Function getPlanModeExitAttachment

src/utils/attachments.ts:1250–1279

* Returns a plan_mode_exit attachment if we just exited plan mode. * This is a one-time notification to tell the model it's no longer in plan mode.

(
  toolUseContext: ToolUseContext,
)

 * This is a one-time notification to tell the model it's no longer in plan mode.
 */
async function getPlanModeExitAttachment(
  toolUseContext: ToolUseContext,
): Promise<Attachment[]> {
  // Only trigger if the flag is set (we just exited plan mode)
  if (!needsPlanModeExitAttachment()) {
    return []
  }

  const appState = toolUseContext.getAppState()
  if (appState.toolPermissionContext.mode === 'plan') {
    setNeedsPlanModeExitAttachment(false)
    return []
  }

  // Clear the flag - this is a one-time notification
  setNeedsPlanModeExitAttachment(false)

  const planFilePath = getPlanFilePath(toolUseContext.agentId)
  const planExists = getPlan(toolUseContext.agentId) !== null

  const verificationInstruction = isEnvTruthy(process.env.CLAUDE_CODE_VERIFY_PLAN)
    ? '\n\nWhen you have finished implementing the plan, you MUST call the "VerifyPlanExecution" tool directly to trigger background verification.'
    : undefined

  // Note: skill discovery does NOT fire on plan exit. By the time the plan is
  // written, it's too late — the model should have had relevant skills WHILE
  // planning. The user_message signal already fires on the request that
  // triggers planning ("plan how to deploy this"), which is the right moment.
  return [{ type: 'plan_mode_exit', planFilePath, planExists, verificationInstruction }]
}

function getAutoModeAttachmentTurnCount(messages: Message[]): {
  turnCount: number