Field definition for skipping last repeat on workout

When creating workouts with repeats in either the Garmin Connect app or on the web page, there's an option for top level repeats to check "skip last recover".

This is an option that I can't find anywhere in the FIT SDK documentation.

By exporting a FIT file from my Garmin device with this enabled for a repeat and then decoding the file with a FIT decoding tool I can see that the FIT file has field definition 18 set as a U8 to 1.

Is this the correct way to write a repeat step and skipping the last repeat? Should this be documented and/or added to `Profile.xls` from the SDK?

Probably related to this thread but this is less generic and seeks confirmation of approach.