{"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-1rx979u0","versions":[{"created_at":"2026-06-23T19:25:33Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"4b7092c16ccde488377bc56db34d972291206d6d52edb8d04db11ff860a81a9d","version":3},{"created_at":"2026-06-23T19:21:30Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"26889193b5e0d8958f67a6d0328eca9a1d8dff502d854d31d3321475a498f97e","version":2},{"created_at":"2026-06-23T19:21:30Z","element_count":105,"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}]}