React monorepo (yarn workspaces, packages/*). Layered architecture: a renderer-agnostic Fiber reconciler driven by the core React API, fanned out to multiple host renderers (DOM, Native, ART, test), with a parallel Server Components / streaming stack (Flight + Fizz), plus DevTools, developer tooling, and shared internals.
Visualise your architecture, share with your team, and keep documentation alive.
