{"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-brooksidelodgehouse-c4fud2fd","versions":[{"created_at":"2026-07-01T10:50:16Z","element_count":52,"note":"5軸GA polish 38->87 by M5 (autonomous)","saved_by":"mcp","sha256":"aa88d13eebfab4151535ecd99a98efa497e5b8b14df5ca942ba58ee11f99f99b","version":3},{"created_at":"2026-07-01T10:46:26Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2dea1353a03d1a2fd7193d05d189ec8d9d9a00321accd5bc40ee8d4bece75fde","version":2},{"created_at":"2026-07-01T10:46:26Z","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}]}