import type { AgencyNode } from "../types.js";
/**
 * Walk top-level program nodes once and collect the bookkeeping needed
 * for {@link isJsGlobalBase} (and similar shadowing checks). Cheap to
 * compute, but should be hoisted above the per-node walk so callers
 * don't pay it on every check.
 */
export declare function collectProgramShadowing(programNodes: readonly AgencyNode[]): {
    importedNodeNames: string[];
};