diff --git a/veilid-core/src/attachment_manager.rs b/veilid-core/src/attachment_manager.rs
index 60f3448a..3357500c 100644
--- a/veilid-core/src/attachment_manager.rs
+++ b/veilid-core/src/attachment_manager.rs
@@ -357,38 +357,38 @@ impl AttachmentManager {
         attachment_machine.state()
     }
 
-    pub async fn wait_for_state(&self, state: AttachmentState, timeout_ms: Option<u32>) -> bool {
-        let start_time = intf::get_timestamp();
+    // pub async fn wait_for_state(&self, state: AttachmentState, timeout_ms: Option<u32>) -> bool {
+    //     let start_time = intf::get_timestamp();
 
-        loop {
-            let (current_state, eventual) = self
-                .inner
-                .lock()
-                .attachment_machine
-                .state_eventual_instance();
-            if current_state == state {
-                break;
-            }
-            if let Some(timeout_ms) = timeout_ms {
-                let timeout_time = start_time + (timeout_ms as u64 * 1000);
-                let cur_time = intf::get_timestamp();
-                if timeout_time > cur_time {
-                    let timeout_dur_ms = ((timeout_time - cur_time) / 1000) as u32;
+    //     loop {
+    //         let (current_state, eventual) = self
+    //             .inner
+    //             .lock()
+    //             .attachment_machine
+    //             .state_eventual_instance();
+    //         if current_state == state {
+    //             break;
+    //         }
+    //         if let Some(timeout_ms) = timeout_ms {
+    //             let timeout_time = start_time + (timeout_ms as u64 * 1000);
+    //             let cur_time = intf::get_timestamp();
+    //             if timeout_time > cur_time {
+    //                 let timeout_dur_ms = ((timeout_time - cur_time) / 1000) as u32;
 
-                    if match intf::timeout(timeout_dur_ms, eventual).await {
-                        Ok(v) => v,
-                        Err(_) => return false,
-                    } == state
-                    {
-                        return true;
-                    }
-                } else {
-                    return false;
-                }
-            } else if eventual.await == state {
-                break;
-            }
-        }
-        true
-    }
+    //                 if match intf::timeout(timeout_dur_ms, eventual).await {
+    //                     Ok(v) => v,
+    //                     Err(_) => return false,
+    //                 } == state
+    //                 {
+    //                     return true;
+    //                 }
+    //             } else {
+    //                 return false;
+    //             }
+    //         } else if eventual.await == state {
+    //             break;
+    //         }
+    //     }
+    //     true
+    // }
 }
diff --git a/veilid-core/src/core_context.rs b/veilid-core/src/core_context.rs
index f088cf5f..f045c456 100644
--- a/veilid-core/src/core_context.rs
+++ b/veilid-core/src/core_context.rs
@@ -21,6 +21,7 @@ pub struct VeilidCoreContext {
     pub block_store: BlockStore,
     pub crypto: Crypto,
     pub attachment_manager: AttachmentManager,
+    pub update_callback: UpdateCallback,
 }
 
 impl VeilidCoreContext {
@@ -128,12 +129,13 @@ impl VeilidCoreContext {
 
         // Set up attachment manager
         trace!("VeilidCoreContext::new init attachment manager");
+        let update_callback_move = update_callback.clone();
         let attachment_manager =
             AttachmentManager::new(config.clone(), table_store.clone(), crypto.clone());
         if let Err(e) = attachment_manager
             .init(Arc::new(
                 move |_old_state: AttachmentState, new_state: AttachmentState| {
-                    update_callback(VeilidUpdate::Attachment { state: new_state })
+                    update_callback_move(VeilidUpdate::Attachment { state: new_state })
                 },
             ))
             .await
@@ -154,6 +156,7 @@ impl VeilidCoreContext {
             block_store,
             crypto,
             attachment_manager,
+            update_callback,
         })
     }
 
@@ -167,6 +170,9 @@ impl VeilidCoreContext {
         self.protected_store.terminate().await;
         self.config.terminate().await;
 
