Function getAssistantMessageContentLength

src/utils/tokens.ts:183–199

(
  message: AssistantMessage,
)

 * Note: signature_delta is excluded from streaming counts (not model output).
 */
export function getAssistantMessageContentLength(
  message: AssistantMessage,
): number {
  let contentLength = 0
  for (const block of message.message.content) {
    if (block.type === 'text') {
      contentLength += block.text.length
    } else if (block.type === 'thinking') {
      contentLength += block.thinking.length
    } else if (block.type === 'redacted_thinking') {
      contentLength += block.data.length
    } else if (block.type === 'tool_use') {
      contentLength += jsonStringify(block.input).length
    }
  }
  return contentLength
}

/**
 * Get the current context window size in tokens.