Function createPlanAttachmentIfNeeded

src/services/compact/compact.ts:1470–1486

(
  agentId?: AgentId,
)

 * This ensures the plan is preserved after compaction.
 */
export function createPlanAttachmentIfNeeded(
  agentId?: AgentId,
): AttachmentMessage | null {
  const planContent = getPlan(agentId)

  if (!planContent) {
    return null
  }

  const planFilePath = getPlanFilePath(agentId)

  return createAttachmentMessage({
    type: 'plan_file_reference',
    planFilePath,
    planContent,
  })
}

/**
 * Creates an attachment for invoked skills to preserve their content across compaction.