{"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-mxpbt1cy","versions":[{"created_at":"2026-07-17T14:13:53Z","element_count":73,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"eca72a53b3ffcd1beba457ffaf81e93a61ec74382960b79a148888d278046595","version":3},{"created_at":"2026-07-17T14:01:45Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e91db39f2ebbfa712fdf2836b0205f2dc3c28a94c28ea4d015e87c2e0bc50d9f","version":2},{"created_at":"2026-07-17T14:01:45Z","element_count":126,"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}]}