app/routes/auth.github.tsx

import { redirect } from "@remix-run/node";
import type { LoaderFunctionArgs } from "@remix-run/node";
import { githubApp } from "~/lib/github-app.server";

export async function loader({ request }: LoaderFunctionArgs) {
  const url = new URL(request.url);
  const state = url.searchParams.get("state") || crypto.randomUUID();
  
  // Generate OAuth URL for user identity authorization
  const oauthUrl = githubApp.getOAuthUrl(state);
  
  return redirect(oauthUrl);
}