{"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-q0y2t8g6","versions":[{"created_at":"2026-07-26T06:06:30Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ddf644d1ea8326ab85a031fe8604b0770bab3d829240582336e27f52a6ab56c3","version":2},{"created_at":"2026-07-26T06:06:28Z","element_count":101,"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}]}