{"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-1p5i48co","versions":[{"created_at":"2026-06-10T23:01:19Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote24636447 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c6174936ac663300763617e17f618c98f76fe3bd7a05dea9cc0100b59237b1b6","version":9},{"created_at":"2026-06-10T22:34:42Z","element_count":72,"note":"5軸GA polish 59->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b25da3afc9aaf4706c9ea961b263d8a905c12190239a7167c2e3534369094e9a","version":6}]}