{"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-hollycrofthouse-k42igla2","versions":[{"created_at":"2026-07-22T14:27:23Z","element_count":101,"note":"loop3: 設計時延床 78.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0082baf7e5536c9e994ba74326fece48aad3994a47d193f839e17f01317a9bd4","version":2},{"created_at":"2026-07-22T14:27:23Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}