{"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-597va7ja","versions":[{"created_at":"2026-06-04T05:53:14Z","element_count":70,"note":"GA diverse re-design 2026-06-04: 総合 94.6→94.6 (中庭ロの字・吹抜 縁側 ピアノ室 PV 雨水 天窓 / 適応度 94.6 (美 100 環 100 楽 100))","saved_by":"editor","sha256":"c8f649aa11326936fb49b2c9085ca0066659eadc865e44c00de3ad43855bc49a","version":10},{"created_at":"2026-06-04T04:54:46Z","element_count":70,"note":"GA batch-improve 2026-06-04: 総合 65.3→94.6 (中庭ロの字・吹抜 縁側 ピアノ室 PV 雨水 天窓 / 適応度 94.6 (美 100 環 100 楽 100))","saved_by":"editor","sha256":"2a1279bfebd9c4ed7cfd6374e6eef54913943810e1a69e8e315666e48cb0ab00","version":9},{"created_at":"2026-06-04T04:54:46Z","element_count":45,"note":"snapshot: batch-improve 2026-06-04 改善前の旧設計 (復元用)","saved_by":"editor","sha256":"7f0137289ef77cd0d187098d32e78b0261f0d0a07ce6c7cc48e08496d6429c0e","version":8}]}