{"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-ow7cc751","versions":[{"created_at":"2026-06-10T22:59:46Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21491622 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a24bfce810e5eb775b3982b6de398f7aabc38225320d1877319dfe6b13e01c06","version":9},{"created_at":"2026-06-10T20:54:37Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e4d47d394de6128feee9cc672d8d105a7f53db9f88202ea8795eb84a8e9bf031","version":3}]}