import type { CompactionPayloadInput, SessionSealedPayload, TraceEvent, TraceEventInput } from './types.js';
export interface TraceSink {
    write(event: TraceEventInput): Promise<void>;
    getTracePath(): string;
}
export interface TraceWriter extends TraceSink {
    seal(payload: SessionSealedPayload): Promise<void>;
    close(): Promise<void>;
}
export interface NdjsonTraceWriterOptions {
    traceDir: string;
    startSeq?: number;
}
export declare class NdjsonTraceWriter implements TraceWriter {
    private readonly traceDir;
    private readonly tracePath;
    private seq;
    private sealed;
    private sealRecordPersisted;
    private fh;
    private writeQueue;
    constructor(options: NdjsonTraceWriterOptions);
    getTracePath(): string;
    write(event: TraceEventInput): Promise<void>;
    seal(payload: SessionSealedPayload): Promise<void>;
    close(): Promise<void>;
    private enqueue;
    private ensureOpen;
    private closeHandle;
    sealOnProcessExit(): void;
    private appendLine;
    private materializePersistedEvent;
    private persistCompactionSidecar;
}
export declare class InMemoryTraceWriter implements TraceWriter {
    private seq;
    private sealed;
    private readonly _events;
    get events(): readonly TraceEvent[];
    write(event: TraceEventInput): Promise<void>;
    getTracePath(): string;
    seal(payload: SessionSealedPayload): Promise<void>;
    close(): Promise<void>;
    private readonly _inlineCompactionPayloads;
    getInlineCompactionPayload(seq: number): CompactionPayloadInput | undefined;
}