diff --git a/pom.xml b/pom.xml
index 14506fa..ffef229 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.openautonomousconnection</groupId>
     <artifactId>LuaScript</artifactId>
-    <version>1.0.0-BETA.1.4</version>
+    <version>1.0.0-BETA.1.5</version>
 
     <organization>
         <name>Open Autonomous Connection</name>
diff --git a/src/main/java/org/openautonomousconnection/luascript/hosts/ConsoleHost.java b/src/main/java/org/openautonomousconnection/luascript/hosts/ConsoleHost.java
index 10493b9..0589ea1 100644
--- a/src/main/java/org/openautonomousconnection/luascript/hosts/ConsoleHost.java
+++ b/src/main/java/org/openautonomousconnection/luascript/hosts/ConsoleHost.java
@@ -1,31 +1,42 @@
 package org.openautonomousconnection.luascript.hosts;
 
 /**
- * Host capability for console logging.
+ * Abstraction for script console output.
  */
 public interface ConsoleHost {
+
     /**
+     * Info log.
+     *
      * @param message message
      */
     void info(String message);
 
     /**
+     * Standard log.
+     *
      * @param message message
      */
     void log(String message);
 
     /**
+     * Warning log.
+     *
      * @param message message
      */
     void warn(String message);
 
     /**
+     * Error-like stacktrace print.
+     *
      * @param message message
      */
     void error(String message);
 
     /**
+     * Exception-like print.
+     *
      * @param message message
      */
     void exception(String message);
-}
+}
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/hosts/DomHost.java b/src/main/java/org/openautonomousconnection/luascript/hosts/DomHost.java
index 6bd591f..3d181e3 100644
--- a/src/main/java/org/openautonomousconnection/luascript/hosts/DomHost.java
+++ b/src/main/java/org/openautonomousconnection/luascript/hosts/DomHost.java
@@ -4,79 +4,79 @@ import java.util.List;
 import java.util.Map;
 
 /**
- * Host capability that exposes a DOM-like API.
+ * Abstraction over DOM access for scripting.
  *
- * <p>Element identity is the (stable) element id.</p>
+ * <p>All element references are by stable element {@code id}.</p>
  */
 public interface DomHost {
 
     /**
-     * Returns all element ids known to the renderer (must be stable).
+     * Returns a list of all element ids in the document.
      *
-     * @return list of element ids
+     * @return list of ids (never null)
      */
     List<String> getAllElementIds();
 
     /**
-     * Returns all attributes for the given element id.
+     * Returns all attributes of the element.
      *
      * @param elementId element id
-     * @return attributes map (attributeName -> attributeValue)
+     * @return attributes map (never null)
      */
     Map<String, String> getAttributes(String elementId);
 
     /**
-     * Returns the tag name of the element (lowercase recommended), e.g. "script", "button".
+     * Returns the element tag name, lowercase if possible.
      *
      * @param elementId element id
-     * @return tag name
+     * @return tag name (never null)
      */
     String getTagName(String elementId);
 
     /**
-     * Returns the text content of an element
+     * Returns the element text content.
      *
      * @param elementId element id
-     * @return text content (never null)
+     * @return text (never null)
      */
     String getTextContent(String elementId);
 
     /**
-     * Sets the text content of an element.
+     * Sets the element text content.
      *
      * @param elementId element id
-     * @param text      text
+     * @param text new text
      */
     void setTextContent(String elementId, String text);
 
     /**
-     * Gets a single attribute or null if missing.
+     * Returns an attribute value or null if missing.
      *
      * @param elementId element id
-     * @param name      attribute name
-     * @return value or null
+     * @param name attribute name
+     * @return value or null if missing
      */
     String getAttribute(String elementId, String name);
 
     /**
-     * Sets an attribute (creates it if missing).
+     * Sets an attribute value (empty string allowed).
      *
      * @param elementId element id
-     * @param name      attribute name
-     * @param value     attribute value
+     * @param name attribute name
+     * @param value attribute value
      */
     void setAttribute(String elementId, String name, String value);
 
     /**
-     * Removes an attribute.
+     * Removes an attribute from the element.
      *
      * @param elementId element id
-     * @param name      attribute name
+     * @param name attribute name
      */
     void removeAttribute(String elementId, String name);
 
