diff --git a/build-support/src/main/kotlin/app/cash/redwood/buildsupport/RedwoodBuildPlugin.kt b/build-support/src/main/kotlin/app/cash/redwood/buildsupport/RedwoodBuildPlugin.kt
index 3c3517f489..64e8002332 100644
--- a/build-support/src/main/kotlin/app/cash/redwood/buildsupport/RedwoodBuildPlugin.kt
+++ b/build-support/src/main/kotlin/app/cash/redwood/buildsupport/RedwoodBuildPlugin.kt
@@ -126,7 +126,10 @@ class RedwoodBuildPlugin : Plugin<Project> {
           )
           .editorConfigOverride(
             mapOf(
+              // Lowercase names are great for grouping multiple functions and/or types.
               "ktlint_standard_filename" to "disabled",
+              // Making something an expression body should be a choice around readability.
+              "ktlint_standard_function-expression-body" to "disabled",
               "ktlint_function_naming_ignore_when_annotated_with" to "Composable",
               "ktlint_compose_compositionlocal-allowlist" to "disabled",
             ),
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 6b761ee872..0c026d5765 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -84,7 +84,7 @@ coil-compose = { module = "io.coil-kt.coil3:coil-compose-core", version.ref = "c
 coil-core = { module = "io.coil-kt.coil3:coil", version.ref = "coil" }
 coil-network-okhttp = { module = "io.coil-kt.coil3:coil-network-okhttp", version.ref = "coil" }
 turbine = "app.cash.turbine:turbine:1.1.0"
-ktlint = "com.pinterest.ktlint:ktlint-cli:1.2.1"
+ktlint = "com.pinterest.ktlint:ktlint-cli:1.3.0"
 ktlintComposeRules = "io.nlopez.compose.rules:ktlint:0.4.3"
 googleJavaFormat = "com.google.googlejavaformat:google-java-format:1.22.0"
 poko-gradlePlugin = "dev.drewhamilton.poko:poko-gradle-plugin:0.15.2"
diff --git a/redwood-compose/src/commonMain/kotlin/app/cash/redwood/compose/WidgetApplier.kt b/redwood-compose/src/commonMain/kotlin/app/cash/redwood/compose/WidgetApplier.kt
index 86b1ca2f92..493ef0f3a2 100644
--- a/redwood-compose/src/commonMain/kotlin/app/cash/redwood/compose/WidgetApplier.kt
+++ b/redwood-compose/src/commonMain/kotlin/app/cash/redwood/compose/WidgetApplier.kt
@@ -55,7 +55,8 @@ internal class NodeApplier<W : Any>(
   override val widgetSystem: WidgetSystem<W>,
   root: Widget.Children<W>,
   private val onEndChanges: () -> Unit,
-) : AbstractApplier<Node<W>>(ChildrenNode(root)), RedwoodApplier<W> {
+) : AbstractApplier<Node<W>>(ChildrenNode(root)),
+  RedwoodApplier<W> {
   private var closed = false
   private val changedWidgets = LinkedHashSet<ChangeListener>()
 
diff --git a/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningButton.kt b/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningButton.kt
index 30b83109f3..9cf96ec279 100644
--- a/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningButton.kt
+++ b/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningButton.kt
@@ -21,7 +21,9 @@ import app.cash.redwood.widget.ChangeListener
 import com.example.redwood.testapp.testing.ButtonValue
 import com.example.redwood.testapp.widget.Button
 
-class ListeningButton : Button<WidgetValue>, ChangeListener {
+class ListeningButton :
+  Button<WidgetValue>,
+  ChangeListener {
   private val changes = ArrayList<String>()
   fun changes(): List<String> {
     val snapshot = changes.toList()
diff --git a/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningTestRow.kt b/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningTestRow.kt
index 6154496075..c6620b917e 100644
--- a/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningTestRow.kt
+++ b/redwood-compose/src/commonTest/kotlin/app/cash/redwood/compose/ListeningTestRow.kt
@@ -22,7 +22,9 @@ import app.cash.redwood.widget.Widget
 import com.example.redwood.testapp.testing.TestRowValue
 import com.example.redwood.testapp.widget.TestRow
 
-class ListeningTestRow : TestRow<WidgetValue>, ChangeListener {
+class ListeningTestRow :
+  TestRow<WidgetValue>,
+  ChangeListener {
   private val changes = ArrayList<String>()
   fun changes(): List<String> {
     val snapshot = changes.toList()
diff --git a/redwood-gradle-plugin/src/main/kotlin/app/cash/redwood/gradle/RedwoodComposeExtensionImpl.kt b/redwood-gradle-plugin/src/main/kotlin/app/cash/redwood/gradle/RedwoodComposeExtensionImpl.kt
index 63f3e42680..b4a043484d 100644
--- a/redwood-gradle-plugin/src/main/kotlin/app/cash/redwood/gradle/RedwoodComposeExtensionImpl.kt
+++ b/redwood-gradle-plugin/src/main/kotlin/app/cash/redwood/gradle/RedwoodComposeExtensionImpl.kt
@@ -23,7 +23,8 @@ import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
 
 internal class RedwoodComposeExtensionImpl(
   private val project: Project,
-) : RedwoodComposeExtension, DangerZone {
+) : RedwoodComposeExtension,
+  DangerZone {
   private var metricsEnabled = false
   private var reportsEnabled = false
 
