wtf is limiter?

This project was a rate-limiting middleware for the Fiber web framework, written in Go. Its job was to put a ceiling on how many requests a single user or IP address could make to your web application within a given time window. For anyone running a public-facing app, that's a practical safeguard against spam, abuse, and accidental overload. The project is now deprecated, which means the maintainers no longer update it and recommend using the version built directly into Fiber v2. At a high level, a rate limiter sits between the outside world and your application logic. When a request comes in, the middleware checks who is asking and how many times they've asked recently. If they're within the allowed limit, the request passes through. If they've hit the cap, the middleware turns them away, often with a "too many requests" response. This keeps your underlying service from being overwhelmed by one aggressive client or bot. The original standalone package would have appealed to Go developers already building on the Fiber framework who wanted to add a layer of protection without writing the logic from scratch. For example, if you run a search endpoint or a login page, you might use a limiter to stop someone from firing thousands of attempts per second. The README itself is just a deprecation notice and doesn't go into further detail about the historical configuration options or internals. What's notable here is the lifecycle. The project has been folded into the main Fiber framework as a built-in middleware. That consolidation means developers now get this functionality out of the box rather than pulling a separate package. For anyone who still depends on the old repository, the practical takeaway is to migrate to Fiber v2 and adopt the bundled limiter there.