The content of the message
OptionalproviderPer-message provider options resolved at load from the role tag's options attribute and
matching config.messageOptions sets. Authored as <system options="set_a set_b">.
options is the only supported role-tag attribute and must have a value. Omitted when the tag
has no effective options.
The message role. Authored prompt blocks support 'system', 'user', and 'assistant'.
Represents a single message in a prompt conversation.
Example