diff --git a/config/services.yaml b/config/services.yaml
index 6703f52..963eee6 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -21,11 +21,12 @@ parameters:
   mto.knowledge.vector_index: '%mto.knowledge.root%/vector.index'
   mto.knowledge.vector_index_meta: '%mto.knowledge.root%/vector.index.meta.json'
   mto.knowledge.upload: '%mto.knowledge.root%/uploads'
+
   # Backward compatibility alias
   mto.vector.data.upload.path: '%mto.knowledge.upload%'
 
   # ------------------------------------------------------------
-  # Index Configuration (Guardrails)
+  # Index Configuration (Fallback Guardrails)
   # ------------------------------------------------------------
 
   mto.index.chunk_size: 800
@@ -39,12 +40,11 @@ parameters:
   # ------------------------------------------------------------
 
   mto.vector.python_bin: '/var/www/html/.venv/bin/python3'
-
   mto.vector.ingest_script: '%mto.root%/src/Vector/vector_ingest.py'
   mto.vector.search_script: '%mto.root%/src/Vector/vector_search.py'
-
   mto.vector.timeout: 600
 
+
 # ------------------------------------------------------------
 # Services
 # ------------------------------------------------------------
@@ -117,12 +117,30 @@ services:
     alias: App\Knowledge\Retrieval\CachedRetriever
 
   # ------------------------------------------------------------
-  # Vector Search (noch unverändert – Umbau kommt in Schritt 2)
+  # Index Configuration Provider (DB + Fallback)
   # ------------------------------------------------------------
+
+  App\Index\IndexConfigurationProvider:
+    arguments:
+      $repository: '@App\Repository\IngestProfileRepository'
+      $fallbackChunkSize: '%mto.index.chunk_size%'
+      $fallbackChunkOverlap: '%mto.index.chunk_overlap%'
+      $fallbackEmbeddingModel: '%mto.index.embedding_model%'
+      $fallbackEmbeddingDimension: '%mto.index.embedding_dimension%'
+      $fallbackScoringVersion: '%mto.index.scoring_version%'
+
+  # ------------------------------------------------------------
+  # Index Meta Manager (uses Provider)
+  # ------------------------------------------------------------
+
   App\Index\IndexMetaManager:
     arguments:
       $metaPath: '%mto.knowledge.index_meta%'
-      $config: '@App\Index\IndexConfiguration'
+      $provider: '@App\Index\IndexConfigurationProvider'
+
+  # ------------------------------------------------------------
+  # Vector Layer
+  # ------------------------------------------------------------
 
   App\Vector\VectorSearchClient:
     arguments:
@@ -141,22 +159,12 @@ services:
       $indexMetaPath: '%mto.knowledge.index_meta%'
       $vectorIndexPath: '%mto.knowledge.vector_index%'
       $timeoutSeconds: '%mto.vector.timeout%'
-      $indexConfiguration: '@App\Index\IndexConfiguration'
+      $configurationProvider: '@App\Index\IndexConfigurationProvider'
 
   # ------------------------------------------------------------
-  # Index Configuration
+  # Admin Utilities
   # ------------------------------------------------------------
 
