{"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-z9yomwiz","versions":[{"created_at":"2026-06-10T22:55:52Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6a819c4f1a518873580126c23939a5c4450f2c87d374e6daa3dd7dd340134087","version":10},{"created_at":"2026-06-10T18:29:58Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"10ae9ee9ae62589a966668d8bf68a96cc6b476da96ff2163e50dda14eb2004e2","version":3}]}