{"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-theoldmillhouse-0eibmzgy","versions":[{"created_at":"2026-06-10T22:54:00Z","element_count":77,"note":"legacy fix: jpy87379776→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"940189288f48259711db5279a0822f84c5afa577cf77ac1fd8c06fd3a5cd8eeb","version":10},{"created_at":"2026-06-10T17:23:08Z","element_count":84,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e4ea963e280921fff973ce260edbd9b74ddd9b52bef725e1dc446471e35bf016","version":2}]}