{"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-b62f0g7q","versions":[{"created_at":"2026-06-13T21:24:44Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"44d7349074360233aefd8d5a18579aa53c6602682ba7440a81079782997da06e","version":3},{"created_at":"2026-06-13T21:15:37Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c158b23928c7817f155d424322eb038369ad2eb36e6029708e90360ba4ebf0cc","version":2},{"created_at":"2026-06-13T21:15:33Z","element_count":90,"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}]}