/**
 * Minimum full Node.js version (major.minor.patch) the server supports. Kept in
 * lockstep with the `engines.node` field in package.json.
 *
 * A full version, not just a major, because the floor is dictated by a
 * transitive dependency: undici (via cheerio) declares `engines.node
 * >=22.19.0` and, at load time, destructures `markAsUncloneable` from
 * `node:worker_threads` — an export that only exists from Node 22.10.0 onward.
 * On an older 22.x (e.g. 22.0.0) undici crashes with a cryptic
 * `webidl.util.markAsUncloneable is not a function` deep in its cache module,
 * which is exactly the inscrutable-crash-instead-of-clear-message failure the
 * preflight shim (src/index.ts) exists to prevent (issue #455). A major-only
 * gate waved those runtimes straight into that crash, so the gate compares the
 * full version. Bump this in step with undici's `engines.node` floor.
 */
export declare const MINIMUM_NODE_VERSION = "22.19.0";
/**
 * Return a human-readable error message when `currentVersion` is older than
 * `minimumVersion`, otherwise `undefined`.
 *
 * Pure (no I/O) so the version gate is exhaustively unit-testable by passing
 * `process.versions.node`-shaped strings directly. A leading "v" is tolerated.
 * An unparseable version is treated as unsupported rather than waved through —
 * we would rather show the upgrade message than hand control to a runtime we
 * could not identify.
 *
 * Authored in syntax that parses on very old Node (no optional chaining, no
 * import attributes): this module sits in the shim's static import graph, so a
 * parse error here would reintroduce the very cryptic crash the shim exists to
 * prevent.
 */
export declare function nodeVersionError(currentVersion: string, minimumVersion: string): string | undefined;
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