/** Resolver: provider id -> extension entry path (undefined = none). */
export type ProviderExtensionResolver = (provider: string) => string | undefined;
/** Built-in default-mapped provider (custom pi provider behind an extension). */
export declare const DEFAULT_PROVIDER_EXTENSION_PROVIDER = "ollama-cloud";
/** Default extension entry for the built-in provider, under a given home. */
export declare function defaultOllamaCloudExtensionPath(home?: string): string;
/**
 * Extract the provider prefix of a `provider/model` model string. Builtin/bare
 * ids (no slash, leading slash, empty) carry no provider -> undefined.
 */
export declare function providerOfModel(model: string | undefined): string | undefined;
/** Options for {@link buildProviderExtensionResolver} (injectable for tests). */
export interface BuildProviderExtensionResolverOptions {
    /** Home dir for the built-in default path (default: os.homedir()). */
    home?: string;
    /** Path predicate (default: existsSync) — every candidate is guarded. */
    exists?: (path: string) => boolean;
}
/**
 * Build a provider-extension resolver: explicit config map entries first,
 * then the built-in `ollama-cloud` default. Every candidate path is guarded by
 * the exists predicate (never inject a dead path); unknown providers get
 * undefined (no `-e`). Results are memoized per provider id.
 */
export declare function buildProviderExtensionResolver(configMap: Record<string, string> | undefined, options?: BuildProviderExtensionResolverOptions): ProviderExtensionResolver;