import type { EvoPaths } from "../paths.ts";
import type { UsageSummary } from "../types.ts";
export interface SessionDigestMetrics {
    tasks: number;
    userMessages: number;
    assistantMessages: number;
    toolResults: number;
    followUpUserMessages: number;
    toolCalls: number;
    toolErrors: number;
    toolDurationMs: number;
    verificationRuns: number;
    verificationPassed: number;
    verificationFailed: number;
    preferenceSignals: number;
    compactions: number;
    compactionRetries: number;
    compactionDurationMs: number;
    compactionTokensBefore: number;
    usage: UsageSummary;
}
export type SessionTaskClass = "coding" | "research" | "tool-use" | "conversation";
export interface SessionDigest {
    schemaVersion: 2;
    sessionId: string;
    bundleDigest: string | null;
    taskClass: SessionTaskClass;
    cwd?: string;
    startedAt?: string;
    endedAt?: string;
    complete: boolean;
    firstSequence: number;
    lastSequence: number;
    sourceDigest: string;
    models: string[];
    preferenceEvidence: Array<{
        sequence: number;
    }>;
    assessment: {
        verification: "passed" | "failed" | "not-observed";
        comparisonEligible: boolean;
        exclusionReasons: string[];
    };
    metrics: SessionDigestMetrics;
}
export declare function buildSessionDigest(paths: EvoPaths, sessionId: string): Promise<SessionDigest | undefined>;
export declare function readSessionDigest(paths: EvoPaths, sessionId: string): Promise<SessionDigest | undefined>;
export declare function listSessionDigests(paths: EvoPaths): Promise<SessionDigest[]>;
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