{"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-qsnr8gcl","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21228016 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e3876c3807e88dbbb70f6a5f101ee791cd45330b38b7a981e6ccea607bf54ea1","version":12},{"created_at":"2026-06-10T15:53:07Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e18979c053089c25439b6bbff8bcc2c76a436e5123f6d6290f2e2b114183317f","version":4}]}