Function extractSystemText

src/utils/sideQuery.ts:118–125

* Extract system prompt text from the `system` option.

(system?: string | TextBlockParam[])

 * Extract system prompt text from the `system` option.
 */
function extractSystemText(system?: string | TextBlockParam[]): string {
  if (!system) return ''
  if (typeof system === 'string') return system
  return system
    .filter((b): b is { type: 'text'; text: string } => 'text' in b && !!b.text)
    .map(b => b.text)
    .join('\n\n')
}

/**
 * Convert Anthropic MessageParam[] to a list of {role, content} objects