{"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-willowbrookhouse-m1nz5ul9","versions":[{"created_at":"2026-07-13T19:41:39Z","element_count":83,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"5a2bddd9daa3eaa48f7aeb745aa2effa47d2c7f3f714fc7d7cf67393b928de3f","version":3},{"created_at":"2026-07-13T19:30:06Z","element_count":101,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"11aa4e40a8db6620ef1158f20fdd56079f4db7e3e42037be7555b5817b83d903","version":2},{"created_at":"2026-07-13T19:30:06Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}