{"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-bcohj5en","versions":[{"created_at":"2026-06-10T23:00:59Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20998412 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7c703d2b7ba78dfcaddb2c726063dfccbc4cdf642022ffeda452369ca55ae1b7","version":9},{"created_at":"2026-06-10T22:00:51Z","element_count":72,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"27ab66d58f9385ad29db5933e7e8d1ed0941003509f7c098b1a846e9fe741845","version":3}]}