Function getCommandPrefixImpl

source code/utils/shell/prefix.ts:174–332

(
  command: string,
  abortSignal: AbortSignal,
  isNonInteractiveSession: boolean,
  toolName: string,
  policySpec: string,
  eventName: string,
  querySource: QuerySource,
  preCheck?: (command: string) => CommandPrefixResult | null,
)

}

async function getCommandPrefixImpl(
  command: string,
  abortSignal: AbortSignal,
  isNonInteractiveSession: boolean,
  toolName: string,
  policySpec: string,
  eventName: string,
  querySource: QuerySource,
  preCheck?: (command: string) => CommandPrefixResult | null,
): Promise<CommandPrefixResult | null> {
  if (process.env.NODE_ENV === 'test') {
    return null
  }

  // Run pre-check if provided (e.g., isHelpCommand for Bash)
  if (preCheck) {
    const preCheckResult = preCheck(command)
    if (preCheckResult !== null) {
      return preCheckResult
    }
  }

  let preflightCheckTimeoutId: NodeJS.Timeout | undefined
  const startTime = Date.now()
  let result: CommandPrefixResult | null = null

  try {
    // Log a warning if the pre-flight check takes too long
    preflightCheckTimeoutId = setTimeout(
      (tn, nonInteractive) => {
        const message = `[${tn}Tool] Pre-flight check is taking longer than expected. Run with ANTHROPIC_LOG=debug to check for failed or slow API requests.`
        if (nonInteractive) {
          process.stderr.write(jsonStringify({ level: 'warn', message }) + '\n')
        } else {
          // biome-ignore lint/suspicious/noConsole: intentional warning
          console.warn(chalk.yellow(`⚠️  ${message}`))
        }
      },
      10000, // 10 seconds
      toolName,
      isNonInteractiveSession,
    )

    const useSystemPromptPolicySpec = getFeatureValue_CACHED_MAY_BE_STALE(
      'tengu_cork_m4q',
      false,
    )

    const response = await queryHaiku({
      systemPrompt: asSystemPrompt(
        useSystemPromptPolicySpec
          ? [
              `Your task is to process ${toolName} commands that an AI coding agent wants to run.\n\n${policySpec}`,
            ]
          : [
              `Your task is to process ${toolName} commands that an AI coding agent wants to run.\n\nThis policy spec defines how to determine the prefix of a ${toolName} command:`,
            ],
      ),