Stop-gap solution for https://github.com/orgs/community/discussions/48265 / https://github.com/orgs/community/discussions/48351.

github_profile_stackoverflow_icon.user.js

// ==UserScript==
// @name         Github Profile StackOverflow Icon
// @namespace    http://pjpscriv.com/
// @version      2025-03
// @description  Prettify StackOverflow links on Github Profiles, as is done for other social media platforms.
// @author       @pjpscriv
// @match        https://github.com/*
// @match        https://gist.github.com/*
// @exclude      https://github.com/*/.*
// @icon         https://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/GitHub_Invertocat_Logo.svg/240px-GitHub_Invertocat_Logo.svg.png
// @grant        none
// ==/UserScript==

const logging = true;
const logName = '[GH Profile SO Link]';

(function() {
  'use strict';

  const stackDomain = "://stackoverflow.com";
  const elSelector = "[itemprop=social], [itemprop=url]";
  const linkSelector = ".Link--primary";
  const svgSelector = "svg";

  const iconPaths = `
    <path d="M12.6199 14.5722V10.2894H14.0458V16H1.22034V10.2894H2.64624V14.5722H12.6199Z" fill="currentColor"/>
    <path d="M4.21543 9.89546L11.1928 11.3635L11.4861 9.96645L4.50871 8.49838L4.21543 9.89546ZM5.13854 6.55087L11.6017 9.56424L12.2038 8.2702L5.74058 5.25682L5.13854 6.55087ZM6.92715 3.37649L12.4058 7.94428L13.3183 6.84733L7.8397 2.27955L6.92715 3.37649ZM10.4638 0L9.3197 0.851929L13.5747 6.5791L14.7189 5.72717L10.4638 0ZM4.07373 13.1445H11.2035V11.7169H4.07373V13.1445Z" fill="currentColor"/>
  `;
  const soProfileRegEx = /stackoverflow\.com\/(?:users|u)\/(\d+)(?:\/([^\/]+))?/;

  function replaceSOLinks() {
    // Attempt to get links
    const els = document.querySelectorAll(elSelector);
    const filteredEls = Array.from(els).filter(el => el.querySelector(linkSelector).href.includes(stackDomain))

    // If profile has no SO link(s) - exit
    if (filteredEls.length < 1) {
      return;
    }

    filteredEls.forEach(el => {
      // Change Icon
      const svgEl = el.querySelector(svgSelector);
      svgEl.innerHTML = iconPaths;

      // Extract text
      const linkEl = el.querySelector(linkSelector)
      const text = linkEl.innerHTML;
      const match = text.match(soProfileRegEx);
      const userId = match ? match[1] : null;
      const userName = match && match[2] ? match[2] : null;

            // Change text
      if (!!userName && !!userId) {
        linkEl.innerHTML = `${userName}`;
      } else if (!!userId) {
        linkEl.innerHTML = `user:${userId}`;
      }
    });
  }

  // Run for first time
  if (logging) { console.log(`${logName}: Run on first load`); }
  replaceSOLinks();

  // Set up URL change listener
  let lastURL = window.location.href;
  const observer = new MutationObserver(() => {
    if (window.location.href === lastURL) { return; }

    lastURL = window.location.href;
    if (logging) { console.log(`${logName}: URL chaged, re-running`); }
    replaceSOLinks();
  });

  observer.observe(document.body, { childList: true, subtree: true });
})();