Leave the author a note

Awkward to use? Need a feature? Found a wrong number? Want a new tool? Write it here.

Notes go straight into a table only I read — nothing is shown publicly. For algorithm issues, tell me which image and which value looked wrong — that helps a lot.

What happens to these notes?

存到服务器上的一张表里，只有我自己能看（本地管理台 → 建议栏，或直接在服务器上跑 feedback_cli.py）。

Nothing is shown publicly and your contact details are never shared.

30-second spacing and a 10-per-day cap per IP — that's anti-spam, not a limit on feedback.

Stored: message, optional contact, source page, and a salted hash of the IP (anti-spam only; it cannot be reversed back to an IP).