{"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-axqicrmh","versions":[{"created_at":"2026-07-04T19:34:15Z","element_count":90,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"72adf628a7cf7c109399f76f3babe9622ee7fcaeac5337306864cbf31254b114","version":3},{"created_at":"2026-07-04T19:20:00Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"deebf71316c21b04fb3bbaf88238fff865169a8430281556af068627b57c663e","version":2},{"created_at":"2026-07-04T19:20:00Z","element_count":105,"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}]}