ToS Question on Discord Bots, etc.

[Legion88]

I've been in BA groups where they had someone doing callouts using a combat tracker and it did legitimately feel like cheating as they were able to identify mechanics like Proto Ozma's shapeshifting before it even visibly started transforming (I believe the reason is because those moves have an invisible cast bar which the tracker is able to detect).

This is not the work of a combat tracker.
They just use a timeline.
Even Ozma has a preset order in which it uses its skills, the only randomisation can be, to which form it changes, so you need a branching on that point in the timeline if the different forms have different durations, and which person will be hit by which mechanic.
With this in mind you can easiely make a flowchart of the fight and callout mechanics even before their specific tells occur.
COmbat trackers can even do the callouts based on a timeline and verify through specific individual mechanics they scan for on what branch they are, but that can every person with a pen and a piec of paper.