{"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-45yj17e6","versions":[{"created_at":"2026-06-10T23:00:08Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20904388 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"68610d4cb70d77f495ff3514f07e0df02e1df3c966089f24dce12cee73cbe0b9","version":9},{"created_at":"2026-06-10T21:11:26Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5d5102f0de1d622cc79560c8a2936f46984621b08820ac3e4a5952cb8eeeb88d","version":3}]}