/**
 * ServerResolver — Chain of Responsibility for MCP Server Detection
 *
 * Resolves an unknown input into a low-level McpServerLike instance
 * using a chain of type-narrowing strategies. Each step either resolves
 * the server or passes to the next resolver.
 *
 * Pure-function module: no state, no side effects.
 */
/** Minimal duck-typed interface for the low-level MCP Server */
export interface McpServerLike {
    setRequestHandler: (...args: never[]) => void;
}
/**
 * Resolve an unknown server input into a McpServerLike instance.
 *
 * Walks the resolver chain until one succeeds, or throws if none match.
 *
 * @param server - Server or McpServer instance (duck-typed)
 * @returns The resolved low-level Server
 * @throws Error if the input is not a valid server
 */
export declare function resolveServer(server: unknown): McpServerLike;
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