{"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-llji878t","versions":[{"created_at":"2026-07-13T10:09:58Z","element_count":89,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"522f3f1804e61ba60f25a9471276cc87616d6df85a38d75b816850aead9713c6","version":3},{"created_at":"2026-07-13T10:03:11Z","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":"e28db351021a941ed392cad9c0f5a6d193667c66f9b25ee4ed2701b328eb501f","version":2},{"created_at":"2026-07-13T10:03:11Z","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}]}