/**
 * Compute the staleness score for a set of changed files.
 *
 * Scoring model (deliberately simple, documented in docs/preflight.md):
 *
 *   per-file weight =
 *     1                          base
 *     + 2 if any node in the file is a hub (is_hub = 1)
 *     + min(3, ceil(maxFanIn/5)) for the heaviest fan-in in the file
 *
 *   staleness_score = sum(per-file weight) over files that map to nodes in
 *                     the graph; files not in the graph are reported but do
 *                     not contribute to the score (we cannot reason about
 *                     them without re-analyzing).
 *
 * This is intentionally a heuristic — a hub change matters more than a leaf
 * change, but we never claim it's a true blast-radius computation. It is the
 * cheapest signal that distinguishes "noisy editor save" from "ripped out a
 * central module."
 */
export interface FileScore {
    filePath: string;
    /** Whether the file appears in the graph at all. */
    inGraph: boolean;
    /** Did the file contain at least one hub? */
    hub: boolean;
    /** Max fan-in across nodes in the file. */
    maxFanIn: number;
    /** Number of nodes in the file. */
    nodeCount: number;
    /** Weight contribution. */
    weight: number;
}
export interface ScoreResult {
    perFile: FileScore[];
    totalScore: number;
    hubCount: number;
    leafCount: number;
    /** Files not represented in the graph at all (e.g. new files). */
    unknownFiles: string[];
}
export declare function scoreChangedFiles(repoRoot: string, changedFiles: string[]): ScoreResult;
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