Function checkSandboxAutoAllow

src/tools/BashTool/bashPermissions.ts:1270–1359

* Checks if a command should be auto-allowed when sandboxed. * Returns early if there are explicit deny/ask rules that should be respected. * * NOTE: This function should only be called when sandboxing and auto-allow are enabled. * * @param input - The bash tool input * @param toolPermissionCo

(
  input: z.infer<typeof BashTool.inputSchema>,
  toolPermissionContext: ToolPermissionContext,
)

 *   - passthrough should not occur since we're in auto-allow mode
 */
function checkSandboxAutoAllow(
  input: z.infer<typeof BashTool.inputSchema>,
  toolPermissionContext: ToolPermissionContext,
): PermissionResult {
  const command = input.command.trim()

  // Check for explicit deny/ask rules on the full command (exact + prefix)
  const { matchingDenyRules, matchingAskRules } = matchingRulesForInput(
    input,
    toolPermissionContext,
    'prefix',
  )

  // Return immediately if there's an explicit deny rule on the full command
  if (matchingDenyRules[0] !== undefined) {
    return {
      behavior: 'deny',
      message: `Permission to use ${BashTool.name} with command ${command} has been denied.`,
      decisionReason: {
        type: 'rule',
        rule: matchingDenyRules[0],
      },
    }
  }

  // SECURITY: For compound commands, check each subcommand against deny/ask
  // rules. Prefix rules like Bash(rm:*) won't match the full compound command
  // (e.g., "echo hello && rm -rf /" doesn't start with "rm"), so we must
  // check each subcommand individually.
  // IMPORTANT: Subcommand deny checks must run BEFORE full-command ask returns.
  // Otherwise a wildcard ask rule matching the full command (e.g., Bash(*echo*))
  // would return 'ask' before a prefix deny rule on a subcommand (e.g., Bash(rm:*))
  // gets checked, downgrading a deny to an ask.
  const subcommands = splitCommand(command)
  if (subcommands.length > 1) {
    let firstAskRule: PermissionRule | undefined
    for (const sub of subcommands) {
      const subResult = matchingRulesForInput(
        { command: sub },
        toolPermissionContext,
        'prefix',
      )
      // Deny takes priority — return immediately
      if (subResult.matchingDenyRules[0] !== undefined) {
        return {
          behavior: 'deny',
          message: `Permission to use ${BashTool.name} with command ${command} has been denied.`,
          decisionReason: {
            type: 'rule',
            rule: subResult.matchingDenyRules[0],
          },
        }
      }
      // Stash first ask match; don't return yet (deny across all subs takes priority)
      firstAskRule ??= subResult.matchingAskRules[0]
    }
    if (firstAskRule) {
      return {