{"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-l6bavt1f","versions":[{"created_at":"2026-07-06T19:43:36Z","element_count":89,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"57b5b9d0b48abe75b906a5ce5665deaa3e7323bb02dbde1caee996a5ca0ea464","version":3},{"created_at":"2026-07-06T19:32:30Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f031d8f160b680c059ce1c22c6efa2e8198189157b954dceb6b9c7869875cab8","version":2},{"created_at":"2026-07-06T19:32:29Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}