Add Middleware and Hooks - Redop

This tutorial shows how to add shared behavior around your tools.

What you will add

one global middleware
one before hook
one after hook

Step 1: Add middleware

import { middleware, Redop } from "@redopjs/redop";

const timing = middleware(async ({ ctx, next }) => {
  (ctx as Record<string, unknown>).startedAt = performance.now();
  return next();
});

Step 2: Add hooks

new Redop({ serverInfo: { name: "middleware-demo" } })
  .use(timing)
  .onBeforeHandle(({ tool }) => {
    console.log("starting", tool);
  })
  .onAfterHandle(({ tool, ctx }) => {
    const ms = performance.now() - ((ctx as Record<string, unknown>).startedAt as number);
    console.log("finished", tool, ms);
  });

How to think about it

middleware changes or controls execution flow
before hooks observe work before the handler runs
after hooks observe successful results and may replace them

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