{"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-q59ppy6e","versions":[{"created_at":"2026-07-18T03:18:12Z","element_count":82,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"2d27fbeb7c1d2a566e650bd5a0063f8bfcc154cd48322f2a1deac6c604b4b344","version":3},{"created_at":"2026-07-18T03:15:04Z","element_count":85,"note":"loop3: 設計時延床 60.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f51063e978d21cd4a035eeba57a9fdf8269537a872c6632b5d64941fb3454e50","version":2},{"created_at":"2026-07-18T03:15:04Z","element_count":85,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}