/**
 * Release Asset Manifest — shared constants.
 *
 * @module release-assets/constants
 */
/** Current manifest body schema version. */
export declare const RELEASE_ASSET_MANIFEST_SCHEMA_VERSION: 2;
/** Public asset base path served on the project's own domain (proxy-owned). */
export declare const RELEASE_ASSET_BASE_PATH: "/_vf/assets";
/** Content types permitted for release assets. */
export declare const RELEASE_ASSET_CONTENT_TYPES: Readonly<{
    readonly js: "text/javascript";
    readonly css: "text/css";
}>;
/** File extensions supported by the immutable release asset endpoint. */
export type ReleaseAssetExtension = keyof typeof RELEASE_ASSET_CONTENT_TYPES;
/** MIME types accepted for immutable release asset uploads and responses. */
export type ReleaseAssetContentType = (typeof RELEASE_ASSET_CONTENT_TYPES)[ReleaseAssetExtension];
/** Allowlist of accepted content types (upstream + upload validation). */
export declare const RELEASE_ASSET_CONTENT_TYPE_ALLOWLIST: readonly ReleaseAssetContentType[];
/** Maximum size (bytes) for a single uploaded asset (10 MB). */
export declare const RELEASE_ASSET_MAX_SIZE_BYTES: number;
/** Maximum aggregate bytes retained while preparing one asset generation. */
export declare const RELEASE_ASSET_MAX_PENDING_BYTES: number;
/** Work and memory bounds enforced by every manifest producer and consumer. */
export declare const RELEASE_ASSET_MANIFEST_LIMITS: Readonly<{
    readonly identifierLength: 256;
    readonly builderVersionLength: 128;
    readonly manifestKeyLength: 2048;
    readonly styleProfileHashLength: 64;
    readonly cssPipelineIdentityLength: 2048;
    readonly coverageFailureLength: 4096;
    readonly moduleEntries: 20000;
    readonly dependencyEntries: 10000;
    readonly dependencySpecifiers: 40000;
    readonly cssEntries: 1;
    readonly routeEntries: 20000;
    readonly routeModules: 20000;
    readonly routeCssEntries: 1;
    readonly coverageFailures: 20000;
    readonly totalRouteReferences: 200000;
}>;
/** Immutable cache max-age in seconds (1 year). */
export declare const RELEASE_ASSET_IMMUTABLE_MAX_AGE_SECONDS = 31536000;
/** Query param that scopes fallback module URLs to an immutable release. */
export declare const RELEASE_MODULE_VERSION_PARAM: "vf_release";
/** Query param that scopes fallback module URLs to the Veryfront runtime build. */
export declare const RELEASE_MODULE_RUNTIME_VERSION_PARAM: "vf_runtime";
/** Bounded upload concurrency when posting assets during a build. */
export declare const RELEASE_ASSET_UPLOAD_CONCURRENCY = 8;
/** Env flag that enables HTML manifest consumption in production (default OFF). */
export declare const RELEASE_ASSET_MANIFEST_ENV_FLAG = "VERYFRONT_RELEASE_ASSET_MANIFEST";
/** Env flag that enables manifest dependency import-map rewrites (default OFF). */
export declare const RELEASE_ASSET_DEPENDENCY_IMPORT_MAP_ENV_FLAG = "VERYFRONT_RELEASE_ASSET_DEPENDENCY_IMPORT_MAP";
/** Env flag that enables dependency version pinning for bare npm imports (default OFF). */
export declare const DEPENDENCY_PINNING_ENV_FLAG = "VERYFRONT_DEPENDENCY_PINNING";
/** Map a 64-hex content hash + extension to its public asset URL. */
export declare function releaseAssetUrl(contentHash: string, extension: ReleaseAssetExtension): string;
/** Resolve the content type for an extension, or null if not allowed. */
export declare function contentTypeForExtension(extension: string): ReleaseAssetContentType | null;
/** True when the value is a valid allowlisted release asset content type. */
export declare function isAllowedReleaseAssetContentType(value: string | null | undefined): value is ReleaseAssetContentType;
/** Validate a content hash is exactly 64 lowercase hex characters. */
export declare function isValidContentHash(hash: string): boolean;
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