{"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-78fbmd1w","versions":[{"created_at":"2026-06-10T23:05:46Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy70239456→quote23345656 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"38682bf2cdae8e095d292705ebf7414731488e4b8ef6e66ab807fc346c68b29d","version":9},{"created_at":"2026-06-10T22:17:18Z","element_count":89,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cf9c71692b0303acb24245f8278c4ef2e0247419bd175079378cbd1e00cdeb69","version":4}]}