     /**
-     * Returns parent id or null.
+     * Returns the parent element id or null if none.
      *
      * @param elementId element id
      * @return parent id or null
@@ -84,48 +84,48 @@ public interface DomHost {
     String getParentId(String elementId);
 
     /**
-     * Returns direct children ids.
+     * Returns children element ids.
      *
      * @param elementId element id
-     * @return children ids
+     * @return list of children ids (never null)
      */
     List<String> getChildrenIds(String elementId);
 
     /**
-     * Creates a new element (detached) and returns its id.
+     * Creates an element and makes it addressable immediately.
      *
-     * @param tagName     tag name
-     * @param requestedId optional requested id, may be null/blank for auto id
+     * @param tagName tag name
+     * @param requestedId requested id or null
      * @return created element id
      */
     String createElement(String tagName, String requestedId);
 
     /**
-     * Removes an element from the DOM.
+     * Removes an element from the document.
      *
      * @param elementId element id
      */
     void removeElement(String elementId);
 
     /**
-     * Moves/appends child under parent.
+     * Appends a child element to a parent.
      *
      * @param parentId parent id
-     * @param childId  child id
+     * @param childId child id
      */
     void appendChild(String parentId, String childId);
 
     /**
-     * Inserts child before an existing direct child.
+     * Inserts {@code childId} before {@code beforeChildId} within {@code parentId}.
      *
-     * @param parentId      parent id
-     * @param childId       child id
+     * @param parentId parent id
+     * @param childId child id
      * @param beforeChildId existing child id
      */
     void insertBefore(String parentId, String childId, String beforeChildId);
 
     /**
-     * Checks if an element id exists.
+     * Checks if an element with the given id exists.
      *
      * @param id element id
      * @return true if exists
@@ -133,18 +133,18 @@ public interface DomHost {
     boolean exists(String id);
 
     /**
-     * Returns element ids by tag.
+     * Queries elements by tag name and returns their ids.
      *
-     * @param tagName tag
-     * @return ids
+     * @param tagName tag name
+     * @return list of ids (never null)
      */
     List<String> queryByTag(String tagName);
 
     /**
-     * Returns element ids by class.
+     * Queries elements by class token and returns their ids.
      *
-     * @param className class
-     * @return ids
+     * @param className class name token
+     * @return list of ids (never null)
      */
     List<String> queryByClass(String className);
 }
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/hosts/EventHost.java b/src/main/java/org/openautonomousconnection/luascript/hosts/EventHost.java
index e2c65a8..c275464 100644
--- a/src/main/java/org/openautonomousconnection/luascript/hosts/EventHost.java
+++ b/src/main/java/org/openautonomousconnection/luascript/hosts/EventHost.java
@@ -1,37 +1,41 @@
 package org.openautonomousconnection.luascript.hosts;
 
+import java.util.Map;
+
 /**
- * Event subscription abstraction (implemented by the client UI layer).
+ * Abstraction over DOM event subscription for scripting.
+ *
+ * <p>Implementations forward DOM events into a {@code LuaEventRouter}.</p>
  */
 public interface EventHost {
 
     /**
-     * Subscribes to an element event.
+     * Adds a listener for an element's event.
      *
      * @param elementId element id
-     * @param eventName event name (e.g. click)
+     * @param eventName normalized event name
      */
     void addListener(String elementId, String eventName);
 
     /**
-     * Unsubscribes from an element event.
+     * Removes a listener for an element's event.
      *
      * @param elementId element id
-     * @param eventName event name
+     * @param eventName normalized event name
      */
     void removeListener(String elementId, String eventName);
 
     /**
-     * Subscribes to a global event (app/window scope).
+     * Adds a global (document-level) listener.
      *
-     * @param eventName event name
+     * @param eventName normalized event name
      */
     void addGlobalListener(String eventName);
 
