import type { TokenUsage } from "./token-telemetry.js";
export type TokenCompactionSummarizeOptions = {
    readonly body: {
        readonly modelID: string;
        readonly providerID: string;
    };
    readonly path: {
        readonly id: string;
    };
    readonly query: {
        readonly directory: string;
    };
};
export type CompactionMeasurement = {
    readonly aggregate: TokenUsage;
    readonly measured: true;
    readonly ratio: number;
} | {
    readonly aggregate: TokenUsage;
    readonly measured: false;
    readonly reason: string;
};
export type CompactionAttempt = {
    readonly afterMeasurement: {
        readonly measured: false;
        readonly reason: string;
    };
    readonly beforeMeasurement: CompactionMeasurement;
    readonly request?: TokenCompactionSummarizeOptions;
    readonly reason?: string;
    readonly status: "failed" | "skipped" | "triggered";
    readonly timestamp: string;
};
export declare function writeCompactionAttempt(evidenceDir: string, sessionID: string, attempt: CompactionAttempt): string;
export declare function compactionEvidenceCooldownUntil(evidenceDir: string, sessionID: string, cooldownMs: number): number;