diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 9372be5..f245f37 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -8,7 +8,7 @@ plugins {
 }
 
 android {
-    namespace = "com.reactorcoremeltdown.sizzletracker"
+    namespace = "space.rcmd.android.sizzle"
     compileSdk = 34
 
     // Native (Oboe) low-latency output backend; see src/main/cpp.
@@ -17,7 +17,7 @@ android {
     ndkVersion = "27.2.12479018"
 
     defaultConfig {
-        applicationId = "com.reactorcoremeltdown.sizzletracker"
+        applicationId = "space.rcmd.android.sizzle"
         // minSdk 26 (Android 8.0) is the floor for the native MIDI API
         // (android.media.midi) and AAudio low-latency audio we rely on.
         minSdk = 26
diff --git a/app/src/main/cpp/native_audio.cpp b/app/src/main/cpp/native_audio.cpp
index b1cbf5d..f3ee741 100644
--- a/app/src/main/cpp/native_audio.cpp
+++ b/app/src/main/cpp/native_audio.cpp
@@ -214,7 +214,7 @@ extern "C" JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void * /*reserved*/) {
 }
 
 extern "C" JNIEXPORT jboolean JNICALL
-Java_com_reactorcoremeltdown_sizzletracker_audio_NativeAudioBridge_nativeStart(
+Java_space_rcmd_android_sizzle_audio_NativeAudioBridge_nativeStart(
         JNIEnv *env, jobject /*thiz*/, jobject callback, jint sampleRate, jint framesPerCallback) {
     g_callback = env->NewGlobalRef(callback);
     jclass cls = env->GetObjectClass(callback);
@@ -241,7 +241,7 @@ Java_com_reactorcoremeltdown_sizzletracker_audio_NativeAudioBridge_nativeStart(
 }
 
 extern "C" JNIEXPORT void JNICALL
-Java_com_reactorcoremeltdown_sizzletracker_audio_NativeAudioBridge_nativeStop(
+Java_space_rcmd_android_sizzle_audio_NativeAudioBridge_nativeStop(
         JNIEnv *env, jobject /*thiz*/) {
     g_wantRunning = false; // stop the disconnect-recovery from reopening
     if (g_stream) {
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/MainActivity.kt b/app/src/main/java/space/rcmd/android/sizzle/MainActivity.kt
similarity index 91%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/MainActivity.kt
rename to app/src/main/java/space/rcmd/android/sizzle/MainActivity.kt
index 92c20d3..99c2adb 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/MainActivity.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/MainActivity.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker
+package space.rcmd.android.sizzle
 
 import android.Manifest
 import android.content.pm.PackageManager
@@ -16,13 +16,13 @@ import androidx.core.content.ContextCompat
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
-import com.reactorcoremeltdown.sizzletracker.input.GamepadInput
-import com.reactorcoremeltdown.sizzletracker.input.KeyboardInput
-import com.reactorcoremeltdown.sizzletracker.input.MidiInput
-import com.reactorcoremeltdown.sizzletracker.playback.PlaybackService
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.SizzleApp as SizzleAppUi
-import com.reactorcoremeltdown.sizzletracker.ui.theme.SizzleTheme
+import space.rcmd.android.sizzle.input.GamepadInput
+import space.rcmd.android.sizzle.input.KeyboardInput
+import space.rcmd.android.sizzle.input.MidiInput
+import space.rcmd.android.sizzle.playback.PlaybackService
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.SizzleApp as SizzleAppUi
+import space.rcmd.android.sizzle.ui.theme.SizzleTheme
 
 /**
  * The single Activity. Its jobs are narrow and clear:
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/SizzleApp.kt b/app/src/main/java/space/rcmd/android/sizzle/SizzleApp.kt
similarity index 83%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/SizzleApp.kt
rename to app/src/main/java/space/rcmd/android/sizzle/SizzleApp.kt
index 955ca76..95e0f57 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/SizzleApp.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/SizzleApp.kt
@@ -1,21 +1,21 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker
+package space.rcmd.android.sizzle
 
 import android.app.Application
-import com.reactorcoremeltdown.sizzletracker.audio.AudioEngine
-import com.reactorcoremeltdown.sizzletracker.input.BindingStore
-import com.reactorcoremeltdown.sizzletracker.input.GamepadInput
-import com.reactorcoremeltdown.sizzletracker.input.InputRouter
-import com.reactorcoremeltdown.sizzletracker.input.KeyboardInput
-import com.reactorcoremeltdown.sizzletracker.input.MidiInput
-import com.reactorcoremeltdown.sizzletracker.io.PresetLibrary
-import com.reactorcoremeltdown.sizzletracker.io.ProjectStore
-import com.reactorcoremeltdown.sizzletracker.io.SettingsStore
-import com.reactorcoremeltdown.sizzletracker.io.SongLibrary
-import com.reactorcoremeltdown.sizzletracker.io.ThemeLibrary
-import com.reactorcoremeltdown.sizzletracker.model.Project
+import space.rcmd.android.sizzle.audio.AudioEngine
+import space.rcmd.android.sizzle.input.BindingStore
+import space.rcmd.android.sizzle.input.GamepadInput
+import space.rcmd.android.sizzle.input.InputRouter
+import space.rcmd.android.sizzle.input.KeyboardInput
+import space.rcmd.android.sizzle.input.MidiInput
+import space.rcmd.android.sizzle.io.PresetLibrary
+import space.rcmd.android.sizzle.io.ProjectStore
+import space.rcmd.android.sizzle.io.SettingsStore
+import space.rcmd.android.sizzle.io.SongLibrary
+import space.rcmd.android.sizzle.io.ThemeLibrary
+import space.rcmd.android.sizzle.model.Project
 import java.io.File
 import kotlinx.coroutines.runBlocking
 
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/AmbienceReverb.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/AmbienceReverb.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/AmbienceReverb.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/AmbienceReverb.kt
index 0cab1b9..aa9a6eb 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/AmbienceReverb.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/AmbienceReverb.kt
@@ -1,10 +1,10 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
-import com.reactorcoremeltdown.sizzletracker.model.AmbiencePresets
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
+import space.rcmd.android.sizzle.model.AmbiencePresets
+import space.rcmd.android.sizzle.model.ToolboxSlot
 import kotlin.math.abs
 import kotlin.math.exp
 import kotlin.math.floor
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/AudioEngine.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/AudioEngine.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/AudioEngine.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/AudioEngine.kt
index 2ff7e13..1e8db1c 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/AudioEngine.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/AudioEngine.kt
@@ -1,18 +1,18 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 import android.media.AudioAttributes
 import android.media.AudioFormat
 import android.media.AudioTrack
-import com.reactorcoremeltdown.sizzletracker.model.Arrangement
-import com.reactorcoremeltdown.sizzletracker.model.Pattern
-import com.reactorcoremeltdown.sizzletracker.model.Project
-import com.reactorcoremeltdown.sizzletracker.model.SamplerPads
-import com.reactorcoremeltdown.sizzletracker.model.TimeDivision
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxType
+import space.rcmd.android.sizzle.model.Arrangement
+import space.rcmd.android.sizzle.model.Pattern
+import space.rcmd.android.sizzle.model.Project
+import space.rcmd.android.sizzle.model.SamplerPads
+import space.rcmd.android.sizzle.model.TimeDivision
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.model.ToolboxType
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlin.concurrent.thread
@@ -682,7 +682,7 @@ class AudioEngine(
      * its own MIDI effects (Transposer shifts pitch; an Arpeggiator captures the
      * note and hands retriggering to [advanceArps]).
      */
-    private fun triggerCell(proj: Project, lane: Int, cell: com.reactorcoremeltdown.sizzletracker.model.Cell) {
+    private fun triggerCell(proj: Project, lane: Int, cell: space.rcmd.android.sizzle.model.Cell) {
         for (bus in 0 until Pattern.TRACK_COUNT) {
             if (proj.mixer.channels[bus].midiChannel != cell.channel) continue
             val arp = arps[lane * Pattern.TRACK_COUNT + bus]
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/Effects.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/Effects.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/Effects.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/Effects.kt
index 47fcd2b..37170ac 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/Effects.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/Effects.kt
@@ -1,11 +1,11 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
-import com.reactorcoremeltdown.sizzletracker.model.DelayDivisions
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxType
+import space.rcmd.android.sizzle.model.DelayDivisions
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.model.ToolboxType
 import kotlin.math.PI
 import kotlin.math.abs
 import kotlin.math.cos
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/MasterRecorder.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/MasterRecorder.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/MasterRecorder.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/MasterRecorder.kt
index 0e4ca3c..a8de2e5 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/MasterRecorder.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/MasterRecorder.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 import java.io.File
 import java.io.RandomAccessFile
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/NativeAudioBridge.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/NativeAudioBridge.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/NativeAudioBridge.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/NativeAudioBridge.kt
index 6408a72..23d7511 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/NativeAudioBridge.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/NativeAudioBridge.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 /**
  * Bridges the native Oboe (AAudio) output backend to the Kotlin [AudioEngine].
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleRecorder.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/SampleRecorder.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleRecorder.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/SampleRecorder.kt
index d029296..2be7fe4 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleRecorder.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/SampleRecorder.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 import android.annotation.SuppressLint
 import android.media.AudioFormat
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleStore.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/SampleStore.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleStore.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/SampleStore.kt
index 3785f9c..4e24b64 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleStore.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/SampleStore.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 import java.nio.ByteBuffer
 import java.nio.ByteOrder
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleVoice.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/SampleVoice.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleVoice.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/SampleVoice.kt
index 9056323..53872a3 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SampleVoice.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/SampleVoice.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 import kotlin.math.exp
 
