Project MMO is a mod where you can level up different skills (agility, combat, farming, cooking, smithing, etc.) and you get better and better perks as you level.

So specifically, it would be great if crockpots gave cooking XP. Also, the perk of the cooking skill is that you get an increased chance of extra outputs as you level. So it would be great if crockpots also supported that.

There is an API listed about 3/4 of the way down this page although I'm not sure how helpful it could be to you.

This would be awesome to have. As an addon to this it could be great if some dishes were tied to having a certain cooking level, so that you would need to "practice" cooking to get to the good meals

I'd like this too, as I use both Crockpot and PMMO in my pack.