diff --git a/redwood-layout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiFlexContainerTest.kt b/redwood-layout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiFlexContainerTest.kt
index 61031d42a7..12f040daa4 100644
--- a/redwood-layout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiFlexContainerTest.kt
+++ b/redwood-layout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiFlexContainerTest.kt
@@ -66,7 +66,8 @@ class ComposeUiFlexContainerTest(
 
   class ComposeTestFlexContainer private constructor(
     private val delegate: ComposeUiFlexContainer,
-  ) : TestFlexContainer<@Composable () -> Unit>, FlexContainer<@Composable () -> Unit> by delegate {
+  ) : TestFlexContainer<@Composable () -> Unit>,
+    FlexContainer<@Composable () -> Unit> by delegate {
     private var childCount = 0
     override val children: ComposeWidgetChildren = delegate.children
     constructor(direction: FlexDirection, backgroundColor: Int) : this(
diff --git a/redwood-layout-dom/src/commonMain/kotlin/app/cash/redwood/layout/dom/HTMLElementRedwoodLayoutWidgetFactory.kt b/redwood-layout-dom/src/commonMain/kotlin/app/cash/redwood/layout/dom/HTMLElementRedwoodLayoutWidgetFactory.kt
index 86a0d9e066..d7230d5c6c 100644
--- a/redwood-layout-dom/src/commonMain/kotlin/app/cash/redwood/layout/dom/HTMLElementRedwoodLayoutWidgetFactory.kt
+++ b/redwood-layout-dom/src/commonMain/kotlin/app/cash/redwood/layout/dom/HTMLElementRedwoodLayoutWidgetFactory.kt
@@ -129,8 +129,7 @@ private class HTMLSpacer(
 private class HTMLFlexElementChildren(
   private val container: HTMLElement,
   private val delegate: HTMLElementChildren = HTMLElementChildren(container),
-) :
-  Widget.Children<HTMLElement> by delegate {
+) : Widget.Children<HTMLElement> by delegate {
   override fun onModifierUpdated(index: Int, widget: Widget<HTMLElement>) {
     widget.applyModifiers(clearStyles = true)
     delegate.onModifierUpdated(index, widget)
diff --git a/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/AbstractFlexContainerTest.kt b/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/AbstractFlexContainerTest.kt
index c150607138..1b31f3a7db 100644
--- a/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/AbstractFlexContainerTest.kt
+++ b/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/AbstractFlexContainerTest.kt
@@ -604,7 +604,9 @@ abstract class AbstractFlexContainerTest<T : Any> {
   }
 }
 
-interface TestFlexContainer<T : Any> : Widget<T>, ChangeListener {
+interface TestFlexContainer<T : Any> :
+  Widget<T>,
+  ChangeListener {
   override val value: T
   val children: Widget.Children<T>
   fun width(width: Constraint)
diff --git a/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/utils.common.kt b/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/utils.common.kt
index 2789de2e8c..e489dc4064 100644
--- a/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/utils.common.kt
+++ b/redwood-layout-shared-test/src/commonMain/kotlin/app/cash/redwood/layout/utils.common.kt
@@ -64,7 +64,8 @@ fun assumeTrue(b: Boolean) {
 
 internal data class CrossAxisAlignmentImpl(
   override val alignment: CrossAxisAlignment,
-) : HorizontalAlignment, VerticalAlignment
+) : HorizontalAlignment,
+  VerticalAlignment
 
 internal data class WidthImpl(
   override val width: Dp,
diff --git a/redwood-layout-uiview/src/commonMain/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainer.kt b/redwood-layout-uiview/src/commonMain/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainer.kt
index a5ab5e81c3..98fc0eb9b1 100644
--- a/redwood-layout-uiview/src/commonMain/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainer.kt
+++ b/redwood-layout-uiview/src/commonMain/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainer.kt
@@ -30,7 +30,8 @@ import platform.darwin.NSInteger
 
 internal class UIViewFlexContainer(
   direction: FlexDirection,
-) : YogaFlexContainer<UIView>, ChangeListener {
+) : YogaFlexContainer<UIView>,
+  ChangeListener {
   private val yogaView: YogaUIView = YogaUIView(
     applyModifier = { node, index ->
       node.applyModifier(node.context as Modifier, Density.Default)
diff --git a/redwood-layout-uiview/src/commonTest/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainerTest.kt b/redwood-layout-uiview/src/commonTest/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainerTest.kt
index 9475e59064..9ace70ad40 100644
--- a/redwood-layout-uiview/src/commonTest/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainerTest.kt
+++ b/redwood-layout-uiview/src/commonTest/kotlin/app/cash/redwood/layout/uiview/UIViewFlexContainerTest.kt
@@ -46,7 +46,9 @@ class UIViewFlexContainerTest(
 
   class UIViewTestFlexContainer internal constructor(
     private val delegate: UIViewFlexContainer,
-  ) : TestFlexContainer<UIView>, FlexContainer<UIView> by delegate, ChangeListener by delegate {
+  ) : TestFlexContainer<UIView>,
+    FlexContainer<UIView> by delegate,
+    ChangeListener by delegate {
     private var childCount = 0
     override val children: Widget.Children<UIView> = delegate.children
 
diff --git a/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewBox.kt b/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewBox.kt
index 73c1180c7e..de70eafcb4 100644
--- a/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewBox.kt
+++ b/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewBox.kt
@@ -39,7 +39,8 @@ import app.cash.redwood.widget.ViewGroupChildren
 
