diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index caf27e9724c..1deaacade00 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -41,3 +41,25 @@ jobs:
           echo "::error title=Inconsistent JavaDoc::JavaDoc-Basher discovered JavaDoc inconsistencies between implementations, which must be resolved."
           exit 1
         fi
+
+  check-jni-generator-consistency:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+    - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v5.0.0
+    - uses: actions/setup-java@de5a937a1dc73fbc1a67d7d1aa4bebc1082f3190 # v5.0.0
+      with:
+        java-version: 25
+        distribution: 'temurin'
+        cache: maven
+    - name: Run JNI generator
+      run: >
+        mvn --non-recursive --batch-mode --no-transfer-progress
+        -Pjni-generator exec:exec@run-jni-generator
+    - name: Verify no changes
+      run: |
+        if ! git diff --exit-code ; then
+          echo "::error title=Outdated JNI glue code::The generated native sources (os.c, *_stats.*, *_structs.* ...) do not match the Java native declarations. Regenerate them with 'mvn --non-recursive -Pjni-generator exec:exec@run-jni-generator' and commit the result."
+          exit 1
+        fi
diff --git a/AGENTS.md b/AGENTS.md
index 77f3df037d4..d1f90fb6c28 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -59,7 +59,12 @@ mvn clean verify -DskipTests
 See `bundles/org.eclipse.swt/Readme.md#building-native-binaries` for instructions how to build the SWT native binaries.
 
 **CRITICAL**: Files like `os.c`, `os_stats.c`, `os_stats.h` are **auto-generated**. Never edit them directly!
-Instead: modify Java source (e.g., `OS.java`), clean/rebuild the project, then run the native build command above.
+Instead: modify Java source (e.g., `OS.java`), regenerate the C files, then run the native build command above.
+To regenerate without the Eclipse IDE, run at the repository root:
+```bash
+mvn --non-recursive -Pjni-generator exec:exec@run-jni-generator
+```
+The pull-request checks run this command and fail if the committed generated files are outdated.
 
 **CRITICAL**: Never commit any built native binary files to git. These are built and committed by the CI. This includes:
 - Linux: `libswt-*.so`
@@ -198,7 +203,7 @@ display.asyncExec(() -> button.setText("Updated"));
 
 ### Adding GTK Functions
 1. Add native method declaration to `OS.java` with JavaDoc annotations (`@param cast=`, `@method flags=dynamic`)
-2. Clean and rebuild `org.eclipse.swt` project (regenerates `os.c`)
+2. Regenerate `os.c` and friends: `mvn --non-recursive -Pjni-generator exec:exec@run-jni-generator` (or clean and rebuild the `org.eclipse.swt` project in the IDE)
 3. Rebuild natives: `cd bundles/org.eclipse.swt/Eclipse SWT PI/gtk/library && export GTK_VERSION=3.0 && ./build.sh install`
 
 ## Tips for AI Tools
diff --git a/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTClass.java b/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTClass.java
index a9aa666b68d..c01c5cf6de4 100644
--- a/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTClass.java	
+++ b/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTClass.java	
@@ -79,19 +79,18 @@ public ASTClass(String sourcePath, MetaData metaData) {
 	packageName = unit.getPackage().getName().getFullyQualifiedName();
 	name = packageName + "." + simpleName;
 	superclassName = type.getSuperclassType() != null ? type.getSuperclassType().toString() : null;
-	List<ImportDeclaration> imports = unit.imports();
+	List<?> imports = unit.imports();
 	this.imports = new String[imports.size()];
 	int count = 0;
-	for (ImportDeclaration imp : imports) {
-		this.imports[count++] = imp.getName().getFullyQualifiedName();
+	for (Object imp : imports) {
+		this.imports[count++] = ((ImportDeclaration) imp).getName().getFullyQualifiedName();
 	}
 	start = type.getStartPosition();
-	
+
 	Javadoc doc = type.getJavadoc();
-	List<TagElement> tags = null;
 	if (doc != null) {
-		tags = doc.tags();
-		for (TagElement tag : tags) {
+		for (Object element : doc.tags()) {
+			TagElement tag = (TagElement) element;
 			if ("@jniclass".equals(tag.getTagName())) {
 				String data = tag.fragments().get(0).toString();
 				setMetaData(data);
@@ -102,9 +101,8 @@ public ASTClass(String sourcePath, MetaData metaData) {
 
