{"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-wychwoodgrovehouse-6azyfk95","versions":[{"created_at":"2026-06-10T13:19:28Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.3㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"fda8e0844e872ee07a1763d9bb656605fd2752f99a1b6786c582806b2ca1ef71","version":10},{"created_at":"2026-06-10T10:09:40Z","element_count":73,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"3cb5832b3f7252ebd4234ce46e7e4985c2eb4ee171f21affb3fc39b5a29994ea","version":2}]}