import type { StaleFileComposition, StaleRegionComposition } from '../../types/index.js';
import type { FunctionNode } from './call-graph-types.js';
export type { StaleFileComposition, StaleRegionComposition, StaleRegionSymbol } from '../../types/index.js';
export interface ClosureFileSignificance {
    path: string;
    fanIn: number;
    fanOut: number;
    hasInternalNode: boolean;
    isTest: boolean;
}
/** Strict file order: fan-in desc, same winning node's fan-out desc, path asc. */
export declare function compareClosureSignificance(a: ClosureFileSignificance, b: ClosureFileSignificance): number;
/**
 * Aggregate symbol facts to files. The maximum-fan-in internal non-test node
 * wins; its fan-out breaks that tie. Files without such a node rank last.
 */
export declare function closureFileSignificance(paths: readonly string[], nodes: readonly FunctionNode[]): ClosureFileSignificance[];
/**
 * Spend one phase's budget deterministically. Under budget the input order is
 * returned untouched. Over budget, test candidates rank within their own class
 * and receive one slot when both classes are present, preventing systematic
 * test-to-production reachability starvation without changing the work count.
 */
export declare function spendClosureBudget(candidates: readonly string[], budget: number, nodes: readonly FunctionNode[]): {
    selected: string[];
    dropped: string[];
    usedPathFallback: boolean;
    testReachabilityDegraded: boolean;
};
/** Compute per-file receipts so clearing one stale file also clears its contribution. */
export declare function composeStaleFiles(files: readonly string[], nodes: readonly FunctionNode[]): Map<string, StaleFileComposition>;
/** Combine persisted per-file receipts into the reported stale-region composition. */
export declare function combineStaleFileCompositions(files: readonly StaleFileComposition[], fileCount?: number): StaleRegionComposition;
/** Render repository-derived names through the shared terminal safety boundary. */
export declare function formatStaleRegionComposition(composition: StaleRegionComposition): string;
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