/**
 * Claude Max OAuth Provider
 *
 * Uses OAuth tokens from AuthStorage to authenticate with Claude Max plan.
 * The OAuth endpoint requires a specific system message to be present.
 */
import type { MastraModelConfig } from '@mastra/core/llm';
import type { LanguageModelMiddleware } from 'ai';
import { AuthStorage } from '../auth/storage.js';
/**
 * Get or create the shared AuthStorage instance
 */
export declare function getAuthStorage(): AuthStorage;
/**
 * Set a custom AuthStorage instance (useful for TUI integration)
 */
export declare function setAuthStorage(storage: AuthStorage | undefined): void;
/**
 * Middleware that injects the Claude Code identity system message
 * Required for Claude Max OAuth authentication
 */
export declare const claudeCodeMiddleware: LanguageModelMiddleware;
/**
 * Prompt caching middleware for Anthropic
 *
 * Adds cache breakpoints at strategic locations:
 * 1. Last system message (end of static instructions + dynamic memory)
 * 2. Most recent user/assistant message (conversation context)
 *
 * This allows Anthropic to cache:
 * - System prompts and instructions (rarely change)
 * - Conversation history up to the last message
 */
export declare const promptCacheMiddleware: LanguageModelMiddleware;
/**
 * Build a fetch function that handles Anthropic OAuth.
 * Preserves non-auth headers from init (critical for gateway auth header to survive
 * when used with the gateway). Strips `authorization` and `x-api-key`.
 */
export declare function buildAnthropicOAuthFetch(opts?: {
    authStorage?: AuthStorage;
}): typeof fetch;
/**
 * Creates an Anthropic model using Claude Max OAuth authentication
 * Uses OAuth tokens from AuthStorage (auto-refreshes when needed)
 */
export declare function opencodeClaudeMaxProvider(modelId?: string, options?: {
    headers?: Record<string, string>;
}): MastraModelConfig;
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