{"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-r02u8c1z","versions":[{"created_at":"2026-07-07T01:08:29Z","element_count":82,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"221d3dedde8b721edf0dbf5aa5a04934e90b8517530868803f226b4a14f61429","version":3},{"created_at":"2026-07-07T01:04:05Z","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":"6ad2406a0b8d605c1809bce8e9d1ec57821271b90c6888d3b8276de710d8e4b3","version":2},{"created_at":"2026-07-07T01:04:05Z","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}]}