hello

examples/hello/hello.wit

@@ -3,8 +3,10 @@ package root:component;
 world root {
   import wasi:cli/stdin@0.2.6;
   import wasi:cli/stdout@0.2.6;
+  import wasi:io/streams@0.2.6;
 
-  export wasi:cli/run@0.2.0;
+  // export wasi:cli/run@0.2.0;
+  export hello: func();
 }
 
 package wasi:cli@0.2.6 {
@@ -13,10 +15,39 @@ package wasi:cli@0.2.6 {
 
     get-stdout: func() -> output-stream;
   }
-}
-
-package wasi:cli@0.2.0 {
-  interface run {
-    run: func() -> result;
+  interface stdin {
   }
 }
+
+// package wasi:cli@0.2.0 {
+//   interface run {
+//     run: func() -> result;
+//   }
+// }
+
+package wasi:io@0.2.6 {
+  interface poll {
+    resource pollable {
+      block: func();
+    }
+  }
+  interface error {
+    resource error;
+  }
+  interface streams {
+    use error.{error};
+    use poll.{pollable};
+
+    resource input-stream;
+
+    resource output-stream {
+      write: func(contents: list<u8>) -> result<_, stream-error>;
+      blocking-write-and-flush: func(contents: list<u8>) ->result<_,stream-error>;
+    }
+
+    variant stream-error {
+      last-operation-failed(error),
+      closed,
+    }
+  }
+}