{"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-riverviewbungalow-blloc49k","versions":[{"created_at":"2026-06-13T18:34:45Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2cebdd09d8ae4623d557b8be3b87a7a4880e0e250c8854e49062eea063fbde94","version":3},{"created_at":"2026-06-13T18:25:37Z","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":"721efd76c3c14e81872a7a38aee5bb6a426530d20c326cec07486c2016ef3c60","version":2},{"created_at":"2026-06-13T18:25:35Z","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}]}