Duolingo Github to Graphite Redirect

duolingo-github2graphite.js

// ==UserScript==
// @name         Github PR to Graphite Redirect
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Redirect GitHub PR pages to Graphite equivalents
// @match        https://github.com/duolingo/*/pull/*
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    const githubUrl = window.location.href;

    // Match pattern: https://github.com/{owner}/{repo}/pull/{number}
    const match = githubUrl.match(/^https:\/\/github\.com\/([^/]+)\/([^/]+)\/pull\/(\d+)/);

    if (match) {
        const [, owner, repo, prNumber] = match;
        if (owner != "duolingo") {
            return;
        }
        const graphiteUrl = `https://app.graphite.dev/github/pr/${owner}/${repo}/${prNumber}`;
        window.location.replace(graphiteUrl);
    }
})();