 internal class ViewBox(
   context: Context,
-) : FrameLayout(context), Box<View> {
+) : FrameLayout(context),
+  Box<View> {
   private val density = Density(context.resources)
   private var horizontalAlignment = CrossAxisAlignment.Start
   private var verticalAlignment = CrossAxisAlignment.Start
diff --git a/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewFlexContainer.kt b/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewFlexContainer.kt
index 09d5e930f6..d267eba0cc 100644
--- a/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewFlexContainer.kt
+++ b/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewFlexContainer.kt
@@ -39,7 +39,8 @@ import app.cash.redwood.yoga.isHorizontal
 internal class ViewFlexContainer(
   private val context: Context,
   private val direction: FlexDirection,
-) : YogaFlexContainer<View>, ChangeListener {
+) : YogaFlexContainer<View>,
+  ChangeListener {
   private val yogaLayout: YogaLayout = YogaLayout(
     context,
     applyModifier = { node, index ->
diff --git a/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewSpacer.kt b/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewSpacer.kt
index 252a1974b8..5046ee23cf 100644
--- a/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewSpacer.kt
+++ b/redwood-layout-view/src/main/kotlin/app/cash/redwood/layout/view/ViewSpacer.kt
@@ -27,7 +27,8 @@ import kotlin.math.min
 
 internal class ViewSpacer(
   context: Context,
-) : View(context), Spacer<View> {
+) : View(context),
+  Spacer<View> {
   private val density = Density(context.resources)
 
   override val value get() = this
diff --git a/redwood-layout-view/src/test/kotlin/app/cash/redwood/layout/view/ViewFlexContainerTest.kt b/redwood-layout-view/src/test/kotlin/app/cash/redwood/layout/view/ViewFlexContainerTest.kt
index 8ba33a5c5f..6423c38057 100644
--- a/redwood-layout-view/src/test/kotlin/app/cash/redwood/layout/view/ViewFlexContainerTest.kt
+++ b/redwood-layout-view/src/test/kotlin/app/cash/redwood/layout/view/ViewFlexContainerTest.kt
@@ -65,7 +65,9 @@ class ViewFlexContainerTest(
 
   class ViewTestFlexContainer internal constructor(
     private val delegate: ViewFlexContainer,
-  ) : TestFlexContainer<View>, FlexContainer<View> by delegate, ChangeListener by delegate {
+  ) : TestFlexContainer<View>,
+    FlexContainer<View> by delegate,
+    ChangeListener by delegate {
     private var childCount = 0
     override val children: ViewGroupChildren = delegate.children
     override fun add(widget: Widget<View>) {
diff --git a/redwood-layout-widget/src/commonMain/kotlin/app/cash/redwood/layout/widget/FlexContainer.kt b/redwood-layout-widget/src/commonMain/kotlin/app/cash/redwood/layout/widget/FlexContainer.kt
index 76a63ee020..ff6d34ea30 100644
--- a/redwood-layout-widget/src/commonMain/kotlin/app/cash/redwood/layout/widget/FlexContainer.kt
+++ b/redwood-layout-widget/src/commonMain/kotlin/app/cash/redwood/layout/widget/FlexContainer.kt
@@ -18,7 +18,9 @@ package app.cash.redwood.layout.widget
 import app.cash.redwood.layout.api.CrossAxisAlignment
 import app.cash.redwood.layout.api.MainAxisAlignment
 
-public interface FlexContainer<W : Any> : Row<W>, Column<W> {
+public interface FlexContainer<W : Any> :
+  Row<W>,
+  Column<W> {
   override fun horizontalAlignment(horizontalAlignment: MainAxisAlignment) {
     mainAxisAlignment(horizontalAlignment)
   }
diff --git a/redwood-lazylayout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiLazyListTest.kt b/redwood-lazylayout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiLazyListTest.kt
index c6dc43c4fc..42284ad000 100644
--- a/redwood-lazylayout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiLazyListTest.kt
+++ b/redwood-lazylayout-composeui/src/androidUnitTest/kotlin/app/cash/redwood/layout/composeui/ComposeUiLazyListTest.kt
@@ -104,7 +104,8 @@ class ComposeUiLazyListTest(
 
   class ComposeTestFlexContainer private constructor(
     private val delegate: ComposeUiLazyList,
-  ) : TestFlexContainer<@Composable () -> Unit>, LazyList<@Composable () -> Unit> by delegate {
+  ) : TestFlexContainer<@Composable () -> Unit>,
+    LazyList<@Composable () -> Unit> by delegate {
     private var childCount = 0
 
     constructor(direction: FlexDirection, backgroundColor: Int) : this(
diff --git a/redwood-lazylayout-composeui/src/commonMain/kotlin/app/cash/redwood/lazylayout/composeui/ComposeUiRedwoodTreehouseLazyLayoutWidgetFactory.kt b/redwood-lazylayout-composeui/src/commonMain/kotlin/app/cash/redwood/lazylayout/composeui/ComposeUiRedwoodTreehouseLazyLayoutWidgetFactory.kt
index f79f65786b..ad3903aa0f 100644
--- a/redwood-lazylayout-composeui/src/commonMain/kotlin/app/cash/redwood/lazylayout/composeui/ComposeUiRedwoodTreehouseLazyLayoutWidgetFactory.kt
+++ b/redwood-lazylayout-composeui/src/commonMain/kotlin/app/cash/redwood/lazylayout/composeui/ComposeUiRedwoodTreehouseLazyLayoutWidgetFactory.kt
@@ -20,8 +20,7 @@ import app.cash.redwood.lazylayout.widget.LazyList
 import app.cash.redwood.lazylayout.widget.RedwoodLazyLayoutWidgetFactory
 import app.cash.redwood.lazylayout.widget.RefreshableLazyList
 