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SoundFontLoader.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/SoundFontLoader.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SoundFontLoader.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/SoundFontLoader.kt
index 5233d75..da5ede0 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SoundFontLoader.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/SoundFontLoader.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 import java.nio.ByteBuffer
 import java.nio.ByteOrder
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SynthVoice.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/SynthVoice.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SynthVoice.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/SynthVoice.kt
index fe81908..400f09f 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/SynthVoice.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/SynthVoice.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 /**
  * One playing note (a "voice"). This is a deliberately simple NES/Famicom-style
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/Transport.kt b/app/src/main/java/space/rcmd/android/sizzle/audio/Transport.kt
similarity index 91%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/Transport.kt
rename to app/src/main/java/space/rcmd/android/sizzle/audio/Transport.kt
index 4b3d5d7..0a01081 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/audio/Transport.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/audio/Transport.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.audio
+package space.rcmd.android.sizzle.audio
 
 /**
  * A small, immutable snapshot of "where playback is" that the audio thread
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/BindingStore.kt b/app/src/main/java/space/rcmd/android/sizzle/input/BindingStore.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/BindingStore.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/BindingStore.kt
index 63e3aa9..e7c2e7e 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/BindingStore.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/BindingStore.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 import android.content.Context
 import androidx.datastore.core.DataStore
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/GamepadInput.kt b/app/src/main/java/space/rcmd/android/sizzle/input/GamepadInput.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/GamepadInput.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/GamepadInput.kt
index 4de424c..db545c9 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/GamepadInput.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/GamepadInput.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 import android.view.InputDevice
 import android.view.KeyEvent
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputAction.kt b/app/src/main/java/space/rcmd/android/sizzle/input/InputAction.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputAction.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/InputAction.kt
index 62b55ca..86c059b 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputAction.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/InputAction.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 /**
  * The heart of the "four equal input methods" requirement. Touch, physical
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputActions.kt b/app/src/main/java/space/rcmd/android/sizzle/input/InputActions.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputActions.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/InputActions.kt
index 792a443..b41272f 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputActions.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/InputActions.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 /**
  * The single source of truth mapping a stable action-id string to the neutral
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputRouter.kt b/app/src/main/java/space/rcmd/android/sizzle/input/InputRouter.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputRouter.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/InputRouter.kt
index e042b2a..9ca843e 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/InputRouter.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/InputRouter.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.SharedFlow
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/KeyboardInput.kt b/app/src/main/java/space/rcmd/android/sizzle/input/KeyboardInput.kt
similarity index 97%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/KeyboardInput.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/KeyboardInput.kt
index ba6afb1..c177419 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/KeyboardInput.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/KeyboardInput.kt
@@ -1,10 +1,10 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 import android.view.KeyEvent
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
+import space.rcmd.android.sizzle.model.Pitch
 
 /**
  * Translates physical (USB / Bluetooth) keyboard events into [InputAction]s.
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/MidiInput.kt b/app/src/main/java/space/rcmd/android/sizzle/input/MidiInput.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/MidiInput.kt
rename to app/src/main/java/space/rcmd/android/sizzle/input/MidiInput.kt
index 2a1048e..60e3eda 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/input/MidiInput.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/input/MidiInput.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.input
+package space.rcmd.android.sizzle.input
 
 import android.content.Context
 import android.media.midi.MidiDeviceInfo
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/PresetIo.kt b/app/src/main/java/space/rcmd/android/sizzle/io/PresetIo.kt
similarity index 93%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/PresetIo.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/PresetIo.kt
index 5b9d80c..02e5a9f 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/PresetIo.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/PresetIo.kt
@@ -1,10 +1,10 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxType
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.model.ToolboxType
 
 /**
  * Reads and writes a single instrument/effect preset as plain, human-readable
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/PresetLibrary.kt b/app/src/main/java/space/rcmd/android/sizzle/io/PresetLibrary.kt
similarity index 97%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/PresetLibrary.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/PresetLibrary.kt
index 9b92175..42846fc 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/PresetLibrary.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/PresetLibrary.kt
@@ -1,14 +1,14 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.audio.SampleStore
-import com.reactorcoremeltdown.sizzletracker.model.AmbiencePresets
-import com.reactorcoremeltdown.sizzletracker.model.Project
-import com.reactorcoremeltdown.sizzletracker.model.SamplerPads
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxType
+import space.rcmd.android.sizzle.audio.SampleStore
+import space.rcmd.android.sizzle.model.AmbiencePresets
+import space.rcmd.android.sizzle.model.Project
+import space.rcmd.android.sizzle.model.SamplerPads
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.model.ToolboxType
 import java.io.File
 import java.io.InputStream
 import java.util.zip.ZipEntry
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ProjectIo.kt b/app/src/main/java/space/rcmd/android/sizzle/io/ProjectIo.kt
similarity index 92%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ProjectIo.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/ProjectIo.kt
index 6e4b3d9..678ce37 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ProjectIo.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/ProjectIo.kt
@@ -1,15 +1,15 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.model.Cell
-import com.reactorcoremeltdown.sizzletracker.model.Mixer
-import com.reactorcoremeltdown.sizzletracker.model.Pattern
-import com.reactorcoremeltdown.sizzletracker.model.Project
-import com.reactorcoremeltdown.sizzletracker.model.Scale
-import com.reactorcoremeltdown.sizzletracker.model.TimeSignature
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxType
+import space.rcmd.android.sizzle.model.Cell
+import space.rcmd.android.sizzle.model.Mixer
+import space.rcmd.android.sizzle.model.Pattern
+import space.rcmd.android.sizzle.model.Project
+import space.rcmd.android.sizzle.model.Scale
+import space.rcmd.android.sizzle.model.TimeSignature
+import space.rcmd.android.sizzle.model.ToolboxType
 
 /**
  * Saves and loads a whole [Project] to/from the `.sng` text format.
@@ -87,7 +87,7 @@ object ProjectIo {
         // Reset everything to a clean slate first.
         project.patterns.clear()
         for (lane in project.arrangement.slots.indices)
-            project.arrangement.slots[lane].fill(com.reactorcoremeltdown.sizzletracker.model.Arrangement.EMPTY)
+            project.arrangement.slots[lane].fill(space.rcmd.android.sizzle.model.Arrangement.EMPTY)
         project.arrangement.laneMuted.fill(false)
         project.toolbox.forEach { it.clearSlot() }
         project.mixer.channels.forEach { ch ->
@@ -119,7 +119,7 @@ object ProjectIo {
                     // are restored from the explicit lane,beat,pid lines regardless).
                     project.arrangement.lengthBars =
                         attrs["bars"]?.toIntOrNull()
-                            ?: com.reactorcoremeltdown.sizzletracker.model.Arrangement.MAX_BARS
+                            ?: space.rcmd.android.sizzle.model.Arrangement.MAX_BARS
                     project.arrangement.loopEnabled = attrs["loop"] == "1"
                     attrs["mutes"]?.let { m ->
                         val lanes = project.arrangement.laneMuted
@@ -142,7 +142,7 @@ object ProjectIo {
         }
         // Guarantee one block per lane (lane i is tied to block i), padding any
         // that the file did not define so the arrangement/editor always resolve.
-        for (id in 0 until com.reactorcoremeltdown.sizzletracker.model.Arrangement.LANE_COUNT) {
+        for (id in 0 until space.rcmd.android.sizzle.model.Arrangement.LANE_COUNT) {
             if (project.patterns.none { it.id == id }) project.patterns.add(Pattern(id, name = "BLK${id + 1}"))
         }
         project.patterns.sortBy { it.id }
@@ -193,7 +193,7 @@ object ProjectIo {
         p.arrangement.set(lane, beat, pid)
     }
 
