{"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-house-wsh4d5dx","versions":[{"created_at":"2026-06-10T22:58:16Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63545472→quote21306726 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6339c3073d161990444a9d694233ab4cc479ada96d0b57469342308ec3efedda","version":9},{"created_at":"2026-06-10T19:51:04Z","element_count":71,"note":"5軸GA polish 58->90 by M5 (autonomous)","saved_by":"mcp","sha256":"4e9820023ea02e50e3fda0f73f580ffad4d2d47bac91cb0630d83b6b6852e064","version":2}]}