Where can I start to learn modding?

[ZombieTheDerg]

My interest in TBOI was revived with Repetance, and I want to go into a programming field of work. I also enjoy modding video games and picking apart games themselves.

So I wanted to ask, where can one learn to start modding Repentance? All of the resources ive found are talking about Afterbirth+, so unless modding for Repetance is similar to modding for Afterbirth+, then i'd like to ask if I could find maybe a video or a steam guide on how to mod the game. Thanks in advance

[MrMcMonkey]

You could start here: https://wofsauge.github.io/IsaacDocs/rep/tutorials/ExampleProject.html

Also I would think of a simple mod idea, like spawning a troll bomb when picking up a dime. Then start looking in the API (link above) and for similar mods in the Steam workshop, download them and take a look at their code to get some ideas how some mechanics can be done. In this case: how to react to picking up something? how to check for a dime? how to spawn a troll bomb?

From there on you can expand and learn more things from the API, like checking collisions, room changes or other crazy things.