{"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-n6l159sv","versions":[{"created_at":"2026-06-10T23:00:31Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote22161645 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c865077d4f9de65b4736c5b28258ec9c71ae33a0095005b0e81565d55ed12cf9","version":9},{"created_at":"2026-06-10T21:28:32Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"21fe32a8c77632ec4542b36e193dbb608bad1f6b3ee0e5d51bc16e3ebcac4bdc","version":3}]}