{"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-1ft4sm6j","versions":[{"created_at":"2026-08-04T06:04:38Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3225f714b3dbf2a69b4b6d6c18316002755add18b2ec690733d49f3aac42783c","version":2},{"created_at":"2026-08-04T06:04:38Z","element_count":105,"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}]}