{"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-565bm17v","versions":[{"created_at":"2026-07-13T10:09:57Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d64d5705b7f16ce8a951b343ed5c2c856d2824a4044cd2e4d0ad287f9050c226","version":3},{"created_at":"2026-07-13T09:59:46Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f95e42362d14c02681570dcbdc359b0ff7b55dc380afef54d8c160b8856c63e5","version":2},{"created_at":"2026-07-13T09:59:46Z","element_count":134,"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}]}