{"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-y0962qsn","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote23180049 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9fde96c2c4f524ab302f0b1407990ee48a679f9a2d5c8c85d01d6e500df04866","version":12},{"created_at":"2026-06-10T15:36:27Z","element_count":73,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"9ee0cacb5b2e87b7fa943c3c5fac0c015e494e1ae586a77d75e544b1980b14a2","version":4}]}