diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b0d0fd2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+dc-backend/target
+
diff --git a/dc-backend/src/main/java/de/frigosped/dc/resource/CheckResource.java b/dc-backend/src/main/java/de/frigosped/dc/resource/CheckResource.java
index d83a02f..90a4db4 100644
--- a/dc-backend/src/main/java/de/frigosped/dc/resource/CheckResource.java
+++ b/dc-backend/src/main/java/de/frigosped/dc/resource/CheckResource.java
@@ -7,25 +7,42 @@ import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
 import org.eclipse.microprofile.openapi.annotations.Operation;
 import org.eclipse.microprofile.openapi.annotations.tags.Tag;
+import org.jboss.logging.Logger;
 
 import java.util.Map;
-import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicInteger;
 
 /**
  * REST-Endpunkte des Dokumenten-Check-Backend.
  *
  * POST /check/{projectId}
- *   → Startet die asynchrone Verarbeitung eines Projekts.
- *   → Gibt sofort 202 Accepted zurück; Fortschritt über ORDS-Endpunkte ablesbar.
+ *   → Reiht das Projekt in eine sequentielle Warteschlange ein (202 sofort).
+ *   → Projekte werden strikt nacheinander verarbeitet (kein paralleler Betrieb).
  *
  * GET /check/health
- *   → Einfacher Health-Check.
+ *   → Einfacher Health-Check inkl. Warteschlangenlänge.
  */
 @Path("/check")
 @Produces(MediaType.APPLICATION_JSON)
 @Tag(name = "Dokumenten-Check", description = "KI-gestützte Dokumentenprüfung")
 public class CheckResource {
 
+    private static final Logger LOG = Logger.getLogger(CheckResource.class);
+
+    // Single-Thread-Executor: garantiert sequentielle Abarbeitung.
+    // Eingehende Aufrufe werden automatisch in die Warteschlange gelegt.
+    private static final ExecutorService QUEUE =
+        Executors.newSingleThreadExecutor(r -> {
+            Thread t = new Thread(r, "dc-processing-thread");
+            t.setDaemon(true);
+            return t;
+        });
+
+    // Anzahl Projekte in der Warteschlange (inkl. laufendem)
+    private static final AtomicInteger QUEUED = new AtomicInteger(0);
+
     @Inject
     CheckOrchestrationService orchestrationService;
 
@@ -36,35 +53,34 @@ public class CheckResource {
     @POST
     @Path("/{projectId}")
     @Operation(
-        summary = "Startet die Dokumentenprüfung für ein Projekt",
+        summary = "Reiht ein Projekt in die Verarbeitungswarteschlange ein",
         description = """
-            Triggert den vollständigen Prüfablauf asynchron:
-            1. OCR / Konvertierung der Dokumente (KI)
-            2. Übersetzung ins Deutsche (KI)
-            3. Auswertung des Fragenkatalogs (KI)
-            4. Ergebnisse werden in ORDS gespeichert
+            Projekte werden strikt nacheinander verarbeitet.
+            Der Aufruf kehrt sofort mit 202 zurück; die eigentliche Verarbeitung
+            startet sobald alle vorher eingereihten Projekte abgeschlossen sind.
 
             Das Projekt muss im Status PENDING sein.
             Fortschritt: GET {ords}/api/dc/projects/{id}
             """
     )
     public Response startCheck(@PathParam("projectId") long projectId) {
-        // Asynchron starten – Fire & Forget.
-        // Der aufrufende Thread (z.B. APEX-Button) bekommt sofort 202.
-        // Der Verarbeitungs-Thread läuft im ForkJoin-CommonPool.
-        CompletableFuture
-            .runAsync(() -> orchestrationService.process(projectId))
-            .exceptionally(ex -> {
-                // Der Orchestrator fängt intern; dies ist eine letzte Absicherung.
-                // Logging ist dort bereits vorhanden.
-                return null;
-            });
+        int position = QUEUED.incrementAndGet();
+
+        QUEUE.submit(() -> {
+            try {
+                LOG.infof("Starte Projekt %d (Warteschlange: %d)", projectId, QUEUED.get());
+                orchestrationService.process(projectId);
+            } finally {
+                QUEUED.decrementAndGet();
+            }
+        });
 
         return Response
             .accepted(Map.of(
-                "message",    "Verarbeitung gestartet",
-                "project_id", projectId,
-                "hint",       "Fortschritt: GET /api/dc/projects/" + projectId
+                "message",        "Projekt in Warteschlange eingereiht",
+                "project_id",     projectId,
+                "queue_position", position,
+                "hint",           "Fortschritt: GET /api/dc/projects/" + projectId
             ))
             .build();
     }
@@ -75,8 +91,12 @@ public class CheckResource {
 
