{"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-7w9dii37","versions":[{"created_at":"2026-06-13T20:00:23Z","element_count":90,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"9445150ab9ded87aabbf3bb88699d6c34b335dadbdf3a20ed20572ac73702201","version":3},{"created_at":"2026-06-13T19:52:05Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ae8bb01226ff386d68c25a8ff59c4dcdef81c8b147b94a44101292a3268486ef","version":2},{"created_at":"2026-06-13T19:52:05Z","element_count":85,"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}]}