{"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-hus14s76","versions":[{"created_at":"2026-06-10T23:00:10Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72844800→quote24212747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d15f79722d7551e2f6d23510b24eac4671aefc6f05b5642ff7678fed5bbaaf80","version":9},{"created_at":"2026-06-10T21:11:34Z","element_count":72,"note":"5軸GA polish 54->95 by M5 (autonomous)","saved_by":"mcp","sha256":"060bcb004ed5e2940936922463152b6283921fea88bae944dacf6f03eaf6c5e6","version":3}]}