-  App\Index\IndexConfiguration:
-    arguments:
-      $chunkSize: '%mto.index.chunk_size%'
-      $chunkOverlap: '%mto.index.chunk_overlap%'
-      $embeddingModel: '%mto.index.embedding_model%'
-      $embeddingDimension: '%mto.index.embedding_dimension%'
-      $scoringVersion: '%mto.index.scoring_version%'
-      $indexFormat: 'ndjson'
-      $vectorBackend: 'faiss'
-
   App\Service\Admin\IndexNdjsonInspector:
     arguments:
       $ndJsonPath: '%mto.knowledge.ndjson%'
diff --git a/migrations/Version20260216000100.php b/migrations/Version20260216000100.php
new file mode 100644
index 0000000..5a76ffc
--- /dev/null
+++ b/migrations/Version20260216000100.php
@@ -0,0 +1,38 @@
+<?php
+
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260216000100 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create ingest_profile table';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $table = $schema->createTable('ingest_profile');
+        $table->addColumn('id', 'binary', ['length' => 16]);
+        $table->addColumn('version', 'integer');
+        $table->addColumn('chunk_size', 'integer');
+        $table->addColumn('chunk_overlap', 'integer');
+        $table->addColumn('embedding_model', 'string', ['length' => 255]);
+        $table->addColumn('embedding_dimension', 'integer');
+        $table->addColumn('scoring_version', 'integer');
+        $table->addColumn('active', 'boolean');
+        $table->addColumn('reindex_required', 'boolean');
+        $table->addColumn('created_at', 'datetime_immutable');
+        $table->setPrimaryKey(['id']);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $schema->dropTable('ingest_profile');
+    }
+}
diff --git a/src/Controller/Admin/IngestProfileController.php b/src/Controller/Admin/IngestProfileController.php
new file mode 100644
index 0000000..e2c4f78
--- /dev/null
+++ b/src/Controller/Admin/IngestProfileController.php
@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller\Admin;
+
+use App\Entity\IngestProfile;
+use App\Index\IndexConfigurationProvider;
+use App\Index\IndexMetaManager;
+use App\Index\IndexStructureComparator;
+use App\Repository\IngestProfileRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/admin/ingest-profiles')]
+class IngestProfileController extends AbstractController
+{
+    #[Route('/', name: 'admin_ingest_profile_list')]
+    public function list(
+        IngestProfileRepository $repo,
+        IndexMetaManager $metaManager,
+        IndexConfigurationProvider $provider,
+        IndexStructureComparator $comparator
+    ): Response {
+
+        $profiles = $repo->findBy([], ['version' => 'DESC']);
+        $activeProfile = $repo->findActive();
+
+        $meta = $metaManager->readMeta();
+        $currentStructure = $provider->getConfiguration()->toStructureArray();
+
+        $diff = $comparator->compare($meta, $currentStructure);
+
+        $structureMismatch = false;
+        foreach ($diff as $row) {
+            if (!$row['equal']) {
+                $structureMismatch = true;
+                break;
+            }
+        }
+
+        return $this->render('admin/ingest_profile/list.html.twig', [
+            'profiles' => $profiles,
+            'activeProfile' => $activeProfile,
+            'indexMeta' => $meta,
+            'diff' => $diff,
+            'structureMismatch' => $structureMismatch,
+        ]);
+    }
+
+    #[Route('/create', name: 'admin_ingest_profile_create', methods: ['GET', 'POST'])]
+    public function create(
+        Request $request,
+        IngestProfileRepository $repo,
+        EntityManagerInterface $em
+    ): Response {
+
+        if ($request->isMethod('POST')) {
+
+            $latest = $repo->findLatestVersion();
+            $nextVersion = $latest ? $latest->getVersion() + 1 : 1;
+
+            $profile = new IngestProfile(
+                $nextVersion,
+                (int)$request->request->get('chunk_size'),
+                (int)$request->request->get('chunk_overlap'),
+                (string)$request->request->get('embedding_model'),
+                (int)$request->request->get('embedding_dimension'),
+                (int)$request->request->get('scoring_version')
+            );
+
+            $em->persist($profile);
+            $em->flush();
+
+            return $this->redirectToRoute('admin_ingest_profile_list');
+        }
+
+        return $this->render('admin/ingest_profile/create.html.twig');
+    }
+
+    #[Route('/activate/{id}', name: 'admin_ingest_profile_activate')]
+    public function activate(
+        IngestProfile $profile,
+        IngestProfileRepository $repo,
+        EntityManagerInterface $em
+    ): Response {
+
+        $active = $repo->findActive();
+        if ($active) {
+            $active->deactivate();
+        }
+
+        $profile->activate();
+
+        $em->flush();
+
+        return $this->redirectToRoute('admin_ingest_profile_list');
+    }
+}
diff --git a/src/Entity/IngestProfile.php b/src/Entity/IngestProfile.php
new file mode 100644
index 0000000..5393df1
--- /dev/null
+++ b/src/Entity/IngestProfile.php
@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use App\Repository\IngestProfileRepository;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Uid\Uuid;
