{"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-theoldmillhouse-p7hvrbh1","versions":[{"created_at":"2026-06-13T18:06:25Z","element_count":74,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"8892e6b59e0261e4f935f203db462e0a9d1a55cae8a1a14de51728b6a9fc16f6","version":3},{"created_at":"2026-06-13T18:01:40Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3f3fc8e71ca7e8d00615a8a4d720df2692d65dbde294dc8aacf831309a04eaba","version":2},{"created_at":"2026-06-13T18:01:32Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}