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Google AI - Default to AI Mode & 2.5 Pro (Gemini)

Defaults Google searches to AI Mode and selects the "2.5 Pro" model.

当前为 2025-07-25 提交的版本，查看 最新版本。

// ==UserScript==
// @name         Google AI - Default to AI Mode & 2.5 Pro (Gemini)
// @namespace    http://tampermonkey.net/
// @version      3.1
// @description  Defaults Google searches to AI Mode and selects the "2.5 Pro" model.
// @author       JP - Discord: @Organism
// @match        https://www.google.com/search*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    // --- Part 1: Redirect to AI Mode ---
    // This part runs immediately to check if the URL needs to be changed.
    const url = new URL(window.location.href);

    // If the URL is a search (has a 'q=' parameter) but is not already AI Mode ('udm=50'),
    // this will add the correct parameter and reload the page.
    if (url.searchParams.has('q') && url.searchParams.get('udm') !== '50') {
        url.searchParams.set('udm', '50');
        window.location.href = url.toString();
        return; // Stop the script here, as the page will be reloaded.
    }

    // --- Part 2: Select 2.5 Pro Model ---
    // This part only runs on the AI Mode page to select the model.
    // It must wait for the page content to load.
    function setupModelSelector() {
        const TOGGLE_BUTTON_XPATH = "//div[contains(@class, 'tk4Ybd') and .//span[text()='AI Mode']]";
        const PRO_MODEL_ITEM_XPATH = "//g-menu-item[.//span[text()='2.5 Pro']]";

        function findElement(xpath) {
            return document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
        }

        const observer = new MutationObserver((mutations, obs) => {
            const proMenuItem = findElement(PRO_MODEL_ITEM_XPATH);

            if (proMenuItem) {
                if (proMenuItem.getAttribute('aria-checked') === 'true') {
                    obs.disconnect(); // Already selected
                } else {
                    proMenuItem.click(); // Select it
                    obs.disconnect();
                }
                return;
            }

            const toggleButton = findElement(TOGGLE_BUTTON_XPATH);
            if (toggleButton) {
                toggleButton.click(); // Open the menu
            }
        });

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

    // Wait for the basic page structure to be ready before trying to find elements.
    document.addEventListener('DOMContentLoaded', setupModelSelector);

})();