     /**
-     * Unsubscribes from a global event.
+     * Removes a global (document-level) listener.
      *
-     * @param eventName event name
+     * @param eventName normalized event name
      */
     void removeGlobalListener(String eventName);
-}
+}
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/hosts/HostServices.java b/src/main/java/org/openautonomousconnection/luascript/hosts/HostServices.java
index da1b43d..d7e6b33 100644
--- a/src/main/java/org/openautonomousconnection/luascript/hosts/HostServices.java
+++ b/src/main/java/org/openautonomousconnection/luascript/hosts/HostServices.java
@@ -1,165 +1,145 @@
 package org.openautonomousconnection.luascript.hosts;
 
-import javafx.scene.web.WebEngine;
-import org.openautonomousconnection.luascript.fx.FxDomHost;
-import org.openautonomousconnection.luascript.fx.FxEventHost;
-import org.openautonomousconnection.luascript.fx.FxUiHost;
-import org.openautonomousconnection.luascript.fx.FxWebViewResourceHost;
-import org.openautonomousconnection.luascript.runtime.LuaRuntime;
-
 import java.util.Objects;
 import java.util.Optional;
 
 /**
- * Service container holding optional host capabilities.
+ * Container for host-side services exposed to Lua.
  *
- * <p>This avoids one huge "bridge" interface.</p>
+ * <p>All services are optional to allow different embedding scenarios.</p>
  */
-public final class HostServices {
-
-    private final ConsoleHost console;
-    private final DomHost dom;
-    private final EventHost events;
-    private final ResourceHost resources;
-    private final UiHost ui;
-
-    private HostServices(Builder b) {
-        this.console = b.console;
-        this.ui = b.ui;
-        this.dom = b.dom;
-        this.events = b.events;
-        this.resources = b.resources;
-    }
+public interface HostServices {
 
     /**
-     * Builds a JavaFX WebView preset of HostServices (DOM + events + resources + UI).
+     * Returns an optional UI host.
      *
-     * <p>Important: This method creates the {@link EventHost} using the provided {@link LuaRuntime}'s
-     * {@link org.openautonomousconnection.luascript.runtime.LuaEventRouter}. Therefore, the runtime must already
-     * be constructed before calling this method.</p>
+     * @return ui host
+     */
+    Optional<UiHost> ui();
+
+    /**
+     * Returns an optional DOM host.
      *
-     * <p>Note: You should call {@link FxDomHost#ensureAllElementsHaveId()} after the WebEngine finished loading.</p>
+     * @return dom host
+     */
+    Optional<DomHost> dom();
+
+    /**
+     * Returns an optional event host.
      *
-     * @param engine  JavaFX WebEngine
-     * @param runtime Lua runtime used for event routing
-     * @param console optional console host (may be null)
-     * @return HostServices preset for JavaFX WebView
+     * @return event host
      */
-    public static HostServices fxPreset(WebEngine engine, LuaRuntime runtime, ConsoleHost console) {
-        Objects.requireNonNull(engine, "engine");
-        Objects.requireNonNull(runtime, "runtime");
-
-        FxDomHost dom = new FxDomHost(engine);
-        FxWebViewResourceHost resources = new FxWebViewResourceHost(engine);
-        FxUiHost ui = new FxUiHost(engine, dom);
-        FxEventHost events = new FxEventHost(dom, runtime.eventRouter());
-
-        Builder b = builder().dom(dom).events(events).resources(resources).ui(ui);
-
-        if (console != null) {
-            b.console(console);
-        }
-
-        return b.build();
-    }
+    Optional<EventHost> events();
 
     /**
-     * @return builder
+     * Returns an optional resource host.
+     *
+     * @return resource host
      */
-    public static Builder builder() {
-        return new Builder();
-    }
+    Optional<ResourceHost> resources();
 
     /**
-     * @return optional DomHost capability
+     * Returns an optional console host.
+     *
+     * @return console host
      */
-    public Optional<DomHost> dom() {
-        return Optional.ofNullable(dom);
-    }
+    Optional<ConsoleHost> console();
 
