{"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-jflkfgwo","versions":[{"created_at":"2026-07-14T09:34:18Z","element_count":71,"note":"5軸GA polish 40->92 by M5 (autonomous)","saved_by":"mcp","sha256":"03f56c43478485a61799ddcd7920c93b63abe3942bdd43292d4219a3fe5f3868","version":3},{"created_at":"2026-07-14T09:25:07Z","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":"a6fff34bb83df11eccf2207401b26178adaff462125acfa888095559ff395701","version":2},{"created_at":"2026-07-14T09:25:07Z","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}]}