{"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-zvgl47a7","versions":[{"created_at":"2026-06-10T22:52:48Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy52954560→quote20863604 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c5b3891252c15f7d1e233fd496ee228cb2f7c78db358dd419a2adfa85212be7c","version":10},{"created_at":"2026-06-10T16:23:19Z","element_count":73,"note":"5軸GA polish 54->91 by M5 (autonomous)","saved_by":"mcp","sha256":"ce5f37fb558ca44a27e031c73851787204596b9fb986a8a4c5f9063e245a2916","version":2}]}