-public class ComposeUiRedwoodLazyLayoutWidgetFactory :
-  RedwoodLazyLayoutWidgetFactory<@Composable () -> Unit> {
+public class ComposeUiRedwoodLazyLayoutWidgetFactory : RedwoodLazyLayoutWidgetFactory<@Composable () -> Unit> {
   override fun LazyList(): LazyList<@Composable () -> Unit> = ComposeUiLazyList()
 
   override fun RefreshableLazyList(): RefreshableLazyList<@Composable () -> Unit> = ComposeUiLazyList()
diff --git a/redwood-lazylayout-dom/src/commonMain/kotlin/app/cash/redwood/lazylayout/dom/HTMLLazyList.kt b/redwood-lazylayout-dom/src/commonMain/kotlin/app/cash/redwood/lazylayout/dom/HTMLLazyList.kt
index 60f28d3f4a..b5e4aa1e3d 100644
--- a/redwood-lazylayout-dom/src/commonMain/kotlin/app/cash/redwood/lazylayout/dom/HTMLLazyList.kt
+++ b/redwood-lazylayout-dom/src/commonMain/kotlin/app/cash/redwood/lazylayout/dom/HTMLLazyList.kt
@@ -162,7 +162,8 @@ internal open class HTMLLazyList(document: Document) : LazyList<HTMLElement> {
 
 internal class HTMLRefreshableLazyList(
   document: Document,
-) : HTMLLazyList(document), RefreshableLazyList<HTMLElement> {
+) : HTMLLazyList(document),
+  RefreshableLazyList<HTMLElement> {
   override fun refreshing(refreshing: Boolean) {
   }
 
diff --git a/redwood-lazylayout-uiview/src/commonMain/kotlin/app/cash/redwood/lazylayout/uiview/UIViewLazyList.kt b/redwood-lazylayout-uiview/src/commonMain/kotlin/app/cash/redwood/lazylayout/uiview/UIViewLazyList.kt
index 5797716358..db46fb1c09 100644
--- a/redwood-lazylayout-uiview/src/commonMain/kotlin/app/cash/redwood/lazylayout/uiview/UIViewLazyList.kt
+++ b/redwood-lazylayout-uiview/src/commonMain/kotlin/app/cash/redwood/lazylayout/uiview/UIViewLazyList.kt
@@ -65,7 +65,9 @@ import platform.UIKit.item
 import platform.darwin.NSInteger
 import platform.darwin.NSObject
 
-internal open class UIViewLazyList : LazyList<UIView>, ChangeListener {
+internal open class UIViewLazyList :
+  LazyList<UIView>,
+  ChangeListener {
   internal val tableView: UITableView = object : UITableView(
     CGRectZero.readValue(),
     UITableViewStyle.UITableViewStylePlain,
@@ -333,7 +335,9 @@ internal class LazyListContainerCell(
   }
 }
 
-internal class UIViewRefreshableLazyList : UIViewLazyList(), RefreshableLazyList<UIView> {
+internal class UIViewRefreshableLazyList :
+  UIViewLazyList(),
+  RefreshableLazyList<UIView> {
 
   private var onRefresh: (() -> Unit)? = null
 
diff --git a/redwood-lazylayout-view/src/main/kotlin/app/cash/redwood/lazylayout/view/ViewLazyList.kt b/redwood-lazylayout-view/src/main/kotlin/app/cash/redwood/lazylayout/view/ViewLazyList.kt
index 2edf3e864d..f7e9acc4ab 100644
--- a/redwood-lazylayout-view/src/main/kotlin/app/cash/redwood/lazylayout/view/ViewLazyList.kt
+++ b/redwood-lazylayout-view/src/main/kotlin/app/cash/redwood/lazylayout/view/ViewLazyList.kt
@@ -53,7 +53,8 @@ private const val VIEW_TYPE_ITEM = 1
 
 internal open class ViewLazyList private constructor(
   internal val recyclerView: RecyclerView,
-) : LazyList<View>, ChangeListener {
+) : LazyList<View>,
+  ChangeListener {
   private val adapter = LazyContentItemListAdapter()
   private val scope = MainScope()
 
@@ -292,7 +293,8 @@ internal open class ViewLazyList private constructor(
 
 internal class ViewRefreshableLazyList(
   context: Context,
-) : ViewLazyList(context), RefreshableLazyList<View> {
+) : ViewLazyList(context),
+  RefreshableLazyList<View> {
 
   private val swipeRefreshLayout = SwipeRefreshLayout(context)
 
diff --git a/redwood-lazylayout-view/src/test/kotlin/app/cash/redwood/lazylayout/view/ViewLazyListTest.kt b/redwood-lazylayout-view/src/test/kotlin/app/cash/redwood/lazylayout/view/ViewLazyListTest.kt
index 47c3ee5c32..bd8cdc229a 100644
--- a/redwood-lazylayout-view/src/test/kotlin/app/cash/redwood/lazylayout/view/ViewLazyListTest.kt
+++ b/redwood-lazylayout-view/src/test/kotlin/app/cash/redwood/lazylayout/view/ViewLazyListTest.kt
@@ -89,7 +89,9 @@ class ViewLazyListTest(
 
