Function getTokenUsageAttachment

src/utils/attachments.ts:3889–3908

(
  messages: Message[],
  model: string,
)

}

function getTokenUsageAttachment(
  messages: Message[],
  model: string,
): Attachment[] {
  if (!isEnvTruthy(process.env.CLAUDE_CODE_ENABLE_TOKEN_USAGE_ATTACHMENT)) {
    return []
  }

  const contextWindow = getEffectiveContextWindowSize(model)
  const usedTokens = tokenCountFromLastAPIResponse(messages)

  return [
    {
      type: 'token_usage',
      used: usedTokens,
      total: contextWindow,
      remaining: contextWindow - usedTokens,
    },
  ]
}

function getOutputTokenUsageAttachment(): Attachment[] {
  if (feature('TOKEN_BUDGET')) {