diff --git a/redwood-treehouse-host/api/android/redwood-treehouse-host.api b/redwood-treehouse-host/api/android/redwood-treehouse-host.api
index 1574c2bed6..b20a56c44f 100644
--- a/redwood-treehouse-host/api/android/redwood-treehouse-host.api
+++ b/redwood-treehouse-host/api/android/redwood-treehouse-host.api
@@ -85,7 +85,7 @@ public final class app/cash/redwood/treehouse/TreehouseApp {
 	public static synthetic fun createContent$default (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/CodeListener;ILjava/lang/Object;)Lapp/cash/redwood/treehouse/Content;
 	public final fun getDispatchers ()Lapp/cash/redwood/treehouse/TreehouseDispatchers;
 	public final fun getSpec ()Lapp/cash/redwood/treehouse/TreehouseApp$Spec;
-	public final fun getZipline ()Lapp/cash/zipline/Zipline;
+	public final fun getZipline ()Lkotlinx/coroutines/flow/StateFlow;
 	public final fun restart ()V
 	public final fun start ()V
 	public final fun stop ()V
diff --git a/redwood-treehouse-host/api/jvm/redwood-treehouse-host.api b/redwood-treehouse-host/api/jvm/redwood-treehouse-host.api
index 515a5100a4..58ffae507c 100644
--- a/redwood-treehouse-host/api/jvm/redwood-treehouse-host.api
+++ b/redwood-treehouse-host/api/jvm/redwood-treehouse-host.api
@@ -85,7 +85,7 @@ public final class app/cash/redwood/treehouse/TreehouseApp {
 	public static synthetic fun createContent$default (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/CodeListener;ILjava/lang/Object;)Lapp/cash/redwood/treehouse/Content;
 	public final fun getDispatchers ()Lapp/cash/redwood/treehouse/TreehouseDispatchers;
 	public final fun getSpec ()Lapp/cash/redwood/treehouse/TreehouseApp$Spec;
-	public final fun getZipline ()Lapp/cash/zipline/Zipline;
+	public final fun getZipline ()Lkotlinx/coroutines/flow/StateFlow;
 	public final fun restart ()V
 	public final fun start ()V
 	public final fun stop ()V
diff --git a/redwood-treehouse-host/api/redwood-treehouse-host.klib.api b/redwood-treehouse-host/api/redwood-treehouse-host.klib.api
index 8159cc0b0d..648b7bdf44 100644
--- a/redwood-treehouse-host/api/redwood-treehouse-host.klib.api
+++ b/redwood-treehouse-host/api/redwood-treehouse-host.klib.api
@@ -83,7 +83,7 @@ final class <#A: app.cash.redwood.treehouse/AppService> app.cash.redwood.treehou
     final val spec // app.cash.redwood.treehouse/TreehouseApp.spec|{}spec[0]
         final fun <get-spec>(): app.cash.redwood.treehouse/TreehouseApp.Spec<#A> // app.cash.redwood.treehouse/TreehouseApp.spec.<get-spec>|<get-spec>(){}[0]
     final val zipline // app.cash.redwood.treehouse/TreehouseApp.zipline|{}zipline[0]
-        final fun <get-zipline>(): app.cash.zipline/Zipline? // app.cash.redwood.treehouse/TreehouseApp.zipline.<get-zipline>|<get-zipline>(){}[0]
+        final fun <get-zipline>(): kotlinx.coroutines.flow/StateFlow<app.cash.zipline/Zipline?> // app.cash.redwood.treehouse/TreehouseApp.zipline.<get-zipline>|<get-zipline>(){}[0]
 }
 final class <#A: kotlin/Any> app.cash.redwood.treehouse/ChangeListRenderer { // app.cash.redwood.treehouse/ChangeListRenderer|null[0]
     constructor <init>(kotlinx.serialization.json/Json) // app.cash.redwood.treehouse/ChangeListRenderer.<init>|<init>(kotlinx.serialization.json.Json){}[0]