{"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-u9khx10t","versions":[{"created_at":"2026-06-26T19:32:09Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"1ec329594860d2605fdaf5959a848217979dfc54a657f45bca2aaeccb646ab66","version":3},{"created_at":"2026-06-26T19:28:54Z","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":"561287f5dd590c3ee0d8667662c6e77cd215715f7a8c384327d8ec23ea06ece6","version":2},{"created_at":"2026-06-26T19:28:54Z","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}]}