{"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-whitecitylodgehouse-yhf9xl3q","versions":[{"created_at":"2026-07-20T10:17:11Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"6e56e8ba4dd6505344c94fcb3428b3c302be5faa444ff19cc6da3a9bdd9f6454","version":3},{"created_at":"2026-07-20T10:11:38Z","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":"77beabdb2f9b74ac1790ecd5bd1c26f36112e81c8b992101ecc7c836c098ddf4","version":2},{"created_at":"2026-07-20T10:11:38Z","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}]}