-    private fun applyRegion(region: com.reactorcoremeltdown.sizzletracker.model.LoopRegion, a: Map<String, String>) {
+    private fun applyRegion(region: space.rcmd.android.sizzle.model.LoopRegion, a: Map<String, String>) {
         region.enabled = a["en"] == "1"
         region.start = a["s"]?.toIntOrNull() ?: 0
         region.end = a["e"]?.toIntOrNull() ?: 0
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ProjectStore.kt b/app/src/main/java/space/rcmd/android/sizzle/io/ProjectStore.kt
similarity index 92%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ProjectStore.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/ProjectStore.kt
index 05b15bf..9b121e1 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ProjectStore.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/ProjectStore.kt
@@ -1,9 +1,9 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.model.Project
+import space.rcmd.android.sizzle.model.Project
 import java.io.File
 
 /**
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SettingsStore.kt b/app/src/main/java/space/rcmd/android/sizzle/io/SettingsStore.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SettingsStore.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/SettingsStore.kt
index 2506c2d..eb86a1c 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SettingsStore.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/SettingsStore.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
 import android.content.Context
 import androidx.datastore.core.DataStore
@@ -32,7 +32,7 @@ data class AppSettings(
  * Persists app-level UI/audio settings (the colour theme and the low-latency
  * engine toggle). Song/mixer/toolbox parameters live in the project and are
  * handled by [ProjectStore]; input bindings by
- * [com.reactorcoremeltdown.sizzletracker.input.BindingStore].
+ * [space.rcmd.android.sizzle.input.BindingStore].
  *
  * Audio output/input *device* selection is intentionally not persisted: Android
  * device ids are session-scoped and don't identify the same hardware next launch.
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SngFormat.kt b/app/src/main/java/space/rcmd/android/sizzle/io/SngFormat.kt
similarity index 93%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SngFormat.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/SngFormat.kt
index ae25fdb..58be0f3 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SngFormat.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/SngFormat.kt
@@ -1,14 +1,14 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.model.Arrangement
-import com.reactorcoremeltdown.sizzletracker.model.Cell
-import com.reactorcoremeltdown.sizzletracker.model.Pattern
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.model.Project
-import com.reactorcoremeltdown.sizzletracker.model.TimeSignature
+import space.rcmd.android.sizzle.model.Arrangement
+import space.rcmd.android.sizzle.model.Cell
+import space.rcmd.android.sizzle.model.Pattern
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.model.Project
+import space.rcmd.android.sizzle.model.TimeSignature
 
 /**
  * Reads and writes the reference desktop **sizzletracker `.sng`** format
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SongLibrary.kt b/app/src/main/java/space/rcmd/android/sizzle/io/SongLibrary.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SongLibrary.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/SongLibrary.kt
index 5e420fd..45c91a5 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/SongLibrary.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/SongLibrary.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
 import java.io.File
 
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ThemeIo.kt b/app/src/main/java/space/rcmd/android/sizzle/io/ThemeIo.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ThemeIo.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/ThemeIo.kt
index 67159a9..779c2c4 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ThemeIo.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/ThemeIo.kt
@@ -1,10 +1,10 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
 import androidx.compose.ui.graphics.Color
-import com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette
+import space.rcmd.android.sizzle.ui.theme.RetroPalette
 
 /**
  * Reads and writes a colour [RetroPalette] as plain, human-editable text — the same
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ThemeLibrary.kt b/app/src/main/java/space/rcmd/android/sizzle/io/ThemeLibrary.kt
similarity index 95%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ThemeLibrary.kt
rename to app/src/main/java/space/rcmd/android/sizzle/io/ThemeLibrary.kt
index bb5dc62..1d2264e 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/io/ThemeLibrary.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/io/ThemeLibrary.kt
@@ -1,9 +1,9 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette
+import space.rcmd.android.sizzle.ui.theme.RetroPalette
 import java.io.File
 
 /**
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/AmbiencePresets.kt b/app/src/main/java/space/rcmd/android/sizzle/model/AmbiencePresets.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/AmbiencePresets.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/AmbiencePresets.kt
index 5d0efac..c664537 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/AmbiencePresets.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/AmbiencePresets.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * Factory data for the [ToolboxType.AMBIENCE] reverb, ported from OTODESK's
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Arrangement.kt b/app/src/main/java/space/rcmd/android/sizzle/model/Arrangement.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Arrangement.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/Arrangement.kt
index 0af2b4b..cce7be5 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Arrangement.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/Arrangement.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * The lower-half piano-roll arrangement. It has [LANE_COUNT] lanes stacked
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Mixer.kt b/app/src/main/java/space/rcmd/android/sizzle/model/Mixer.kt
similarity index 97%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Mixer.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/Mixer.kt
index 24944cb..8dad204 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Mixer.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/Mixer.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * The mixer has exactly [CHANNEL_COUNT] channels, one per tracker track. Each
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Music.kt b/app/src/main/java/space/rcmd/android/sizzle/model/Music.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Music.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/Music.kt
index c3455c6..ecadacc 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Music.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/Music.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * Musical primitives shared across the whole app: pitches, scales and time
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Pattern.kt b/app/src/main/java/space/rcmd/android/sizzle/model/Pattern.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Pattern.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/Pattern.kt
index bea1afe..087c659 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Pattern.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/Pattern.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * One cell in the tracker grid: a single note event on a single line of a single
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Project.kt b/app/src/main/java/space/rcmd/android/sizzle/model/Project.kt
similarity index 94%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Project.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/Project.kt
index 3a5672c..9d48fee 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Project.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/Project.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * The whole song in memory. This single object is what gets saved to / loaded
@@ -9,7 +9,7 @@ package com.reactorcoremeltdown.sizzletracker.model
  * Keeping one root object makes serialization and undo/redo straightforward.
  *
  * Persistence is done by our own text serializer (see
- * [com.reactorcoremeltdown.sizzletracker.io.ProjectIo]), not kotlinx, so the
+ * [space.rcmd.android.sizzle.io.ProjectIo]), not kotlinx, so the
  * model classes carry no serialization annotations.
  */
 class Project {
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Toolbox.kt b/app/src/main/java/space/rcmd/android/sizzle/model/Toolbox.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Toolbox.kt
rename to app/src/main/java/space/rcmd/android/sizzle/model/Toolbox.kt
index 14af7ed..9332675 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/model/Toolbox.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/model/Toolbox.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.model
+package space.rcmd.android.sizzle.model
 
 /**
  * The third tab is a toolbox of 16 slots. Every slot can hold one instrument OR
@@ -273,7 +273,7 @@ enum class TimeDivision(val label: String, val beatFraction: Double) {
  * sample file path live in the same map under keys the engine knows about
  * (e.g. "samplePath", "target").
  *
- * (Serialized via [com.reactorcoremeltdown.sizzletracker.io.PresetIo], not
+ * (Serialized via [space.rcmd.android.sizzle.io.PresetIo], not
  * kotlinx, so no @Serializable annotation is needed here.)
  */
 class ToolboxSlot(
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/playback/EnginePlayer.kt b/app/src/main/java/space/rcmd/android/sizzle/playback/EnginePlayer.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/playback/EnginePlayer.kt
rename to app/src/main/java/space/rcmd/android/sizzle/playback/EnginePlayer.kt
index 908c2d4..bc59899 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/playback/EnginePlayer.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/playback/EnginePlayer.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.playback
+package space.rcmd.android.sizzle.playback
 
 import android.os.Looper
 import androidx.media3.common.MediaItem
@@ -11,7 +11,7 @@ import androidx.media3.common.SimpleBasePlayer
 import androidx.media3.common.util.UnstableApi
 import com.google.common.util.concurrent.Futures
 import com.google.common.util.concurrent.ListenableFuture
-import com.reactorcoremeltdown.sizzletracker.audio.AudioEngine
+import space.rcmd.android.sizzle.audio.AudioEngine
 
