{"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-ajgnn1y6","versions":[{"created_at":"2026-06-13T14:35:24Z","element_count":84,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"664a05d5ba1356efeb156e7b09ef97b00d12a81d527040f574347d46319a137a","version":3},{"created_at":"2026-06-13T14:25:33Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5fb7c3779d91037a6fb27772dbb1ff5a94ecf3fce55f782ceccb37ba9092cb1d","version":2},{"created_at":"2026-06-13T14:25:33Z","element_count":105,"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}]}