diff --git a/lib/flyt/build.gradle.kts b/lib/flyt/build.gradle.kts
new file mode 100644
index 00000000..ba3680d3
--- /dev/null
+++ b/lib/flyt/build.gradle.kts
@@ -0,0 +1,8 @@
+plugins {
+    alias(libs.plugins.kotlin.jvm)
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/MyClass.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/MyClass.kt
new file mode 100644
index 00000000..f5b70c9b
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/MyClass.kt
@@ -0,0 +1,4 @@
+package org.florisboard.lib.flyt
+
+class MyClass {
+}
\ No newline at end of file
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchAction.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchAction.kt
new file mode 100644
index 00000000..644b0e0d
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchAction.kt
@@ -0,0 +1,6 @@
+package org.florisboard.lib.flyt.touch
+
+sealed class TouchAction {
+    inner class Output(val ch: String)
+    inner class SwitchLayer(val to: String)
+}
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchKey.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchKey.kt
new file mode 100644
index 00000000..8f2b3058
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchKey.kt
@@ -0,0 +1,7 @@
+package org.florisboard.lib.flyt.touch
+
+import org.florisboard.lib.flyt.xml.FlytKey
+
+class TouchKey(val base: FlytKey) {
+    
+}
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchKeyboard.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchKeyboard.kt
new file mode 100644
index 00000000..73dee699
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchKeyboard.kt
@@ -0,0 +1,9 @@
+package org.florisboard.lib.flyt.touch
+
+import org.florisboard.lib.flyt.xml.FlytKeyboard
+
+class TouchKeyboard(val base: FlytKeyboard) {
+    private val layers = mutableMapOf<String, TouchLayer>()
+
+    fun compute(widthPx: Int, heightPx: Int) {}
+}
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchLayer.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchLayer.kt
new file mode 100644
index 00000000..9cdf6012
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchLayer.kt
@@ -0,0 +1,7 @@
+package org.florisboard.lib.flyt.touch
+
+import org.florisboard.lib.flyt.xml.FlytLayer
+
+class TouchLayer(val base: FlytLayer) {
+    private val rows = mutableListOf<TouchLayer>()
+}
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchRow.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchRow.kt
new file mode 100644
index 00000000..b11531a5
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/touch/TouchRow.kt
@@ -0,0 +1,7 @@
+package org.florisboard.lib.flyt.touch
+
+import org.florisboard.lib.flyt.xml.FlytRow
+
+class TouchRow(val base: FlytRow) {
+    private val keys = mutableListOf<TouchKey>()
+}
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytDisplay.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytDisplay.kt
new file mode 100644
index 00000000..2f862bc5
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytDisplay.kt
@@ -0,0 +1,7 @@
+package org.florisboard.lib.flyt.xml
+
+data class FlytDisplay(
+    val output: String?,
+    val keyId: String?,
+    val display: String,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytDisplayOptions.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytDisplayOptions.kt
new file mode 100644
index 00000000..e2a79db6
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytDisplayOptions.kt
@@ -0,0 +1,5 @@
+package org.florisboard.lib.flyt.xml
+
+data class FlytDisplayOptions(
+    val baseCharacter: String,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytInfo.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytInfo.kt
new file mode 100644
index 00000000..57ee5a63
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytInfo.kt
@@ -0,0 +1,8 @@
+package org.florisboard.lib.flyt.xml
+
+data class FlytInfo(
+    val name: String,
+    val author: String?,
+    val layout: String?,
+    val indicator: String?,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytKey.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytKey.kt
new file mode 100644
index 00000000..6732916c
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytKey.kt
@@ -0,0 +1,35 @@
+package org.florisboard.lib.flyt.xml
+
+/*
+Not all keys need to be listed explicitly. The following two can be assumed to already exist:
+
+<key id="gap" gap="true" width="1"/>
+<key id="space" output=" " stretch="true" width="1"/>
+
+In addition, these 62 keys, comprising 10 digit keys, 26 Latin lower-case keys, and 26 Latin upper-case keys, where the id is the same as the to, are assumed to exist:
+
+<key id="0" output="0"/>
+<key id="1" output="1"/>
+<key id="2" output="2"/>
+…
+<key id="A" output="A"/>
+<key id="B" output="B"/>
+<key id="C" output="C"/>
+…
+<key id="a" output="a"/>
+<key id="b" output="b"/>
+<key id="c" output="c"/>
+ */
+
+data class FlytKey(
+    val id: String,
+    val flickId: String?,
+    val gap: Boolean,
+    val output: String,
+    val longPressKeyIds: List<String>,
+    val longPressDefaultKeyId: String?,
+    val multiTapKeyIds: List<String>,
+    val stretch: Boolean,
+    val layerId: String,
+    val width: Double,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytKeyboard.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytKeyboard.kt
new file mode 100644
index 00000000..a8260b08
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytKeyboard.kt
@@ -0,0 +1,17 @@
+package org.florisboard.lib.flyt.xml
+
+import java.util.*
+
+data class FlytKeyboard(
+    val conformsTo: Int, // >= 45
+    val primaryLocale: Locale,
+    val secondaryLocales: List<Locale>,
+    val version: String,
+    val info: FlytInfo,
+    val settings: FlytSettings,
+    val displays: List<FlytDisplay>,
+    val displayOptions: FlytDisplayOptions,
+    val keys: List<FlytKey>,
+    val layers: List<FlytLayer>,
+    val variables: List<FlytVariable<*>>
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytLayer.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytLayer.kt
new file mode 100644
index 00000000..e9252847
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytLayer.kt
@@ -0,0 +1,7 @@
+package org.florisboard.lib.flyt.xml
+
+data class FlytLayer(
+    val id: String?,
+    val modifiers: String?,
+    val rows: List<FlytRow>,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytRow.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytRow.kt
new file mode 100644
index 00000000..fa3bb892
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytRow.kt
@@ -0,0 +1,5 @@
+package org.florisboard.lib.flyt.xml
+
+data class FlytRow(
+    val keys: List<String>,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytSettings.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytSettings.kt
new file mode 100644
index 00000000..f3a3fdfa
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytSettings.kt
@@ -0,0 +1,5 @@
+package org.florisboard.lib.flyt.xml
+
+data class FlytSettings(
+    val normalization: Boolean,
+)
diff --git a/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytVariable.kt b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytVariable.kt
new file mode 100644
index 00000000..eef3424a
--- /dev/null
+++ b/lib/flyt/src/main/kotlin/org/florisboard/lib/flyt/xml/FlytVariable.kt
@@ -0,0 +1,21 @@
+package org.florisboard.lib.flyt.xml
+
+sealed class FlytVariable<T> {
+    abstract val id: String
+    abstract val value: T
+}
+
+data class FlytStringVariable(
+    override val id: String,
+    override val value: String,
+) : FlytVariable<String>()
+
+data class FlytSetVariable(
+    override val id: String,
+    override val value: List<String>,
+) : FlytVariable<List<String>>()
+
+data class FlytUsetVariable(
+    override val id: String,
+    override val value: List<String>,
+) : FlytVariable<List<String>>()
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 6f150abb..d8ece76c 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -36,6 +36,7 @@ dependencyResolutionManagement {
 include(":app")
 include(":benchmark")
 include(":lib:android")
+include(":lib:flyt")
 include(":lib:kotlin")
 include(":lib:native")
 include(":lib:snygg")