{"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-u1rvujtw","versions":[{"created_at":"2026-07-13T10:23:54Z","element_count":83,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d3c5a98f29a38939de74874ee5fc5e13e7d3cd21e8c5ce751feffccaea3e8aca","version":3},{"created_at":"2026-07-13T10:11:16Z","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":"86f0e2a883a15e0ba141cf3e5c6ed5a03c9d39624b99e609a2bfce9064859b21","version":2},{"created_at":"2026-07-13T10:11:15Z","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}]}