 /**
  * Adapts our custom [AudioEngine] to the media3 [Player] interface via
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/playback/PlaybackService.kt b/app/src/main/java/space/rcmd/android/sizzle/playback/PlaybackService.kt
similarity index 95%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/playback/PlaybackService.kt
rename to app/src/main/java/space/rcmd/android/sizzle/playback/PlaybackService.kt
index eeefbf4..49ba218 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/playback/PlaybackService.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/playback/PlaybackService.kt
@@ -1,14 +1,14 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.playback
+package space.rcmd.android.sizzle.playback
 
 import android.content.Context
 import android.content.Intent
 import androidx.media3.common.util.UnstableApi
 import androidx.media3.session.MediaSession
 import androidx.media3.session.MediaSessionService
-import com.reactorcoremeltdown.sizzletracker.SizzleApp
+import space.rcmd.android.sizzle.SizzleApp
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/App.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/App.kt
similarity index 93%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/App.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/App.kt
index dfdaed8..49d934f 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/App.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/App.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui
+package space.rcmd.android.sizzle.ui
 
 import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.background
@@ -29,11 +29,11 @@ import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.vector.ImageVector
-import com.reactorcoremeltdown.sizzletracker.ui.mixer.MixerScreen
-import com.reactorcoremeltdown.sizzletracker.ui.settings.SettingsScreen
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
-import com.reactorcoremeltdown.sizzletracker.ui.toolbox.ToolboxScreen
-import com.reactorcoremeltdown.sizzletracker.ui.tracker.TrackerScreen
+import space.rcmd.android.sizzle.ui.mixer.MixerScreen
+import space.rcmd.android.sizzle.ui.settings.SettingsScreen
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.ui.toolbox.ToolboxScreen
+import space.rcmd.android.sizzle.ui.tracker.TrackerScreen
 
 /**
  * The top-level layout: the active tab's screen fills the space above a standard
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/AppViewModel.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/AppViewModel.kt
similarity index 86%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/AppViewModel.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/AppViewModel.kt
index db09550..394ed32 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/AppViewModel.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/AppViewModel.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui
+package space.rcmd.android.sizzle.ui
 
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableIntStateOf
@@ -10,15 +10,15 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
-import com.reactorcoremeltdown.sizzletracker.audio.AudioEngine
-import com.reactorcoremeltdown.sizzletracker.input.InputAction
-import com.reactorcoremeltdown.sizzletracker.input.InputRouter
-import com.reactorcoremeltdown.sizzletracker.model.Cell
-import com.reactorcoremeltdown.sizzletracker.model.CellColumn
-import com.reactorcoremeltdown.sizzletracker.model.Pattern
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.model.Project
-import com.reactorcoremeltdown.sizzletracker.model.TimeSignature
+import space.rcmd.android.sizzle.audio.AudioEngine
+import space.rcmd.android.sizzle.input.InputAction
+import space.rcmd.android.sizzle.input.InputRouter
+import space.rcmd.android.sizzle.model.Cell
+import space.rcmd.android.sizzle.model.CellColumn
+import space.rcmd.android.sizzle.model.Pattern
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.model.Project
+import space.rcmd.android.sizzle.model.TimeSignature
 import kotlinx.coroutines.launch
 
 /**
@@ -36,14 +36,14 @@ class AppViewModel(
     val project: Project,
     private val engine: AudioEngine,
     private val router: InputRouter,
-    private val gamepadInput: com.reactorcoremeltdown.sizzletracker.input.GamepadInput,
-    private val midiInput: com.reactorcoremeltdown.sizzletracker.input.MidiInput,
-    private val keyboardInput: com.reactorcoremeltdown.sizzletracker.input.KeyboardInput,
-    private val bindingStore: com.reactorcoremeltdown.sizzletracker.input.BindingStore,
-    private val presetLibrary: com.reactorcoremeltdown.sizzletracker.io.PresetLibrary,
-    private val songLibrary: com.reactorcoremeltdown.sizzletracker.io.SongLibrary,
-    private val settingsStore: com.reactorcoremeltdown.sizzletracker.io.SettingsStore,
-    private val themeLibrary: com.reactorcoremeltdown.sizzletracker.io.ThemeLibrary,
+    private val gamepadInput: space.rcmd.android.sizzle.input.GamepadInput,
+    private val midiInput: space.rcmd.android.sizzle.input.MidiInput,
+    private val keyboardInput: space.rcmd.android.sizzle.input.KeyboardInput,
+    private val bindingStore: space.rcmd.android.sizzle.input.BindingStore,
+    private val presetLibrary: space.rcmd.android.sizzle.io.PresetLibrary,
+    private val songLibrary: space.rcmd.android.sizzle.io.SongLibrary,
+    private val settingsStore: space.rcmd.android.sizzle.io.SettingsStore,
+    private val themeLibrary: space.rcmd.android.sizzle.io.ThemeLibrary,
     private val appContext: android.content.Context,
 ) : ViewModel() {
 
@@ -52,7 +52,7 @@ class AppViewModel(
     var revision by mutableIntStateOf(0); private set   // bump to force grid redraw
     /** Active colour theme; read by [MainActivity] to drive SizzleTheme. Set via
      *  [selectPalette] so the choice is persisted. */
-    var palette by mutableStateOf(com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette.AMBER)
+    var palette by mutableStateOf(space.rcmd.android.sizzle.ui.theme.RetroPalette.AMBER)
         private set
 
     // Tracker cursor position.
@@ -110,7 +110,7 @@ class AppViewModel(
     // ----- Binding-learn state (Settings tab) -----
     /** The action id currently waiting to be bound, or null. */
     var learnTarget by mutableStateOf<String?>(null); private set
-    private var learnSource: com.reactorcoremeltdown.sizzletracker.input.InputSource? = null
+    private var learnSource: space.rcmd.android.sizzle.input.InputSource? = null
 
     init {
         // Collect neutral input actions from every non-touch device.
@@ -444,7 +444,7 @@ class AppViewModel(
     // ------------------------------------------------------- binding learn
     /** Arm MIDI-learn / gamepad-rebind: the next matching control is bound to
      *  [actionId]. [source] restricts which device kind will be captured. */
-    fun beginLearn(actionId: String, source: com.reactorcoremeltdown.sizzletracker.input.InputSource) {
+    fun beginLearn(actionId: String, source: space.rcmd.android.sizzle.input.InputSource) {
         learnTarget = actionId
         learnSource = source
         router.learnSource = source
@@ -465,15 +465,15 @@ class AppViewModel(
         val target = learnTarget ?: return
         if (action.source != learnSource) return
         when (action.source) {
-            com.reactorcoremeltdown.sizzletracker.input.InputSource.MIDI ->
+            space.rcmd.android.sizzle.input.InputSource.MIDI ->
                 midiInput.ccBindings[action.code] = target
-            com.reactorcoremeltdown.sizzletracker.input.InputSource.GAMEPAD -> {
+            space.rcmd.android.sizzle.input.InputSource.GAMEPAD -> {
                 gamepadInput.bindings.entries.removeAll { it.value == target }
                 gamepadInput.bindings[
-                    com.reactorcoremeltdown.sizzletracker.input.GamepadChord(action.modifier, action.code),
+                    space.rcmd.android.sizzle.input.GamepadChord(action.modifier, action.code),
                 ] = target
             }
-            com.reactorcoremeltdown.sizzletracker.input.InputSource.KEYBOARD -> {
+            space.rcmd.android.sizzle.input.InputSource.KEYBOARD -> {
                 keyboardInput.bindings.entries.removeAll { it.value == target }
                 keyboardInput.bindings[action.code] = target
             }
@@ -490,20 +490,20 @@ class AppViewModel(
 
