diff --git a/chatgpt-chat-prefixer/ChatGPTChatPrefixer.user.js b/chatgpt-chat-prefixer/ChatGPTChatPrefixer.user.js
new file mode 100644
index 0000000..56ea0bb
--- /dev/null
+++ b/chatgpt-chat-prefixer/ChatGPTChatPrefixer.user.js
@@ -0,0 +1,126 @@
+// ==UserScript==
+// @name         Prefix ChatGPT chats with "S:"
+// @namespace    http://tampermonkey.net/
+// @version      2024-11-23
+// @description  For TOTALLY legit usage reasons...
+// @author       Sangeeth Sudheer
+// @match        https://chatgpt.com/c/*
+// @icon         https://www.google.com/s2/favicons?sz=64&domain=chatgpt.com
+// @updateURL    https://git.sangeeth.dev/x/userscripts/raw/branch/main/chatgpt-chat-prefixer/ChatGPTChatPrefixer.user.js
+// @downloadURL  https://git.sangeeth.dev/x/userscripts/raw/branch/main/chatgpt-chat-prefixer/ChatGPTChatPrefixer.user.js
+// @grant        none
+// ==/UserScript==
+
+(function() {
+    'use strict';
+
+    const PREFIX = "S: ";
+
+    const sels = {
+        activeChatSidebarItem: '[data-testid^="history-item"]:has(> [class*="active"])',
+        renamePopoverItem: '[data-testid="share-chat-menu-item"] + div',
+    }
+
+    function triggerEnterKey(el) {
+        const event = new KeyboardEvent('keydown', {
+            key: 'Enter',
+            code: 'Enter',
+            bubbles: true
+        });
+
+        el.dispatchEvent(event);
+    }
+
+    function wait(ms) {
+        const { resolve, reject, promise } = Promise.withResolvers();
+
+        setTimeout(resolve, ms);
+
+        return promise;
+    }
+
+    function waitFor(sel, el = document) {
+        const { resolve, reject, promise } = Promise.withResolvers();
+        let count = 0;
+
+        function _wait() {
+            if (el.querySelector(sel)) {
+                resolve();
+            }
+
+            ++count;
+
+            if (count >= 5) {
+                reject();
+            }
+
+            setTimeout(_wait, 1000);
+        }
+
+        _wait();
+    }
+
+    let isRunning = false;
+
+    async function main() {
+        try {
+            if (isRunning) {
+                console.log("Script already running");
+                return;
+            }
+
+            isRunning = true;
+
+            const menuItem = document.querySelector(sels.activeChatSidebarItem);
+
+            if (!menuItem) {
+                console.log("Active chat menu item wasn't found. You're either not on the regular chat page or the markup has changed");
+                return;
+            }
+
+            const label = menuItem.querySelector("a").textContent.trim();
+
+            if (/new chat/i.test(label)) {
+                console.log("Chat label isn't yet autopopulated by LLM");
+                return;
+            }
+
+            if (label.startsWith(PREFIX)) {
+                console.log("No need to rename chat");
+                return;
+            }
+
+            triggerEnterKey(menuItem.querySelector("button"));
+            await wait(500);
+
+            document.querySelector(sels.renamePopoverItem).click();
+            await wait(2000);
+
+            const input = menuItem.querySelector("input");
+            const prevValue = input.value;
+
+            input.focus();
+            await wait(500);
+
+            input.value = `${PREFIX}${label}`;
+
+            if (input._valueTracker) {
+                input._valueTracker.setValue(prevValue);
+            }
+
+            const inputEvent = new Event('input', { bubbles: true });
+            input.dispatchEvent(inputEvent);
+
+            triggerEnterKey(input);
+            await wait(500);
+
+            console.log("Renamed chat");
+            isRunning = false;
+        } finally {
+            isRunning = false;
+        }
+    }
+
+
+    setInterval(main, 5000);
+})();