[GreaseMonkey] Fix Github Gist Search (search my own gists easily)

Gists.js

// ==UserScript==
// @name         Search My Gists
// @namespace    https://unitycoder.com/
// @version      09.10.2026
// @description  Automatically add the logged-in username to Gist searches.
// @match        https://gist.github.com/*
// @run-at       document-idle
// @grant        none
// ==/UserScript==

 (function () {
     'use strict';

     function updateSearch() {
         const avatar = document.querySelector('img.avatar-user[alt^="@"]');
         if (!avatar) return;

         const username = avatar.getAttribute('alt').slice(1);
         if (!/^[a-zA-Z0-9-]+$/.test(username)) return;

         const search = document.querySelector('form[action*="/search"] input[name="q"], input[name="q"][type="search"]');
         if (!search || search.dataset.gistUserAdded) return;

         const qualifier = `user:${username}`;
         const current = search.value.trim()+" ";

         if (!/\buser:\S+/i.test(current)) {
             search.value = current ? `${qualifier} ${current}` : `${qualifier}`;
         }

         search.dataset.gistUserAdded = 'true';
     }

     updateSearch();

     const observer = new MutationObserver(updateSearch);
     observer.observe(document.body, { childList: true, subtree: true });
 })();