{"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-i10xgmc4","versions":[{"created_at":"2026-06-19T19:26:40Z","element_count":83,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"2bd3fe6d414ec20864856f26ded496a8f6655e8058d180809ec29977c65a3860","version":3},{"created_at":"2026-06-19T19:21:15Z","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":"ded633e0cbe3cab395e42141284e36dc1122c91a9e675a5e1011b769daf5e608","version":2},{"created_at":"2026-06-19T19:21:13Z","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}]}