export interface ProjectRef {
    projectId: string;
    rootPath: string;
    collectorVersion?: number | null;
}
/** Pure: which projects need re-deriving — older version AND repo present. */
export declare function selectProjectsToReindex(projects: ProjectRef[], current: number, existsFn?: (p: string) => boolean): {
    reindex: ProjectRef[];
    missing: ProjectRef[];
};
export interface MigrateResult {
    selected: number;
    reindexed: number;
    failed: number;
    missing: number;
}
export declare function runCollectorMigration(opts: {
    base: string;
    authHeaders: Record<string, string>;
    current: number;
    /** Re-derive one repo (collect + push). Returns success. Injected by the daemon. */
    reindex: (rootPath: string) => Promise<boolean>;
    fetchProjects?: () => Promise<ProjectRef[]>;
    existsFn?: (p: string) => boolean;
    log?: (m: string) => void;
}): Promise<MigrateResult>;
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