{"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-u0lg3onr","versions":[{"created_at":"2026-06-10T22:55:10Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21031370 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a923cc941923b9bdf33f43af67f72b6bea396f87af8300e7d52685e4d9567ce5","version":10},{"created_at":"2026-06-10T17:56:42Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"14b610871379661980621e903e0238bdff9deafbfcac2aaa5bf5996b10f9fb45","version":3}]}