{"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-0y2ksnao","versions":[{"created_at":"2026-07-17T14:13:52Z","element_count":72,"note":"5軸GA polish 42->92 by M5 (autonomous)","saved_by":"mcp","sha256":"cac403fb29da3d37e231d9b010a6820def096c5e76c9673fe01b4d57ccaab765","version":3},{"created_at":"2026-07-17T13:59:17Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6bf40b968d6ce514e63812a9c91bcfd911ed5be9d0aa023355efbb65826fb0fc","version":2},{"created_at":"2026-07-17T13:59:17Z","element_count":83,"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}]}