SlimesAPI is the shared utility library that powers every Resurgence mod. It isn't a content mod on its own; install it whenever another Resurgence mod asks for it. You may also use it to develop your own mods if you wish.
Features (as of v2.1.0):
Per-player persistent data API; typed, codec-driven storage attached to every player.
Item name gradient API interface, with static (two-color) and animated (sliding, breathing, or rainbow) support.
Json5, comments and nesting support for configs.
Server operators can edit any registered config in-game; non-ops see a read-only view.
Tooltip rendering hook into item tooltip drawer, plus an event for injecting extra components and a comparator hook for ordering.
Register a built-in resource pack bundled in mod jars with one-line.
Color interpolation, look-vector math, mod-loaded checks, JSON pretty-printing.