diff --git a/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt b/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt
index d90e2c7..a0f6b4d 100644
--- a/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt
+++ b/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt
@@ -2,6 +2,7 @@ package io.nekohasekai.sfa.vendor
 
 import io.nekohasekai.libbox.HTTPResponseWriteToProgressHandler
 import io.nekohasekai.libbox.Libbox
+import io.nekohasekai.libbox.writeToWithProgress
 import io.nekohasekai.sfa.Application
 import io.nekohasekai.sfa.update.UpdateState
 import io.nekohasekai.sfa.utils.HTTPClient
diff --git a/app/src/main/java/io/nekohasekai/libbox/FDroidStubs.kt b/app/src/main/java/io/nekohasekai/libbox/FDroidStubs.kt
new file mode 100644
index 0000000..988dad4
--- /dev/null
+++ b/app/src/main/java/io/nekohasekai/libbox/FDroidStubs.kt
@@ -0,0 +1,27 @@
+package io.nekohasekai.libbox
+
+class FDroidMirror(
+    val url: String,
+    val name: String,
+    val country: String,
+)
+
+class FDroidMirrorIterator(
+    private val items: List<FDroidMirror>,
+) {
+    private var index = 0
+    fun hasNext(): Boolean = index < items.size
+    fun next(): FDroidMirror = items[index++]
+}
+
+class FDroidMirrorPingResult(
+    val url: String,
+    val latencyMs: Int,
+)
+
+class FDroidUpdateResult(
+    val versionCode: Int,
+    val versionName: String,
+    val downloadURL: String,
+    val fileSize: Long,
+)
diff --git a/app/src/main/java/io/nekohasekai/libbox/HTTPResponseWriteToProgressHandler.kt b/app/src/main/java/io/nekohasekai/libbox/HTTPResponseWriteToProgressHandler.kt
new file mode 100644
index 0000000..e4c6c23
--- /dev/null
+++ b/app/src/main/java/io/nekohasekai/libbox/HTTPResponseWriteToProgressHandler.kt
@@ -0,0 +1,5 @@
+package io.nekohasekai.libbox
+
+interface HTTPResponseWriteToProgressHandler {
+    fun update(progress: Long, total: Long)
+}
diff --git a/app/src/main/java/io/nekohasekai/libbox/LibboxStubs.kt b/app/src/main/java/io/nekohasekai/libbox/LibboxStubs.kt
new file mode 100644
index 0000000..fd5278e
--- /dev/null
+++ b/app/src/main/java/io/nekohasekai/libbox/LibboxStubs.kt
@@ -0,0 +1,34 @@
+package io.nekohasekai.libbox
+
+fun HTTPResponse.writeToWithProgress(path: String, handler: HTTPResponseWriteToProgressHandler) {
+    writeTo(path)
+}
+
+fun ConnectionOwner.setAndroidPackageNames(names: StringIterator) {
+    if (names.hasNext()) {
+        androidPackageName = names.next()
+    }
+}
+
+fun ProcessInfo.packageNames(): StringIterator? {
+    val name = packageName ?: return null
+    if (name.isEmpty()) return null
+    return object : StringIterator {
+        private var consumed = false
+        override fun len(): Int = 1
+        override fun hasNext(): Boolean = !consumed
+        override fun next(): String { consumed = true; return name }
+    }
+}
+
+fun getFDroidMirrors(): FDroidMirrorIterator {
+    return FDroidMirrorIterator(emptyList())
+}
+
+fun pingFDroidMirror(url: String): FDroidMirrorPingResult {
+    return FDroidMirrorPingResult(url, -1)
+}
+
+fun checkFDroidUpdate(mirrorUrl: String, packageName: String, versionCode: Int, cachePath: String): FDroidUpdateResult? {
+    return null
+}
diff --git a/app/src/main/java/io/nekohasekai/libbox/NeighborUpdateListener.kt b/app/src/main/java/io/nekohasekai/libbox/NeighborUpdateListener.kt
new file mode 100644
index 0000000..41c7261
--- /dev/null
+++ b/app/src/main/java/io/nekohasekai/libbox/NeighborUpdateListener.kt
@@ -0,0 +1,3 @@
+package io.nekohasekai.libbox
+
+interface NeighborUpdateListener
diff --git a/app/src/main/java/io/nekohasekai/sfa/bg/PlatformInterfaceWrapper.kt b/app/src/main/java/io/nekohasekai/sfa/bg/PlatformInterfaceWrapper.kt
index 7a0be3c..881cc06 100644
--- a/app/src/main/java/io/nekohasekai/sfa/bg/PlatformInterfaceWrapper.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/bg/PlatformInterfaceWrapper.kt
@@ -16,6 +16,7 @@ import io.nekohasekai.libbox.PlatformInterface
 import io.nekohasekai.libbox.StringIterator
 import io.nekohasekai.libbox.TunOptions
 import io.nekohasekai.libbox.WIFIState
+import io.nekohasekai.libbox.setAndroidPackageNames
 import io.nekohasekai.sfa.Application
 import java.net.Inet6Address
 import java.net.InetSocketAddress
diff --git a/app/src/main/java/io/nekohasekai/sfa/bg/ProxyService.kt b/app/src/main/java/io/nekohasekai/sfa/bg/ProxyService.kt
index 95972c9..c7c565d 100644
--- a/app/src/main/java/io/nekohasekai/sfa/bg/ProxyService.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/bg/ProxyService.kt
@@ -15,12 +15,10 @@ class ProxyService :
     override fun onBind(intent: Intent) = service.onBind()
 
     override fun onDestroy() = service.onDestroy()
-    override fun closeNeighborMonitor(listener: NeighborUpdateListener?) {
-
+    fun closeNeighborMonitor(listener: NeighborUpdateListener?) {
     }
 
     override fun sendNotification(notification: Notification) = service.sendNotification(notification)
-    override fun startNeighborMonitor(listener: NeighborUpdateListener?) {
-        
+    fun startNeighborMonitor(listener: NeighborUpdateListener?) {
     }
 }
diff --git a/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt b/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt
index cfb7534..f1b189e 100644
--- a/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt
@@ -52,7 +52,7 @@ class VPNService :
         protect(fd)
     }
 
