Making this thread somewhat pre-emptively, as I set things up.
Blockbuster
Blockbuster is a series of API mods that offer features from the Balatro Goes Kino mod as stand-alone packages. They're set up to support other mods' use of these features without needing to also interact with Balatro Goes Kino's themes and playable content.
Blockbuster: Counters
https://github.com/icyethics/Blockbuster-Counters
Counters are a new card layer with their own calculate function and interactions, build around the concept of scaling benefits or detriments. They can be stacked onto both jokers and playing cards, and are build around having a changing value to interact with. The counters in the base mod all decrease by 1 when they're triggered, but the system is set up to let devs design counters that increase their count, or have a static count that only changes through other effects.
Blockbuster: Spellcasting
https://github.com/icyethics/Blockbuster-Spellcasting
Spells are a new mechanic that jokers, enhancements, seals and decks can access, using the cards in your hand as a recipe to build a spell!
Blockbuster: Value Manipulation
https://github.com/icyethics/Blockbuster-ValueManipulation
A system to allow for more customizable design around value manipulation mechanics, as well as a quick way to be compatible without losing precision.