{"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-cvakhyy5","versions":[{"created_at":"2026-06-19T15:25:06Z","element_count":83,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"2bd3fe6d414ec20864856f26ded496a8f6655e8058d180809ec29977c65a3860","version":3},{"created_at":"2026-06-19T15:14:34Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c57414e17e8454635f0fc9a5f90bca593db1536293c67ff3bee1c69eb4054cf0","version":2},{"created_at":"2026-06-19T15:14:32Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}