Koa Stylus Middleware

koa-stylus provides middleware to integrate the Stylus CSS preprocessor with Koa.js web applications. This package is extremely old and was last published over a decade ago (version 0.1.1, 11 years ago). It is designed exclusively for Koa v1.x, which utilized generator functions for middleware. Modern Koa versions (v2.x and v3.x, which use `async/await`) are incompatible with this middleware without significant modifications or a compatibility layer. The package is effectively abandoned, has no ongoing development or release cadence, and lacks support for contemporary Node.js or Koa features. Its primary differentiator was its simple integration with the then-current Koa API for Stylus compilation on the fly.