/**
 * The minimum a tile needs. Structural rather than tied to ShotRecord, so the
 * backlog can composite a cluster's evidence without rehydrating capture
 * records it does not hold.
 */
export interface SheetShot {
    target: string;
    route: string;
    state: string;
    formFactor: string;
    scheme: string;
    /** Path relative to the evidence directory. */
    path: string;
}
/** Beyond this the sheet stops being readable, so it is capped and said so. */
export declare const MAX_TILES = 24;
export interface SheetTile {
    shot: SheetShot;
    /** Findings on this shot, drawn as a count badge. */
    findings?: number;
}
export interface SheetResult {
    path: string;
    tiles: number;
    omitted: number;
    columns: number;
    rows: number;
}
/**
 * Composite `tiles` into `outPath`. Returns null when there is nothing to draw
 * or sharp cannot read the inputs; a missing sheet must never fail a run.
 */
export declare function buildContactSheet(tiles: SheetTile[], evidenceDir: string, outPath: string): Promise<SheetResult | null>;
/** The line telling a session to look at the sheet it just produced. */
export declare function sheetNote(sheet: SheetResult | null): string;