{"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-bwbmld38","versions":[{"created_at":"2026-07-22T19:31:04Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"eef9b85d312fc541f0bca515b7c6a5d4bc5bc34de7ab9f0e5d64bb459344a9a2","version":2},{"created_at":"2026-07-22T19:31:04Z","element_count":119,"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}]}