import type { LoopRetentionPolicy, DailyTraceDigest, RetentionTier } from "../../domain/loop/retention-policy.js";
export interface CompactionResult {
    readonly tracesCompacted: number;
    readonly tracesDeleted: number;
    readonly scoresCompacted: number;
    readonly digestsCreated: number;
    readonly bytesFreed: number;
}
export declare function classifyTier(traceDate: string, now: Date, policy: LoopRetentionPolicy): RetentionTier;
export declare function compactLoopData(workspaceRoot: string, policy?: LoopRetentionPolicy): Promise<CompactionResult>;
export declare function readDigests(workspaceRoot: string): Promise<readonly DailyTraceDigest[]>;
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