{"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-willowbrookhouse-gtk7lnkf","versions":[{"created_at":"2026-06-23T09:01:04Z","element_count":82,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"a04eb67ebb8788213633db133f183c438dcb8ef78203ce7715fb53b84341c32e","version":3},{"created_at":"2026-06-23T08:49:34Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"795a3d9b37f91b8279c09b7f6cb84d1d38ebc40ef47b09f733d3ac35c3504d60","version":2},{"created_at":"2026-06-23T08:49:33Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}