+        // send final shutdown update
+        (self.update_callback)(VeilidUpdate::Shutdown).await;
+
         trace!("VeilidCoreContext::shutdown complete");
         ApiLogger::terminate();
     }
diff --git a/veilid-core/src/tests/common/test_veilid_core.rs b/veilid-core/src/tests/common/test_veilid_core.rs
index 5847c32a..49d97fa0 100644
--- a/veilid-core/src/tests/common/test_veilid_core.rs
+++ b/veilid-core/src/tests/common/test_veilid_core.rs
@@ -22,14 +22,7 @@ pub async fn test_attach_detach() {
     api.attach().await.unwrap();
     intf::sleep(5000).await;
     api.detach().await.unwrap();
-    api.wait_for_update(
-        VeilidUpdate::Attachment {
-            state: AttachmentState::Detached,
-        },
-        None,
-    )
-    .await
-    .unwrap();
+    intf::sleep(2000).await;
     api.shutdown().await;
 
     info!("--- test auto detach ---");
diff --git a/veilid-core/src/veilid_api/mod.rs b/veilid-core/src/veilid_api/mod.rs
index 29df412d..6092bb1f 100644
--- a/veilid-core/src/veilid_api/mod.rs
+++ b/veilid-core/src/veilid_api/mod.rs
@@ -168,6 +168,7 @@ pub enum VeilidUpdate {
     Attachment {
         state: AttachmentState,
     },
+    Shutdown,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -1216,28 +1217,6 @@ impl VeilidAPI {
         Ok(())
     }
 
-    // wait for a matching update
-    pub async fn wait_for_update(
-        &self,
-        update: VeilidUpdate,
-        timeout_ms: Option<u32>,
-    ) -> Result<(), VeilidAPIError> {
-        match update {
-            VeilidUpdate::Log {
-                log_level: _,
-                message: _,
-            } => {
-                // No point in waiting for a log
-            }
-            VeilidUpdate::Attachment { state } => {
-                self.attachment_manager()?
-                    .wait_for_state(state, timeout_ms)
-                    .await;
-            }
-        }
-        Ok(())
-    }
-
     // Change api logging level if it is enabled
     pub async fn change_api_log_level(&self, log_level: VeilidConfigLogLevel) {
         ApiLogger::change_log_level(log_level.to_level_filter());
diff --git a/veilid-flutter/example/lib/main.dart b/veilid-flutter/example/lib/main.dart
index d9ec24ac..d3b874fe 100644
--- a/veilid-flutter/example/lib/main.dart
+++ b/veilid-flutter/example/lib/main.dart
@@ -1,13 +1,54 @@
 import 'dart:async';
 
+import 'package:logger/logger.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:veilid/veilid.dart';
+import 'package:logger_flutter_viewer/logger_flutter_viewer.dart';
 
+// Logger
+var stacklog = Logger(
+    printer: PrettyPrinter(
+        methodCount: 10,
+        errorMethodCount: 10,
+        printTime: true,
+        colors: true,
+        printEmojis: true),
+    output: ScreenOutput());
+var log = Logger(
+    printer: PrettyPrinter(
+      methodCount: 0,
+      errorMethodCount: 1,
+      printTime: true,
+      colors: true,
+      printEmojis: true,
+      noBoxingByDefault: true,
+    ),
+    output: ScreenOutput());
+var barelog = Logger(
+    printer: PrettyPrinter(
+      methodCount: 0,
+      errorMethodCount: 0,
+      printTime: false,
+      colors: true,
+      printEmojis: true,
+      noBoxingByDefault: true,
+    ),
+    output: ScreenOutput());
+
+class ScreenOutput extends LogOutput {
+  @override
+  void output(OutputEvent event) {
+    LogConsole.output(event);
+  }
+}
+
+// Entrypoint
 void main() {
   runApp(const MyApp());
 }
 
+// Main App
 class MyApp extends StatefulWidget {
   const MyApp({Key? key}) : super(key: key);
 
@@ -34,6 +75,10 @@ class _MyAppState extends State<MyApp> {
     } on PlatformException {
       veilidVersion = 'Failed to get veilid version.';
     }
+    log.e("Error test");
+    log.w("Warning test");
+    stacklog.i("Info test with stacklog");
+    barelog.d("debug bare-log test");
 
     // If the widget was removed from the tree while the asynchronous platform
     // message was in flight, we want to discard the reply rather than calling
@@ -50,11 +95,9 @@ class _MyAppState extends State<MyApp> {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
-          title: const Text('Veilid Plugin Example App'),
-        ),
-        body: Center(
-          child: Text('Veilid version: $_veilidVersion\n'),
+          title: Text('Veilid Plugin Version $_veilidVersion'),
         ),
+        body: LogConsole(dark: Theme.of(context).brightness == Brightness.dark),
       ),
     );
   }
diff --git a/veilid-flutter/example/pubspec.lock b/veilid-flutter/example/pubspec.lock
index 420d3cc6..7a96f434 100644
--- a/veilid-flutter/example/pubspec.lock
+++ b/veilid-flutter/example/pubspec.lock
@@ -107,6 +107,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
+  logger:
+    dependency: "direct main"
+    description:
+      name: logger
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  logger_flutter_viewer:
+    dependency: "direct main"
+    description:
+      name: logger_flutter_viewer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.0"
   matcher:
     dependency: transitive
     description:
@@ -135,6 +149,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+  sensors_plus:
+    dependency: transitive
+    description:
+      name: sensors_plus
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1"
+  sensors_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: sensors_plus_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  sensors_plus_web:
+    dependency: transitive
+    description:
+      name: sensors_plus_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   sky_engine:
     dependency: transitive
     description: flutter
diff --git a/veilid-flutter/example/pubspec.yaml b/veilid-flutter/example/pubspec.yaml
index ea8fb3ab..b55968f0 100644
--- a/veilid-flutter/example/pubspec.yaml
+++ b/veilid-flutter/example/pubspec.yaml
@@ -33,6 +33,8 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
+  logger: ^1.1.0
+  logger_flutter_viewer: ^0.8.0
 
