import type { Logger } from './types.js';
/** The three launch fields the channel argv is rebuilt from. */
export interface WebchatChannelBinding {
    key: string;
    gatewayUrl: string;
    serverPath: string;
}
export interface WebchatChannelEntry extends WebchatChannelBinding {
    boundAt: string;
}
export declare class WebchatChannelStore {
    private readonly bySessionId;
    private readonly filePath;
    private readonly logger;
    constructor(filePath: string, logger: Logger);
    /** Read the persisted file into the in-memory map. Boot-resilient: any
     *  failure (missing file, malformed JSON, permission denied) is logged and
     *  the store starts empty. Never throws. */
    loadFromDisk(): void;
    get(sessionId: string): WebchatChannelEntry | undefined;
    /** Write-through `binding` for `sessionId`; refreshes boundAt each call. */
    set(sessionId: string, binding: WebchatChannelBinding): WebchatChannelEntry;
    /** Remove the entry for `sessionId` if present. Returns true when removed. */
    remove(sessionId: string): boolean;
    /** Current in-memory snapshot — diagnostic only. */
    size(): number;
    private persistAtomic;
}
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