{"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-hkab5z1r","versions":[{"created_at":"2026-07-08T06:05:46Z","element_count":91,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"7e23e1ac258344471a780e15abcb8f205320873b5835bb8334c98ef506f32ce4","version":3},{"created_at":"2026-07-08T05:56:55Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e3fe4ac9f4161025d07023c8d68bf36882c897d10c0ea6e34d9a4fb7be05f108","version":2},{"created_at":"2026-07-08T05:56:54Z","element_count":105,"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}]}