+
+#[ORM\Entity(repositoryClass: IngestProfileRepository::class)]
+#[ORM\Table(name: 'ingest_profile')]
+class IngestProfile
+{
+    #[ORM\Id]
+    #[ORM\Column(type: 'uuid', unique: true)]
+    private Uuid $id;
+
+    #[ORM\Column(type: 'integer')]
+    private int $version;
+
+    #[ORM\Column(type: 'integer')]
+    private int $chunkSize;
+
+    #[ORM\Column(type: 'integer')]
+    private int $chunkOverlap;
+
+    #[ORM\Column(type: 'string', length: 255)]
+    private string $embeddingModel;
+
+    #[ORM\Column(type: 'integer')]
+    private int $embeddingDimension;
+
+    #[ORM\Column(type: 'integer')]
+    private int $scoringVersion;
+
+    #[ORM\Column(type: 'boolean')]
+    private bool $active = false;
+
+    #[ORM\Column(type: 'boolean')]
+    private bool $reindexRequired = true;
+
+    #[ORM\Column(type: 'datetime_immutable')]
+    private \DateTimeImmutable $createdAt;
+
+    public function __construct(
+        int $version,
+        int $chunkSize,
+        int $chunkOverlap,
+        string $embeddingModel,
+        int $embeddingDimension,
+        int $scoringVersion
+    ) {
+        $this->id = Uuid::v4();
+        $this->version = $version;
+        $this->chunkSize = $chunkSize;
+        $this->chunkOverlap = $chunkOverlap;
+        $this->embeddingModel = $embeddingModel;
+        $this->embeddingDimension = $embeddingDimension;
+        $this->scoringVersion = $scoringVersion;
+        $this->createdAt = new \DateTimeImmutable();
+    }
+
+    public function getId(): Uuid { return $this->id; }
+    public function getVersion(): int { return $this->version; }
+    public function getChunkSize(): int { return $this->chunkSize; }
+    public function getChunkOverlap(): int { return $this->chunkOverlap; }
+    public function getEmbeddingModel(): string { return $this->embeddingModel; }
+    public function getEmbeddingDimension(): int { return $this->embeddingDimension; }
+    public function getScoringVersion(): int { return $this->scoringVersion; }
+    public function isActive(): bool { return $this->active; }
+    public function isReindexRequired(): bool { return $this->reindexRequired; }
+    public function getCreatedAt(): \DateTimeImmutable { return $this->createdAt; }
+
+    public function activate(): void
+    {
+        $this->active = true;
+        $this->reindexRequired = true;
+    }
+
+    public function deactivate(): void
+    {
+        $this->active = false;
+    }
+
+    public function markReindexDone(): void
+    {
+        $this->reindexRequired = false;
+    }
+}
diff --git a/src/Index/IndexConfigurationProvider.php b/src/Index/IndexConfigurationProvider.php
new file mode 100644
index 0000000..6202ea8
--- /dev/null
+++ b/src/Index/IndexConfigurationProvider.php
@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Index;
+
+use App\Repository\IngestProfileRepository;
+
+final class IndexConfigurationProvider
+{
+    private IngestProfileRepository $repository;
+
+    private int $fallbackChunkSize;
+    private int $fallbackChunkOverlap;
+    private string $fallbackEmbeddingModel;
+    private int $fallbackEmbeddingDimension;
+    private int $fallbackScoringVersion;
+
+    public function __construct(
+        IngestProfileRepository $repository,
+        int $fallbackChunkSize,
+        int $fallbackChunkOverlap,
+        string $fallbackEmbeddingModel,
+        int $fallbackEmbeddingDimension,
+        int $fallbackScoringVersion
+    ) {
+        $this->repository = $repository;
+
+        $this->fallbackChunkSize = $fallbackChunkSize;
+        $this->fallbackChunkOverlap = $fallbackChunkOverlap;
+        $this->fallbackEmbeddingModel = $fallbackEmbeddingModel;
+        $this->fallbackEmbeddingDimension = $fallbackEmbeddingDimension;
+        $this->fallbackScoringVersion = $fallbackScoringVersion;
+    }
+
+    public function getConfiguration(): IndexConfiguration
+    {
+        $active = $this->repository->findActive();
+
+        if ($active === null) {
+            // Fallback auf YAML
+            return new IndexConfiguration(
+                $this->fallbackChunkSize,
+                $this->fallbackChunkOverlap,
+                $this->fallbackEmbeddingModel,
+                $this->fallbackEmbeddingDimension,
+                $this->fallbackScoringVersion,
+                'ndjson',
+                'faiss'
+            );
+        }
+
+        return new IndexConfiguration(
+            $active->getChunkSize(),
+            $active->getChunkOverlap(),
+            $active->getEmbeddingModel(),
+            $active->getEmbeddingDimension(),
+            $active->getScoringVersion(),
+            'ndjson',
+            'faiss'
+        );
+    }
+}
diff --git a/src/Index/IndexMetaManager.php b/src/Index/IndexMetaManager.php
index 3920bd8..c3a5b58 100644
--- a/src/Index/IndexMetaManager.php
+++ b/src/Index/IndexMetaManager.php
@@ -7,157 +7,90 @@ namespace App\Index;
 final class IndexMetaManager
 {
     private string $metaPath;
-    private IndexConfiguration $config;
+    private IndexConfigurationProvider $provider;
 
