{"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-uhd97wlf","versions":[{"created_at":"2026-07-07T06:14:38Z","element_count":71,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"849cc3101092d2b526c308f8f2fab170ba843d0de42f7b547aa214c49d9486af","version":3},{"created_at":"2026-07-07T06:06:46Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"096705cc5245664b1f7fd65262b160e7615270ca8d1ea727b8ad419591dfffc6","version":2},{"created_at":"2026-07-07T06:06:46Z","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}]}