/** Entry module name inside the artifact (matches the CLI builder). */
export declare const SINGLE_FILE_ENTRY = "index.mjs";
/** A built program artifact + the metadata the version row records. */
export interface BuiltServerArtifact {
    tarball: Uint8Array;
    digest: string;
    size: number;
    entry: string;
    sdkVersion: string;
    lockfileDigest: null;
}
/**
 * Build a single-file program artifact from submitted source. Type-strips TS→ESM (no type-check;
 * imports preserved so `@boardwalk-labs/workflow` stays external), packs `index.mjs` into a deterministic
 * tar.gz, and content-addresses it. Pure (string in → bytes out) — no fs, no network.
 */
export declare function buildSingleFileArtifact(source: string, carryAssets?: readonly {
    name: string;
    data: Buffer;
}[]): BuiltServerArtifact;
/** Build a standards-compliant ustar archive holding the given regular files in order (deterministic:
 *  mtime/uid/gid zeroed). Readable by node-tar / system tar (the worker extractor) and our own reader.
 *  Exported so the multi-file package builder reuses the exact same packing. */
export declare function tarFiles(files: {
    name: string;
    data: Buffer;
}[]): Buffer;