{"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-367zlb48","versions":[{"created_at":"2026-06-13T21:01:41Z","element_count":68,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"db25c64e52a20a7f9eb78a336d2a271f08edea0a1c981f71326ae2f4d4f6568f","version":3},{"created_at":"2026-06-13T20:47:37Z","element_count":82,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7417bcddb8492b196c2b64a2be8951921863fe29a29c7c80c9215845184defe0","version":2},{"created_at":"2026-06-13T20:47:36Z","element_count":82,"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}]}