     /**
-     * @return optional EventHost capability
+     * Simple immutable implementation.
      */
-    public Optional<EventHost> events() {
-        return Optional.ofNullable(events);
-    }
-
-    /**
-     * @return optional ResourceHost capability
-     */
-    public Optional<ResourceHost> resources() {
-        return Optional.ofNullable(resources);
-    }
-
-    /**
-     * @return optional console host
-     */
-    public Optional<ConsoleHost> console() {
-        return Optional.ofNullable(console);
-    }
-
-    /**
-     * @return optional ui host
-     */
-    public Optional<UiHost> ui() {
-        return Optional.ofNullable(ui);
-    }
-
-    /**
-     * Builder for HostServices.
-     */
-    public static final class Builder {
-        private ConsoleHost console;
-        private DomHost dom;
-        private EventHost events;
-        private ResourceHost resources;
-        private UiHost ui;
-
-        public Builder console(ConsoleHost console) {
-            this.console = Objects.requireNonNull(console, "console");
-            return this;
-        }
-
-        public Builder ui(UiHost ui) {
-            this.ui = Objects.requireNonNull(ui, "ui");
-            return this;
-        }
+    final class Default implements HostServices {
+        private final UiHost ui;
+        private final DomHost dom;
+        private final EventHost events;
+        private final ResourceHost resources;
+        private final ConsoleHost console;
 
         /**
-         * Provides dom capability.
+         * Creates a HostServices container.
          *
+         * @param ui ui host
          * @param dom dom host
-         * @return this
-         */
-        public Builder dom(DomHost dom) {
-            this.dom = Objects.requireNonNull(dom, "dom");
-            return this;
-        }
-
-        /**
-         * Provides event subscription capability.
-         *
          * @param events event host
-         * @return this
-         */
-        public Builder events(EventHost events) {
-            this.events = Objects.requireNonNull(events, "events");
-            return this;
-        }
-
-        /**
-         * Provides resource loading capability.
-         *
          * @param resources resource host
-         * @return this
+         * @param console console host
          */
-        public Builder resources(ResourceHost resources) {
-            this.resources = Objects.requireNonNull(resources, "resources");
-            return this;
+        public Default(UiHost ui, DomHost dom, EventHost events, ResourceHost resources, ConsoleHost console) {
+            this.ui = ui;
+            this.dom = dom;
+            this.events = events;
+            this.resources = resources;
+            this.console = console;
         }
 
-        public HostServices build() {
-            return new HostServices(this);
+        @Override
+        public Optional<UiHost> ui() {
+            return Optional.ofNullable(ui);
+        }
+
+        @Override
+        public Optional<DomHost> dom() {
+            return Optional.ofNullable(dom);
+        }
+
+        @Override
+        public Optional<EventHost> events() {
+            return Optional.ofNullable(events);
+        }
+
+        @Override
+        public Optional<ResourceHost> resources() {
+            return Optional.ofNullable(resources);
+        }
+
+        @Override
+        public Optional<ConsoleHost> console() {
+            return Optional.ofNullable(console);
         }
     }
-}
+
+    /**
+     * Stdout-based console host.
+     */
+    final class StdoutConsole implements ConsoleHost {
+        private final String prefix;
+
+        /**
+         * Creates a new stdout console with a prefix.
+         *
+         * @param prefix prefix (may be empty)
+         */
+        public StdoutConsole(String prefix) {
+            this.prefix = Objects.requireNonNull(prefix, "prefix");
+        }
+
+        @Override
+        public void info(String message) {
+            System.out.println(prefix + "[info] " + safe(message));
+        }
+
+        @Override
+        public void log(String message) {
+            System.out.println(prefix + "[log] " + safe(message));
+        }
+
+        @Override
+        public void warn(String message) {
+            System.out.println(prefix + "[warn] " + safe(message));
+        }
+
+        @Override
+        public void error(String message) {
+            System.err.println(prefix + "[error] " + safe(message));
+        }
+
+        @Override
+        public void exception(String message) {
+            System.err.println(prefix + "[exception] " + safe(message));
+        }
+
+        private static String safe(String s) {
+            return s == null ? "" : s;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/hosts/ResourceHost.java b/src/main/java/org/openautonomousconnection/luascript/hosts/ResourceHost.java
index 3528c48..4fb33a4 100644
--- a/src/main/java/org/openautonomousconnection/luascript/hosts/ResourceHost.java
+++ b/src/main/java/org/openautonomousconnection/luascript/hosts/ResourceHost.java
@@ -1,16 +1,16 @@
 package org.openautonomousconnection.luascript.hosts;
 