     @GET
     @Path("/health")
-    @Operation(summary = "Health-Check", description = "Gibt UP zurück wenn der Service läuft.")
+    @Operation(summary = "Health-Check", description = "Gibt UP zurück inkl. Warteschlangenlänge.")
     public Response health() {
-        return Response.ok(Map.of("status", "UP", "service", "dc-backend")).build();
+        return Response.ok(Map.of(
+            "status",  "UP",
+            "service", "dc-backend",
+            "queued",  QUEUED.get()
+        )).build();
     }
 }
diff --git a/dc-backend/target/classes/application.properties b/dc-backend/target/classes/application.properties
index 2ffa717..b9d65bc 100644
--- a/dc-backend/target/classes/application.properties
+++ b/dc-backend/target/classes/application.properties
@@ -18,13 +18,19 @@ dc.ai.base-url=https://ollama.aquantico.de
 dc.ai.api-key=324GF44-50AA-4B57-9386-K435DLJ764DFR
 
 # Hauptmodell: Auswertung + Übersetzung
-dc.ai.main.model=gpt-oss:20b
+dc.ai.main.model=qwen3.6:35b-a3b-q4_K_M
 dc.ai.main.timeout=300s
 dc.ai.main.max-retries=2
 dc.ai.main.temperature=0.1
 
+# Katalog-Generierungsmodell: längerer Timeout für vollständige Katalog-Analyse
+dc.ai.catalog.model=qwen3.6:35b-a3b-q4_K_M
+dc.ai.catalog.timeout=1200s
+dc.ai.catalog.max-retries=1
+dc.ai.catalog.temperature=0.1
+
 # OCR-Modell: Bildtext-Extraktion aus PDF-Seiten
-dc.ai.ocr.model=quen3.5:9b
+dc.ai.ocr.model=qwen3.6:35b-a3b-q4_K_M
 dc.ai.ocr.timeout=120s
 dc.ai.ocr.max-retries=2
 
@@ -32,7 +38,7 @@ dc.ai.ocr.max-retries=2
 # ORDS REST Client
 # =============================================================================
 # Basis-URL des ORDS-Servers (Schema-Pfad anpassen)
-quarkus.rest-client.ords-api.url=http://localhost:8080/ords/FRIGOSPED_APP
+quarkus.rest-client.ords-api.url=http://ords:8080/ords/ai_dev
 quarkus.rest-client.ords-api.scope=jakarta.inject.Singleton
 quarkus.rest-client.ords-api.connect-timeout=10000
 quarkus.rest-client.ords-api.read-timeout=60000
@@ -49,8 +55,8 @@ quarkus.log.category."de.frigosped".level=DEBUG
 # KI-Kommunikation mitloggen (nur in Dev)
 %dev.dc.ai.log-requests=true
 %dev.dc.ai.log-responses=true
-%prod.dc.ai.log-requests=false
-%prod.dc.ai.log-responses=false
+%prod.dc.ai.log-requests=true
+%prod.dc.ai.log-responses=true
 
