{"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-3m7015b4","versions":[{"created_at":"2026-06-04T05:52:56Z","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":"4025115d4f75a419a54fba8e0e1e36f13574bf25295fd8156579616b2c0d3b6f","version":10},{"created_at":"2026-06-04T04:53:24Z","element_count":70,"note":"GA batch-improve 2026-06-04: 総合 70.3→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":"3cf670f732d369d95a93a2fd673e0f5da819e605f91e7721761c15a60d8cdd8d","version":9},{"created_at":"2026-06-04T04:53:24Z","element_count":45,"note":"snapshot: batch-improve 2026-06-04 改善前の旧設計 (復元用)","saved_by":"editor","sha256":"520b19c99813a0f18f081490d2d67d13d866291e5190b4068a6ad67e2f3ceaa7","version":8}]}