/**
 * NoOpCacheStrategy — fallback strategy for providers without cache
 * support (Mock, unknown providers, intentional opt-out).
 *
 * Returns the request unchanged; reports no metrics. The
 * `capabilities.enabled` flag is `false` so the CacheDecision subflow
 * could choose to skip emitting markers entirely (potential v2.7
 * optimization), though current Phase 4+5 always emit markers and
 * let the strategy decide what to do with them.
 *
 * Always-available default. Registered against the special wildcard
 * `'*'` so any unrecognized provider name falls back to NoOp.
 */
import type { CacheCapabilities, CacheMarker, CacheMetrics, CacheStrategy, CacheStrategyContext } from '../types.js';
import type { LLMRequest } from '../../adapters/types.js';
export declare class NoOpCacheStrategy implements CacheStrategy {
    /**
     * Wildcard provider name. The strategy registry treats this as the
     * fallback for any provider that doesn't have a specific strategy
     * registered.
     */
    readonly providerName = "*";
    readonly capabilities: CacheCapabilities;
    prepareRequest(req: LLMRequest, _candidates: readonly CacheMarker[], _ctx: CacheStrategyContext): Promise<{
        readonly request: LLMRequest;
        readonly markersApplied: readonly CacheMarker[];
    }>;
    extractMetrics(_usage: unknown): CacheMetrics | undefined;
}
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