chess_psychologist

Privacy Policy – Chess Psychologist

Last updated: February 2026

What this extension does

Chess Psychologist is a Chrome extension that provides mental coaching while you play chess on lichess.org and chess.com. It displays a panel on the game page and lets you send messages to an AI assistant.

Data collected

This extension does not collect, store, or transmit any personal data.

• It does not track your chess moves or game results beyond what is sent in a single session message.
• It does not store your conversation history anywhere outside your browser session.
• It does not use analytics, cookies, or any form of tracking.

How it works

When you interact with the extension, your message (e.g. “I’m on tilt”) is sent to a local backend server running on your own machine (localhost:8000). That server forwards the message to the Anthropic API to generate a response. Your Anthropic API key is stored only on your machine in a local .env file and is never shared with anyone.

Third-party services

The extension relies on the Anthropic API to generate responses. Please refer to Anthropic’s privacy policy for information on how they handle data.

Contact

If you have any questions, please open an issue at github.com/idoba2030/chess_psychologist.