/**
 * Lightweight loop guard: detects when the same tool is called
 * with the exact same arguments 3+ times in a row.
 */
/**
 * Check if this tool call is a repeat of the exact same call.
 * Returns a warning string to inject, or undefined if no loop.
 */
export declare function checkLoopGuard(tool: string, args: unknown): string | undefined;
export declare function resetLoopGuard(): void;
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