/**
 * Extract a bounded message from any thrown value without ever throwing.
 * Error-reporting sites run inside catch blocks and third-party emitters,
 * where a poisoned `message` getter or a throwing `toString()` would replace
 * the real failure with its own — and an unbounded message retained as a
 * dedup key is a memory footgun. (`uwc-bridge-child` keeps a local copy —
 * that package stays dependency-free; keep the two in sync.)
 */
export declare function safeErrorMessage(error: unknown): string;
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