 	List<ASTField> fid = new ArrayList<>();
 	for (FieldDeclaration field : type.getFields()) {
-		List<VariableDeclarationFragment> fragments = field.fragments();
-		for (VariableDeclarationFragment fragment : fragments) {
-			fid.add(new ASTField(this, field, fragment));
+		for (Object fragment : field.fragments()) {
+			fid.add(new ASTField(this, field, (VariableDeclarationFragment) fragment));
 		}
 	}
 	this.fields = fid.toArray(new ASTField[fid.size()]);
diff --git a/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTField.java b/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTField.java
index 061f7484770..313d24f93ef 100644
--- a/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTField.java	
+++ b/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTField.java	
@@ -32,10 +32,9 @@ public ASTField(ASTClass declaringClass, FieldDeclaration field, VariableDeclara
 	start = field.getStartPosition();
 	
 	Javadoc doc = field.getJavadoc();
-	List<TagElement> tags = null;
 	if (doc != null) {
-		tags = doc.tags();
-		for (TagElement tag : tags) {
+		for (Object element : doc.tags()) {
+			TagElement tag = (TagElement) element;
 			if ("@field".equals(tag.getTagName())) {
 				String data = tag.fragments().get(0).toString();
 				setMetaData(data);
diff --git a/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTMethod.java b/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTMethod.java
index b01e79d8f24..c5fb28829f7 100644
--- a/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTMethod.java	
+++ b/bundles/org.eclipse.swt.tools/JNI Generation/org/eclipse/swt/tools/internal/ASTMethod.java	
@@ -37,10 +37,11 @@ public ASTMethod(ASTClass declaringClass, MethodDeclaration method) {
 	start = method.getStartPosition();
 	
 	Javadoc doc = method.getJavadoc();
-	List<TagElement> tags = null;
+	List<?> tags = null;
 	if (doc != null) {
 		tags = doc.tags();
-		for (TagElement tag : tags) {
+		for (Object element : tags) {
+			TagElement tag = (TagElement) element;
 			if ("@method".equals(tag.getTagName())) {
 				String data = tag.fragments().get(0).toString();
 				setMetaData(data);
@@ -49,19 +50,20 @@ public ASTMethod(ASTClass declaringClass, MethodDeclaration method) {
 		}
 	}
 	returnType = new ASTType(declaringClass.resolver, method.getReturnType2(), method.getExtraDimensions());
-	
-	List<SingleVariableDeclaration> parameters = method.parameters();
+
+	List<?> parameters = method.parameters();
 	paramTypes = new ASTType[parameters.size()];
 	this.parameters = new ASTParameter[paramTypes.length];
 	int i = 0;
-	for (Iterator<SingleVariableDeclaration> iterator = parameters.iterator(); iterator.hasNext(); i++) {
-		SingleVariableDeclaration param = iterator.next();
+	for (Iterator<?> iterator = parameters.iterator(); iterator.hasNext(); i++) {
+		SingleVariableDeclaration param = (SingleVariableDeclaration) iterator.next();
 		paramTypes[i] = new ASTType(declaringClass.resolver, param.getType(), param.getExtraDimensions());
 		this.parameters[i] = new ASTParameter(this, i, param.getName().getIdentifier());
-	
+
 		if (tags != null) {
 			String name = param.getName().getIdentifier();
-			for (TagElement tag : tags) {
+			for (Object element : tags) {
+				TagElement tag = (TagElement) element;
 				if ("@param".equals(tag.getTagName())) {
 					List<?> fragments = tag.fragments();
 					if (fragments.size() >= 2 && name.equals(fragments.get(0).toString())) {
diff --git a/bundles/org.eclipse.swt/Readme.md b/bundles/org.eclipse.swt/Readme.md
index 03edc76b058..4936d7fbcfb 100644
--- a/bundles/org.eclipse.swt/Readme.md
+++ b/bundles/org.eclipse.swt/Readme.md
@@ -61,6 +61,21 @@ Running the snippets:
 * (Optionally) install CDT from marketplace if you want to work on C/Native parts of SWT.
 * You should be able to run snippets now. (_e.g._ `Snippet1`).
 