 /**
- * Resource loading abstraction for LuaScript (e.g. script src).
+ * Abstraction for loading external resources (e.g. {@code <script src="...">}).
  */
 public interface ResourceHost {
 
     /**
-     * Reads text from a script source (file/url/virtual path).
+     * Reads a UTF-8 text resource.
      *
-     * @param src source identifier
+     * @param src resource location (absolute or relative)
      * @return text content
-     * @throws Exception on load failures
+     * @throws Exception on IO or resolution error
      */
     String readText(String src) throws Exception;
-}
+}
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/hosts/UiHost.java b/src/main/java/org/openautonomousconnection/luascript/hosts/UiHost.java
index 051a862..97af127 100644
--- a/src/main/java/org/openautonomousconnection/luascript/hosts/UiHost.java
+++ b/src/main/java/org/openautonomousconnection/luascript/hosts/UiHost.java
@@ -1,59 +1,215 @@
 package org.openautonomousconnection.luascript.hosts;
 
 /**
- * Host capability for UI operations.
+ * Abstraction for UI operations exposed to scripts.
  */
 public interface UiHost {
 
+    /**
+     * Displays an alert-like message.
+     *
+     * @param message message
+     */
     void alert(String message);
 
+    /**
+     * Displays a confirm-like prompt.
+     *
+     * @param message message
+     * @return true if accepted
+     */
     boolean confirm(String message);
 
+    /**
+     * Displays a prompt-like query.
+     *
+     * @param message message
+     * @param defaultValue default value
+     * @return user response or default
+     */
     String prompt(String message, String defaultValue);
 
+    /**
+     * Sets element text.
+     *
+     * @param elementId element id
+     * @param text text
+     */
     void setText(String elementId, String text);
 
+    /**
+     * Gets element text.
+     *
+     * @param elementId element id
+     * @return text (never null)
+     */
     String getText(String elementId);
 
+    /**
+     * Sets element HTML (best-effort for non-JS hosts).
+     *
+     * @param elementId element id
+     * @param html html
+     */
     void setHtml(String elementId, String html);
 
+    /**
+     * Gets element HTML (best-effort for non-JS hosts).
+     *
+     * @param elementId element id
+     * @return html (never null)
+     */
     String getHtml(String elementId);
 
+    /**
+     * Sets a form-like value.
+     *
+     * @param elementId element id
+     * @param value value
+     */
     void setValue(String elementId, String value);
 
+    /**
+     * Gets a form-like value.
+     *
+     * @param elementId element id
+     * @return value (never null)
+     */
     String getValue(String elementId);
 
+    /**
+     * Enables/disables an element.
+     *
+     * @param elementId element id
+     * @param enabled enabled
+     */
     void setEnabled(String elementId, boolean enabled);
 
+    /**
+     * Shows/hides an element.
+     *
+     * @param elementId element id
+     * @param visible visible
+     */
     void setVisible(String elementId, boolean visible);
 
+    /**
+     * Adds a class token.
+     *
+     * @param elementId element id
+     * @param className class token
+     */
     void addClass(String elementId, String className);
 
+    /**
+     * Removes a class token.
+     *
+     * @param elementId element id
+     * @param className class token
+     */
     void removeClass(String elementId, String className);
 
+    /**
+     * Toggles a class token.
+     *
+     * @param elementId element id
+     * @param className class token
+     * @return true if class is present after toggle
+     */
     boolean toggleClass(String elementId, String className);
 
+    /**
+     * Checks whether a class token is present.
+     *
+     * @param elementId element id
+     * @param className class token
+     * @return true if present
+     */
     boolean hasClass(String elementId, String className);
 
+    /**
+     * Sets a CSS property via style attribute (best-effort).
+     *
+     * @param elementId element id
+     * @param property css property
+     * @param value css value
+     */
     void setStyle(String elementId, String property, String value);
 
+    /**
+     * Gets a CSS property via style attribute (best-effort).
+     *
+     * @param elementId element id
+     * @param property css property
+     * @return css value or empty string
+     */
     String getStyle(String elementId, String property);
 
+    /**
+     * Sets an attribute.
+     *
+     * @param elementId element id
+     * @param name attribute name
+     * @param value value
+     */
     void setAttribute(String elementId, String name, String value);
 