   class ViewTestFlexContainer private constructor(
     private val delegate: ViewLazyList,
-  ) : TestFlexContainer<View>, LazyList<View> by delegate, ChangeListener by delegate {
+  ) : TestFlexContainer<View>,
+    LazyList<View> by delegate,
+    ChangeListener by delegate {
     private var childCount = 0
 
     constructor(context: Context, direction: FlexDirection, backgroundColor: Int) : this(
diff --git a/redwood-protocol-guest/src/jsMain/kotlin/app/cash/redwood/protocol/guest/PlatformList.kt b/redwood-protocol-guest/src/jsMain/kotlin/app/cash/redwood/protocol/guest/PlatformList.kt
index e34ce50b4e..731e321e96 100644
--- a/redwood-protocol-guest/src/jsMain/kotlin/app/cash/redwood/protocol/guest/PlatformList.kt
+++ b/redwood-protocol-guest/src/jsMain/kotlin/app/cash/redwood/protocol/guest/PlatformList.kt
@@ -32,7 +32,8 @@ internal actual inline fun <E> PlatformList<E>.asList(): List<E> {
 
 internal class JsArrayList<E>(
   private val storage: JsArray<E>,
-) : AbstractList<E>(), RandomAccess {
+) : AbstractList<E>(),
+  RandomAccess {
   override val size: Int get() = storage.size
 
   override fun get(index: Int): E {
diff --git a/redwood-protocol-host/src/commonMain/kotlin/app/cash/redwood/protocol/host/ProtocolBridge.kt b/redwood-protocol-host/src/commonMain/kotlin/app/cash/redwood/protocol/host/ProtocolBridge.kt
index e3085fed32..40fe8d4ee0 100644
--- a/redwood-protocol-host/src/commonMain/kotlin/app/cash/redwood/protocol/host/ProtocolBridge.kt
+++ b/redwood-protocol-host/src/commonMain/kotlin/app/cash/redwood/protocol/host/ProtocolBridge.kt
@@ -373,7 +373,8 @@ public class ProtocolBridge<W : Any>(
 @OptIn(RedwoodCodegenApi::class)
 private class RootProtocolNode<W : Any>(
   children: Widget.Children<W>,
-) : ProtocolNode<W>(Id.Root, UnknownWidgetTag), Widget<W> {
+) : ProtocolNode<W>(Id.Root, UnknownWidgetTag),
+  Widget<W> {
   private val children = ProtocolChildren(children)
 
   override fun apply(change: PropertyChange, eventSink: EventSink) {
diff --git a/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/ApiCommand.kt b/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/ApiCommand.kt
index 4d5e05d521..978c92caf6 100644
--- a/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/ApiCommand.kt
+++ b/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/ApiCommand.kt
@@ -34,10 +34,11 @@ import com.github.ajalt.clikt.parameters.types.path
 import java.io.File
 import java.net.URLClassLoader
 
-internal class ApiCommand : CliktCommand(
-  name = "api",
-  help = "Write schema protocol API to XML, or validate schema compatibility with existing XML",
-) {
+internal class ApiCommand :
+  CliktCommand(
+    name = "api",
+    help = "Write schema protocol API to XML, or validate schema compatibility with existing XML",
+  ) {
   private val file by option("-f", "--file")
     .path()
     .required()
diff --git a/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/JsonCommand.kt b/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/JsonCommand.kt
index 4539688859..9157988a14 100644
--- a/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/JsonCommand.kt
+++ b/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/JsonCommand.kt
@@ -29,10 +29,11 @@ import java.net.URLClassLoader
 import kotlin.io.path.createDirectories
 import kotlin.io.path.writeText
 
-internal class JsonCommand : CliktCommand(
-  name = "json",
-  help = "Parse schema members into a JSON representation",
-) {
+internal class JsonCommand :
+  CliktCommand(
+    name = "json",
+    help = "Parse schema members into a JSON representation",
+  ) {
   private val out by option().path().required()
     .help("Directory into which JSON is written")
 
diff --git a/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/schemaApi.kt b/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/schemaApi.kt
index eb2048e4bd..6596116206 100644
--- a/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/schemaApi.kt
+++ b/redwood-tooling-schema/src/main/kotlin/app/cash/redwood/tooling/schema/schemaApi.kt
@@ -158,9 +158,15 @@ public interface ProtocolWidget : Widget {
   public sealed interface ProtocolTrait : Trait {
     public val tag: Int
   }
-  public interface ProtocolProperty : Property, ProtocolTrait
-  public interface ProtocolEvent : Event, ProtocolTrait
-  public interface ProtocolChildren : Children, ProtocolTrait
+  public interface ProtocolProperty :
+    Property,
+    ProtocolTrait
+  public interface ProtocolEvent :
+    Event,
+    ProtocolTrait
+  public interface ProtocolChildren :
+    Children,
+    ProtocolTrait
 }
 
 public interface ProtocolModifier : Modifier {
diff --git a/redwood-treehouse-guest/src/commonMain/kotlin/app/cash/redwood/treehouse/treehouseCompose.kt b/redwood-treehouse-guest/src/commonMain/kotlin/app/cash/redwood/treehouse/treehouseCompose.kt
index ad7a63a3e9..a9bceed743 100644
--- a/redwood-treehouse-guest/src/commonMain/kotlin/app/cash/redwood/treehouse/treehouseCompose.kt
+++ b/redwood-treehouse-guest/src/commonMain/kotlin/app/cash/redwood/treehouse/treehouseCompose.kt
@@ -53,7 +53,9 @@ private class RedwoodZiplineTreehouseUi(
   private val appLifecycle: StandardAppLifecycle,
   private val treehouseUi: TreehouseUi,
   private val bridge: ProtocolBridge,
-) : ZiplineTreehouseUi, ZiplineScoped, EventSink by bridge {
+) : ZiplineTreehouseUi,
+  ZiplineScoped,
+  EventSink by bridge {
 
