{"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-svj8wspo","versions":[{"created_at":"2026-07-13T09:54:02Z","element_count":84,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"70d2ec56ee58ef4b41a06e0369e4125e1617103aa5e275aaed00cd89a9cc1062","version":3},{"created_at":"2026-07-13T09:47:25Z","element_count":119,"note":"loop3: 設計時延床 80.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c5dfdf7dfe0b8f6fd1cecb5eddc6316f216a0bcb5675c7d84107e8b11c6b00f6","version":2},{"created_at":"2026-07-13T09:47:25Z","element_count":119,"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}]}