{"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-ej1k53w9","versions":[{"created_at":"2026-06-10T22:59:41Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy41884668→quote19615588 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"cf5512e59c7c30e2f273b79c0288fa84cae3c9af99b8708da0b6ba98c956c62d","version":9},{"created_at":"2026-06-10T20:38:24Z","element_count":89,"note":"5軸GA polish 56->92 by M5 (autonomous)","saved_by":"mcp","sha256":"c13b46dac2d52ca29a8b017934481892a4504aa401e27792f74e2fa809920271","version":2}]}