Function nest

packages/hosts/mcp-apps-shell/src/shell/tools-proxy.ts:157–258

(path: string[], role: string | undefined)

 */
export const createToolsProxy = (request: ToolCallTransport): Record<string, unknown> => {
  const nest = (path: string[], role: string | undefined): unknown =>
    new Proxy(function () {}, {
      get(_target, key: string | symbol) {
        if (key === "then" || key === "toJSON" || key === Symbol.toPrimitive) return undefined;
        if (typeof key !== "string") return undefined;
        if (key === "queryOptions") {
          return (input?: unknown, options?: Omit<UseQueryOptions, "queryKey" | "queryFn">) =>
            queryOptions({
              ...options,
              queryKey: toolQueryKey(path, role, input === skipToken ? undefined : input),
              queryFn:
                input === skipToken
                  ? skipToken
                  : () =>
                      request({
                        path,
                        args: [input ?? {}],
                        ...(role === undefined ? {} : { role }),
                      }),
            });
        }
        if (key === "infiniteQueryOptions") {
          return (input?: unknown, options?: ToolInfiniteQueryOptions) => {
            const {
              cursorKey = DEFAULT_CURSOR_KEY,
              initialPageParam = null,
              ...rest
            } = options ?? {};
            return infiniteQueryOptions({
              ...rest,
              initialPageParam,
              queryKey: toolInfiniteQueryKey(path, role, input === skipToken ? undefined : input),
              queryFn:
                input === skipToken
                  ? skipToken
                  : ({ pageParam }: { pageParam: unknown }) =>
                      request({
                        path,
                        args: [withCursor(input, cursorKey, pageParam)],
                        ...(role === undefined ? {} : { role }),
                      }),
              // oxlint-disable-next-line executor/no-double-cast -- boundary: TanStack's option types are generic over the page-param type the model supplies at runtime
            } as unknown as UseInfiniteQueryOptions);
          };
        }
        if (key === "infiniteQueryKey") {
          return (input?: unknown) => toolInfiniteQueryKey(path, role, input);
        }
        if (key === "infiniteQueryFilter") {
          return (input?: unknown, filters?: Omit<QueryFilters, "queryKey">) => ({
            ...filters,
            queryKey: toolInfiniteQueryKey(path, role, input),
          });
        }
        if (key === "queryKey") {
          return (input?: unknown) => toolQueryKey(path, role, input);
        }
        if (key === "queryFilter") {