Plugins are a way to extend what Nuclear can do. Nuclear itself is intentionally pretty barebones - it's a framework on which plugin developers can build. Plugins are written in Typescript.
Plugin installation
When you install a plugin, Nuclear first reads its manifest (package.json) to learn about it, then creates a folder in your appdata, in plugins/<pluginName>/<pluginVersion>. The contents of the plugin are then copied into this folder, and the plugin is loaded from there.
Nuclear keeps a registry of installed plugins in plugins.json. It's used on startup to find the locations of installed plugins. They are then loaded in the order of installation dates.