diff --git a/RETRIEX_PATCH_10_RETRIEVAL_CONFIG_YAML_ONLY_README.md b/RETRIEX_PATCH_10_RETRIEVAL_CONFIG_YAML_ONLY_README.md
new file mode 100644
index 0000000..3c37ef7
--- /dev/null
+++ b/RETRIEX_PATCH_10_RETRIEVAL_CONFIG_YAML_ONLY_README.md
@@ -0,0 +1,60 @@
+# RetrieX Patch 10 - NdjsonHybridRetrieverConfig YAML-only
+
+## Ziel
+
+Dieser Patch entfernt die verbliebenen PHP-Defaults aus `NdjsonHybridRetrieverConfig`.
+
+Die Retrieval-Werte liegen bereits in `config/retriex/retrieval.yaml`. PHP liest diese Werte jetzt als Pflichtkonfiguration und wirft bei fehlenden oder ungültigen Werten klare Exceptions, statt still auf PHP-Konstanten zurückzufallen.
+
+## Geändert
+
+- `src/Config/NdjsonHybridRetrieverConfig.php`
+
+## YAML-only
+
+Umgestellt wurden:
+
+- Retrieval-Limits und Thresholds
+- RRF-/Keyword-Gewichte
+- Dominant-/Focused-Document-Werte
+- Retrieval-Tokenlisten:
+  - `generic_product_tokens`
+  - `important_short_model_tokens`
+  - `family_descriptor_tokens`
+  - `looks_like_reagent_tokens`
+  - `looks_like_safety_docs`
+  - `looks_like_reagent_words`
+  - `looks_like_document_words`
+  - `looks_like_safety_words`
+  - `looks_like_device_words`
+
+## Nicht geändert
+
+- keine Änderung an `retrieval.yaml`
+- keine Änderung an Retrieval-Algorithmus oder Scoring-Logik
+- keine Änderung an PromptBuilder
+- keine Änderung an Commerce/Shop
+- keine Änderung an AgentRunner
+- keine Änderung an SSE/Frontend
+
+## Wichtig
+
+Die YAML-Werte waren bereits vorhanden. Der Patch entfernt nur die PHP-Fallback-Ebene.
+
+## Nach dem Einspielen prüfen
+
+```bash
+php bin/console cache:clear
+php bin/console mto:agent:config:validate
+php bin/console mto:agent:config:audit-source --details
+php bin/console mto:agent:regression:test
+```
+
+Erwartung:
+
+- `NdjsonHybridRetrieverConfig` taucht nicht mehr als `yaml_with_php_fallback` auf.
+- Die Regression bleibt grün, insbesondere:
+  - `important_short_model_token_th/tc/tp/tm/ph/rx`
+  - `retrieval_reagent_word_indikator`
+  - `retrieval_device_word_geraet`
+  - Testomat-808-/Indikator-300-Baseline
diff --git a/src/Config/NdjsonHybridRetrieverConfig.php b/src/Config/NdjsonHybridRetrieverConfig.php
index ce85e6d..e72d1b5 100644
--- a/src/Config/NdjsonHybridRetrieverConfig.php
+++ b/src/Config/NdjsonHybridRetrieverConfig.php
@@ -4,358 +4,192 @@ declare(strict_types=1);
 
 namespace App\Config;
 
+use InvalidArgumentException;
+
 final class NdjsonHybridRetrieverConfig
 {
-    /**
-     * Maximum number of chunks the retriever may finally hand to the model.
-     *
-     * Rationale:
-     * - enough room for the stronger hybrid pipeline
-     * - still conservative enough to avoid prompt bloat
-     */
-    public const HARD_MAX_CHUNKS = 6;
-
-    /**
-     * Hard upper bound for vector retrieval candidate size.
-     *
-     * Rationale:
-     * - the pipeline now combines primary vector, secondary vector,
-     *   lexical, scoped retrieval and re-ranking
-     * - the old limit would constrain recall too early
-     * - still capped to keep latency controlled
-     */
-    public const HARD_MAX_VECTORK = 18;
-
-    /**
-     * Default semantic score threshold for vector hits.
-     *
-     * Rationale:
-     * - slightly relaxed compared to stricter pure-vector setups
-     * - the system now has more safeguards:
-     *   lexical cross-signals, scoped retrieval, title/meta boost, selection rules
-     */
-    public const VECTOR_SCORE_THRESHOLD = 0.83;
-
-    /**
-     * Lower safety boundary for dynamic threshold adjustments.
