{"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-b04q03p5","versions":[{"created_at":"2026-06-10T23:58:01Z","element_count":83,"note":"5軸GA polish 50->98 by M5 (autonomous)","saved_by":"mcp","sha256":"308df88c6a89a70c7c84e6a7929e512fbc259d522d047a396c133c1a71b094f4","version":13},{"created_at":"2026-06-10T23:09:23Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"27a8869173d36ea4f9fd6735250cdff755ef45072cde39aeccc000b4c2891146","version":7}]}