/**
 * Minimal STOMP 1.x frame codec used by the DingTalk stream-mode gateway.
 * Pure string logic (no sockets) so it can be unit-tested without a network:
 * DingTalk's stream gateway speaks STOMP over WebSocket with JSON bodies —
 * CONNECT / CONNECTED / SUBSCRIBE / MESSAGE / SEND / ERROR frames and bare
 * newline heartbeats.
 * @module dsh-connect/channels/dingtalk/stomp
 */
/** One decoded STOMP frame. */
export interface StompFrame {
    command: string;
    headers: Record<string, string>;
    body: string;
}
/**
 * Escape a header value per STOMP rules: backslash, newline, carriage
 * return and colon become \\, \n, \r, \c.
 */
export declare function escapeHeader(value: string): string;
/** Reverse of {@link escapeHeader}. */
export declare function unescapeHeader(value: string): string;
/** Serialize one frame (command, header block, blank line, body, NUL). */
export declare function encodeFrame(command: string, headers: Record<string, string>, body?: string): string;
/** Result of feeding a chunk into the incremental decoder. */
export interface StompDecodeResult {
    frames: StompFrame[];
    /** Unconsumed tail (partial frame) to carry into the next feed. */
    rest: string;
}
/**
 * Incrementally decode STOMP frames from a string buffer. Frames are
 * NUL-terminated; heartbeats (bare newlines) and other whitespace-only
 * segments are skipped. Returns the decoded frames plus the leftover tail.
 */
export declare function decodeFrames(buffer: string): StompDecodeResult;
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