Filter AI slop on X with Jev

Jev can blur posts on X that read as generic or repetitive. You choose which ones to reveal.

Download the kit, ask your assistant to prepare it, and activate it in Chrome. You can also follow the manual option.

Before you start

You need Chrome on a computer and an API key from TypeSafe. Create a key in your account’s API keys section. For the assisted option, use Codex or Claude Code with access to a local folder.

While active, the filter sends post text to TypeSafe and may use your account’s credits. Jev can make mistakes: it does not prove AI authorship or analyze images and videos.

1. Download the kit

Download the Jev filter for X (.zip)

Extract the ZIP and keep the Folder: jev-x-filter folder somewhere permanent. Chrome will keep using that location, so avoid moving it afterward.

2. Prepare the filter

Set up the Jev kit for X in the folder I have open.

1. Check that it contains server.mjs, .env.example, and extension/manifest.json. If this is the wrong folder, ask me to open jev-x-filter.
2. Check that I have Node.js 22 or later. If missing, guide me through installing it from nodejs.org.
3. If .env is missing, create it from .env.example. Preserve it if it already exists. Tell me how to open it so I can save my TypeSafe API key myself. Do not ask me to paste the key into chat or display the file's contents.
4. Once I confirm I saved the key, run node --env-file=.env server.mjs from this folder. If port 3333 is occupied, explain how I can close the previous instance; do not stop other processes yourself.
5. Check that http://127.0.0.1:3333/health responds with ok: true. This only confirms the local server is running; do not make TypeSafe requests to test it.
6. Give me the exact path of the extension subfolder to load in Chrome. If you cannot keep the server running, give me the command and folder to start it in my terminal.

Use the kit's files. When finished, explain what you prepared and remind me to load the extension in Chrome and activate the filter from the X console.

3. Activate it in Chrome

These steps are the same for both options. Complete them in the Chrome browser where you use X.

1. Load the extension in Chrome

   Type chrome://extensions into the address bar. Enable Developer mode, click Load unpacked, and select the kit’s Folder: extension subfolder.

   You will see Jev · X blur among your extensions. Open x.com/home and reload the page. If you have an older version of the filter, disable it first to prevent both versions from processing the same posts.

2. Activate it from the X console

   With X open, press Ctrl + Shift + J on Windows or Command + Option + J on Mac. Select the Console tab in developer tools. Paste this and press Enter:

   X console · start

   Copy

   window.postMessage({ type: "JEV_START" }, location.origin);

   Chrome may warn you about pasting code. Read the command and follow the on-screen instruction if you choose to enable pasting. This command tells the installed extension to start filtering.

   Once [Jev] Filter active appears, you can close developer tools and scroll through your feed. The kit blurs posts when Jev’s score reaches 0.8. That score reflects the filter’s criterion; it is not proof of AI authorship.

Use it as you browse

Click Show post to read any blurred post. Blur again restores the effect. The filter preserves the post’s size.

Each activation allows up to 100 new requests in that tab. At the limit, it stops analyzing and logs a console message. Paste the start command again to continue. Recent results are reused in memory; closing or reloading can cause new requests.

To stop the filter and remove all blurs, paste:

window.postMessage({ type: "JEV_STOP" }, location.origin);

A request already sent may still finish and use credits. To shut down the local server, return to its terminal and press Ctrl + C.

Next time: start the server, open X, and paste the start command. Activate it again after reloading X or opening another tab. The kit stops when you enter messages and skips posts shorter than 20 or longer than 12,000 characters.