Parameters

Parameter	Required	Default	Description
content	Yes	—	Text of the message. An empty content raises the error “Message text is required.”
returnMessageID	No	no	yes/true makes the function return the ID of the sent message; no/false returns an empty string. Any other value raises an error.

The message is sent to the channel selected with $useChannel if any, otherwise to the current channel. A bare $sendMessage or $sendMessage[] is refused: at least one argument is required, and an empty content is an error.

Slash commands do not require an explicit send

This is a complete BDFD slash response:

Hello $username!

This is a complete embed-only response:

$title[Announcement]
$description[This is an important announcement.]
$color[#FF0000]

The compiler emits the pending response automatically. Do not append an empty send to every example. Keep the mutations belonging to one response together; action boundaries can flush a pending response.

Examples: Explicit Send

$sendMessage[Hello world!]

For another channel, read $channelSendMessage. The second $sendMessage argument is the returnMessageID flag (yes/no), not a channel ID.

Use Message Blocks when editing visual actions: respondWithMessage handles interaction replies and sendMessage sends channel messages. See Execution model for the distinction between authoring modes.