     public function __construct(
         string $metaPath,
-        IndexConfiguration $config
+        IndexConfigurationProvider $provider
     ) {
         $this->metaPath = $metaPath;
-        $this->config = $config;
+        $this->provider = $provider;
     }
 
-    public function getMetaPath(): string
+    // -----------------------------------------------------
+    // Public API
+    // -----------------------------------------------------
+
+    public function ensureExists(): void
     {
-        return $this->metaPath;
+        if (!is_file($this->metaPath)) {
+            $this->writeMeta(1);
+        }
     }
 
-    /**
-     * @return array<string,mixed>|null
-     */
     public function readMeta(): ?array
     {
         if (!is_file($this->metaPath)) {
             return null;
         }
 
-        $raw = file_get_contents($this->metaPath);
-        if ($raw === false) {
-            throw new \RuntimeException('Unable to read index_meta.json');
-        }
-
-        $data = json_decode($raw, true);
-        if (!is_array($data)) {
-            throw new \RuntimeException('index_meta.json is invalid JSON');
-        }
-
-        return $data;
+        return json_decode(
+            (string) file_get_contents($this->metaPath),
+            true
+        );
     }
 
-    /**
-     * Guardrail:
-     * - Wenn Meta fehlt → initialisieren
-     * - Wenn Struktur driftet → Exception
-     */
     public function validateAgainstCurrent(): void
     {
         $meta = $this->readMeta();
+        $current = $this->provider
+            ->getConfiguration()
+            ->toStructureArray();
 
         if ($meta === null) {
-            $meta = $this->createInitialMeta();
+            return;
         }
 
-        $expected = $this->config->toStructureArray();
-        $diff = $this->diffStructure($meta, $expected);
-
-        if ($diff !== []) {
-            throw new IndexStructureChangedException(
-                'Index structure changed. Global Reindex required.',
-                $diff
-            );
-        }
-    }
-
-    /**
-     * Wird beim Global Reindex aufgerufen
-     */
-    public function writeMetaForGlobalReindex(): array
-    {
-        $current = $this->readMeta();
-
-        $nextVersion = 1;
-        if (is_array($current) && isset($current['index_version']) && is_int($current['index_version'])) {
-            $nextVersion = $current['index_version'] + 1;
-        }
-
-        $meta = $this->buildMetaPayload($nextVersion);
-        $this->atomicWriteJson($meta);
-
-        return $meta;
-    }
-
-    public function getConfig(): IndexConfiguration
-    {
-        return $this->config;
-    }
-
-    // ---------------------------------------------------------
-    // Internals
-    // ---------------------------------------------------------
-
-    private function createInitialMeta(): array
-    {
-        $meta = $this->buildMetaPayload(1);
-        $this->atomicWriteJson($meta);
-        return $meta;
-    }
-
-    private function buildMetaPayload(int $indexVersion): array
-    {
-        $structure = $this->config->toStructureArray();
-
-        return [
-            'index_version'       => $indexVersion,
-            'created_at'          => (new \DateTimeImmutable())->format(DATE_ATOM),
-            'embedding_model'     => $structure['embedding_model'],
-            'embedding_dimension' => $structure['embedding_dimension'],
-            'chunk_size'          => $structure['chunk_size'],
-            'chunk_overlap'       => $structure['chunk_overlap'],
-            'scoring_version'     => $structure['scoring_version'],
-            'index_format'        => $structure['index_format'],
-            'vector_backend'      => $structure['vector_backend'],
-        ];
-    }
-
-    private function diffStructure(array $meta, array $expected): array
-    {
-        $diff = [];
-
-        foreach ($expected as $key => $value) {
-            $actual = $meta[$key] ?? null;
-            if ($actual !== $value) {
-                $diff[$key] = [
-                    'expected' => $value,
-                    'actual'   => $actual,
-                ];
+        foreach ($current as $key => $value) {
+            if (($meta[$key] ?? null) !== $value) {
+                throw new \RuntimeException(
+                    'Index structure changed. Global Reindex required.'
+                );
             }
         }
-
-        return $diff;
     }
 
-    private function atomicWriteJson(array $payload): void
+    public function writeMetaForGlobalReindex(): void
     {
+        $current = $this->readMeta();
+        $nextVersion = ($current['index_version'] ?? 0) + 1;
+
+        $this->writeMeta($nextVersion);
+    }
+
+    public function writeMeta(int $indexVersion): void
+    {
+        $config = $this->provider->getConfiguration();
+
+        $payload = array_merge(
+            [
+                'index_version' => $indexVersion,
+                'created_at'    => (new \DateTimeImmutable())->format(DATE_ATOM),
+            ],
+            $config->toStructureArray()
+        );
+
         $dir = dirname($this->metaPath);
-
-        if (!is_dir($dir) && !mkdir($dir, 0777, true) && !is_dir($dir)) {
-            throw new \RuntimeException('Unable to create directory: ' . $dir);
+        if (!is_dir($dir)) {
+            mkdir($dir, 0777, true);
         }
 
-        $tmp = $this->metaPath . '.tmp';
-
-        $json = json_encode($payload, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
-        if ($json === false) {
-            throw new \RuntimeException('Unable to encode index_meta.json');
-        }
-
-        if (file_put_contents($tmp, $json . PHP_EOL) === false) {
-            throw new \RuntimeException('Unable to write temp meta file');
-        }
-
-        if (!rename($tmp, $this->metaPath)) {
-            @unlink($tmp);
-            throw new \RuntimeException('Unable to switch meta file atomically');
-        }
+        file_put_contents(
+            $this->metaPath,
+            json_encode(
+                $payload,
+                JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES
+            )
+        );
     }
 }
diff --git a/src/Index/IndexStructureComparator.php b/src/Index/IndexStructureComparator.php
new file mode 100644
index 0000000..effb232
--- /dev/null
+++ b/src/Index/IndexStructureComparator.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Index;
+
+final class IndexStructureComparator
+{
+    public function compare(?array $meta, array $profileStructure): array
+    {
+        $result = [];
+
+        $keys = array_unique(
+            array_merge(
+                array_keys($profileStructure),
+                $meta ? array_keys($meta) : []
+            )
+        );
+
+        foreach ($keys as $key) {
+            if (in_array($key, ['index_version', 'created_at'], true)) {
+                continue;
+            }
+
+            $metaValue = $meta[$key] ?? null;
+            $profileValue = $profileStructure[$key] ?? null;
+
+            $result[$key] = [
+                'meta' => $metaValue,
+                'profile' => $profileValue,
+                'equal' => $metaValue === $profileValue,
+            ];
+        }
+
+        return $result;
+    }
+}
diff --git a/src/Knowledge/Ingest/SimpleChunker.php b/src/Knowledge/Ingest/SimpleChunker.php
index 21944ca..3445537 100644
--- a/src/Knowledge/Ingest/SimpleChunker.php
+++ b/src/Knowledge/Ingest/SimpleChunker.php
@@ -5,22 +5,31 @@ declare(strict_types=1);
 
