{"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-ii4jmvdm","versions":[{"created_at":"2026-07-03T19:41:49Z","element_count":83,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"edb343d9892870ff868be2732c3de1447ead1169a2d1a3da3845d4666059b08d","version":3},{"created_at":"2026-07-03T19:32:54Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"294ee96b586a177f96cd841c69d45020854a8ce3c8dbc3512bfde499d1a4e38d","version":2},{"created_at":"2026-07-03T19:32:54Z","element_count":101,"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}]}