diff --git a/pom.xml b/pom.xml
index 9a8ed0d..dc14c90 100644
--- a/pom.xml
+++ b/pom.xml
@@ -74,7 +74,7 @@
         <dependency>
             <groupId>org.openautonomousconnection</groupId>
             <artifactId>LuaScript</artifactId>
-            <version>1.0.0-BETA.1.3</version>
+            <version>0.0.0-STABLE.1.3</version>
         </dependency>
         <dependency>
             <groupId>org.openautonomousconnection</groupId>
diff --git a/src/main/java/org/openautonomousconnection/webclient/lua/hosts/UiHostImpl.java b/src/main/java/org/openautonomousconnection/webclient/lua/hosts/UiHostImpl.java
index 4c7772b..3913ec2 100644
--- a/src/main/java/org/openautonomousconnection/webclient/lua/hosts/UiHostImpl.java
+++ b/src/main/java/org/openautonomousconnection/webclient/lua/hosts/UiHostImpl.java
@@ -5,8 +5,11 @@ import javafx.scene.web.WebView;
 import org.openautonomousconnection.luascript.fx.FxDomHost;
 import org.openautonomousconnection.luascript.fx.FxThreadBridge;
 import org.openautonomousconnection.luascript.hosts.UiHost;
+import org.openautonomousconnection.oacswing.component.OACOptionPane;
+import org.openautonomousconnection.webclient.Main;
 import org.w3c.dom.Element;
 
+import javax.swing.*;
 import java.util.Objects;
 
 /**
@@ -66,23 +69,17 @@ public final class UiHostImpl implements UiHost {
 
     @Override
     public void alert(String message) {
-        // No JS: use simple JavaFX dialog-less fallback (log-style). You can replace with real Dialogs later.
-        // Keeping it deterministic and non-blocking for now.
-        System.out.println("[ui.alert] " + (message == null ? "" : message));
+        OACOptionPane.showMessageDialog(Main.getUi(), message, "Alert", JOptionPane.INFORMATION_MESSAGE);
     }
 
     @Override
     public boolean confirm(String message) {
-        // No JS: deterministic default (false). Replace with JavaFX dialogs if you want UI interaction.
-        System.out.println("[ui.confirm] " + (message == null ? "" : message));
-        return false;
+        return OACOptionPane.showConfirmDialog(Main.getUi(), message, "Alert", OACOptionPane.YES_NO_OPTION) == OACOptionPane.YES_OPTION;
     }
 
     @Override
     public String prompt(String message, String defaultValue) {
-        // No JS: deterministic default.
-        System.out.println("[ui.prompt] " + (message == null ? "" : message));
-        return defaultValue;
+        return (String) OACOptionPane.showInputDialog(Main.getUi(), message, "Prompt", JOptionPane.QUESTION_MESSAGE, null, null, defaultValue);
     }
 
     @Override
diff --git a/src/main/java/org/openautonomousconnection/webclient/settings/AppSettings.java b/src/main/java/org/openautonomousconnection/webclient/settings/AppSettings.java
index 0bf6bf2..2e52778 100644
--- a/src/main/java/org/openautonomousconnection/webclient/settings/AppSettings.java
+++ b/src/main/java/org/openautonomousconnection/webclient/settings/AppSettings.java
@@ -2,7 +2,6 @@ package org.openautonomousconnection.webclient.settings;
 
 import org.openautonomousconnection.luascript.security.LuaExecutionPolicy;
 
