I am very confused.

[uightpt]

I'm trying to get a handle on how the code is put together, so that I can write add-ons. However, I can't actually find much of the code relevant to gameplay. I look under talents and all I can find are a few spells, acid splash, and a talent called kick. I look for classes and I find a grand total of three classes, each with no more than one talent assigned to them. What in the world am I doing wrong? I feel like I have fallen for some kind of elaborate practical joke.

[HousePet]

You could give us a clue about what you are looking at and where you are looking.

[uightpt]

I am looking inside boot-te4-1.3.1.team, which I unzipped to find the /data and /mod folders. The talents I mentioned are in /data/talents.lua, and I wasn't able to find the classes just now. The /mod/class folder has nothing pertaining to in-game classes in it.

[HousePet]

That explains it.
Try looking in the tome-1.3.1.team.

[uightpt]

I don't see anything of that name. Where would I find that?

[Radon26]

in modules.