{"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-7y9fktqz","versions":[{"created_at":"2026-06-10T22:55:55Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0efc969cc9e70561dd15bfc41db4a963ee0b7cb100c38ef9db44c68017bc914e","version":10},{"created_at":"2026-06-10T18:29:57Z","element_count":90,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2db551bdcc42d9200a451417a08115d18909ebd1f3ee3dd9e1d2030016b44c6d","version":3}]}