 namespace App\Knowledge\Ingest;
 
+use App\Index\IndexConfigurationProvider;
+
 final class SimpleChunker
 {
+    private IndexConfigurationProvider $configurationProvider;
+
     public function __construct(
-        private int $maxWords = 180,
-        private int $overlapWords = 30
-    ) {}
+        IndexConfigurationProvider $configurationProvider
+    ) {
+        $this->configurationProvider = $configurationProvider;
+    }
 
     /** @return string[] */
     public function chunk(string $text): array
     {
+        $config = $this->configurationProvider->getConfiguration();
+
+        $maxWords = $config->getChunkSize();
+        $overlapWords = $config->getChunkOverlap();
+
         $text = $this->normalize($text);
         if ($text === '') {
             return [];
         }
 
-        // Split into tokens: words + whitespace preserved
         $tokens = preg_split(
             '/(\s+)/u',
             $text,
@@ -32,7 +41,6 @@ final class SimpleChunker
             return [];
         }
 
-        // Build word index → token index mapping
         $wordTokenIndexes = [];
         foreach ($tokens as $i => $token) {
             if (!preg_match('/^\s+$/u', $token)) {
@@ -49,12 +57,11 @@ final class SimpleChunker
         $wordPos = 0;
 
         while ($wordPos < $totalWords) {
-            $wordEnd = min($wordPos + $this->maxWords, $totalWords);
+            $wordEnd = min($wordPos + $maxWords, $totalWords);
 
             $tokenStart = $wordTokenIndexes[$wordPos];
             $tokenEnd   = $wordTokenIndexes[$wordEnd - 1] + 1;
 
-            // Intelligent cut (sentence / paragraph aware)
             $tokenEnd = $this->adjustCutToBoundary($tokens, $tokenStart, $tokenEnd);
 
             $chunk = trim(implode('', array_slice(
@@ -71,7 +78,7 @@ final class SimpleChunker
                 break;
             }
 
-            $wordPos = max(0, $wordEnd - $this->overlapWords);
+            $wordPos = max(0, $wordEnd - $overlapWords);
         }
 
         return $this->dedupe($chunks);
@@ -86,30 +93,19 @@ final class SimpleChunker
         return trim((string) $text);
     }
 
-    /**
-     * Move cut backwards to a natural boundary if possible.
-     * Rules:
-     * - Never cut inside markdown list items
-     * - Sentence end only if followed by a line break
-     * - Paragraph breaks always allowed
-     */
     private function adjustCutToBoundary(array $tokens, int $start, int $end): int
     {
-        // Detect markdown list context (e.g. "- Foo: Bar")
         $startToken = $tokens[$start] ?? '';
         if (preg_match('/^- /u', ltrim($startToken))) {
-            // Keep list blocks intact
             return $end;
         }
 
         for ($i = $end - 1; $i > $start; $i--) {
 
-            // Paragraph boundary
             if ($tokens[$i] === "\n\n") {
                 return $i + 1;
             }
 
-            // Sentence boundary only if followed by newline
             if (
                 preg_match('/[.!?]\s*$/u', $tokens[$i]) &&
                 isset($tokens[$i + 1]) &&
diff --git a/src/Repository/IngestProfileRepository.php b/src/Repository/IngestProfileRepository.php
new file mode 100644
index 0000000..9ba1f80
--- /dev/null
+++ b/src/Repository/IngestProfileRepository.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\IngestProfile;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+class IngestProfileRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, IngestProfile::class);
+    }
+
+    public function findLatestVersion(): ?IngestProfile
+    {
+        return $this->createQueryBuilder('p')
+            ->orderBy('p.version', 'DESC')
+            ->setMaxResults(1)
+            ->getQuery()
+            ->getOneOrNullResult();
+    }
+
+    public function findActive(): ?IngestProfile
+    {
+        return $this->findOneBy(['active' => true]);
+    }
+}
diff --git a/src/Vector/VectorIndexBuilder.php b/src/Vector/VectorIndexBuilder.php
index fd21e47..b4598fb 100644
--- a/src/Vector/VectorIndexBuilder.php
+++ b/src/Vector/VectorIndexBuilder.php
@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace App\Vector;
 