 # =============================================================================
 # Jackson: snake_case für ORDS-Responses
diff --git a/dc-backend/target/classes/de/frigosped/dc/ai/AiModelProducer.class b/dc-backend/target/classes/de/frigosped/dc/ai/AiModelProducer.class
index 5d58c5d..00a5781 100644
Binary files a/dc-backend/target/classes/de/frigosped/dc/ai/AiModelProducer.class and b/dc-backend/target/classes/de/frigosped/dc/ai/AiModelProducer.class differ
diff --git a/dc-backend/target/classes/de/frigosped/dc/client/OrdsClient.class b/dc-backend/target/classes/de/frigosped/dc/client/OrdsClient.class
index 7638612..57bbf49 100644
Binary files a/dc-backend/target/classes/de/frigosped/dc/client/OrdsClient.class and b/dc-backend/target/classes/de/frigosped/dc/client/OrdsClient.class differ
diff --git a/dc-backend/target/classes/de/frigosped/dc/model/OrdsQuestion.class b/dc-backend/target/classes/de/frigosped/dc/model/OrdsQuestion.class
index 528dd8f..d0c5668 100644
Binary files a/dc-backend/target/classes/de/frigosped/dc/model/OrdsQuestion.class and b/dc-backend/target/classes/de/frigosped/dc/model/OrdsQuestion.class differ
diff --git a/dc-backend/target/classes/de/frigosped/dc/model/ProgressRequest.class b/dc-backend/target/classes/de/frigosped/dc/model/ProgressRequest.class
index 94e0ad4..add1168 100644
Binary files a/dc-backend/target/classes/de/frigosped/dc/model/ProgressRequest.class and b/dc-backend/target/classes/de/frigosped/dc/model/ProgressRequest.class differ
diff --git a/dc-backend/target/classes/de/frigosped/dc/resource/CheckResource.class b/dc-backend/target/classes/de/frigosped/dc/resource/CheckResource.class
index 4373540..90d10fc 100644
Binary files a/dc-backend/target/classes/de/frigosped/dc/resource/CheckResource.class and b/dc-backend/target/classes/de/frigosped/dc/resource/CheckResource.class differ
diff --git a/dc-backend/target/classes/de/frigosped/dc/service/CheckOrchestrationService.class b/dc-backend/target/classes/de/frigosped/dc/service/CheckOrchestrationService.class
index 00be641..4d0beac 100644
Binary files a/dc-backend/target/classes/de/frigosped/dc/service/CheckOrchestrationService.class and b/dc-backend/target/classes/de/frigosped/dc/service/CheckOrchestrationService.class differ
diff --git a/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst b/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
index 57f3904..b39f459 100644
--- a/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
+++ b/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
@@ -1,4 +1,23 @@
-de/frigosped/dc/service/CheckOrchestrationService.class
+de/frigosped/dc/model/GeneratedCatalogStructure$GeneratedCategory.class
+de/frigosped/dc/resource/ExportResource.class
+de/frigosped/dc/model/OrdsQuestionCreateRequest.class
+de/frigosped/dc/model/OrdsCategoryCreateRequest.class
+de/frigosped/dc/model/OrdsCatalogCreateRequest.class
+de/frigosped/dc/model/OrdsCatalogStatusUpdateRequest.class
 de/frigosped/dc/service/EvaluationService.class
+de/frigosped/dc/service/MarkdownExportService.class
 de/frigosped/dc/service/DocumentProcessingService.class
+de/frigosped/dc/model/CatalogGenerateResponse.class
+de/frigosped/dc/service/MarkdownExportService$Seg.class
+de/frigosped/dc/model/OrdsCatalogStatusResponse.class
+de/frigosped/dc/model/OrdsDocumentTexts.class
+de/frigosped/dc/resource/CatalogResource.class
+de/frigosped/dc/model/ExportRequest.class
+de/frigosped/dc/service/CatalogGenerationService.class
+de/frigosped/dc/service/CheckOrchestrationService.class
+de/frigosped/dc/service/MarkdownExportService$SegType.class
+de/frigosped/dc/model/GeneratedCatalogStructure.class
+de/frigosped/dc/client/OrdsLoggingFilter.class
+de/frigosped/dc/service/MarkdownExportService$PdfWriter.class
 de/frigosped/dc/security/ApiKeyFilter.class
+de/frigosped/dc/model/GeneratedCatalogStructure$GeneratedQuestion.class
diff --git a/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst b/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
index 0c64751..c3dd4dd 100644
--- a/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
+++ b/dc-backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
@@ -1,16 +1,30 @@
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/ai/AiModelProducer.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/client/OrdsClient.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/client/OrdsLoggingFilter.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/CatalogGenerateResponse.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/EvaluationResult.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/ExportRequest.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/GeneratedCatalogStructure.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsCatalogCreateRequest.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsCatalogStatusResponse.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsCatalogStatusUpdateRequest.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsCategoryCreateRequest.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsDocument.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsDocumentList.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsDocumentTexts.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsProject.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsQuestion.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsQuestionCreateRequest.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/OrdsQuestionList.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/ProgressRequest.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/ResultRequest.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/model/TextsRequest.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/resource/CatalogResource.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/resource/CheckResource.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/resource/ExportResource.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/security/ApiKeyFilter.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/service/CatalogGenerationService.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/service/CheckOrchestrationService.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/service/DocumentProcessingService.java
 /mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/service/EvaluationService.java
+/mnt/c/source/Frigosped/Dokumenten-Check/dc-backend/src/main/java/de/frigosped/dc/service/MarkdownExportService.java