   /**
    * By overriding [ZiplineScoped.scope], all services passed into [start] are added to this scope,
diff --git a/redwood-treehouse-host/src/androidMain/kotlin/app/cash/redwood/treehouse/TreehouseLayout.kt b/redwood-treehouse-host/src/androidMain/kotlin/app/cash/redwood/treehouse/TreehouseLayout.kt
index 08365b3d2f..b5980011a7 100644
--- a/redwood-treehouse-host/src/androidMain/kotlin/app/cash/redwood/treehouse/TreehouseLayout.kt
+++ b/redwood-treehouse-host/src/androidMain/kotlin/app/cash/redwood/treehouse/TreehouseLayout.kt
@@ -33,7 +33,8 @@ public class TreehouseLayout(
   context: Context,
   override val widgetSystem: WidgetSystem<View>,
   androidOnBackPressedDispatcher: AndroidOnBackPressedDispatcher,
-) : RedwoodLayout(context, androidOnBackPressedDispatcher), TreehouseView<View> {
+) : RedwoodLayout(context, androidOnBackPressedDispatcher),
+  TreehouseView<View> {
   override var readyForContentChangeListener: ReadyForContentChangeListener<View>? = null
     set(value) {
       check(value == null || field == null) { "View already bound to a listener" }
diff --git a/redwood-treehouse-host/src/appsJvmTest/kotlin/app/cash/redwood/treehouse/RetainEverythingEventListenerFactory.kt b/redwood-treehouse-host/src/appsJvmTest/kotlin/app/cash/redwood/treehouse/RetainEverythingEventListenerFactory.kt
index 2dd3fb4260..32234ebd9e 100644
--- a/redwood-treehouse-host/src/appsJvmTest/kotlin/app/cash/redwood/treehouse/RetainEverythingEventListenerFactory.kt
+++ b/redwood-treehouse-host/src/appsJvmTest/kotlin/app/cash/redwood/treehouse/RetainEverythingEventListenerFactory.kt
@@ -24,7 +24,8 @@ import app.cash.zipline.ZiplineManifest
  */
 class RetainEverythingEventListenerFactory(
   private val eventLog: EventLog,
-) : EventListener(), EventListener.Factory {
+) : EventListener(),
+  EventListener.Factory {
   var app: TreehouseApp<*>? = null
   var manifestUrl: String? = null
   var zipline: Zipline? = null
diff --git a/redwood-treehouse-host/src/commonMain/kotlin/app/cash/redwood/treehouse/TreehouseAppContent.kt b/redwood-treehouse-host/src/commonMain/kotlin/app/cash/redwood/treehouse/TreehouseAppContent.kt
index dc1d606971..6dac22327a 100644
--- a/redwood-treehouse-host/src/commonMain/kotlin/app/cash/redwood/treehouse/TreehouseAppContent.kt
+++ b/redwood-treehouse-host/src/commonMain/kotlin/app/cash/redwood/treehouse/TreehouseAppContent.kt
@@ -82,7 +82,9 @@ internal class TreehouseAppContent<A : AppService>(
   private val dispatchers: TreehouseDispatchers,
   private val codeEventPublisher: CodeEventPublisher,
   private val source: TreehouseContentSource<A>,
-) : Content, CodeHost.Listener<A>, CodeSession.Listener<A> {
+) : Content,
+  CodeHost.Listener<A>,
+  CodeSession.Listener<A> {
   private val stateFlow = MutableStateFlow<State<A>>(
     State(ViewState.None, CodeState.Idle(isInitialLaunch = true)),
   )
@@ -303,7 +305,9 @@ private class ViewContentCodeBinding<A : AppService>(
   private val isInitialLaunch: Boolean,
   private val onBackPressedDispatcher: OnBackPressedDispatcher,
   firstUiConfiguration: StateFlow<UiConfiguration>,
-) : ChangesSinkService, TreehouseView.SaveCallback, ZiplineTreehouseUi.Host {
+) : ChangesSinkService,
+  TreehouseView.SaveCallback,
+  ZiplineTreehouseUi.Host {
   private val uiConfigurationFlow = SequentialStateFlow(firstUiConfiguration)
 
