Architecture
How rendering works
Renderer architecture displayed on the scheme:

File structure
- /src
- /components - concrete components like Frame, Rectangle etc. that exported as a part of package API
 - /helpers - utility functions
 - /hooks - React hooks for components
 - /mixins - common functions for renderers that set some attributes to Figma nodes.
Part of it is related to mixin interface inside Figma API.
As an example 
baseNodeMixinrelated toBaseNodeMixin. - /renderers - functions that can create/update specific Figma nodes
 - /styleTransformers - functions for transforming set of component style
 - index - root of package export
 - renderer - core of renderer based on react-reconciler.
 - types - common props of components