type ViteUserConfig = import('vite').UserConfig;
type ViteUserConfigFn = import('vite').UserConfigFn;
type AstroUserConfig = import('./dist/@types/astro.js').AstroUserConfig;
type AstroInlineConfig = import('./dist/@types/astro.js').AstroInlineConfig;
type ImageServiceConfig = import('./dist/@types/astro.js').ImageServiceConfig;
type SharpImageServiceConfig = import('./dist/assets/services/sharp.js').SharpImageServiceConfig;
type EnvField = typeof import('./dist/env/config.js').envField;

/**
 * See the full Astro Configuration API Documentation
 * https://astro.build/config
 */
export function defineConfig(config: AstroUserConfig): AstroUserConfig;

/**
 * Use Astro to generate a fully resolved Vite config
 */
export function getViteConfig(
	config: ViteUserConfig,
	inlineAstroConfig?: AstroInlineConfig,
): ViteUserConfigFn;

/**
 * Return the configuration needed to use the Sharp-based image service
 */
export function sharpImageService(config?: SharpImageServiceConfig): ImageServiceConfig;

/**
 * @deprecated The Squoosh image service is deprecated and will be removed in Astro 5.x.
 * We suggest migrating to the default Sharp image service instead, as it is faster, more powerful and better maintained.
 *
 * Return the configuration needed to use the Squoosh-based image service
 * See: https://docs.astro.build/en/guides/images/#configure-squoosh
 */
export function squooshImageService(): ImageServiceConfig;

/**
 * Return the configuration needed to use the passthrough image service. This image services does not perform
 * any image transformations, and is mainly useful when your platform does not support other image services, or you are
 * not using Astro's built-in image processing.
 * See: https://docs.astro.build/en/guides/images/#configure-no-op-passthrough-service
 */
export function passthroughImageService(): ImageServiceConfig;

/**
 * Return a valid env field to use in this Astro config for `experimental.env.schema`.
 */
export const envField: EnvField;