/**
 * Mutable per-session runtime: the transport, the output store, the ordered
 * input lane, timers, and the single finalization promise.
 *
 * Sessions share no locks, queues, cursors, deadlines, or finalization state, so
 * a failure in one session cannot affect another.
 */
import type { BoundedArtifactWriter } from "./artifact-writer.js";
import type { InteractiveSessionConfig } from "./config.js";
import type { OutputStore } from "./output-store.js";
import type { InteractiveEngagementState } from "../safety/engagement-policy.js";
import { AsyncMutex, FinalizeOnce, Notifier, OrderedInputQueue, TimerSet, type Clock } from "./runtime.js";
import type { SessionTransport } from "./transport.js";
import type { CloseResult, InteractiveSessionRecord, TerminationReason } from "./types.js";
export interface SessionRuntimeInit {
    readonly record: InteractiveSessionRecord;
    readonly transport: SessionTransport;
    readonly output: OutputStore;
    readonly artifact: BoundedArtifactWriter;
    readonly config: InteractiveSessionConfig;
    readonly clock: Clock;
    readonly idleTimeoutMs: number | undefined;
    readonly lifetimeTimeoutMs: number | undefined;
    readonly engagementState?: InteractiveEngagementState | undefined;
    readonly onTimeout: (reason: "idle-timeout" | "lifetime-timeout") => void;
}
export declare class SessionRuntime {
    readonly record: InteractiveSessionRecord;
    readonly transport: SessionTransport;
    readonly output: OutputStore;
    readonly artifact: BoundedArtifactWriter;
    readonly config: InteractiveSessionConfig;
    readonly clock: Clock;
    readonly input: OrderedInputQueue;
    readonly mutation: AsyncMutex;
    readonly policy: AsyncMutex;
    readonly finalize: FinalizeOnce<CloseResult>;
    readonly timers: TimerSet;
    readonly exitSignal: Notifier;
    engagementState: InteractiveEngagementState;
    /** Set once a terminal transition is chosen so late observations only enrich. */
    processExited: boolean;
    exitObserved: TerminationReason | undefined;
    disposed: boolean;
    private readonly unsubscribes;
    private readonly idleTimeoutMs;
    constructor(init: SessionRuntimeInit);
    track(unsubscribe: () => void): void;
    /** Accepted input and observed output both count as activity. */
    touch(): void;
    syncCursors(): void;
    releaseListeners(): void;
}