import type { VersionDiffEntry, VersionDiffOptions } from "../../types.js";
import { type FilesystemOpsContext } from "./context.js";
/**
 * Compare the visible trees of two versions of this version root, both
 * addressed by numeric `versionId` as returned by `listHistory()`.
 *
 * `before` is `from`'s entry; `after` is `to`'s — reading "what changes if
 * `from` became `to`?" gives the natural interpretation. Like
 * `versionDiff(versionId)` this bypasses the label resolver, so either side
 * may be a deleted-but-retained version (e.g. one displaced by
 * `promoteTo(label, { dropPrevious: true })` under
 * `historyRetention: "retain"`); unlike it, the pair is unrestricted — any
 * two versions compare, adjacent or not, related or not. Equality is over
 * `node_type`, `blob_hash`, `mode`, and `symlink_target`; `mtime`,
 * `size_bytes`, and `created_at` are not part of the comparison.
 *
 * If `opts.path` is provided, the comparison is scoped to that user path
 * and its descendants. Tombstones in either version present as `null` for
 * that side.
 */
export declare const diffVersions: <TFs>(ctx: FilesystemOpsContext<TFs>, from: number, to: number, opts?: VersionDiffOptions) => Promise<VersionDiffEntry[]>;
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