import { type DamagedLine, type SequenceGap } from './event-log.js';
import type { SessionEvent, SessionEventKind } from './types.js';
/** What the on-disk stream is known to have lost or mangled. Never optimistic. */
export interface StreamIntegrity {
    healthy: boolean;
    damaged: DamagedLine[];
    gaps: SequenceGap[];
    quarantined: boolean;
    quarantineError?: string;
    /** Appends that failed outright; their events survive in memory only. */
    writeFailures: number;
    lastWriteError?: string;
    /** Appends that had to close off a dangling partial record first. */
    boundaryRepairs: number;
    rotationFailed: boolean;
}
/** Bounded, typed event stream shared by CLI frontends and future ACP/Toad facades. */
export declare class SessionEvents {
    private readonly path;
    private seq;
    private readonly events;
    private readonly listeners;
    private readonly integrityState;
    private readonly rotatedPath;
    constructor(path: string);
    emit(kind: SessionEventKind, fields?: Omit<SessionEvent, 'version' | 'seq' | 'at' | 'kind'>): SessionEvent;
    since(seq: number): SessionEvent[];
    subscribe(listener: (event: SessionEvent) => void): () => void;
    /** Snapshot of what is known to be wrong with the persisted stream. */
    integrity(): StreamIntegrity;
    private persist;
    private restore;
    private describeLoss;
    private rotateIfNeeded;
}