import type { NormalizedEvent } from '../../agent-adapter/normalize/event-types.js';
import type { Backend } from '../../agent-adapter/types.js';
export type AgentSlot = 'parent' | 'benchmark-coder' | 'benchmark-reviewer' | 'benchmark-fixer';
export declare class TrajectoryWriteFailedError extends Error {
    readonly reason: "trajectory_write_failed";
    constructor(message?: string, options?: {
        cause?: unknown;
    });
}
export interface JournalHeaderInput {
    rootRunId: string;
    threadId: string | null;
    agentSlot: AgentSlot;
    resolvedCwd: string;
    canonicalInstructionSha256: string;
    modelVisiblePromptSha256: string;
    systemPromptSha256: string;
    toolManifestSha256: string;
    pluginManifestSha256: string;
    modelExecutionIdentityHash: string;
    roleToolSurfaceHash: string;
    bundleManifestHash: string;
}
export interface JournalEventIdentity {
    modelExecutionIdentityHash: string;
    roleToolSurfaceHash: string;
    bundleManifestHash: string;
}
export interface JournalEventInput {
    threadId: string | null;
    step: number | null;
    agentSlot: AgentSlot;
    backend: Backend;
    provider: string | null;
    requestedModel: string;
    reportedModel: string | null;
    event: NormalizedEvent;
    identity?: JournalEventIdentity;
}
export interface Journal {
    readonly path: string;
    readonly header: Readonly<Record<string, unknown>>;
    readonly eventCount: number;
    writeEvent(input: JournalEventInput): Readonly<Record<string, unknown>>;
    sha256(): string;
    close(): Promise<void>;
}
export declare function openJournal(options: {
    path: string;
    header: JournalHeaderInput;
    now?: () => Date;
}): Journal;