{"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-jzo35dsf","versions":[{"created_at":"2026-07-20T19:27:20Z","element_count":71,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"c0cf4c0b1734266c22774abfaf6ff23bb9e8f15d58699e721bde1bc9b0758558","version":3},{"created_at":"2026-07-20T19:22:13Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8aa1fd2ac0600f427f10a19d7a97903df2f834f80e6f3ac7fc632b3da3374d64","version":2},{"created_at":"2026-07-20T19:22:13Z","element_count":87,"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}]}