/**
 * Workload heat persistence (SP-215, #115).
 *
 * Operator-local histogram persistence under `.pi-smart-router/` (already
 * gitignored) with a versioned, provenance-stamped artifact. The artifact is
 * also the export/import interchange format — copy the file to export, drop
 * an artifact at the path to import, delete the file (or call
 * `clearWorkloadHeatFile`) to clear. Privacy contract: heat keys are
 * requirement fingerprints (SHA-256 of rounded requirement vectors) or
 * operator cluster ids — never prompt text, messages, or tool arguments.
 */
import { WorkloadHeatMap, type HeatProvenance, type WorkloadHeatArtifact } from '../../domain/routing/workload-heat.js';
export declare const WORKLOAD_HEAT_FILENAME = "workload-heat.json";
export declare function getWorkloadHeatPath(cwd?: string): string;
/**
 * Load the persisted histogram, or an empty map when the file is missing or
 * malformed (fail open with a warning — heat is a soft bias, never a gate).
 */
export declare function loadWorkloadHeatMap(cwd?: string, options?: {
    readonly maxEntries?: number;
}): WorkloadHeatMap;
/**
 * Persist the histogram with provenance. Creates `.pi-smart-router/` when
 * needed. Write failures propagate (fail loud — the caller decides).
 */
export declare function saveWorkloadHeatMap(map: WorkloadHeatMap, cwd?: string, provenance?: Partial<HeatProvenance>): WorkloadHeatArtifact;
/**
 * Clear the persisted histogram (router-reset analog). Returns true when a
 * file was removed; false when nothing was persisted.
 */
export declare function clearWorkloadHeatFile(cwd?: string): boolean;
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