.jsonl

@@ -1,3 +1,4 @@
 {"ts":"2026-04-09T16:35:38.725Z","agent":"codex","skill":"context-and-impact","task":"DTP Phase A: miyabi-core に gate/lock/store/protocol を追加し cargo test とコミットまで完了","result":"success","score":0.95,"notes":""}
 {"ts":"2026-04-09T21:17:09.658Z","agent":"codex","skill":"context-and-impact","task":"DTP Phase B: miyabi gate CLI サブコマンド追加、protocol API 拡張、cargo test とコミット完了","result":"success","score":0.96,"notes":""}
 {"ts":"2026-04-09T21:27:55.420Z","agent":"codex","skill":"context-and-impact","task":"miyabi-core の clippy 7件を解消し clippy/test を通過確認。ただし HEAD 差分ゼロのため指定コミットは未作成","result":"partial","score":0.78,"notes":""}
+{"ts":"2026-04-09T21:28:53.022Z","agent":"codex","skill":"context-and-impact","task":"clippy 7件解消の確認後、空コミットで指定メッセージを作成","result":"success","score":0.92,"notes":""}