{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-m8z432km","versions":[{"created_at":"2026-06-04T05:55:54Z","element_count":70,"note":"GA diverse re-design 2026-06-04: 総合 92.1→93.2 (中庭ロの字・吹抜 縁側 ピアノ室 PV 雨水 天窓 / 適応度 93.2 (美 100 環 100 楽 100))","saved_by":"editor","sha256":"e0ddde02f2af1aa4014b8bc1b82b2069c471d69b26fa376503d1e6500d791663","version":4},{"created_at":"2026-06-04T04:58:44Z","element_count":69,"note":"GA batch-improve 2026-06-04: 総合 40.3→92.1 (中庭ロの字・吹抜 ピアノ室 PV 雨水 天窓 / 適応度 92.1 (美 100 環 98 楽 100))","saved_by":"editor","sha256":"86225617c72ef860a23afed749c39f692d4fe6dd40841b4efef6d6c3e0f77f34","version":3},{"created_at":"2026-06-04T04:58:44Z","element_count":29,"note":"snapshot: batch-improve 2026-06-04 改善前の旧設計 (復元用)","saved_by":"editor","sha256":"0cef16c501124d5e94175a7454f0c8090cb8446189ced69b19978f63eb7953c2","version":2}]}