import type { EcoBuildPlugin } from '../contracts/build-types.js';
import type { BuildOptions } from '../contracts/build-contracts.js';
/**
 * Returns the installed `@ecopages/core` package version for cache invalidation.
 */
export declare function getCorePackageVersion(): string;
/** Stable fingerprint for JSX options used in build and disk cache keys. */
export declare function createJsxCacheKey(jsx: BuildOptions['jsx']): string;
/** Stable fingerprint for ordered build plugins. */
export declare function createPluginCacheKey(plugins?: EcoBuildPlugin[]): string;
/** Stable fingerprint for ordered source transforms. */
export declare function createSourceTransformCacheKey(sourceTransforms: BuildOptions['sourceTransforms']): string;
/**
 * Stable fingerprint of a function body for cache and request identity keys.
 *
 * @remarks
 * Hashes `fn.toString()`. Suitable for in-process and persisted keys that must
 * agree within one install; not stable across minifiers or renames.
 */
export declare function hashFunctionIdentity(fn: (...args: never[]) => unknown): string;
/** @deprecated Use {@link hashFunctionIdentity}. */
export declare const hashPluginSetup: typeof hashFunctionIdentity;