Our goal is to keep breaking changes between any given version of X Rebirth to an absolute minimum. In some cases, however, we have had to change things which break scripts/mods which were written for older versions. The same will be true for UI modding.
The following section contains all breaking changes on the UI modding side which are provided on the interface level. This should help you to make any necessary changes to restore compatibility of older mods with new versions of X Rebirth.
The list of breaking changes does NOT cover changes in the provided/shipped Lua scripts (for instance the ones located under ui/addons/XXX or ui/core/Lua. These scripts can change anytime without explicit notice. If you hook into one of these scripts or provide replacements for these, please check the script for possible breaking changes yourself.
Please note that during the beta/RC phase of 3.50, the UI modding design is still in a state of flux and we are more likely to introduce breaking changes while we stabilise the modding interface.