{"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-willowbrookhouse-ek8b34e4","versions":[{"created_at":"2026-06-10T22:53:44Z","element_count":77,"note":"legacy fix: jpy85444799→quote20065976 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"fb54b3c3c13c4eb689e3daf64eea6d038c0e4ec4b2c208472177d88301963d76","version":10},{"created_at":"2026-06-10T17:08:47Z","element_count":72,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ffbcd76e3d65d20271eecb8d537641872ab5d66ee6f3f543c7efbf112635c952","version":2}]}