Subjective ZXT Extension Best Practices

This is a summary of various personal, subjective (= asie's) thoughts on how ZXT extensions should be designed. Eternal WIP

• Extension composition: I believe in composition of multiple extensions over big do-it-all extensions, as this allows implementations to be more truthful about what they support.
  • It's easier to communicate that you support five out of ten small extensions, rather than 50% of one big extension.
• Minimize patching: If an extension does multiple things which require patching multiple areas of ZZT's source code, it might be good to try and split the surface area across multiple extensions which do smaller things.