-use App\Index\IndexConfiguration;
+use App\Index\IndexConfigurationProvider;
 use Symfony\Component\Process\Exception\ProcessFailedException;
 use Symfony\Component\Process\Process;
 
@@ -18,7 +18,7 @@ final class VectorIndexBuilder
     private string $vectorMetaPath;
     private int $timeoutSeconds;
 
-    private IndexConfiguration $indexConfiguration;
+    private IndexConfigurationProvider $configurationProvider;
 
     public function __construct(
         string $pythonBin,
@@ -27,7 +27,7 @@ final class VectorIndexBuilder
         string $indexMetaPath,
         string $vectorIndexPath,
         int $timeoutSeconds,
-        IndexConfiguration $indexConfiguration
+        IndexConfigurationProvider $configurationProvider
     ) {
         $this->pythonBin       = $pythonBin;
         $this->scriptPath      = $scriptPath;
@@ -36,39 +36,29 @@ final class VectorIndexBuilder
         $this->vectorIndexPath = $vectorIndexPath;
         $this->vectorMetaPath  = $vectorIndexPath . '.meta.json';
         $this->timeoutSeconds  = $timeoutSeconds;
-        $this->indexConfiguration = $indexConfiguration;
+        $this->configurationProvider = $configurationProvider;
     }
 
+    /**
+     * Rebuild FAISS Index deterministisch aus index.ndjson.
+     */
     public function rebuildFromNdjson(?string $logPath = null): void
     {
-        if (!is_file($this->scriptPath)) {
-            throw new \RuntimeException('vector_ingest.py not found at: ' . $this->scriptPath);
-        }
-
-        if (!is_file($this->indexNdjsonPath)) {
-            throw new \RuntimeException('index.ndjson not found at: ' . $this->indexNdjsonPath);
-        }
+        $this->assertPreconditions();
 
         if (!is_file($this->indexMetaPath)) {
             $this->initializeIndexMeta();
         }
 
-        $indexMeta = json_decode((string) file_get_contents($this->indexMetaPath), true);
+        $indexMeta = $this->readIndexMeta();
 
-        if (!is_array($indexMeta) || empty($indexMeta['embedding_model'])) {
-            throw new \RuntimeException('Invalid index_meta.json');
-        }
-
-        $embeddingModel = (string) $indexMeta['embedding_model'];
+        $embeddingModel = $indexMeta['embedding_model'];
 
         $tmpVectorIndexPath = $this->vectorIndexPath . '.tmp';
 
-        // Wichtig: Python erzeugt meta basierend auf endgültigem Namen
-        $finalMetaPath = $this->vectorMetaPath;
-        $tmpMetaPath   = dirname($this->vectorIndexPath) . '/' . basename($this->vectorIndexPath, '.index') . '.index.meta.json';
-
+        // Clean leftovers
         @unlink($tmpVectorIndexPath);
-        @unlink($finalMetaPath);
+        @unlink($this->vectorMetaPath);
 
         $cmd = [
             $this->pythonBin,
@@ -80,21 +70,41 @@ final class VectorIndexBuilder
 
         $process = new Process($cmd);
         $process->setTimeout($this->timeoutSeconds);
-        $process->mustRun();
 
-        if (!is_file($tmpVectorIndexPath) || filesize($tmpVectorIndexPath) === 0) {
-            throw new \RuntimeException('Vector index tmp missing or empty');
+        $this->runProcess($process, $logPath);
+
+        $this->validatePythonOutputs($tmpVectorIndexPath);
+
+        $this->atomicSwitch($tmpVectorIndexPath);
+    }
+
+    // -----------------------------------------------------
+    // Internals
+    // -----------------------------------------------------
+
+    private function assertPreconditions(): void
+    {
+        if (!is_file($this->scriptPath)) {
+            throw new \RuntimeException('vector_ingest.py not found at: ' . $this->scriptPath);
         }
 
-        // Python erzeugt vector.index.meta.json (nicht tmp.meta!)
-        if (!is_file($this->vectorMetaPath) || filesize($this->vectorMetaPath) === 0) {
-            throw new \RuntimeException('Vector meta missing or empty');
+        if (!is_file($this->indexNdjsonPath)) {
+            throw new \RuntimeException('index.ndjson not found at: ' . $this->indexNdjsonPath);
+        }
+    }
+
+    private function readIndexMeta(): array
+    {
+        $meta = json_decode(
+            (string) file_get_contents($this->indexMetaPath),
+            true
+        );
+
+        if (!is_array($meta) || empty($meta['embedding_model'])) {
+            throw new \RuntimeException('Invalid index_meta.json');
         }
 