 dev_dependencies:
   flutter_test:
diff --git a/veilid-flutter/rust/src/dart_ffi.rs b/veilid-flutter/rust/src/dart_ffi.rs
index b1e21b26..f4fa3412 100644
--- a/veilid-flutter/rust/src/dart_ffi.rs
+++ b/veilid-flutter/rust/src/dart_ffi.rs
@@ -119,7 +119,14 @@ pub extern "C" fn startup_veilid_core(port: i64, config: FfiStr) {
             move |update: veilid_core::VeilidUpdate| -> veilid_core::SystemPinBoxFuture<()> {
                 let sink = sink.clone();
                 Box::pin(async move {
-                    sink.item_json(update);
+                    match update {
+                        veilid_core::VeilidUpdate::Shutdown => {
+                            sink.close();
+                        }
+                        _ => {
+                            sink.item_json(update);
+                        }
+                    }
                 })
             },
         );
@@ -159,6 +166,16 @@ pub extern "C" fn shutdown_veilid_core(port: i64) {
     });
 }
 
+#[no_mangle]
+pub extern "C" fn debug(port: i64, command: FfiStr) {
+    let command = command.into_opt_string().unwrap_or_default();
+    DartIsolateWrapper::new(port).spawn_result(async move {
+        let veilid_api = get_veilid_api().await?;
+        let out = veilid_api.debug(command).await?;
+        APIResult::Ok(out)
+    });
+}
+
 #[no_mangle]
 pub extern "C" fn veilid_version_string() -> *mut c_char {
     veilid_core::veilid_version_string().into_ffi_value()
diff --git a/veilid-flutter/rust/src/dart_isolate_wrapper.rs b/veilid-flutter/rust/src/dart_isolate_wrapper.rs
index 365b9b5c..3d3c1ec5 100644
--- a/veilid-flutter/rust/src/dart_isolate_wrapper.rs
+++ b/veilid-flutter/rust/src/dart_isolate_wrapper.rs
@@ -13,12 +13,12 @@ pub struct DartIsolateWrapper {
 }
 
 const MESSAGE_OK: i32 = 0;
-const MESSAGE_ERR: i32 = 1;
+//const MESSAGE_ERR: i32 = 1;
 const MESSAGE_OK_JSON: i32 = 2;
 const MESSAGE_ERR_JSON: i32 = 3;
-const MESSAGE_STREAM_ITEM: i32 = 4;
+//const MESSAGE_STREAM_ITEM: i32 = 4;
 const MESSAGE_STREAM_ITEM_JSON: i32 = 5;
-const MESSAGE_STREAM_ABORT: i32 = 6;
+//const MESSAGE_STREAM_ABORT: i32 = 6;
 const MESSAGE_STREAM_ABORT_JSON: i32 = 7;
 const MESSAGE_STREAM_CLOSE: i32 = 8;
 
@@ -29,6 +29,17 @@ impl DartIsolateWrapper {
         }
     }
 
+    pub fn spawn_result<F, T, E>(self, future: F)
+    where
+        F: Future<Output = Result<T, E>> + Send + 'static,
+        T: IntoDart,
+        E: Serialize,
+    {
+        async_std::task::spawn(async move {
+            self.result(future.await);
+        });
+    }
+
     pub fn spawn_result_json<F, T, E>(self, future: F)
     where
         F: Future<Output = Result<T, E>> + Send + 'static,
@@ -40,10 +51,10 @@ impl DartIsolateWrapper {
         });
     }
 
-    pub fn result<T: IntoDart, E: IntoDart>(&self, result: Result<T, E>) -> bool {
+    pub fn result<T: IntoDart, E: Serialize>(&self, result: Result<T, E>) -> bool {
         match result {
             Ok(v) => self.ok(v),
-            Err(e) => self.err(e),
+            Err(e) => self.err_json(e),
         }
     }
     pub fn result_json<T: Serialize, E: Serialize>(&self, result: Result<T, E>) -> bool {
@@ -64,10 +75,10 @@ impl DartIsolateWrapper {
         ])
     }
 