+    /**
+     * Gets an attribute value or null if missing.
+     *
+     * @param elementId element id
+     * @param name attribute name
+     * @return value or null
+     */
     String getAttribute(String elementId, String name);
 
+    /**
+     * Removes an attribute.
+     *
+     * @param elementId element id
+     * @param name attribute name
+     */
     void removeAttribute(String elementId, String name);
 
+    /**
+     * Focuses an element (best-effort).
+     *
+     * @param elementId element id
+     */
     void focus(String elementId);
 
+    /**
+     * Blurs an element (best-effort).
+     *
+     * @param elementId element id
+     */
     void blur(String elementId);
 
+    /**
+     * Scrolls an element into view (best-effort).
+     *
+     * @param elementId element id
+     */
     void scrollIntoView(String elementId);
 
+    /**
+     * Returns viewport width or -1 if unknown.
+     *
+     * @return width
+     */
     int viewportWidth();
 
+    /**
+     * Returns viewport height or -1 if unknown.
+     *
+     * @return height
+     */
     int viewportHeight();
 
+    /**
+     * Returns current host time in milliseconds.
+     *
+     * @return millis
+     */
     long nowMillis();
 }
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/runtime/FxLuaScriptEngine.java b/src/main/java/org/openautonomousconnection/luascript/runtime/FxLuaScriptEngine.java
new file mode 100644
index 0000000..29d1d69
--- /dev/null
+++ b/src/main/java/org/openautonomousconnection/luascript/runtime/FxLuaScriptEngine.java
@@ -0,0 +1,134 @@
+package org.openautonomousconnection.luascript.runtime;
+
+import javafx.concurrent.Worker;
+import javafx.scene.web.WebEngine;
+import org.luaj.vm2.Globals;
+import org.openautonomousconnection.luascript.fx.FxDomHost;
+import org.openautonomousconnection.luascript.fx.FxEventHost;
+import org.openautonomousconnection.luascript.fx.FxUiHost;
+import org.openautonomousconnection.luascript.fx.FxWebViewResourceHost;
+import org.openautonomousconnection.luascript.hosts.HostServices;
+import org.openautonomousconnection.luascript.security.LuaExecutionPolicy;
+import org.openautonomousconnection.luascript.utils.LuaGlobalsFactory;
+
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * JavaFX WebView integration entry point for LuaScript (no JavaScript).
+ *
+ * <p>Hard rule: every HTML script tag is treated as Lua.</p>
+ */
+public final class FxLuaScriptEngine implements AutoCloseable {
+
+    private final WebEngine engine;
+    private final LuaExecutionPolicy policy;
+
+    private final AtomicBoolean bootstrapped = new AtomicBoolean(false);
+
+    private LuaRuntime runtime;
+
+    /**
+     * Creates an integration engine with default UI execution policy.
+     *
+     * @param engine web engine
+     */
+    public FxLuaScriptEngine(WebEngine engine) {
+        this(engine, LuaExecutionPolicy.uiDefault());
+    }
+
+    /**
+     * Creates an integration engine with a custom execution policy.
+     *
+     * @param engine web engine
+     * @param policy execution policy
+     */
+    public FxLuaScriptEngine(WebEngine engine, LuaExecutionPolicy policy) {
+        this.engine = Objects.requireNonNull(engine, "engine");
+        this.policy = Objects.requireNonNull(policy, "policy");
+    }
+
+    /**
+     * Installs a load hook that bootstraps Lua when a page finished loading.
+     */
+    public void install() {
+        engine.getLoadWorker().stateProperty().addListener((obs, oldState, newState) -> {
+            if (newState == Worker.State.SUCCEEDED) {
+                bootstrapped.set(false);
+                bootstrap();
+            } else if (newState == Worker.State.CANCELLED || newState == Worker.State.FAILED) {
+                bootstrapped.set(false);
+                closeRuntimeQuietly();
+            }
+        });
+    }
+
+    /**
+     * Bootstraps Lua for the currently loaded document.
+     */
+    public void bootstrap() {
+        if (!bootstrapped.compareAndSet(false, true)) return;
+
+        closeRuntimeQuietly();
+
+        // DOM host must exist before event/UI tables, and must ensure stable ids.
+        FxDomHost dom = new FxDomHost(engine);
+        dom.ensureAllElementsHaveId();
+
+        // Create per-page globals; harden sandbox in production.
+        Globals globals = LuaGlobalsFactory.create(
+                new LuaGlobalsFactory.Options()
+                        .enableDebug(false)
+                        .sandbox(true)
+        );
+
+        // Create runtime first (router lives inside it).
+        HostServices.StdoutConsole console = new HostServices.StdoutConsole("[lua] ");
+        FxUiHost uiHost = new FxUiHost(engine, dom);
+        FxWebViewResourceHost resourceHost = new FxWebViewResourceHost(engine);
+
+        // runtime depends on services; events depends on runtime router.
+        // We'll create eventHost after runtime, then build HostServices with it.
+        LuaRuntime rt = new LuaRuntime(globals, new HostServices.Default(uiHost, dom, null, resourceHost, console), policy);
+
+        FxEventHost eventHost = new FxEventHost(dom, rt.eventRouter());
+
+        // Rebuild services including eventHost and reinstall tables.
+        HostServices services = new HostServices.Default(uiHost, dom, eventHost, resourceHost, console);
+
+        // Replace runtime with correct services (clean and deterministic).
+        rt.close();
+        rt = new LuaRuntime(globals, services, policy);
+
+        rt.installStdTables(true);
+        rt.bootstrapFromDom();
+
+        this.runtime = rt;
+    }
+
+    /**
+     * Returns active runtime or null if not bootstrapped.
+     *
+     * @return runtime or null
+     */
+    public LuaRuntime runtimeOrNull() {
+        return runtime;
+    }
+
+    @Override
+    public void close() {
+        closeRuntimeQuietly();
+    }
+
+    private void closeRuntimeQuietly() {
+        LuaRuntime rt = this.runtime;
+        this.runtime = null;
+        if (rt != null) {
+            try {
+                rt.close();
+            } catch (Exception ignored) {
+                // Best-effort shutdown.
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/openautonomousconnection/luascript/runtime/LuaScriptBootstrap.java b/src/main/java/org/openautonomousconnection/luascript/runtime/LuaScriptBootstrap.java
index 07e7171..7d2b6c1 100644
--- a/src/main/java/org/openautonomousconnection/luascript/runtime/LuaScriptBootstrap.java
+++ b/src/main/java/org/openautonomousconnection/luascript/runtime/LuaScriptBootstrap.java
@@ -12,8 +12,10 @@ import java.util.Objects;
 
