{"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-cambridgehouse-7o7xr2wk","versions":[{"created_at":"2026-06-28T17:52:10Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"68deb234168786407b038e78d029b3b5d3712f4bccf1263107209def05b79331","version":3},{"created_at":"2026-06-28T17:40:43Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0a8cf344d036bbfb96b872b9d1ae460af41980a66e214f50a5eb7568f4c7fcfe","version":2},{"created_at":"2026-06-28T17:40:43Z","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}]}