_middleware.ts

// app/routes/_middleware.ts

import { createRoute } from 'honox/factory'

export default createRoute(async (c, next) => {
  console.log('middleware at app/routes/_middleware.ts')
  await next()
})

server.ts

// app/server.ts
import { createApp } from 'honox/server'

const app = createApp({
  init: (app) => {
    // The following will be executed.
    app.use(async (c, next) => {
      console.log('middleware at app/server.ts')
      await next()
    })
  }
})

// The following is not executed because the middleware is overwritten by the HonoX funcs:
app.use(async (c, next) => {
  console.log('not executed')
  await next()
})

export default app