/**
 * fingerprint.ts — Stable hash for a (tool, normalized args) pair.
 *
 * Used by the loop-guard to detect repeated identical tool calls. The
 * args are normalized (sorted keys, trimmed whitespace, lowercased
 * commands) so equivalent invocations hash the same way.
 *
 * Framework-agnostic — used by both the SDK MCP server and any Claude
 * Code hook scripts.
 */
/**
 * Compute a stable fingerprint for a (tool, args) pair. The hash is
 * over the canonical JSON of the normalized args (sorted keys, etc.) so
 * the same logical call always hashes the same way regardless of key
 * ordering or whitespace.
 */
export declare function fingerprint(tool: string, args: unknown, cwd?: string): string;
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