{"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-sl56mn55","versions":[{"created_at":"2026-06-04T05:51:40Z","element_count":99,"note":"GA diverse re-design 2026-06-04: 総合 97.9→99.4 (中庭ロの字・吹抜 縁側 ピアノ室 PV 雨水 天窓 / 適応度 99.4 (美 99 環 100 楽 100))","saved_by":"editor","sha256":"e685a1cf3d1fba215884ba9b9814a13f316948a86027d7e7b0a0a9a2859c0a45","version":10},{"created_at":"2026-06-04T04:54:23Z","element_count":102,"note":"GA batch-improve 2026-06-04: 総合 66.5→97.9 (中庭ロの字・吹抜 縁側 ピアノ室 PV 雨水 天窓 南面サンルーム / 適応度 97.9 (美 95 環 100 楽 100))","saved_by":"editor","sha256":"ba4b7a452caa7bfb86606248cd7f84992dc173e78adeedfeda55fe836386c0b4","version":9},{"created_at":"2026-06-04T04:54:22Z","element_count":45,"note":"snapshot: batch-improve 2026-06-04 改善前の旧設計 (復元用)","saved_by":"editor","sha256":"0994014da72971578f48534bf14099da4291270b18918e5ecaaed92dcef4033a","version":8}]}