import type { VisualLayoutPositions, VisualLayoutRoutes } from './protocol-contract.js';
/** Where every host writes a projection's sidecar, and reads it back from. */
export declare const LAYOUT_SIDECAR_DIR = ".yarramate/visual-layout";
export declare const layoutSidecarPath: (projectionId: string) => string;
/** A path a store or directory holds that could be a sidecar. */
export declare const isLayoutSidecarPath: (path: string) => boolean;
export interface LayoutSidecars {
    readonly layouts: Record<string, VisualLayoutPositions>;
    readonly folds: Record<string, {
        folded: string[];
        unfolded: string[];
    }>;
    readonly routes: Record<string, VisualLayoutRoutes>;
}
/**
 * What the sidecars say, keyed by the projection id each one names.
 *
 * Presentation state must never fail a session (ADR 0023): a source that does
 * not parse or does not validate is skipped, not reported. A sidecar written
 * before #473 has neither fold list and says nothing about folding rather
 * than "fold nothing" - the view's own default decides - so only a sidecar
 * that STATES a fold yields a `folds` entry. A sidecar written before the
 * routes says nothing about them, and the layout recomputes.
 */
export declare const readLayoutSidecars: (sources: Iterable<{
    readonly path: string;
    readonly source: string;
}>) => LayoutSidecars;