/**
 * Format the visible "ByteRover returns N memories: …" line that the
 * UserPromptSubmit hook emits via `systemMessage`. Pure function so it can
 * be unit-tested without filesystem or clock dependencies — the caller is
 * responsible for resolving each entry's age before calling.
 */
export interface VisibleSummaryEntry {
    /** Path as it should be rendered. Caller is responsible for stripping the .brv/context-tree/ prefix. */
    path: string;
    /** Last-modified (or originally-curated) date; omit when no signal is available. */
    age?: Date;
    /** Per-result relevance score from `brv query --format json`'s `matchedDocs[].score` (0..1). Omit when unavailable. */
    score?: number;
}
export interface BuildVisibleSummaryOptions {
    /** Override the reference clock for deterministic age computation in tests. */
    now?: Date;
}
export declare function buildVisibleSummary(entries: readonly VisibleSummaryEntry[], options?: BuildVisibleSummaryOptions): string;