     /** Current gamepad chord (modifier + button, or plain button) bound to
      *  [actionId], or null. */
-    fun gamepadBindingFor(actionId: String): com.reactorcoremeltdown.sizzletracker.input.GamepadChord? =
+    fun gamepadBindingFor(actionId: String): space.rcmd.android.sizzle.input.GamepadChord? =
         gamepadInput.bindings.entries.firstOrNull { it.value == actionId }?.key
 
     /** Current keyboard key code bound to [actionId], or null. */
     fun keyboardBindingFor(actionId: String): Int? =
         keyboardInput.bindings.entries.firstOrNull { it.value == actionId }?.key
 
-    fun clearBinding(actionId: String, source: com.reactorcoremeltdown.sizzletracker.input.InputSource) {
+    fun clearBinding(actionId: String, source: space.rcmd.android.sizzle.input.InputSource) {
         when (source) {
-            com.reactorcoremeltdown.sizzletracker.input.InputSource.MIDI ->
+            space.rcmd.android.sizzle.input.InputSource.MIDI ->
                 midiInput.ccBindings.entries.removeAll { it.value == actionId }
-            com.reactorcoremeltdown.sizzletracker.input.InputSource.GAMEPAD ->
+            space.rcmd.android.sizzle.input.InputSource.GAMEPAD ->
                 gamepadInput.bindings.entries.removeAll { it.value == actionId }
-            com.reactorcoremeltdown.sizzletracker.input.InputSource.KEYBOARD ->
+            space.rcmd.android.sizzle.input.InputSource.KEYBOARD ->
                 keyboardInput.bindings.entries.removeAll { it.value == actionId }
             else -> {}
         }
@@ -538,26 +538,26 @@ class AppViewModel(
 
     /** Nudge an A/B loop region's repeat count and apply it to live playback
      *  immediately (without restarting the transport). */
-    fun changeRegionRepeats(region: com.reactorcoremeltdown.sizzletracker.model.LoopRegion, delta: Int) {
+    fun changeRegionRepeats(region: space.rcmd.android.sizzle.model.LoopRegion, delta: Int) {
         region.repeats = (region.repeats + delta).coerceAtLeast(1)
         engine.refreshLoopPlaylist()
         touched()
     }
 
     // -------------------------------------------------------------- sampler
-    private val recorder = com.reactorcoremeltdown.sizzletracker.audio.SampleRecorder()
+    private val recorder = space.rcmd.android.sizzle.audio.SampleRecorder()
     var isRecording by mutableStateOf(false); private set
 
     /** Decode a WAV and assign it to Sampler [slot]'s [pad] (from a file import). */
     fun loadSampleInto(
-        slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot,
+        slot: space.rcmd.android.sizzle.model.ToolboxSlot,
         pad: Int,
         id: String,
         bytes: ByteArray,
     ): Boolean {
-        val sample = com.reactorcoremeltdown.sizzletracker.audio.SampleStore.decodeWav(bytes) ?: return false
-        com.reactorcoremeltdown.sizzletracker.audio.SampleStore.put(id, sample)
-        val pads = com.reactorcoremeltdown.sizzletracker.model.SamplerPads
+        val sample = space.rcmd.android.sizzle.audio.SampleStore.decodeWav(bytes) ?: return false
+        space.rcmd.android.sizzle.audio.SampleStore.put(id, sample)
+        val pads = space.rcmd.android.sizzle.model.SamplerPads
         slot.set(pads.key(pad), id)
         slot.set(pads.sliceStartKey(pad), 0f); slot.set(pads.sliceEndKey(pad), 1f)
         touched()
@@ -567,12 +567,12 @@ class AppViewModel(
     /** Load an SF2 / XI (or WAV) file into a SoundFont [slot]: parse it, cache the
      *  extracted sample, and store its id + root note on the slot. */
     fun loadSoundFont(
-        slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot,
+        slot: space.rcmd.android.sizzle.model.ToolboxSlot,
         id: String,
         bytes: ByteArray,
     ): Boolean {
-        val loaded = com.reactorcoremeltdown.sizzletracker.audio.SoundFontLoader.load(bytes) ?: return false
-        com.reactorcoremeltdown.sizzletracker.audio.SampleStore.put(id, loaded.sample)
+        val loaded = space.rcmd.android.sizzle.audio.SoundFontLoader.load(bytes) ?: return false
+        space.rcmd.android.sizzle.audio.SampleStore.put(id, loaded.sample)
         slot.set("sfSample", id)
         slot.set("sfRoot", loaded.rootNote.toFloat())
         touched()
@@ -585,9 +585,9 @@ class AppViewModel(
      * and the markers reset to the full (new) sample. There is no undo — re-import
      * or re-record to start over. Returns false if there's nothing to trim.
      */
-    fun trimSamplerPad(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, pad: Int): Boolean {
-        val pads = com.reactorcoremeltdown.sizzletracker.model.SamplerPads
-        val store = com.reactorcoremeltdown.sizzletracker.audio.SampleStore
+    fun trimSamplerPad(slot: space.rcmd.android.sizzle.model.ToolboxSlot, pad: Int): Boolean {
+        val pads = space.rcmd.android.sizzle.model.SamplerPads
+        val store = space.rcmd.android.sizzle.audio.SampleStore
         val sample = store.get(slot.string(pads.key(pad))) ?: return false
         val len = sample.data.size
         if (len <= 1) return false
@@ -598,7 +598,7 @@ class AppViewModel(
         if (start == 0 && end == len) return false // slice already spans the whole sample
         // A fresh id so other pads sharing the original sample are left untouched.
         val id = "trim:" + System.nanoTime()
-        store.put(id, com.reactorcoremeltdown.sizzletracker.audio.SampleStore.Sample(
+        store.put(id, space.rcmd.android.sizzle.audio.SampleStore.Sample(
             sample.data.copyOfRange(start, end), sample.sampleRate))
         slot.set(pads.key(pad), id)
         slot.set(pads.sliceStartKey(pad), 0f)
@@ -613,9 +613,9 @@ class AppViewModel(
      * the same). No undo. Returns false if the pad is empty, silent, or already
      * normalized.
      */
-    fun normalizeSamplerPad(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, pad: Int): Boolean {
-        val pads = com.reactorcoremeltdown.sizzletracker.model.SamplerPads
-        val store = com.reactorcoremeltdown.sizzletracker.audio.SampleStore
+    fun normalizeSamplerPad(slot: space.rcmd.android.sizzle.model.ToolboxSlot, pad: Int): Boolean {
+        val pads = space.rcmd.android.sizzle.model.SamplerPads
+        val store = space.rcmd.android.sizzle.audio.SampleStore
         val sample = store.get(slot.string(pads.key(pad))) ?: return false
         val data = sample.data
         if (data.isEmpty()) return false
@@ -626,15 +626,15 @@ class AppViewModel(
         if (gain in 0.999f..1.001f) return false      // already at full scale
         val out = FloatArray(data.size) { (data[it] * gain).coerceIn(-1f, 1f) }
         val id = "norm:" + System.nanoTime()          // fresh id so shared samples are untouched
-        store.put(id, com.reactorcoremeltdown.sizzletracker.audio.SampleStore.Sample(out, sample.sampleRate))
+        store.put(id, space.rcmd.android.sizzle.audio.SampleStore.Sample(out, sample.sampleRate))
         slot.set(pads.key(pad), id)
         touched()
         return true
     }
 
     /** Clear the sample assigned to a Sampler [slot]'s [pad]. */
-    fun clearSamplerPad(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, pad: Int) {
-        val pads = com.reactorcoremeltdown.sizzletracker.model.SamplerPads
+    fun clearSamplerPad(slot: space.rcmd.android.sizzle.model.ToolboxSlot, pad: Int) {
+        val pads = space.rcmd.android.sizzle.model.SamplerPads
         slot.values.remove(pads.key(pad))
         slot.values.remove(pads.sliceStartKey(pad))
         slot.values.remove(pads.sliceEndKey(pad))
@@ -664,19 +664,19 @@ class AppViewModel(
     fun dismissNativeAudioError() { nativeAudioError = null }
 
     /** Choose the colour theme and persist the choice. */
-    fun selectPalette(p: com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette) {
+    fun selectPalette(p: space.rcmd.android.sizzle.ui.theme.RetroPalette) {
         palette = p
         persistSettings()
     }
 
     // ------------------------------------------------------------ colour themes
-    private val stockThemes get() = com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette.ALL
+    private val stockThemes get() = space.rcmd.android.sizzle.ui.theme.RetroPalette.ALL
 