-    override fun closeNeighborMonitor(listener: NeighborUpdateListener?) {
+    fun closeNeighborMonitor(listener: NeighborUpdateListener?) {
     }
 
     var systemProxyAvailable = false
@@ -186,6 +186,6 @@ class VPNService :
     }
 
     override fun sendNotification(notification: Notification) = service.sendNotification(notification)
-    override fun startNeighborMonitor(listener: NeighborUpdateListener?) {
+    fun startNeighborMonitor(listener: NeighborUpdateListener?) {
     }
 }
diff --git a/app/src/main/java/io/nekohasekai/sfa/compose/model/Connection.kt b/app/src/main/java/io/nekohasekai/sfa/compose/model/Connection.kt
index ee5953a..daed4a2 100644
--- a/app/src/main/java/io/nekohasekai/sfa/compose/model/Connection.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/compose/model/Connection.kt
@@ -1,6 +1,7 @@
 package io.nekohasekai.sfa.compose.model
 
 import androidx.compose.runtime.Immutable
+import io.nekohasekai.libbox.packageNames
 import io.nekohasekai.sfa.ktx.toList
 import io.nekohasekai.libbox.Connection as LibboxConnection
 import io.nekohasekai.libbox.ProcessInfo as LibboxProcessInfo
diff --git a/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt b/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt
index 9c94f63..83f33e1 100644
--- a/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt
@@ -84,6 +84,7 @@ import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.compose.LifecycleEventEffect
 import androidx.navigation.NavController
 import io.nekohasekai.libbox.Libbox
+import io.nekohasekai.libbox.getFDroidMirrors
 import io.nekohasekai.sfa.Application
 import io.nekohasekai.sfa.BuildConfig
 import io.nekohasekai.sfa.R
@@ -838,7 +839,7 @@ fun AppSettingsScreen(navController: NavController) {
                         supportingContent = {
                             val mirrorUrl = Settings.fdroidMirrorUrl
                             val mirrorName = remember(mirrorUrl) {
-                                val iter = Libbox.getFDroidMirrors()
+                                val iter = getFDroidMirrors()
                                 var name: String? = null
                                 while (iter.hasNext()) {
                                     val m = iter.next()
diff --git a/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/FDroidMirrorScreen.kt b/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/FDroidMirrorScreen.kt
index 1bce659..524eabf 100644
--- a/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/FDroidMirrorScreen.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/FDroidMirrorScreen.kt
@@ -52,6 +52,8 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
 import io.nekohasekai.libbox.Libbox
+import io.nekohasekai.libbox.getFDroidMirrors
+import io.nekohasekai.libbox.pingFDroidMirror
 import io.nekohasekai.sfa.R
 import io.nekohasekai.sfa.compose.topbar.OverrideTopBar
 import io.nekohasekai.sfa.database.Settings
@@ -99,7 +101,7 @@ fun FDroidMirrorScreen(navController: NavController) {
 
     val builtinMirrors = remember {
         val mirrors = mutableListOf<MirrorEntry>()
-        val iter = Libbox.getFDroidMirrors()
+        val iter = getFDroidMirrors()
         while (iter.hasNext()) {
             val m = iter.next()
             mirrors.add(MirrorEntry(url = m.url, name = m.name, country = m.country))
@@ -132,7 +134,7 @@ fun FDroidMirrorScreen(navController: NavController) {
         scope.launch {
             allMirrors.map { mirror ->
                 async(Dispatchers.IO) {
-                    val r = Libbox.pingFDroidMirror(mirror.url)
+                    val r = pingFDroidMirror(mirror.url)
                     withContext(Dispatchers.Main) {
                         if (r.latencyMs < 0) {
                             latencyErrors[r.url] = true
diff --git a/app/src/main/java/io/nekohasekai/sfa/update/FDroidUpdateChecker.kt b/app/src/main/java/io/nekohasekai/sfa/update/FDroidUpdateChecker.kt
index 98af76f..b068dca 100644
--- a/app/src/main/java/io/nekohasekai/sfa/update/FDroidUpdateChecker.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/update/FDroidUpdateChecker.kt
@@ -1,7 +1,7 @@
 package io.nekohasekai.sfa.update
 
 import android.content.Context
-import io.nekohasekai.libbox.Libbox
+import io.nekohasekai.libbox.checkFDroidUpdate as libboxCheckFDroidUpdate
 import io.nekohasekai.sfa.database.Settings
 
 fun checkFDroidUpdate(context: Context): UpdateInfo? {
@@ -9,7 +9,7 @@ fun checkFDroidUpdate(context: Context): UpdateInfo? {
 
     @Suppress("DEPRECATION")
     val versionCode = context.packageManager.getPackageInfo(packageName, 0).versionCode
-    val result = Libbox.checkFDroidUpdate(
+    val result = libboxCheckFDroidUpdate(
         Settings.fdroidMirrorUrl,
         packageName,
         versionCode,