{"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-4ik4ucuy","versions":[{"created_at":"2026-06-10T22:53:17Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy54927201→quote21425095 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4f834978015a909ac7a34232ff17881d33e36dc1f8a805565d908003879d040d","version":10},{"created_at":"2026-06-10T16:22:46Z","element_count":91,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"7820b56a604806131c4622716509613ff99b8a3cd7b3d76d2845aa2f7893bf67","version":2}]}