/**
 * Checks whether an error is an ERR_STREAM_DESTROYED error, which is a
 * non-fatal condition that occurs when code writes to a stream after it
 * has been closed (e.g., client disconnect, cancelled LLM stream, LSP
 * shutdown, killed subprocess).
 *
 * Walks the `.cause` chain up to a depth limit.
 */
export declare function isStreamDestroyedError(err: unknown, depth?: number): boolean;
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