OptionalcategoryOptional category for grouping placeholders in UI
OptionaldescriptionOptional description of what this placeholder provides
Async function that returns the placeholder value
The placeholder name (e.g., '_CURRENT_DATE')
OptionalrequiresWhat the value reads from the prompt parameters; [] means nothing (clock or environment), absent means it may read anything
Defines a system placeholder that can be used in prompt templates.
SystemPlaceholder