What is a coremod, and what are it advantages and disadvantages?

[Mango106]

I've read around about coremods on the forums. I'm not quite sure how to feel about them, i've barely started to learn java. Some claim that they can do things that you wouldn't ordinarily be able to do if you didn't coremod, while other say coremods can things up. How do you guys feel about coremods?

Edited January 31, 2018 by Mango106

[Mango106]

i see, so only those with lots of modding experience under their belt should make coremods.

[LexManos]

And even then, only if the changes in the coremod can not be properly exposed in a non-mod-specific way and PRed to Forge.

99.99% of mods don't need a coremod.

99% of coremods SHOULD be at least attempted to be put into Forge. But most people fail the basic concept of having to explain themselves.

1% Of Coremods are actually doing something useful that is wholey specific for their mods and thus wouldn't fit in the Forge ecosystem. Those mods usually are total conversion or don';t play well in modpacks.