export type GuardedToolCall = {
    name: string;
    arguments?: Record<string, unknown>;
};
export type DuplicateToolVerdict = 'ok' | 'block' | 'halt';
export declare const REPEAT_BLOCK_AT = 3;
export declare const REPEAT_HALT_AT = 6;
export declare function toolCallSignature(call: GuardedToolCall): string;
export declare class DuplicateToolCallGuard {
    private repeatStreak;
    private lastSignature?;
    private lastToolName?;
    private lastVerdict;
    check(call: GuardedToolCall): DuplicateToolVerdict;
    snapshot(): {
        toolName: string | undefined;
        signature: string | undefined;
        streak: number;
        verdict: DuplicateToolVerdict;
    };
}
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