Function registerElicitationHandler

src/services/mcp/elicitationHandler.ts:68–212

(
  client: Client,
  serverName: string,
  setAppState: (f: (prevState: AppState) => AppState) => void,
)

}

export function registerElicitationHandler(
  client: Client,
  serverName: string,
  setAppState: (f: (prevState: AppState) => AppState) => void,
): void {
  // Register the elicitation request handler.
  // Wrapped in try/catch because setRequestHandler throws if the client wasn't
  // created with elicitation capability declared.
  try {
    client.setRequestHandler(ElicitRequestSchema, async (request, extra) => {
      logMCPDebug(
        serverName,
        `Received elicitation request: ${jsonStringify(request)}`,
      )

      const mode = getElicitationMode(request.params)

      logEvent('tengu_mcp_elicitation_shown', {
        mode: mode as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
      })

      try {
        // Run elicitation hooks first - they can provide a response programmatically
        const hookResponse = await runElicitationHooks(
          serverName,
          request.params,
          extra.signal,
        )
        if (hookResponse) {
          logMCPDebug(
            serverName,
            `Elicitation resolved by hook: ${jsonStringify(hookResponse)}`,
          )
          logEvent('tengu_mcp_elicitation_response', {
            mode: mode as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
            action:
              hookResponse.action as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
          })
          return hookResponse
        }

        const elicitationId =
          mode === 'url' && 'elicitationId' in request.params
            ? (request.params.elicitationId as string | undefined)
            : undefined

        const response = new Promise<ElicitResult>(resolve => {
          const onAbort = () => {
            resolve({ action: 'cancel' })
          }

          if (extra.signal.aborted) {
            onAbort()
            return
          }

          const waitingState: ElicitationWaitingState | undefined =
            elicitationId ? { actionLabel: 'Skip confirmation' } : undefined