   private val bindingScope = CoroutineScope(
diff --git a/redwood-treehouse-host/src/iosMain/kotlin/app/cash/redwood/treehouse/TreehouseUIView.kt b/redwood-treehouse-host/src/iosMain/kotlin/app/cash/redwood/treehouse/TreehouseUIView.kt
index 4edd59343e..2be057dff9 100644
--- a/redwood-treehouse-host/src/iosMain/kotlin/app/cash/redwood/treehouse/TreehouseUIView.kt
+++ b/redwood-treehouse-host/src/iosMain/kotlin/app/cash/redwood/treehouse/TreehouseUIView.kt
@@ -31,7 +31,8 @@ import platform.UIKit.UIView
 public class TreehouseUIView private constructor(
   override val widgetSystem: WidgetSystem<UIView>,
   view: RootUiView,
-) : TreehouseView<UIView>, RedwoodUIView(view) {
+) : RedwoodUIView(view),
+  TreehouseView<UIView> {
   override var saveCallback: TreehouseView.SaveCallback? = null
   override var stateSnapshotId: StateSnapshot.Id = StateSnapshot.Id(null)
 
diff --git a/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/CancellableService.kt b/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/CancellableService.kt
index f9831a5cac..87e316c5d3 100644
--- a/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/CancellableService.kt
+++ b/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/CancellableService.kt
@@ -21,4 +21,6 @@ import kotlin.native.ObjCName
 
 /** Redwood's [Cancellable] but implementing [ZiplineService]. */
 @ObjCName("CancellableService", exact = true)
-public interface CancellableService : ZiplineService, Cancellable
+public interface CancellableService :
+  ZiplineService,
+  Cancellable
diff --git a/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ChangesSinkService.kt b/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ChangesSinkService.kt
index d3656a071f..2600999a74 100644
--- a/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ChangesSinkService.kt
+++ b/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ChangesSinkService.kt
@@ -21,4 +21,6 @@ import kotlin.native.ObjCName
 
 /** Redwood's [ChangesSink] but implementing [ZiplineService]. */
 @ObjCName("ChangesSinkService", exact = true)
-public interface ChangesSinkService : ZiplineService, ChangesSink
+public interface ChangesSinkService :
+  ZiplineService,
+  ChangesSink
diff --git a/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ZiplineTreehouseUi.kt b/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ZiplineTreehouseUi.kt
index a5d6f9bdbe..746dbff881 100644
--- a/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ZiplineTreehouseUi.kt
+++ b/redwood-treehouse/src/commonMain/kotlin/app/cash/redwood/treehouse/ZiplineTreehouseUi.kt
@@ -27,7 +27,9 @@ import kotlinx.coroutines.flow.StateFlow
  * Most callers shouldn't use this directly; instead use `TreehouseUi`.
  */
 @ObjCName("ZiplineTreehouseUi", exact = true)
-public interface ZiplineTreehouseUi : ZiplineService, EventSink {
+public interface ZiplineTreehouseUi :
+  ZiplineService,
+  EventSink {
   public fun start(host: Host)
 
   @Deprecated("Use `start` method that takes in a Host")
@@ -51,7 +53,9 @@ public interface ZiplineTreehouseUi : ZiplineService, EventSink {
   public fun snapshotState(): StateSnapshot? = null
 
   /** Access to the host that presents this UI. */
-  public interface Host : ZiplineService, ChangesSinkService {
+  public interface Host :
+    ZiplineService,
+    ChangesSinkService {
     public val uiConfigurations: StateFlow<UiConfiguration>
     public val stateSnapshot: StateSnapshot?
 
diff --git a/redwood-widget/src/androidMain/kotlin/app/cash/redwood/widget/RedwoodLayout.kt b/redwood-widget/src/androidMain/kotlin/app/cash/redwood/widget/RedwoodLayout.kt
index 3ce6ce7e15..1e8984108c 100644
--- a/redwood-widget/src/androidMain/kotlin/app/cash/redwood/widget/RedwoodLayout.kt
+++ b/redwood-widget/src/androidMain/kotlin/app/cash/redwood/widget/RedwoodLayout.kt
@@ -37,7 +37,8 @@ import kotlinx.coroutines.flow.StateFlow
 public open class RedwoodLayout(
   context: Context,
   androidOnBackPressedDispatcher: AndroidOnBackPressedDispatcher,
-) : FrameLayout(context), RedwoodView<View> {
+) : FrameLayout(context),
+  RedwoodView<View> {
   init {
     // The view needs to have an ID to participate in instance state saving.
     id = R.id.redwood_layout
diff --git a/redwood-widget/src/commonMain/kotlin/app/cash/redwood/widget/MutableListChildren.kt b/redwood-widget/src/commonMain/kotlin/app/cash/redwood/widget/MutableListChildren.kt
index 64854783e9..8fce15011f 100644
--- a/redwood-widget/src/commonMain/kotlin/app/cash/redwood/widget/MutableListChildren.kt
+++ b/redwood-widget/src/commonMain/kotlin/app/cash/redwood/widget/MutableListChildren.kt
@@ -26,7 +26,8 @@ import kotlin.native.ObjCName
 public class MutableListChildren<W : Any>(
   private val container: MutableList<Widget<W>> = mutableListOf(),
   private val modifierUpdated: () -> Unit = {},
-) : Widget.Children<W>, MutableList<Widget<W>> by container {
+) : Widget.Children<W>,
+  MutableList<Widget<W>> by container {
   override val widgets: MutableList<Widget<W>> get() = container
 
   override fun insert(index: Int, widget: Widget<W>) {
diff --git a/samples/emoji-search/android-composeui/src/main/kotlin/com/example/redwood/emojisearch/android/composeui/RealHostApi.kt b/samples/emoji-search/android-composeui/src/main/kotlin/com/example/redwood/emojisearch/android/composeui/RealHostApi.kt
index 8939af8b4d..d90edbe22b 100644
--- a/samples/emoji-search/android-composeui/src/main/kotlin/com/example/redwood/emojisearch/android/composeui/RealHostApi.kt
+++ b/samples/emoji-search/android-composeui/src/main/kotlin/com/example/redwood/emojisearch/android/composeui/RealHostApi.kt
@@ -28,8 +28,7 @@ import okhttp3.Response
 import okio.IOException
 
