{"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-j5h1ees3","versions":[{"created_at":"2026-06-10T23:01:05Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→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":"539028f526cd492c597875286a9b3c98b6c8577a88eb70372f867d5640cd4fd9","version":9},{"created_at":"2026-06-10T22:01:06Z","element_count":72,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ddf08633e7e8b611c582b5263d16804667c083e6afc73dea16f4683e66fadc75","version":3}]}