{"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-wrxgqvaz","versions":[{"created_at":"2026-06-10T22:53:45Z","element_count":85,"note":"legacy fix: jpy75041820→quote21093533 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a4b22fa2f310841b150b7c1f174af235ecb42b7989e51589e4b04ad998f3f8b7","version":10},{"created_at":"2026-06-10T17:08:48Z","element_count":90,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4b3f6be7c31d67ee45c26c22279f76e2230876d35018a2a67a15c9ddb74eb827","version":2}]}