import type { StandardSchemaV1 } from './standard-schema.ts';
/** A function that validates and returns a specific type. */
type BivariantCallback<Args extends any[], Return> = {
    bivarianceHack(...args: Args): Return;
}['bivarianceHack'];
/** A function that validates and returns a specific type. */
export type ModuleExportValidator<Input = Record<string, unknown>, Output = Input> = BivariantCallback<[value: Input], Output>;
/**
 * Directory-level schema configuration.
 *
 * - A Standard Schema validates the *module object* (e.g. `z.object({ frontmatter: ... })`).
 * - A schema map validates *individual exports* (e.g. `{ frontmatter: z.object(...) }`).
 * - Both forms can also be provided per extension via `{ mdx: ..., ts: ... }`.
 */
export type DirectorySchemaOption = StandardSchemaV1 | Record<string, StandardSchemaV1 | ModuleExportValidator>;
export type DirectorySchema = DirectorySchemaOption | Partial<Record<string, DirectorySchemaOption>>;
export declare function isStandardSchema(value: unknown): value is StandardSchemaV1;
export declare function resolveDirectorySchemaOption(schema: DirectorySchema | undefined, extension: string | undefined): DirectorySchemaOption | undefined;
export declare function validateExportValueWithExportSchemaMap(schemaMap: Record<string, StandardSchemaV1 | ModuleExportValidator<any, any>>, name: string, value: unknown, filePath: string): any;
export declare function applyModuleSchemaToModule(schema: StandardSchemaV1, moduleValue: any, filePath: string): any;
export {};