 /**
  * Bootstrap that:
- * 1) Executes ALL scripts found in DOM as Lua: &lt;script&gt; ... or &lt;script src="..."&gt;
+ * 1) Executes ALL scripts found in DOM as Lua: <script> ... or <script src="...">
  * 2) Scans DOM for on:* handlers and binds them automatically.
+ *
+ * <p>Hard client rule: JavaScript is not executed. Every HTML script tag is treated as Lua.</p>
  */
 public final class LuaScriptBootstrap {
 
@@ -36,11 +38,11 @@ public final class LuaScriptBootstrap {
         EventHost eventHost = services.events().orElseThrow(() -> new IllegalStateException("EventHost not provided"));
         ResourceHost resources = services.resources().orElseThrow(() -> new IllegalStateException("ResourceHost not provided"));
 
-        executeAllScripts(globals, dom, resources);
+        executeAllScriptsAsLua(globals, dom, resources);
         new LuaDomBinder(dom, eventHost, dispatcher).bindAll();
     }
 
-    private static void executeAllScripts(Globals globals, DomHost dom, ResourceHost resources) {
+    private static void executeAllScriptsAsLua(Globals globals, DomHost dom, ResourceHost resources) {
         for (String elementId : dom.getAllElementIds()) {
             String tag = safeLower(dom.getTagName(elementId));
             if (!"script".equals(tag)) continue;
@@ -70,4 +72,4 @@ public final class LuaScriptBootstrap {
     private static String safeLower(String s) {
         return s == null ? "" : s.trim().toLowerCase();
     }
-}
+}
\ No newline at end of file