Function handleCompletion

client/src/lib/hooks/useConnection.ts:282–332

(
    ref: ResourceReference | PromptReference,
    argName: string,
    value: string,
    context?: Record<string, string>,
    signal?: AbortSignal,
  )

  };

  const handleCompletion = async (
    ref: ResourceReference | PromptReference,
    argName: string,
    value: string,
    context?: Record<string, string>,
    signal?: AbortSignal,
  ): Promise<string[]> => {
    if (!mcpClient || !completionsSupported) {
      return [];
    }

    const request: ClientRequest = {
      method: "completion/complete",
      params: {
        argument: {
          name: argName,
          value,
        },
        ref,
      },
    };

    if (context) {
      request["params"]["context"] = {
        arguments: context,
      };
    }

    try {
      const response = await makeRequest(request, CompleteResultSchema, {
        signal,
        suppressToast: true,
      });
      return response?.completion.values || [];
    } catch (e: unknown) {
      // Disable completions silently if the server doesn't support them.
      // See https://github.com/modelcontextprotocol/specification/discussions/122
      if (e instanceof McpError && e.code === ErrorCode.MethodNotFound) {
        setCompletionsSupported(false);
        return [];
      }

      // Unexpected errors - show toast and rethrow
      toast({
        title: "Error",
        description: e instanceof Error ? e.message : String(e),
        variant: "destructive",
      });
      throw e;
    }
  };

  const sendNotification = async (notification: ClientNotification) => {
    if (!mcpClient) {