-        // Atomarer Switch für Index
-        if (!rename($tmpVectorIndexPath, $this->vectorIndexPath)) {
-            throw new \RuntimeException('Atomic switch failed for vector index');
-        }
+        return $meta;
     }
 
     private function initializeIndexMeta(): void
@@ -105,14 +115,16 @@ final class VectorIndexBuilder
             throw new \RuntimeException('Cannot create knowledge directory');
         }
 
+        $config = $this->configurationProvider->getConfiguration();
+
         $data = [
             'index_version'       => 1,
             'created_at'          => (new \DateTimeImmutable())->format(DATE_ATOM),
-            'embedding_model'     => $this->indexConfiguration->getEmbeddingModel(),
-            'embedding_dimension' => $this->indexConfiguration->getEmbeddingDimension(),
-            'chunk_size'          => $this->indexConfiguration->getChunkSize(),
-            'chunk_overlap'       => $this->indexConfiguration->getChunkOverlap(),
-            'scoring_version'     => $this->indexConfiguration->getScoringVersion(),
+            'embedding_model'     => $config->getEmbeddingModel(),
+            'embedding_dimension' => $config->getEmbeddingDimension(),
+            'chunk_size'          => $config->getChunkSize(),
+            'chunk_overlap'       => $config->getChunkOverlap(),
+            'scoring_version'     => $config->getScoringVersion(),
             'index_format'        => 'ndjson',
             'vector_backend'      => 'faiss',
         ];
@@ -123,6 +135,24 @@ final class VectorIndexBuilder
         );
     }
 
