{"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-4e6q89ty","versions":[{"created_at":"2026-06-13T15:02:48Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f159a5336f6fffb1a7b59ceaf6ba9d6bd66c46af8d495177181515e79bcf2f9b","version":3},{"created_at":"2026-06-13T14:49:09Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c2d95b2ce267a8c7f0019c732ccbaa5efc73abbd3bc0cd10e4ab656bac2b1262","version":2},{"created_at":"2026-06-13T14:49:07Z","element_count":130,"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}]}