{"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-n05gnamh","versions":[{"created_at":"2026-07-31T19:25:55Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3e8ac37aec18ce3ce95bbea72b6e22481558cc15ae7851233c9c268fa07ae515","version":2},{"created_at":"2026-07-31T19:25:55Z","element_count":119,"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}]}