Privacy note / Last updated July 2026

Plain-language privacy.

The public site can be read without a chat. The chat is optional and starts only after you acknowledge the recording notice.

What the chat stores

When you choose to chat, the site stores your messages, the AI responses, a random chat-session ID, and timestamps in a Cloudflare D1 database. To protect the service from automated abuse, it also stores a short, one-way identifier derived from Cloudflare’s edge IP header using a secret-key hash; the raw IP address is not stored. The chat does not ask for your name, email address, or phone number. Do not put sensitive, personal, financial, medical, or confidential information into the chat.

Why it is stored

Zhitao reviews aggregate questions and selected transcripts to understand what visitors want to know and to improve the website’s public profile. Transcripts are not used to train a model. Old transcripts are automatically eligible for deletion after 30 days; each new chat request runs the cleanup routine. You can delete the current session at any time from the chat panel.

Model provider

Your chat messages are sent from the site’s server to OpenRouter so an AI model can generate a response. OpenRouter may route the request to an underlying model provider. Review OpenRouter’s privacy policy before using the chat if you need provider-level detail.

Questions or deletion requests

For a question about this note or a request relating to a chat you created, email kouzt123@gmail.com. This is a practical privacy note for a personal website, not legal advice.