+## Regenerating the JNI glue code
+
+The C files `os.c`, `*_stats.c/h` and `*_structs.c/h` next to `build.sh` in the `library` folders are generated
+from the `native` method declarations (and their `@method`/`@param` JavaDoc annotations) in the Java sources.
+Never edit them by hand. After changing a native declaration, regenerate them for all platforms from the CLI
+(at the repository root):
+```bash
+mvn --non-recursive -Pjni-generator exec:exec@run-jni-generator
+```
+and commit the changed C files together with the Java change. The pull-request checks run the same command and
+fail when the committed C files are outdated.
+
+In the Eclipse IDE the same happens automatically when the **SWT Tools** feature is installed:
+its `JNI Builder` regenerates the files on every build of the `org.eclipse.swt` project.
+
 ## Building native binaries
 
 To build only SWT's native binaries, run from the CLI (at the repository root):
diff --git a/pom.xml b/pom.xml
index e632b7e0846..3b2488f4d1e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -109,7 +109,6 @@
           <plugin>
             <groupId>org.codehaus.mojo</groupId>
             <artifactId>exec-maven-plugin</artifactId>
-            <version>3.6.3</version>
             <executions>
               <execution>
                 <id>run-javadoc-basher</id>
@@ -118,30 +117,48 @@
                 </goals>
                 <phase>validate</phase>
                 <configuration>
-                  <forceJava>true</forceJava>
-                  <workingDirectory>bundles/org.eclipse.swt.tools</workingDirectory>
-                  <executable>java</executable>
                   <arguments>
                     <argument>-classpath</argument>
                     <classpath/>
                     <argument>JavadocBasher/org/eclipse/swt/tools/internal/JavadocBasher.java</argument>
                   </arguments>
-                  <includePluginDependencies>true</includePluginDependencies>
                 </configuration>
               </execution>
             </executions>
-            <dependencies>
-              <dependency>
-                  <groupId>org.eclipse.jdt</groupId>
-                  <artifactId>org.eclipse.jdt.core</artifactId>
-                  <version>[3.44.0,)</version>
-              </dependency>
-              <dependency>
-                  <groupId>org.eclipse.platform</groupId>
-                  <artifactId>org.eclipse.jface</artifactId>
-                  <version>[3.38.0,)</version>
-              </dependency>
-            </dependencies>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+    <profile>
+      <!--
+        Regenerates the JNI glue code (os.c, *_stats.*, *_structs.* ...) of all platforms from the
+        native method declarations in the Java sources, without the Eclipse IDE builder. Run it with
+        "mvn -N -Pjni-generator exec:exec@run-jni-generator" (see bundles/org.eclipse.swt/Readme.md).
+        The pr-checks workflow runs this and fails when the committed generated files are out of date.
+      -->
+      <id>jni-generator</id>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.codehaus.mojo</groupId>
+            <artifactId>exec-maven-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>run-jni-generator</id>
+                <goals>
+                  <goal>exec</goal>
+                </goals>
+                <phase>validate</phase>
+                <configuration>
+                  <arguments>
+                    <argument>-classpath</argument>
+                    <classpath/>
+                    <argument>JNI Generation/org/eclipse/swt/tools/internal/JNIGeneratorApp.java</argument>
+                    <argument>all</argument>
+                  </arguments>
+                </configuration>
+              </execution>
+            </executions>
           </plugin>
         </plugins>
       </build>
@@ -149,6 +166,35 @@
   </profiles>
 
   <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <!-- Used by the javadoc-basher and jni-generator profiles to run tools from
+               bundles/org.eclipse.swt.tools with the java source-file launcher. -->
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>exec-maven-plugin</artifactId>
+          <version>3.6.3</version>
+          <configuration>
+            <forceJava>true</forceJava>
+            <executable>java</executable>
+            <workingDirectory>bundles/org.eclipse.swt.tools</workingDirectory>
+            <includePluginDependencies>true</includePluginDependencies>
+          </configuration>
+          <dependencies>
+            <dependency>
+              <groupId>org.eclipse.jdt</groupId>
+              <artifactId>org.eclipse.jdt.core</artifactId>
+              <version>[3.46.0,)</version>
+            </dependency>
+            <dependency>
+              <groupId>org.eclipse.platform</groupId>
+              <artifactId>org.eclipse.jface</artifactId>
+              <version>[3.39.100.0,)</version>
+            </dependency>
+          </dependencies>
+        </plugin>
+      </plugins>
+    </pluginManagement>
     <plugins>
       <plugin>
         <groupId>org.eclipse.tycho</groupId>