 /** Exception for an unexpected, non-2xx HTTP response. */
-class HttpException(response: Response) :
-  RuntimeException("HTTP ${response.code} ${response.message}")
+class HttpException(response: Response) : RuntimeException("HTTP ${response.code} ${response.message}")
 
 class RealHostApi(
   private val client: OkHttpClient,
diff --git a/samples/emoji-search/android-views/src/main/kotlin/com/example/redwood/emojisearch/android/views/RealHostApi.kt b/samples/emoji-search/android-views/src/main/kotlin/com/example/redwood/emojisearch/android/views/RealHostApi.kt
index 036bcd9794..22792cfd02 100644
--- a/samples/emoji-search/android-views/src/main/kotlin/com/example/redwood/emojisearch/android/views/RealHostApi.kt
+++ b/samples/emoji-search/android-views/src/main/kotlin/com/example/redwood/emojisearch/android/views/RealHostApi.kt
@@ -32,8 +32,7 @@ import okhttp3.Response
 import okio.IOException
 
 /** Exception for an unexpected, non-2xx HTTP response. */
-class HttpException(response: Response) :
-  RuntimeException("HTTP ${response.code} ${response.message}")
+class HttpException(response: Response) : RuntimeException("HTTP ${response.code} ${response.message}")
 
 class RealHostApi(
   private val context: Context,
diff --git a/samples/emoji-search/desktop-composeui/src/main/kotlin/com/example/redwood/emojisearch/desktop/JvmHttpClient.kt b/samples/emoji-search/desktop-composeui/src/main/kotlin/com/example/redwood/emojisearch/desktop/JvmHttpClient.kt
index 0fa49cd06f..1c61d13cea 100644
--- a/samples/emoji-search/desktop-composeui/src/main/kotlin/com/example/redwood/emojisearch/desktop/JvmHttpClient.kt
+++ b/samples/emoji-search/desktop-composeui/src/main/kotlin/com/example/redwood/emojisearch/desktop/JvmHttpClient.kt
@@ -54,7 +54,8 @@ private suspend fun Call.await(): Response {
 private class ContinuationCallback(
   private val call: Call,
   private val continuation: CancellableContinuation<Response>,
-) : Callback, CompletionHandler {
+) : Callback,
+  CompletionHandler {
 
   override fun onResponse(call: Call, response: Response) {
     continuation.resume(response)
diff --git a/samples/emoji-search/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/emojisearch/treehouse/EmojiSearchPresenter.kt b/samples/emoji-search/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/emojisearch/treehouse/EmojiSearchPresenter.kt
index df362be117..c7fde19692 100644
--- a/samples/emoji-search/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/emojisearch/treehouse/EmojiSearchPresenter.kt
+++ b/samples/emoji-search/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/emojisearch/treehouse/EmojiSearchPresenter.kt
@@ -21,6 +21,8 @@ import app.cash.zipline.ZiplineService
 import kotlin.native.ObjCName
 
 @ObjCName("EmojiSearchPresenter", exact = true)
-interface EmojiSearchPresenter : AppService, ZiplineService {
+interface EmojiSearchPresenter :
+  AppService,
+  ZiplineService {
   fun launch(): ZiplineTreehouseUi
 }
diff --git a/test-app/android-views/src/main/kotlin/com/example/redwood/testapp/android/views/RealHostApi.kt b/test-app/android-views/src/main/kotlin/com/example/redwood/testapp/android/views/RealHostApi.kt
index 555e601452..36e35bd491 100644
--- a/test-app/android-views/src/main/kotlin/com/example/redwood/testapp/android/views/RealHostApi.kt
+++ b/test-app/android-views/src/main/kotlin/com/example/redwood/testapp/android/views/RealHostApi.kt
@@ -28,8 +28,7 @@ import okhttp3.Response
 import okio.IOException
 
 /** Exception for an unexpected, non-2xx HTTP response. */
-class HttpException(response: Response) :
-  RuntimeException("HTTP ${response.code} ${response.message}")
+class HttpException(response: Response) : RuntimeException("HTTP ${response.code} ${response.message}")
 
 class RealHostApi(
   private val client: OkHttpClient,
diff --git a/test-app/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/testapp/treehouse/TestAppPresenter.kt b/test-app/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/testapp/treehouse/TestAppPresenter.kt
index 4f4b45bc00..c6fc329a84 100644
--- a/test-app/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/testapp/treehouse/TestAppPresenter.kt
+++ b/test-app/presenter-treehouse/src/commonMain/kotlin/com/example/redwood/testapp/treehouse/TestAppPresenter.kt
@@ -21,7 +21,9 @@ import app.cash.zipline.ZiplineService
 import kotlin.native.ObjCName
 
 @ObjCName("TestAppPresenter", exact = true)
-interface TestAppPresenter : AppService, ZiplineService {
+interface TestAppPresenter :
+  AppService,
+  ZiplineService {
   fun launchForApp(): ZiplineTreehouseUi
   fun launchForTester(): ZiplineTreehouseUi
 }