{"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-f0mzwut5","versions":[{"created_at":"2026-07-03T06:39:57Z","element_count":70,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"2a50c778f39dad025d670b8c46b77ff54fb583730d232b0da9682df335a295c4","version":3},{"created_at":"2026-07-03T06:33:55Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"809dd82de26815acc94d06e4a1532b611ddf4cdc6f452f412978527fb234307e","version":2},{"created_at":"2026-07-03T06:33:55Z","element_count":126,"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}]}