-    pub fn err<E: IntoDart>(&self, error: E) -> bool {
-        self.isolate
-            .post(vec![MESSAGE_ERR.into_dart(), error.into_dart()])
-    }
+    // pub fn err<E: IntoDart>(&self, error: E) -> bool {
+    //     self.isolate
+    //         .post(vec![MESSAGE_ERR.into_dart(), error.into_dart()])
+    // }
 
     pub fn err_json<E: Serialize>(&self, error: E) -> bool {
         self.isolate.post(vec![
@@ -89,14 +100,14 @@ impl DartIsolateStream {
         }
     }
 
-    pub fn item<T: IntoDart>(&self, value: T) -> bool {
-        let isolate = self.isolate.lock();
-        if let Some(isolate) = &*isolate {
-            isolate.post(vec![MESSAGE_STREAM_ITEM.into_dart(), value.into_dart()])
-        } else {
-            false
-        }
-    }
+    // pub fn item<T: IntoDart>(&self, value: T) -> bool {
+    //     let isolate = self.isolate.lock();
+    //     if let Some(isolate) = &*isolate {
+    //         isolate.post(vec![MESSAGE_STREAM_ITEM.into_dart(), value.into_dart()])
+    //     } else {
+    //         false
+    //     }
+    // }
 
     pub fn item_json<T: Serialize>(&self, value: T) -> bool {
         let isolate = self.isolate.lock();
@@ -110,14 +121,14 @@ impl DartIsolateStream {
         }
     }
 
-    pub fn abort<E: IntoDart>(self, error: E) -> bool {
-        let mut isolate = self.isolate.lock();
-        if let Some(isolate) = isolate.take() {
-            isolate.post(vec![MESSAGE_STREAM_ABORT.into_dart(), error.into_dart()])
-        } else {
-            false
-        }
-    }
+    // pub fn abort<E: IntoDart>(self, error: E) -> bool {
+    //     let mut isolate = self.isolate.lock();
+    //     if let Some(isolate) = isolate.take() {
+    //         isolate.post(vec![MESSAGE_STREAM_ABORT.into_dart(), error.into_dart()])
+    //     } else {
+    //         false
+    //     }
+    // }
 
     pub fn abort_json<E: Serialize>(self, error: E) -> bool {
         let mut isolate = self.isolate.lock();
diff --git a/veilid-server/proto/veilid-client.capnp b/veilid-server/proto/veilid-client.capnp
index a8a1b93f..2e38175e 100644
--- a/veilid-server/proto/veilid-client.capnp
+++ b/veilid-server/proto/veilid-client.capnp
@@ -18,7 +18,7 @@ struct Attachment {
 struct VeilidUpdate {
     union {
         attachment      @0 :Attachment;
-        dummy           @1 :Void;
+        shutdown        @1 :Void;
     } 
 }
 
diff --git a/veilid-server/src/client_api.rs b/veilid-server/src/client_api.rs
index 3c7cf607..364ee24a 100644
--- a/veilid-server/src/client_api.rs
+++ b/veilid-server/src/client_api.rs
@@ -33,7 +33,7 @@ fn convert_attachment_state(state: &veilid_core::AttachmentState) -> AttachmentS
 
 fn convert_update(
     update: &veilid_core::VeilidUpdate,
-    rpc_update: crate::veilid_client_capnp::veilid_update::Builder,
+    mut rpc_update: crate::veilid_client_capnp::veilid_update::Builder,
 ) {
     match update {
         veilid_core::VeilidUpdate::Log {
@@ -46,6 +46,9 @@ fn convert_update(
             let mut att = rpc_update.init_attachment();
             att.set_state(convert_attachment_state(state));
         }
+        veilid_core::VeilidUpdate::Shutdown => {
+            rpc_update.set_shutdown(());
+        }
     }
 }
 
diff --git a/veilid-wasm/src/js_veilid_core.rs b/veilid-wasm/src/js_veilid_core.rs
index 53475710..e4eb7922 100644
--- a/veilid-wasm/src/js_veilid_core.rs
+++ b/veilid-wasm/src/js_veilid_core.rs
@@ -275,12 +275,4 @@ impl JsVeilidCore {
         })
     }
 
-    pub fn wait_for_state(&self, state: JsVeilidState) -> Promise {
-        let core = self.core.clone();
-        future_to_promise(async move {
-            let state = Self::translate_veilid_state(state)?;
-            core.wait_for_state(state).await;
-            Ok(JsValue::UNDEFINED)
-        })
-    }
 }