Function getPlanModeAttachments

src/utils/attachments.ts:1186–1242

(
  messages: Message[] | undefined,
  toolUseContext: ToolUseContext,
)

}

async function getPlanModeAttachments(
  messages: Message[] | undefined,
  toolUseContext: ToolUseContext,
): Promise<Attachment[]> {
  const appState = toolUseContext.getAppState()
  const permissionContext = appState.toolPermissionContext
  if (permissionContext.mode !== 'plan') {
    return []
  }

  // Check if we should attach based on turn count (except for first turn)
  if (messages && messages.length > 0) {
    const { turnCount, foundPlanModeAttachment } =
      getPlanModeAttachmentTurnCount(messages)
    // Only throttle if we've already sent a plan_mode attachment before
    // On first turn in plan mode, always attach
    if (
      foundPlanModeAttachment &&
      turnCount < PLAN_MODE_ATTACHMENT_CONFIG.TURNS_BETWEEN_ATTACHMENTS
    ) {
      return []
    }
  }

  const planFilePath = getPlanFilePath(toolUseContext.agentId)
  const existingPlan = getPlan(toolUseContext.agentId)

  const attachments: Attachment[] = []

  // Check for re-entry: flag is set AND plan file exists
  if (hasExitedPlanModeInSession() && existingPlan !== null) {
    attachments.push({ type: 'plan_mode_reentry', planFilePath })
    setHasExitedPlanMode(false) // Clear flag - one-time guidance
  }

  // Determine if this should be a full or sparse reminder
  // Full reminder on 1st, 6th, 11th... (every Nth attachment)
  const attachmentCount =
    countPlanModeAttachmentsSinceLastExit(messages ?? []) + 1
  const reminderType: 'full' | 'sparse' =
    attachmentCount %
      PLAN_MODE_ATTACHMENT_CONFIG.FULL_REMINDER_EVERY_N_ATTACHMENTS ===
    1
      ? 'full'
      : 'sparse'

  // Always add the main plan_mode attachment
  attachments.push({
    type: 'plan_mode',
    reminderType,
    isSubAgent: !!toolUseContext.agentId,
    planFilePath,
    planExists: existingPlan !== null,
  })

  return attachments
}