/**
 * BedrockCacheStrategy — model-aware strategy for AWS Bedrock.
 *
 * Bedrock hosts multiple model families. Cache support varies:
 *   - Claude on Bedrock → identical mechanics to direct Anthropic
 *     (`cache_control: { type: 'ephemeral' }` markers, 4-marker
 *     limit). Strategy delegates to Anthropic-shaped behavior.
 *   - Llama / Mistral / Cohere on Bedrock → no cache support today
 *     (as of 2026-04-30). Strategy passes through, returns no metrics.
 *
 * Auto-detection: inspects `req.model` to decide. Claude model IDs
 * start with `'anthropic.claude'` on Bedrock (e.g.,
 * `anthropic.claude-3-5-sonnet-20240620-v1:0`).
 *
 * Auto-registers under provider name `'bedrock'`.
 *
 * Per the Phase 1 review (Reviewer 6 — Provider SDK expert): for
 * non-Claude Bedrock models the strategy reports `enabled: false` in
 * its capabilities so the CacheDecision subflow can short-circuit
 * marker emission (potential v2.7 optimization). Today markers still
 * emit and we drop them silently in prepareRequest.
 */
import type { CacheCapabilities, CacheMarker, CacheMetrics, CacheStrategy, CacheStrategyContext } from '../types.js';
import type { LLMRequest } from '../../adapters/types.js';
export declare class BedrockCacheStrategy implements CacheStrategy {
    readonly providerName = "bedrock";
    readonly capabilities: CacheCapabilities;
    prepareRequest(req: LLMRequest, candidates: readonly CacheMarker[], ctx: CacheStrategyContext): Promise<{
        readonly request: LLMRequest;
        readonly markersApplied: readonly CacheMarker[];
    }>;
    extractMetrics(usage: unknown): CacheMetrics | undefined;
}