Function handleServerControlRequest

src/bridge/bridgeMessaging.ts:335–495

(
  request: SDKControlRequest,
  handlers: ServerControlRequestHandlers,
)

 * collaborators as params so both cores can use it.
 */
export function handleServerControlRequest(
  request: SDKControlRequest,
  handlers: ServerControlRequestHandlers,
): void {
  const {
    transport,
    sessionId,
    outboundOnly,
    onInterrupt,
    onSetModel,
    onSetMaxThinkingTokens,
    onSetPermissionMode,
  } = handlers
  if (!transport) {
    logForDebugging(
      '[bridge:repl] Cannot respond to control_request: transport not configured',
    )
    return
  }

  let response: SDKControlResponse

  // Outbound-only: reply error for mutable requests so claude.ai doesn't show
  // false success. initialize must still succeed (server kills the connection
  // if it doesn't — see comment above).
  const req = request.request as {
    subtype: string
    model?: string
    max_thinking_tokens?: number | null
    mode?: string
    [key: string]: unknown
  }
  if (outboundOnly && req.subtype !== 'initialize') {
    response = {
      type: 'control_response',
      response: {
        subtype: 'error',
        request_id: request.request_id,
        error: OUTBOUND_ONLY_ERROR,
      },
    }
    const event = { ...response, session_id: sessionId }
    void transport.write(event)
    logForDebugging(
      `[bridge:repl] Rejected ${req.subtype} (outbound-only) request_id=${request.request_id}`,
    )
    return
  }

  switch (req.subtype) {
    case 'initialize':
      // Respond with minimal capabilities — the REPL handles
      // commands, models, and account info itself.
      response = {
        type: 'control_response',
        response: {
          subtype: 'success',
          request_id: request.request_id,