     /** The two built-in themes are read-only and can never be deleted. */
     fun isStockTheme(name: String): Boolean = stockThemes.any { it.name == name }
 
     /** Every selectable theme: the two stock themes followed by user themes. */
-    fun allThemes(): List<com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette> =
+    fun allThemes(): List<space.rcmd.android.sizzle.ui.theme.RetroPalette> =
         stockThemes + themeLibrary.loadAll()
 
     /** All theme names for the selector dropdown (stock first, then user). */
@@ -705,7 +705,7 @@ class AppViewModel(
         if (isStockTheme(name)) return false
         val ok = themeLibrary.delete(name)
         if (ok) {
-            if (palette.name == name) selectPalette(com.reactorcoremeltdown.sizzletracker.ui.theme.RetroPalette.AMBER)
+            if (palette.name == name) selectPalette(space.rcmd.android.sizzle.ui.theme.RetroPalette.AMBER)
             touched()
         }
         return ok
@@ -759,13 +759,13 @@ class AppViewModel(
     }
 
     /** Stop recording and assign the captured audio to Sampler [slot]'s [pad]. */
-    fun stopRecordingInto(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, pad: Int) {
+    fun stopRecordingInto(slot: space.rcmd.android.sizzle.model.ToolboxSlot, pad: Int) {
         val sample = recorder.stop()
         isRecording = false
         if (sample != null) {
             val id = "rec-" + System.currentTimeMillis()
-            com.reactorcoremeltdown.sizzletracker.audio.SampleStore.put(id, sample)
-            val pads = com.reactorcoremeltdown.sizzletracker.model.SamplerPads
+            space.rcmd.android.sizzle.audio.SampleStore.put(id, sample)
+            val pads = space.rcmd.android.sizzle.model.SamplerPads
             slot.set(pads.key(pad), id)
             slot.set(pads.sliceStartKey(pad), 0f); slot.set(pads.sliceEndKey(pad), 1f)
             touched()
@@ -775,7 +775,7 @@ class AppViewModel(
     /** Point an LFO slot at another device's parameter, capturing that param's
      *  current value as the modulation centre. Pass targetSlotIndex < 0 to clear. */
     fun setLfoTarget(
-        lfoSlot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot,
+        lfoSlot: space.rcmd.android.sizzle.model.ToolboxSlot,
         targetSlotIndex: Int,
         key: String,
     ) {
@@ -791,7 +791,7 @@ class AppViewModel(
     }
 
     /** Preview a note of the Sampler slot's loaded sample (one-shot, editor use). */
-    fun auditionSample(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, midi: Int) {
+    fun auditionSample(slot: space.rcmd.android.sizzle.model.ToolboxSlot, midi: Int) {
         engine.auditionSlotOn(slot.index, midi)
     }
 
@@ -803,18 +803,18 @@ class AppViewModel(
     // ------------------------------------------------------------ project I/O
     /** Serialize the current song to `.sng` text. */
     fun saveProjectText(): String =
-        com.reactorcoremeltdown.sizzletracker.io.ProjectIo.save(project)
+        space.rcmd.android.sizzle.io.ProjectIo.save(project)
 
     /** Replace the current song's contents from our full internal text (in place). */
     fun loadProjectText(text: String) {
-        com.reactorcoremeltdown.sizzletracker.io.ProjectIo.loadInto(project, text)
+        space.rcmd.android.sizzle.io.ProjectIo.loadInto(project, text)
         cursorLine = 0; cursorTrack = 0
         touched()
     }
 
     /** Export to the reference desktop sizzletracker `.sng` format (musical data). */
     fun exportSng(): String =
-        com.reactorcoremeltdown.sizzletracker.io.SngFormat.export(project)
+        space.rcmd.android.sizzle.io.SngFormat.export(project)
 
     /** Import a reference `.sng` file (in place). Returns false if the text doesn't
      *  look like a `.sng` (so the caller can surface a popup) rather than silently
@@ -823,7 +823,7 @@ class AppViewModel(
         val looksLikeSng = Regex("(?m)^\\s*(version|bpm|sig|block)\\b").containsMatchIn(text)
         if (!looksLikeSng) return false
         runCatching {
-            com.reactorcoremeltdown.sizzletracker.io.SngFormat.importInto(project, text)
+            space.rcmd.android.sizzle.io.SngFormat.importInto(project, text)
         }.getOrElse { return false }
         cursorLine = 0; cursorTrack = 0
         touched()
@@ -854,7 +854,7 @@ class AppViewModel(
      */
     fun newProject() {
         engine.stop()
-        loadProjectText(com.reactorcoremeltdown.sizzletracker.io.ProjectIo.save(Project()))
+        loadProjectText(space.rcmd.android.sizzle.io.ProjectIo.save(Project()))
         project.name = "untitled"
         engine.rebuildFxChains()   // all FX routing was cleared
     }
@@ -882,11 +882,11 @@ class AppViewModel(
 
     // ------------------------------------------------------ instrument/effect presets
     /** Preset names available for a device type (for the editor's browser dropdown). */
-    fun presetNames(type: com.reactorcoremeltdown.sizzletracker.model.ToolboxType): List<String> =
+    fun presetNames(type: space.rcmd.android.sizzle.model.ToolboxType): List<String> =
         presetLibrary.list(type)
 
     /** Save [slot] as a named preset in the library. Returns the preset file. */
-    fun savePreset(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, name: String): java.io.File {
+    fun savePreset(slot: space.rcmd.android.sizzle.model.ToolboxSlot, name: String): java.io.File {
         val file = presetLibrary.save(slot, name)
         touched()
         return file
@@ -894,7 +894,7 @@ class AppViewModel(
 
     /** Load a named preset for [slot]'s current type into it. The slot is renamed to
      *  the preset so the toolbox tile and mixer inserts read as the loaded sound. */
-    fun loadPreset(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, name: String): Boolean {
+    fun loadPreset(slot: space.rcmd.android.sizzle.model.ToolboxSlot, name: String): Boolean {
         val type = slot.type ?: return false
         val ok = presetLibrary.load(slot, type, name)
         if (ok) { slot.name = name; engine.rebuildFxChains(); touched() }
@@ -902,7 +902,7 @@ class AppViewModel(
     }
 
     /** Import a preset from picked bytes: a `.zip` bundle (Sampler) or plain text. */
-    fun importPreset(slot: com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot, bytes: ByteArray): Boolean {
+    fun importPreset(slot: space.rcmd.android.sizzle.model.ToolboxSlot, bytes: ByteArray): Boolean {
         val isZip = bytes.size >= 2 && bytes[0] == 'P'.code.toByte() && bytes[1] == 'K'.code.toByte()
         val ok = if (isZip) presetLibrary.importZip(slot, java.io.ByteArrayInputStream(bytes))
         else presetLibrary.importText(slot, String(bytes, Charsets.UTF_8))
@@ -911,11 +911,11 @@ class AppViewModel(
     }
 
     /** A shareable file for a stored preset (a zip bundle for the Sampler). */
-    fun presetShareFile(type: com.reactorcoremeltdown.sizzletracker.model.ToolboxType, name: String): java.io.File? =
+    fun presetShareFile(type: space.rcmd.android.sizzle.model.ToolboxType, name: String): java.io.File? =
         presetLibrary.bundleForShare(type, name)
 
     /** Delete a stored preset (and, for the Sampler, its bundled sample). */
-    fun deletePreset(type: com.reactorcoremeltdown.sizzletracker.model.ToolboxType, name: String): Boolean {
+    fun deletePreset(type: space.rcmd.android.sizzle.model.ToolboxType, name: String): Boolean {
         val ok = presetLibrary.delete(type, name)
         if (ok) touched()
         return ok
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/Responsive.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/Responsive.kt
similarity index 94%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/Responsive.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/Responsive.kt
index d1b5f28..b4664ee 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/Responsive.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/Responsive.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui
+package space.rcmd.android.sizzle.ui
 
 import android.content.res.Configuration
 import androidx.compose.runtime.Composable
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/StackedKeyboard.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/StackedKeyboard.kt
similarity index 93%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/StackedKeyboard.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/StackedKeyboard.kt
index 667b43c..78b4f1a 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/StackedKeyboard.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/StackedKeyboard.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui
+package space.rcmd.android.sizzle.ui
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.gestures.awaitEachGesture
@@ -26,11 +26,11 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.ui.components.PianoKey
-import com.reactorcoremeltdown.sizzletracker.ui.components.PianoOctave
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.ui.components.PianoKey
+import space.rcmd.android.sizzle.ui.components.PianoOctave
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 private const val VEL_STEP = 8
 
