{"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-hayeswatersidebungal-fwu49r21","versions":[{"created_at":"2026-07-22T06:13:29Z","element_count":83,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d2a5a025b0189b1157cbb0c9bf249dd080e3a8816032875e6b91e8809975bcb3","version":2},{"created_at":"2026-07-22T06:13:28Z","element_count":83,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}