fix(httpapi): expose v2 catalog errors (#28498)

packages/opencode/test/cli/run/stream.transport.test.ts

@@ -98,12 +98,14 @@ function assistant(id: string) {
   } satisfies SdkEvent
 }
 
-function feed<T>() {
+const StreamClosed = undefined as never
+
+function feed<T, R = never>(returnValue: R = StreamClosed) {
   const list: T[] = []
   let done = false
   let wake: (() => void) | undefined
 
-  const wrapped = (async function* () {
+  const wrapped = (async function* (): AsyncGenerator<T, R, unknown> {
     while (!done || list.length > 0) {
       if (list.length === 0) {
         await new Promise<void>((resolve) => {
@@ -119,6 +121,7 @@ function feed<T>() {
 
       yield next
     }
+    return returnValue as R
   })()
 
   return {
@@ -166,10 +169,11 @@ function globalSse(stream: GlobalEventStream) {
 }
 
 function wrapGlobalStream(stream: EventStream): GlobalEventStream {
-  return (async function* () {
+  return (async function* (): GlobalEventStream {
     for await (const event of stream) {
       yield globalEvent(event)
     }
+    return StreamClosed
   })()
 }