/**
 * Shared helpers for provider MCP adapters (issue #1137).
 */
import type { ProviderMcpAdapter, ResolvedMcpServers, ProviderMcpValidationContext } from './types.js';
import type { ProviderType } from '../../../shared/types/provider.js';
import { type AgentFailureCategory } from '../../../shared/types/agent-failure.js';
/**
 * Fail-fast when any resolved server uses a transport the provider does not
 * support. The error names the provider, server, transport, supported
 * transports, and the runtime.yaml source path (order.md:245-262).
 */
export declare function validateTransports(provider: ProviderType, servers: ResolvedMcpServers, context: ProviderMcpValidationContext | undefined): void;
/** Adapter used for providers whose capability set intentionally has no MCP transport. */
export declare function createUnsupportedMcpAdapter(provider: ProviderType): ProviderMcpAdapter;
/** No-op dispose helper for adapters that own no temp artifacts. */
export declare function noopDispose(): Promise<void>;
/** Build a dispose that runs `fn` exactly once. */
export declare function onceDispose(fn: () => Promise<void>): () => Promise<void>;
/**
 * Classify an MCP-related failure into a provider error category
 * (order.md:271,334). Shared by all provider adapters so the mapping is
 * consistent:
 *   - abort (AbortError / DOMException / signal aborted) → `external_abort`
 *   - timeout (message contains "timeout") → `part_timeout`
 *   - startup failure / tool failure / any other error → `provider_error`
 */
export declare function classifyMcpFailure(error: unknown): {
    category: AgentFailureCategory;
};
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