-import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -187,6 +186,6 @@ public final class AppSettings {
      * Resets the Lua policy back to ui default.
      */
     public void resetLuaPolicyToUiDefault() {
-        this.luaPolicy = new LuaExecutionPolicy(Duration.ofMillis(50L), 200_000L, 5_000);
+        this.luaPolicy = LuaExecutionPolicy.uiDefault();
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/org/openautonomousconnection/webclient/settings/FxEngine.java b/src/main/java/org/openautonomousconnection/webclient/settings/FxEngine.java
index ab45999..1f34ec6 100644
--- a/src/main/java/org/openautonomousconnection/webclient/settings/FxEngine.java
+++ b/src/main/java/org/openautonomousconnection/webclient/settings/FxEngine.java
@@ -4,6 +4,7 @@ import javafx.concurrent.Worker;
 import javafx.scene.web.WebEngine;
 import javafx.scene.web.WebView;
 import org.luaj.vm2.Globals;
+import org.luaj.vm2.LuaError;
 import org.openautonomousconnection.luascript.fx.FxDomHost;
 import org.openautonomousconnection.luascript.fx.FxEventHost;
 import org.openautonomousconnection.luascript.fx.FxWebViewResourceHost;
@@ -11,6 +12,8 @@ import org.openautonomousconnection.luascript.hosts.HostServices;
 import org.openautonomousconnection.luascript.runtime.LuaRuntime;
 import org.openautonomousconnection.luascript.security.LuaExecutionPolicy;
 import org.openautonomousconnection.luascript.utils.LuaGlobalsFactory;
+import org.openautonomousconnection.oacswing.component.OACOptionPane;
+import org.openautonomousconnection.webclient.Main;
 import org.openautonomousconnection.webclient.lua.WebLogger;
 import org.openautonomousconnection.webclient.lua.hosts.ConsoleHostImpl;
 import org.openautonomousconnection.webclient.lua.hosts.UiHostImpl;
@@ -95,17 +98,19 @@ public final class FxEngine implements AutoCloseable {
         ConsoleHostImpl console = new ConsoleHostImpl(logger);
         UiHostImpl uiHost = new UiHostImpl(engine, webView, dom);
         FxWebViewResourceHost resourceHost = new FxWebViewResourceHost(engine);
-
-        LuaRuntime rt = new LuaRuntime(globals, new HostServices.Default(uiHost, dom, null, resourceHost, console), policy);
-
-        FxEventHost eventHost = new FxEventHost(dom, rt.eventRouter());
+        FxEventHost eventHost = new FxEventHost(dom);
         HostServices services = new HostServices.Default(uiHost, dom, eventHost, resourceHost, console);
-
-        rt.close();
-        rt = new LuaRuntime(globals, services, policy);
+        LuaRuntime rt = new LuaRuntime(globals, services, policy);
+        eventHost.setRouter(rt.eventRouter());
 
         rt.installStdTables(true);
-        rt.bootstrapFromDom();
+
+        try {
+            rt.bootstrapFromDom();
+        } catch (LuaError error) {
+            Main.getLogger().exception("Failed to start script", error);
+            OACOptionPane.showMessageDialog(Main.getUi(), error.getMessage(), "Script", OACOptionPane.ERROR_MESSAGE);
+        }
 
         this.runtime = rt;
     }
@@ -135,4 +140,4 @@ public final class FxEngine implements AutoCloseable {
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/org/openautonomousconnection/webclient/settings/SettingsManager.java b/src/main/java/org/openautonomousconnection/webclient/settings/SettingsManager.java
index 8da1cfc..e63d4a1 100644
--- a/src/main/java/org/openautonomousconnection/webclient/settings/SettingsManager.java
+++ b/src/main/java/org/openautonomousconnection/webclient/settings/SettingsManager.java
@@ -87,9 +87,10 @@ public final class SettingsManager {
         }
 
         // Lua policy
-        long timeoutMs = parseLong(p.getProperty("lua.timeoutMs"), 50L);
-        long instr = parseLong(p.getProperty("lua.instructionLimit"), 200_000L);
-        int hook = parseInt(p.getProperty("lua.hookStep"), 5_000);
+        LuaExecutionPolicy defaultPolicy = LuaExecutionPolicy.uiDefault();
+        long timeoutMs = parseLong(p.getProperty("lua.timeoutMs"), defaultPolicy.timeout().toMillis());
+        long instr = parseLong(p.getProperty("lua.instructionLimit"), defaultPolicy.instructionLimit());
+        int hook = parseInt(p.getProperty("lua.hookStep"), defaultPolicy.hookStep());
         try {
             s.setLuaPolicy(new LuaExecutionPolicy(Duration.ofMillis(timeoutMs), instr, hook));
         } catch (Exception ignored) {
@@ -187,4 +188,4 @@ public final class SettingsManager {
             return def;
         }
     }
-}
\ No newline at end of file
+}