implement real gateway path.

README.md

@@ -10,8 +10,8 @@ through the phone automatically.
 ## Current Status
 
 This repository contains the production architecture, protocol specification,
-Android project scaffold, Rust core scaffold, and the first USB-first engine
-interfaces. It is not yet a complete packet-forwarding release.
+Android project scaffold, Rust core scaffold, and a Linux-first USB gateway
+prototype.
 
 The first shippable milestone is:
 
@@ -21,6 +21,11 @@ The first shippable milestone is:
 - Desktop client foundation for Windows, Linux, and macOS.
 - Encrypted VSHP tunnel with QR/code pairing.
 
+The current desktop binary provides USB sharing through the Android gateway. On
+Linux it can create a real `vpnshare0` TUN interface and route normal OS/app
+traffic through the phone with `sudo ./target/debug/vpnshare-desktop
+system-gateway`. See [docs/desktop-client.md](docs/desktop-client.md).
+
 ## Important Platform Constraint
 
 VPN Share uses companion clients on receiving devices. This is required because
@@ -59,9 +64,6 @@ Android validation, once a healthy Gradle installation or wrapper is available:
 gradle :apps:android:app:assembleDebug
 ```
 
-The local environment used to create this scaffold had a broken system Gradle
-native-platform installation, so Android compilation was not executed locally.
-
 ## License
 
 Apache-2.0. See [LICENSE](LICENSE).