/**
 * Browser/tab state for the long-lived MCP server process. Owns the single CDP
 * connection plus all attached page tabs and the active-tab pointer.
 *
 * Adapted from the `chrome-use` skill (skills/chrome-use/scripts/lib/session.ts),
 * with the cross-invocation /tmp active-file removed: the MCP server is a
 * long-lived process, so the active-tab pointer lives in memory here.
 */
import type { CdpClient, TabSession } from './types.js';
export declare class SessionManager {
    readonly cdp: CdpClient;
    readonly tabs: Map<string, TabSession>;
    activeTargetId: string | null;
    /** Sessions attached this connection, detached on dispose() to keep Chrome clean. */
    private readonly attached;
    /** Monotonic counter for stable tab ids — a target keeps its id for the whole
     * connection so a cached `tN` never silently points at a different tab. */
    private tabSeq;
    constructor(cdp: CdpClient);
    private pages;
    private attach;
    /** Detach every session this connection created (best-effort). */
    dispose(): Promise<void>;
    syncTabs(): Promise<void>;
    getActiveTab(): Promise<TabSession>;
    getTab(idOrIndex: string): Promise<TabSession | undefined>;
    setActive(targetId: string): void;
    newTab(url?: string): Promise<TabSession>;
    closeTab(targetId: string): Promise<void>;
}
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