{"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-hu9ur35d","versions":[{"created_at":"2026-06-10T22:56:43Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20693313 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6fa1da5373d540190a7eac16232b643bc0268c37026518e7374f390a3baf4542","version":10},{"created_at":"2026-06-10T19:02:38Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b9228c215609066997f831d4b9e364f4602daa32b8b7972873f52bad4d851caa","version":3}]}