Answer
Supported content is one HTTP(S) URL, exact text or supported Wi-Fi settings. A bare domain uses HTTPS. A link with “wifi” in its path remains a URL; say “QR containing exactly:” to encode literal words. Requests for a previous link can use the most recent matching message within the preceding 20 messages; ambiguous links need clarification.
Content is limited to 512 UTF-8 bytes and supported QR density. Scan the result at its intended size before relying on it. Hashchats checks decoding but cannot guarantee scanning under every physical condition.
Creation is charged as Text AI at $0.010 per 1,000 processed tokens, with no Image-generation fee or token minimum. Clarifications and failed generation are not charged. Private/group chats and scheduled Text requests support QR codes. Asking how QR codes work does not create one.