/**
 * Shared types for the asciicast v2 format.
 * Recorder and player both import these so the on-disk schema stays in sync.
 */
export type CastEventKind = 'o' | 'i';
export type CastEvent = [time: number, kind: CastEventKind, data: string];
export interface CastHeader {
    version: 2;
    width: number;
    height: number;
    timestamp?: number;
    duration?: number;
    title?: string;
    env?: Record<string, string>;
}
/**
 * Escape a JSON string for safe interpolation inside an HTML <script> block.
 * JSON.stringify alone does NOT escape `</script>`, `<!--`, or U+2028/U+2029,
 * so attacker-controlled bytes inside event data could break out of the
 * script element and execute. The .html player is designed for sharing in
 * PR comments, so this matters.
 */
export declare function escapeJsonForScript(json: string): string;
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