{"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-ebr6la9n","versions":[{"created_at":"2026-06-10T13:25:46Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"1b0333955f88091efd237e7767e9ddfd17ffd1c33d7aa85eb61fe5fd3b51ac47","version":10},{"created_at":"2026-06-10T11:26:47Z","element_count":91,"note":"5軸GA polish 49->98 by M5 (autonomous)","saved_by":"mcp","sha256":"48187134271a30cd93d1ccd464c73994f1e13400e501d3fcb029db6c61ad852d","version":4}]}