url is available (unfurl metadata
arrives later via message_changed). The fetchMessage callback is
provided when the URL points to another chat message on the same platform.
Properties
string
Description from unfurl metadata (if available)
() => Promise<Message<unknown>>
Type:
MessageIf this links to a chat message, fetch the full Messagestring
Preview image URL (if available)
string
Site name (e.g., “Vercel”)
string
Title from unfurl metadata (if available)
string
required
The URL