{"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-hilltophavenhouse-2f77wn2i","versions":[{"created_at":"2026-07-02T11:36:00Z","element_count":89,"note":"5軸GA polish 44->94 by M5 (autonomous)","saved_by":"mcp","sha256":"8de4ab82dc76ee4eddd075c9dfec612b6d7b4ac1458da550d0d0dcb37adbb44e","version":3},{"created_at":"2026-07-02T11:26:36Z","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":"151b016a491857d6793cebd0d507c9051f256d6a36a66da27fd54a9747bdbcdd","version":2},{"created_at":"2026-07-02T11:26:35Z","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}]}