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/GlyphCache.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/components/GlyphCache.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/GlyphCache.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/components/GlyphCache.kt
index ae8503f..294dfa9 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/GlyphCache.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/components/GlyphCache.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.components
+package space.rcmd.android.sizzle.ui.components
 
 import androidx.compose.ui.text.TextLayoutResult
 import androidx.compose.ui.text.TextMeasurer
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/Piano.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/components/Piano.kt
similarity index 97%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/Piano.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/components/Piano.kt
index 7adca1e..e9e423c 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/Piano.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/components/Piano.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.components
+package space.rcmd.android.sizzle.ui.components
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
@@ -23,7 +23,7 @@ import androidx.compose.ui.graphics.RectangleShape
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * Lays out one octave as a real piano keyboard: seven white keys across the bottom
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/Widgets.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/components/Widgets.kt
similarity index 97%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/Widgets.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/components/Widgets.kt
index ce76e65..282c98b 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/components/Widgets.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/components/Widgets.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.components
+package space.rcmd.android.sizzle.ui.components
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
@@ -26,7 +26,7 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * A tiny library of "pixel" UI building blocks. They are intentionally plain —
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/mixer/MixerScreen.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/mixer/MixerScreen.kt
similarity index 94%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/mixer/MixerScreen.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/mixer/MixerScreen.kt
index e14b685..3b25f85 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/mixer/MixerScreen.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/mixer/MixerScreen.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.mixer
+package space.rcmd.android.sizzle.ui.mixer
 
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -34,15 +34,15 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.Mixer
-import com.reactorcoremeltdown.sizzletracker.model.MixerChannel
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxKind
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.isLandscape
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroDropdown
-import com.reactorcoremeltdown.sizzletracker.ui.components.SectionLabel
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.Mixer
+import space.rcmd.android.sizzle.model.MixerChannel
+import space.rcmd.android.sizzle.model.ToolboxKind
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.isLandscape
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.components.RetroDropdown
+import space.rcmd.android.sizzle.ui.components.SectionLabel
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * The second tab: a four-channel mixer, one strip per tracker track. Each strip
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/settings/SettingsScreen.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/settings/SettingsScreen.kt
similarity index 98%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/settings/SettingsScreen.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/settings/SettingsScreen.kt
index 70315e3..cce6336 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/settings/SettingsScreen.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/settings/SettingsScreen.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.settings
+package space.rcmd.android.sizzle.ui.settings
 
 import android.content.Context
 import android.content.Intent
@@ -60,10 +60,10 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.core.content.FileProvider
-import com.reactorcoremeltdown.sizzletracker.input.GamepadChord
-import com.reactorcoremeltdown.sizzletracker.input.GamepadInput
-import com.reactorcoremeltdown.sizzletracker.input.InputSource
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
+import space.rcmd.android.sizzle.input.GamepadChord
+import space.rcmd.android.sizzle.input.GamepadInput
+import space.rcmd.android.sizzle.input.InputSource
+import space.rcmd.android.sizzle.ui.AppViewModel
 
 /**
  * The fourth tab, built from STANDARD Material 3 components (Cards, Buttons,
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/theme/Theme.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/theme/Theme.kt
similarity index 99%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/theme/Theme.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/theme/Theme.kt
index 326bb2f..03d26a8 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/theme/Theme.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/theme/Theme.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.theme
+package space.rcmd.android.sizzle.ui.theme
 
 import android.app.Activity
 import androidx.compose.foundation.isSystemInDarkTheme
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/DelayEditor.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/DelayEditor.kt
similarity index 94%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/DelayEditor.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/DelayEditor.kt
index a250548..736d700 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/DelayEditor.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/DelayEditor.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.toolbox
+package space.rcmd.android.sizzle.ui.toolbox
 
 import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.background
@@ -25,11 +25,11 @@ import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.DelayDivisions
-import com.reactorcoremeltdown.sizzletracker.model.ParamSpec
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.DelayDivisions
+import space.rcmd.android.sizzle.model.ParamSpec
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * The Tape Delay's custom editor: four tape heads side by side, each a vertical
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/LfoEditor.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/LfoEditor.kt
similarity index 88%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/LfoEditor.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/LfoEditor.kt
index c831a00..774960c 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/LfoEditor.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/LfoEditor.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.toolbox
+package space.rcmd.android.sizzle.ui.toolbox
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -13,10 +13,10 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroDropdown
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.components.RetroDropdown
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * A modulation target: a numeric parameter on another device the LFO can drive.
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/ParamControl.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/ParamControl.kt
similarity index 87%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/ParamControl.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/ParamControl.kt
index a9f2810..afe51fb 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/ParamControl.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/ParamControl.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.toolbox
+package space.rcmd.android.sizzle.ui.toolbox
 
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -13,11 +13,11 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.ParamSpec
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroDropdown
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.ParamSpec
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.components.RetroDropdown
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 import kotlin.math.roundToInt
 
 /**
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/SamplerEditor.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/SamplerEditor.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/SamplerEditor.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/SamplerEditor.kt
index 54eb5d8..f9d9b38 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/SamplerEditor.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/SamplerEditor.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.toolbox
+package space.rcmd.android.sizzle.ui.toolbox
 
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -37,13 +37,13 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.audio.SampleStore
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.model.SamplerPads
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.audio.SampleStore
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.model.SamplerPads
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 import kotlin.math.abs
 
 /**
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/SoundFontEditor.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/SoundFontEditor.kt
similarity index 93%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/SoundFontEditor.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/SoundFontEditor.kt
index dadf5a9..0f7baa4 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/SoundFontEditor.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/SoundFontEditor.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.toolbox
+package space.rcmd.android.sizzle.ui.toolbox
 
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -38,20 +38,20 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.audio.SampleStore
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.components.PianoKey
-import com.reactorcoremeltdown.sizzletracker.ui.components.PianoOctave
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.audio.SampleStore
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.components.PianoKey
+import space.rcmd.android.sizzle.ui.components.PianoOctave
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * The SoundFont device editor: load an `.sf2` / `.xi` (or `.wav`) file from local
  * storage, preview its waveform, set output volume, and audition it pitched across
  * a two-octave keyboard. The extracted sample plays across the whole keyboard from
- * the file's root note (see [com.reactorcoremeltdown.sizzletracker.audio.SoundFontLoader]).
+ * the file's root note (see [space.rcmd.android.sizzle.audio.SoundFontLoader]).
  */
 @Composable
 fun SoundFontEditor(vm: AppViewModel, slot: ToolboxSlot) {
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/ToolboxScreen.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/ToolboxScreen.kt
similarity index 96%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/ToolboxScreen.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/ToolboxScreen.kt
index 3bef659..ad0a486 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/toolbox/ToolboxScreen.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/toolbox/ToolboxScreen.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.toolbox
+package space.rcmd.android.sizzle.ui.toolbox
 
 import android.content.Intent
 import androidx.activity.compose.BackHandler
@@ -54,14 +54,14 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.core.content.FileProvider
-import com.reactorcoremeltdown.sizzletracker.model.ParamSpec
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxSlot
-import com.reactorcoremeltdown.sizzletracker.model.ToolboxType
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.isLandscape
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroDropdown
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.ParamSpec
+import space.rcmd.android.sizzle.model.ToolboxSlot
+import space.rcmd.android.sizzle.model.ToolboxType
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.isLandscape
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.components.RetroDropdown
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 import kotlinx.coroutines.launch
 
