Welcome to coldHat Setup

Type this into Claude, ChatGPT or Grok. Put any GitHub user name in place of vince-gonzalez.

open sesame coldhat.f-keys.com/u/vince-gonzalez

The assistant reads the hat, answers with its hat code to prove it read it, and works by those rules for the rest of the chat.

Make your hat >Chat can't browse?

Chat can't read the web?

Copy the hat itself and paste it in. This works in every chat.

Add it once as a connector

In apps that take MCP connectors (ChatGPT, Claude, Cursor and others), add this address once. After that, ask for any hat by name.

https://coldhat.f-keys.com/mcp

Where it works

Claude	Reads the hat from its address
ChatGPT	Reads the hat from its address
Grok	Reads the hat from its address
Gemini	Does not: paste the hat instead
Perplexity	Not yet: paste the hat instead

Tested 2026-10-10. Results.

Make your own

Write your hat in the browser and save it to your GitHub. Or by hand:

Create your hat from the starter and name the repository coldhat. Keep it public.
Edit hat.md: your rules, your voice, and dated facts under ## Status.
Type open sesame coldhat.f-keys.com/u/<your-github-user>. It is live within five minutes of each edit.

More hats go in hats/<name>.md and live at /u/<you>/<name>. Only you can change your hats, because only you can push to your repository.

Safe by design

Hats are public, so never put a password, key or private detail in one. A hat can only describe how to work: every hat page tells the assistant to ignore it unless you asked for it, and never to ask you for passwords, codes or payment details. Report a hat.