import type { Api, Model, ProviderSessionState } from "../types.js";
/** Root key for Anthropic's per-session provider state. */
export declare const ANTHROPIC_PROVIDER_SESSION_STATE_KEY = "anthropic-messages";
/** Normalize an Anthropic base URL to its origin path without `/v1`. */
export declare function normalizeAnthropicBaseUrl(baseUrl?: string): string | undefined;
/** Resolve the endpoint for a first-party Anthropic model without loading its provider implementation. */
export declare function resolveDirectAnthropicBaseUrl(model: Model<Api>): string;
/** Build the endpoint-and-model-scoped Anthropic session-state key. */
export declare function anthropicProviderSessionStateKey(baseUrl: string, modelId: string): string;
/** Re-arm fast mode across materialized Anthropic session-state entries. */
export declare function clearAnthropicFastModeFallback(providerSessionState: Map<string, ProviderSessionState> | undefined): void;
/** Inspect the direct model's fast-mode fallback without materializing state. */
export declare function isAnthropicFastModeFallbackDisabled(providerSessionState: Map<string, ProviderSessionState> | undefined, model: Model<Api>): boolean;