/**
 * Build (or retrieve from cache) the native ttsc compiler host binary used by
 * the in-memory API compilation paths (`compileProjectInMemory`,
 * `transformProjectInMemory`).
 *
 * The host is the `cmd/ttsc` Go entrypoint compiled with `buildSourcePlugin`.
 * The cache key incorporates the ttsc package version and the full `go.mod`
 * contents so a toolchain upgrade automatically produces a fresh binary.
 *
 * @returns Absolute path to the compiled host executable.
 */
export declare function buildNativeCompiler(options: {
    cacheBaseDir: string;
    cacheDir?: string;
    packageRoot: string;
}): string;