+    private function validatePythonOutputs(string $tmpVectorIndexPath): void
+    {
+        if (!is_file($tmpVectorIndexPath) || filesize($tmpVectorIndexPath) === 0) {
+            throw new \RuntimeException('Vector index tmp missing or empty');
+        }
+
+        if (!is_file($this->vectorMetaPath) || filesize($this->vectorMetaPath) === 0) {
+            throw new \RuntimeException('Vector meta missing or empty');
+        }
+    }
+
+    private function atomicSwitch(string $tmpVectorIndexPath): void
+    {
+        if (!rename($tmpVectorIndexPath, $this->vectorIndexPath)) {
+            throw new \RuntimeException('Atomic switch failed for vector index');
+        }
+    }
+
     private function runProcess(Process $process, ?string $logPath): void
     {
         if ($logPath !== null) {
diff --git a/templates/admin/base.html.twig b/templates/admin/base.html.twig
index 11c4313..9e26c17 100644
--- a/templates/admin/base.html.twig
+++ b/templates/admin/base.html.twig
@@ -28,22 +28,35 @@
                 <li class="nav-item">
                     <a class="nav-link text-light" href="{{ path('admin_dashboard') }}">Dashboard</a>
                 </li>
+            </ul>
+            <hr>
+            <h3>Dokumente und Wissen</h3>
+            <ul class="nav flex-column">
                 <li class="nav-item">
                     <a class="nav-link text-light" href="{{ path('admin_documents') }}">Dokumente</a>
                 </li>
                 <li class="nav-item">
                     <a class="nav-link text-light" href="{{ path('admin_jobs') }}">
-                        Indexierung Jobs (Ingest)
+                        Indexierung (Ingest Jobs)
                     </a>
                 </li>
                 <li class="nav-item">
                     <a class="nav-link text-light" href="{{ path('admin_system_agent') }}">
-                        Wissen (Chunk-Index)
+                        Wissensdaten (Chunk-Index)
+                    </a>
+                </li>
+            </ul>
+            <hr>
+            <h3>System-Profile</h3>
+            <ul class="nav flex-column">
+                <li class="nav-item">
+                    <a class="nav-link text-light" href="{{ path('admin_system_prompt') }}">
+                        System-Prompt-Profil
                     </a>
                 </li>
                 <li class="nav-item">
-                    <a class="nav-link text-light" href="{{ path('admin_system_prompt') }}">
-                        System Prompt Settings
+                    <a class="nav-link text-light" href="{{ path('admin_ingest_profile_list') }}">
+                        Indexierungs-Profil (Ingest Profiles)
                     </a>
                 </li>
             </ul>
diff --git a/templates/admin/ingest_profile/create.html.twig b/templates/admin/ingest_profile/create.html.twig
new file mode 100644
index 0000000..5802047
--- /dev/null
+++ b/templates/admin/ingest_profile/create.html.twig
@@ -0,0 +1,26 @@
+{% extends 'admin/base.html.twig' %}
+
+{% block title %}System Prompt{% endblock %}
+
+{% block body %}
+    <h1>Create Ingest Profile</h1>
+
+    <form method="post">
+        <label>Chunk Size:</label>
+        <input type="number" name="chunk_size" required><br>
+
+        <label>Chunk Overlap:</label>
+        <input type="number" name="chunk_overlap" required><br>
+
+        <label>Embedding Model:</label>
+        <input type="text" name="embedding_model" required><br>
+
+        <label>Embedding Dimension:</label>
+        <input type="number" name="embedding_dimension" required><br>
+
+        <label>Scoring Version:</label>
+        <input type="number" name="scoring_version" required><br>
+
+        <button type="submit">Create</button>
+    </form>
+{% endblock %}
diff --git a/templates/admin/ingest_profile/list.html.twig b/templates/admin/ingest_profile/list.html.twig
new file mode 100644
index 0000000..10c6c1a
--- /dev/null
+++ b/templates/admin/ingest_profile/list.html.twig
@@ -0,0 +1,89 @@
+{% extends 'admin/base.html.twig' %}
+
+{% block title %}Ingest Profiles{% endblock %}
+
+{% block body %}
+    <h1>Ingest Profiles</h1>
+
+    {% if structureMismatch %}
+        <div class="alert alert-danger">
+            ⚠ Strukturabweichung festgestellt – Globale Neuindizierung erforderlich | <a href="{{ path('admin_jobs') }}">Global Reindex aufrufen</a>
+        </div>
+    {% else %}
+        <div class="alert alert-success">
+            ✅ Die Indexstruktur entspricht dem aktiven Profil
+        </div>
+    {% endif %}
+
+    <p><a class="btn btn-outline-light" href="{{ path('admin_ingest_profile_create') }}">+ Neues Profil anlegen</a></p>
+
+    <h2>Profiles</h2>
+
+    <table border="1" cellpadding="6" class="table table-sm table-dark align-middle">
+        <tr>
+            <th>Version</th>
+            <th>Chunk Size</th>
+            <th>Overlap</th>
+            <th>Model</th>
+            <th>Dimension</th>
+            <th>Scoring</th>
+            <th>Active</th>
+            <th>Reindex Required</th>
+            <th>Actions</th>
+        </tr>
+
+        {% for p in profiles %}
+            <tr>
+                <td>{{ p.version }}</td>
+                <td>{{ p.chunkSize }}</td>
+                <td>{{ p.chunkOverlap }}</td>
+                <td>{{ p.embeddingModel }}</td>
+                <td>{{ p.embeddingDimension }}</td>
+                <td>{{ p.scoringVersion }}</td>
+                <td>{{ p.active ? 'Yes' : 'No' }}</td>
+                <td>{{ p.reindexRequired ? 'Yes' : 'No' }}</td>
+                <td>
+                    {% if not p.active %}
+                        <a class="btn btn-outline-info btn-sm" href="{{ path('admin_ingest_profile_activate', {id: p.id}) }}">
+                            Aktivieren
+                        </a>
+                    {% endif %}
+                </td>
+            </tr>
+        {% endfor %}
+    </table>
+
+    <hr>
+    <h2>Index-Struktur-Profil Diff</h2>
+
+    {% if indexMeta %}
+        <p><strong>Index Version:</strong> {{ indexMeta.index_version }}</p>
+    {% else %}
+        <p>No index_meta.json found.</p>
+    {% endif %}
+
+    <table border="1" cellpadding="6" class="table table-sm table-dark align-middle">
+        <tr>
+            <th>Parameter</th>
+            <th>Index Meta</th>
+            <th>Active Profile</th>
+            <th>Status</th>
+        </tr>
+
+        {% for key, row in diff %}
+            <tr>
+                <td>{{ key }}</td>
+                <td>{{ row.meta }}</td>
+                <td>{{ row.profile }}</td>
+                <td>
+                    {% if row.equal %}
+                        <span style="color:green;">✓</span>
+                    {% else %}
+                        <span style="color:red;">✗</span>
+                    {% endif %}
+                </td>
+            </tr>
+        {% endfor %}
+    </table>
+
+{% endblock %}
diff --git a/templates/admin/job/index.html.twig b/templates/admin/job/index.html.twig
index 083cbf4..eb86322 100644
--- a/templates/admin/job/index.html.twig
+++ b/templates/admin/job/index.html.twig
@@ -4,7 +4,7 @@
 
 {% block body %}
 
-    <h1 class="h4 mb-4">Ingest Jobs</h1>
+    <h1 class="h4 mb-4">Indexierung (Ingest Jobs-Liste)</h1>
 
     <form method="post"
           action="{{ path('admin_global_reindex') }}"
diff --git a/templates/admin/system/agent_overview.html.twig b/templates/admin/system/agent_overview.html.twig
index 083b1dc..b39b6ce 100644
--- a/templates/admin/system/agent_overview.html.twig
+++ b/templates/admin/system/agent_overview.html.twig
@@ -1,6 +1,6 @@
 {% extends 'admin/base.html.twig' %}
 
-{% block title %}Agent System Overview{% endblock %}
+{% block title %}Wissensdaten (Chunk-Index){% endblock %}
 
 {% block body %}
 
@@ -9,7 +9,7 @@
         ← Zurück
     </a>
 
-    <h1 class="h4 mb-4">Agent System Overview</h1>
+    <h1 class="h4 mb-4">Wissensdaten (Chunk-Index)</h1>
 
     {# ============================= #}
     {# Index Meta Section           #}