export interface PromptBoundary {
    instruction: string;
    wrap(content: string): string;
}
export declare function protectPrompt(systemPrompt: string, untrustedContent: string): {
    systemPrompt: string;
    userPrompt: string;
};
/**
 * Create a per-request boundary for repository-derived prompt content.
 * The random token makes closing the boundary from inside hostile content
 * impractical; callers keep all analysis instructions outside the block.
 * change: harden-llm-prompt-injection-boundary
 */
export declare function createPromptBoundary(): PromptBoundary;
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