{"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-holmesdalehouse-evtuvexx","versions":[{"created_at":"2026-07-24T07:39:07Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"60eae301577e2294b8876ccd90bb24a99aceedc7b13185005822eb4fd8d15214","version":2},{"created_at":"2026-07-24T07:39:03Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}