{"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-mmprt9qj","versions":[{"created_at":"2026-06-10T23:01:21Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81784771→quote22615183 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0fcb99292478644c9c5e53bef103a3b4d77f79b2942795604f127a856cf3a94c","version":9},{"created_at":"2026-06-10T22:17:55Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6569aad3fee1346348b3f4132632704a071839f6f512b46744a21a8116bfb68e","version":4}]}