});

it("truncates service name exceeding 63-byte DNS label limit", async () => {

const longHostname = "app-41627eae5842473f9e05f139ea307277-7f9477f4d6-lqqzf";

const longHostname = "app-41627eae5842473f9e05f139ea307277-7f9477f4d6-lqqzf-abcdefghi";

enableAdvertiserUnitMode(longHostname);

const destroy = vi.fn().mockResolvedValue(undefined);

// Both name and hostname must be within the 63-byte DNS label limit

expect(new TextEncoder().encode(serviceName).byteLength).toBeLessThanOrEqual(63);

expect(new TextEncoder().encode(hostname).byteLength).toBeLessThanOrEqual(63);

expect(hostname).not.toMatch(/-$/);

await started.stop();

});

const MAX_DNS_LABEL_BYTES = 63;

function truncateToDnsLabel(name: string): string {

function truncateToDnsLabel(name: string, fallback = "OpenClaw"): string {

const encoder = new TextEncoder();

const encoded = encoder.encode(name);

if (encoded.byteLength <= MAX_DNS_LABEL_BYTES) {

const truncated = encoded.slice(0, MAX_DNS_LABEL_BYTES);

const decoded = new TextDecoder("utf-8", { fatal: false }).decode(truncated);

// Strip any replacement character from incomplete multi-byte sequence at the end

return decoded.replace(/\uFFFD$/, "").trim() || "OpenClaw";

return (

decoded

.replace(/\uFFFD$/, "")

.replace(/-+$/, "")

.trim() || fallback

);

}

function safeServiceName(name: string) {

.replace(/\.local$/i, "")

.split(".")[0]

.trim() || "openclaw",

"openclaw",

);

const instanceName =

typeof opts.instanceName === "string" && opts.instanceName.trim()