fix: add OpenCode models domain (#3849)

* fix: add OpenCode models domain

* fix: remove computed custom domain field

sst.config.ts

@@ -18,13 +18,7 @@ export default $config({
 
     const worker = new sst.cloudflare.Worker("Server", {
       url: true,
-      domain:
-        $app.stage === "dev"
-          ? {
-              name: "models.dev",
-              aliases: ["models.opencode.ai"],
-            }
-          : undefined,
+      domain: $app.stage === "dev" ? "models.dev" : undefined,
       link: [
         new sst.Secret("PosthogToken"),
         new sst.Secret("LakeUrl"),
@@ -41,6 +35,23 @@ export default $config({
       },
     });
 
+    if ($app.stage === "dev") {
+      const zone = cloudflare.getZoneOutput({
+        filter: {
+          account: { id: process.env.CLOUDFLARE_DEFAULT_ACCOUNT_ID! },
+          name: "opencode.ai",
+        },
+      });
+
+      new cloudflare.WorkersCustomDomain("OpenCodeDomain", {
+        accountId: process.env.CLOUDFLARE_DEFAULT_ACCOUNT_ID!,
+        environment: "production",
+        hostname: "models.opencode.ai",
+        service: worker.nodes.worker.scriptName,
+        zoneId: zone.zoneId,
+      });
+    }
+
     return {
       url: worker.url,
     };