feat(server): add --mdns-domain flag to customize mDNS hostname (#11796)

packages/opencode/src/server/mdns.ts

@@ -7,17 +7,18 @@ export namespace MDNS {
   let bonjour: Bonjour | undefined
   let currentPort: number | undefined
 
-  export function publish(port: number) {
+  export function publish(port: number, domain?: string) {
     if (currentPort === port) return
     if (bonjour) unpublish()
 
     try {
+      const host = domain ?? "opencode.local"
       const name = `opencode-${port}`
       bonjour = new Bonjour()
       const service = bonjour.publish({
         name,
         type: "http",
-        host: "opencode.local",
+        host,
         port,
         txt: { path: "/" },
       })

packages/opencode/src/server/server.ts

@@ -563,7 +563,13 @@ export namespace Server {
     return result
   }
 
-  export function listen(opts: { port: number; hostname: string; mdns?: boolean; cors?: string[] }) {
+  export function listen(opts: {
+    port: number
+    hostname: string
+    mdns?: boolean
+    mdnsDomain?: string
+    cors?: string[]
+  }) {
     _corsWhitelist = opts.cors ?? []
 
     const args = {
@@ -591,7 +597,7 @@ export namespace Server {
       opts.hostname !== "localhost" &&
       opts.hostname !== "::1"
     if (shouldPublishMDNS) {
-      MDNS.publish(server.port!)
+      MDNS.publish(server.port!, opts.mdnsDomain)
     } else if (opts.mdns) {
       log.warn("mDNS enabled but hostname is loopback; skipping mDNS publish")
     }