/** Deterministic JSON identity for tool arguments. Object key insertion order
 * must not let a model evade the repeated-failure guard. */
export declare function stableStringify(value: unknown, seen?: WeakSet<object>): string;
/** Normalize volatile request ids/timestamps while preserving meaningful
 * classes such as HTTP 404 vs 503. */
export declare function normalizeErrorFingerprint(text: string): string;
export declare function failureSignature(toolName: string, input: unknown, resultPreview: string): string;
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