claude-code/utils/systemPromptType.ts

/**
 * Branded type for system prompt arrays.
 *
 * This module is intentionally dependency-free so it can be imported
 * from anywhere without risking circular initialization issues.
 */

export type SystemPrompt = readonly string[] & {
  readonly __brand: 'SystemPrompt'
}

export function asSystemPrompt(value: readonly string[]): SystemPrompt {
  return value as SystemPrompt
}