/**
 * Pruning Mask — builds a set of principle IDs to exclude from prompt injection.
 *
 * Consumes PruningReviewRecord[] (from listPruningReviews) and applies LWW
 * (Last Write Wins) semantics: for each principleId, only the latest decision
 * matters. archive-candidate → masked, keep/defer → not masked.
 *
 * Pure function, zero I/O, zero side effects.
 */
import type { PruningReviewRecord } from './pruning-review-log.js';
export declare function buildMaskedPrincipleSet(reviews: PruningReviewRecord[]): Set<string>;
/**
 * Returns a cached mask of principle IDs to exclude from injection.
 * Reads the review log from disk only once per TTL window (default 60s).
 *
 * @param workspaceDir - Workspace root directory
 * @param ttlMs        - Time-to-live in milliseconds (default 60_000)
 * @returns Set of principle IDs with latest decision = archive-candidate
 * @throws Propagates I/O errors from listPruningReviews so callers can degrade safely
 */
export declare function getCachedMaskedPrincipleSet(workspaceDir: string, ttlMs?: number): Set<string>;
/**
 * Clears the pruning mask cache.
 * Primarily useful for tests that need deterministic I/O timing.
 */
export declare function clearPruningMaskCache(): void;
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