Llanfair Rewrite does not support the generic Splits.io Exchange Format, so it cannot output runs in the standard format.
However, Splits.io has limited support for reading Llanfair Rewrite's proprietary format. These files use the extension
Llanfair Rewrite doesn't support the Splits.io Exchange Format, so it can't read most runs from Splits.io.
You cannot request arbitrary runs from the API in Llanfair Rewrite format. Runs originally uploaded in Llanfair Rewrite format can be fetched in that same way using the header:
Runs returned in Llanfair Rewrite format include the header: