import { GitHubClient } from '../../types/github-client';
import { UpdateMode } from '../../types/update-mode';
import { TagInfo } from '../../types/tag-info';
interface GetCompatibleUpdateParameters {
    /**
     * Optional in-memory cache for resolved tag SHAs.
     */
    shaCache?: Map<string, string | null>;
    /**
     * Update mode that limits which tag can be selected.
     */
    mode: Exclude<UpdateMode, 'major'>;
    /**
     * Optional in-memory cache for action tags.
     */
    tagsCache?: Map<string, TagInfo[]>;
    /**
     * Current action version used as compatibility baseline.
     */
    currentVersion: string | null;
    /**
     * Action name in `owner/repo` format (path suffix is allowed).
     */
    actionName: string;
}
/**
 * Resolve the newest compatible update for an action.
 *
 * @param client - GitHub client instance.
 * @param parameters - Lookup parameters.
 * @returns Compatible target version and SHA, or null when none found.
 */
export declare function getCompatibleUpdate(client: GitHubClient, parameters: GetCompatibleUpdateParameters): Promise<{
    sha: string | null;
    version: string;
} | null>;
export {};