import type { PortFrameAnyVersion, PortFrameSchemaVersion } from './portFrameModel.ts';
export declare const PortStreamProgressUnsupportedCode: "port.stream-progress-unsupported";
export declare function portStreamResumeNextSequence(frame: Extract<PortFrameAnyVersion, {
    frameKind: 'stream-resume';
}>): number;
export declare function portStreamTerminalProgress(version: PortFrameSchemaVersion, nextSequence: number): {
    nextSequence: number;
    lastSequence?: undefined;
} | {
    lastSequence: number;
    nextSequence?: undefined;
};
export declare function portStreamTerminalMatches(frame: Extract<PortFrameAnyVersion, {
    frameKind: 'stream-close' | 'stream-error';
}>, nextSequence: number): boolean;
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