 /**
@@ -104,7 +104,7 @@ fun ToolboxScreen(vm: AppViewModel) {
             ToolboxTileGrid(vm, selected, onTapTile, onDoubleTapTile, onLongPressTile,
                 Modifier.weight(1f).fillMaxHeight())
             Box(Modifier.width(2.dp).fillMaxHeight().background(c.accent))
-            com.reactorcoremeltdown.sizzletracker.ui.StackedKeyboard(vm, punchIn = false, Modifier.weight(1.3f))
+            space.rcmd.android.sizzle.ui.StackedKeyboard(vm, punchIn = false, Modifier.weight(1.3f))
         }
     } else {
         // Portrait: a scrolling grid of square tiles above the keyboard (1.7 : 1).
@@ -126,7 +126,7 @@ fun ToolboxScreen(vm: AppViewModel) {
                 }
             }
             Box(Modifier.fillMaxWidth().height(2.dp).background(c.accent)) // fixed divider
-            com.reactorcoremeltdown.sizzletracker.ui.StackedKeyboard(vm, punchIn = false, Modifier.weight(1f))
+            space.rcmd.android.sizzle.ui.StackedKeyboard(vm, punchIn = false, Modifier.weight(1f))
         }
     }
 
@@ -373,7 +373,7 @@ private val AMBIENCE_SECTIONS = listOf(
  * the presets saved for this device type, plus Save (to the app's on-disk preset
  * library), Import (from a picked text preset or — for the Sampler — a `.zip`
  * bundle), and Share (via the system share sheet). Presets are the plain-text
- * [com.reactorcoremeltdown.sizzletracker.io.PresetIo] format, stored one folder
+ * [space.rcmd.android.sizzle.io.PresetIo] format, stored one folder
  * per instrument/effect.
  */
 @Composable
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/ArrangementRoll.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/tracker/ArrangementRoll.kt
similarity index 97%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/ArrangementRoll.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/tracker/ArrangementRoll.kt
index 029a639..43c0371 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/ArrangementRoll.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/tracker/ArrangementRoll.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.tracker
+package space.rcmd.android.sizzle.ui.tracker
 
 import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.background
@@ -42,12 +42,12 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.rememberTextMeasurer
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.Arrangement as ArrModel
-import com.reactorcoremeltdown.sizzletracker.model.LoopRegion
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.components.GlyphCache
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.Arrangement as ArrModel
+import space.rcmd.android.sizzle.model.LoopRegion
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.components.GlyphCache
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * The lower-half arrangement. Layout (spreadsheet-style, like the sizzletracker
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/PatternGrid.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/tracker/PatternGrid.kt
similarity index 95%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/PatternGrid.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/tracker/PatternGrid.kt
index 1916bd8..1dd0a71 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/PatternGrid.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/tracker/PatternGrid.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.tracker
+package space.rcmd.android.sizzle.ui.tracker
 
 import androidx.compose.foundation.Canvas
 import androidx.compose.foundation.background
@@ -23,13 +23,13 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.rememberTextMeasurer
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.Cell
-import com.reactorcoremeltdown.sizzletracker.model.CellColumn
-import com.reactorcoremeltdown.sizzletracker.model.Pattern
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.components.GlyphCache
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.Cell
+import space.rcmd.android.sizzle.model.CellColumn
+import space.rcmd.android.sizzle.model.Pattern
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.components.GlyphCache
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * The demoscene pattern grid, drawn as ONE [Canvas] instead of a tree of ~180
diff --git a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/TrackerScreen.kt b/app/src/main/java/space/rcmd/android/sizzle/ui/tracker/TrackerScreen.kt
similarity index 92%
rename from app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/TrackerScreen.kt
rename to app/src/main/java/space/rcmd/android/sizzle/ui/tracker/TrackerScreen.kt
index d1b52c8..41180b2 100644
--- a/app/src/main/java/com/reactorcoremeltdown/sizzletracker/ui/tracker/TrackerScreen.kt
+++ b/app/src/main/java/space/rcmd/android/sizzle/ui/tracker/TrackerScreen.kt
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.ui.tracker
+package space.rcmd.android.sizzle.ui.tracker
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.horizontalScroll
@@ -28,12 +28,12 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.reactorcoremeltdown.sizzletracker.model.TimeSignature
-import com.reactorcoremeltdown.sizzletracker.ui.AppViewModel
-import com.reactorcoremeltdown.sizzletracker.ui.isLandscape
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroButton
-import com.reactorcoremeltdown.sizzletracker.ui.components.RetroDropdown
-import com.reactorcoremeltdown.sizzletracker.ui.theme.LocalRetro
+import space.rcmd.android.sizzle.model.TimeSignature
+import space.rcmd.android.sizzle.ui.AppViewModel
+import space.rcmd.android.sizzle.ui.isLandscape
+import space.rcmd.android.sizzle.ui.components.RetroButton
+import space.rcmd.android.sizzle.ui.components.RetroDropdown
+import space.rcmd.android.sizzle.ui.theme.LocalRetro
 
 /**
  * The first tab. Two stacked halves:
@@ -54,7 +54,7 @@ fun TrackerScreen(vm: AppViewModel) {
 private fun TrackerLower(vm: AppViewModel, modifier: Modifier) {
     Box(modifier) {
         if (vm.punchInMode) {
-            com.reactorcoremeltdown.sizzletracker.ui.StackedKeyboard(vm, punchIn = true, Modifier.fillMaxSize())
+            space.rcmd.android.sizzle.ui.StackedKeyboard(vm, punchIn = true, Modifier.fillMaxSize())
         } else {
             ArrangementRoll(vm)
         }
@@ -188,7 +188,7 @@ private fun PatternButtons(vm: AppViewModel) {
     )
     RetroDropdown(
         label = "SCALE",
-        options = com.reactorcoremeltdown.sizzletracker.model.Scale.entries,
+        options = space.rcmd.android.sizzle.model.Scale.entries,
         selected = project.scale,
         optionLabel = { it.label },
         onSelect = { project.scale = it; vm.bumpForToolbar() },
@@ -197,7 +197,7 @@ private fun PatternButtons(vm: AppViewModel) {
         label = "ROOT",
         options = (0..11).toList(),
         selected = project.rootNote,
-        optionLabel = { com.reactorcoremeltdown.sizzletracker.model.Pitch.name(60 + it).dropLast(1) },
+        optionLabel = { space.rcmd.android.sizzle.model.Pitch.name(60 + it).dropLast(1) },
         onSelect = { project.rootNote = it; vm.bumpForToolbar() },
     )
 }
diff --git a/app/src/test/java/com/reactorcoremeltdown/sizzletracker/io/SngFormatTest.kt b/app/src/test/java/space/rcmd/android/sizzle/io/SngFormatTest.kt
similarity index 90%
rename from app/src/test/java/com/reactorcoremeltdown/sizzletracker/io/SngFormatTest.kt
rename to app/src/test/java/space/rcmd/android/sizzle/io/SngFormatTest.kt
index 4811516..62d7af5 100644
--- a/app/src/test/java/com/reactorcoremeltdown/sizzletracker/io/SngFormatTest.kt
+++ b/app/src/test/java/space/rcmd/android/sizzle/io/SngFormatTest.kt
@@ -1,12 +1,12 @@
 // SPDX-FileCopyrightText: 2026 Reactorcoremeltdown
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-package com.reactorcoremeltdown.sizzletracker.io
+package space.rcmd.android.sizzle.io
 
-import com.reactorcoremeltdown.sizzletracker.model.Arrangement
-import com.reactorcoremeltdown.sizzletracker.model.Pitch
-import com.reactorcoremeltdown.sizzletracker.model.Project
-import com.reactorcoremeltdown.sizzletracker.model.TimeSignature
+import space.rcmd.android.sizzle.model.Arrangement
+import space.rcmd.android.sizzle.model.Pitch
+import space.rcmd.android.sizzle.model.Project
+import space.rcmd.android.sizzle.model.TimeSignature
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNotEquals
 import org.junit.Assert.assertTrue
diff --git a/docs/DEVELOPER_HANDOVER.md b/docs/DEVELOPER_HANDOVER.md
index cb8f32d..2e5a62f 100644
--- a/docs/DEVELOPER_HANDOVER.md
+++ b/docs/DEVELOPER_HANDOVER.md
@@ -84,7 +84,7 @@ Three ideas hold it together:
 ## 4. Package/file map
 
 ```
-com.reactorcoremeltdown.sizzletracker
+space.rcmd.android.sizzle
 ├── SizzleApp.kt            Application = tiny DI container (Project, InputRouter, AudioEngine)
 ├── MainActivity.kt         Hosts Compose UI; forwards HW key/motion events; starts MIDI + service
 │