I got bored and just started reading but fun tut

app/routes/contacts.$contactId_.destroy.tsx

@@ -0,0 +1,13 @@
+import type { ActionFunctionArgs } from "@remix-run/node";
+import { redirect } from "@remix-run/node";
+import invariant from "tiny-invariant";
+
+import { deleteContact } from "../data";
+
+export const action = async ({
+    params,
+}: ActionFunctionArgs) => {
+    invariant(params.contactId, "Missing contactId param");
+    await deleteContact(params.contactId);
+    return redirect("/");
+};