{"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-wl7jdic9","versions":[{"created_at":"2026-07-03T06:27:36Z","element_count":84,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"4a4080a75113591c93331c50b90f95c1668b60e8926c8ebdcdb93fce3020fc05","version":3},{"created_at":"2026-07-03T06:18:30Z","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":"d3b9ae7ff650ffe124c5bf7db21f730aa592b48e69de87bdd465a1dc7f0f44eb","version":2},{"created_at":"2026-07-03T06:18:30Z","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}]}