fix for session stuck in "Working..."

packages/opencode/src/util/defer.ts

@@ -0,0 +1,12 @@
+export function defer<T extends () => void | Promise<void>>(
+  fn: T,
+): T extends () => Promise<void> ? { [Symbol.asyncDispose]: () => Promise<void> } : { [Symbol.dispose]: () => void } {
+  return {
+    [Symbol.dispose]() {
+      fn()
+    },
+    [Symbol.asyncDispose]() {
+      return Promise.resolve(fn())
+    },
+  } as any
+}