/**
 * SKAI Stream Parser Utilities
 */
import { SkaiMetadataToken, SkaiStreamLineParseResult, SkaiStreamParsingResult } from '../types/streaming';
/**
 * Custom errors for SKAI streaming
 */
export declare class SkaiStreamError extends Error {
    readonly tokenData?: unknown;
    constructor(message: string, tokenData?: unknown);
}
export declare class SkaiStreamTimeoutError extends Error {
    constructor(inactivityMs: number);
}
export declare class SkaiStreamValidationError extends Error {
    constructor(message: string);
}
/**
 * Parse a streaming line and determine its type
 */
export declare function parseStreamLine(line: string): SkaiStreamLineParseResult;
/**
 * Parse and validate metadata token content
 */
export declare function parseMetadataToken(tokenJson: string): SkaiMetadataToken[];
/**
 * Check if metadata token indicates an error condition
 */
export declare function checkForErrorToken(token: SkaiMetadataToken): string | null;
/**
 * Process content token and extract text
 */
export declare function processContentToken(tokenJson: string): string;
/**
 * Process a batch of streaming lines
 */
export declare function processStreamLines(lines: string[]): SkaiStreamParsingResult;
/**
 * Create a preview of content for logging
 */
export declare function createContentPreview(content: string, maxLength?: number): string;
/**
 * Check if stream has been inactive for too long
 */
export declare function checkStreamTimeout(lastActivityTime: number, currentTime?: number): void;
/**
 * Validate stream completion
 */
export declare function validateStreamCompletion(tokens: number, contentLength: number): void;