{"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-9sc7ttgn","versions":[{"created_at":"2026-06-10T22:53:58Z","element_count":77,"note":"legacy fix: jpy102533759→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0731a0a58d192cb2ed7b5d3dc11205b553d14cf6d534030e48a31bce0a34ae8a","version":10},{"created_at":"2026-06-10T17:23:17Z","element_count":72,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"1a1fa2ff61a493060336f9b7070a2fb76fde3415275640906270986d36105fac","version":2}]}