-     *
-     * Rationale:
-     * - prevents the system from getting too noisy in fallback cases
-     * - still allows recovery when exact signals are sparse
-     */
-    public const THRESHOLD_FLOOR = 0.75;
-
-    /**
-     * Upper safety boundary for dynamic threshold adjustments.
-     *
-     * Rationale:
-     * - protects objection/pricing/list adjustments from becoming too strict
-     * - keeps retrieval from collapsing into empty result sets too easily
-     */
-    public const THRESHOLD_CEIL = 0.90;
-
-    /**
-     * Additional candidate expansion factor for list-like prompts.
-     *
-     * Rationale:
-     * - list requests benefit from wider candidate recall
-     * - too high would create noise across multiple retrieval channels
-     */
-    public const LIST_BONUS = 1.35;
-
-    /**
-     * Reciprocal Rank Fusion constant.
-     *
-     * Rationale:
-     * - keep rank importance meaningful
-     * - but not so aggressive that one retrieval source dominates too hard
-     */
-    public const RRF_K = 50;
-
-    /**
-     * Keyword retrieval is fused with vector retrieval as a factual safety net.
-     * It protects exact values, ranges, thresholds, model codes and domain terms
-     * that semantic retrieval can miss or rank too low.
-     */
-    public const HARD_MAX_KEYWORDK = 36;
-    public const KEYWORD_TOPK_MULTIPLIER = 2.0;
-    public const KEYWORD_SCORE_THRESHOLD = 0.35;
-    public const KEYWORD_RRF_WEIGHT = 1.15;
-    public const SCOPED_VECTOR_RRF_WEIGHT = 1.20;
-    public const SCOPED_KEYWORD_RRF_WEIGHT = 1.30;
-
-    /**
-     * Fallback size when thresholded fusion yields no candidates.
-     *
-     * Rationale:
-     * - slightly larger safety net for the richer hybrid stack
-     * - helps no-tag and low-signal cases without exploding context
-     */
-    public const EMPTY_RRF_FALLBACK_TOPN = 1;
-
-    /**
-     * Maximum number of chunks allowed from one document in spread mode.
-     *
-     * Rationale:
-     * - preserve diversity across documents
-     * - still allow coherent multi-chunk retrieval from strong sources
-     */
-    public const MAX_CHUNKS_PER_DOC = 2;
-
-    /**
-     * Minimum distance between chunk indices from the same document
-     * during spread-style selection.
-     *
-     * Rationale:
-     * - reduce near-duplicate neighboring chunks
-     * - still allow relevant continuation when needed
-     */
-    public const MIN_CHUNK_DISTANCE = 2;
-
-    /**
-     * When one document clearly dominates the top-ranked window,
-     * temporarily switch from "spread" mode to "dominant document" mode.
-     */
-    public const DOMINANT_DOC_WINDOW = 6;
-    public const DOMINANT_DOC_MIN_HITS = 3;
-    public const DOMINANT_DOC_MAX_CHUNKS = 4;
-    public const EXACT_DOCUMENT_MAX_CHUNKS = 6;
-    public const FOCUSED_PRODUCT_WINDOW = 8;
-    public const FOCUSED_PRODUCT_MIN_SCORE = 10.0;
-    public const FOCUSED_PRODUCT_MIN_GAP = 4.0;
-    public const FOCUSED_PRODUCT_MAX_CHUNKS = 4;
-
-    public const GENERIC_PRODUCT_TOKEN = [
-        'produkt', 'produkte', 'produktkarte', 'titel', 'geraet', 'gerät',
-        'messgeraet', 'messgerät', 'wasser', 'haerte', 'härte', 'resthaerte',
-        'resthärte', 'analyse', 'analysator', 'automat', 'online', 'messung',
-        'messen', 'preis', 'preise', 'kosten', 'info', 'infos', 'passend',
-        'richtige', 'richtiges', 'geeignet', 'geeignete', 'welche', 'welcher',
-        'welches', 'brauche', 'suche',
-    ];
-
-    public const IMPORTANT_SHORT_MODEL_TOKEN = ['th', 'tc', 'tp', 'tm', 'ph', 'rx'];
-
-    public const FAMILY_DESCRIPTOR_TOKEN = [
-        'evo', 'eco', 'self', 'clean', 'mini', 'pro', 'plus', 'basic', 'lab',
-        'inline', 'compact', 'panel', 'sc',
-    ];
-
-    public const LOOKS_LIKE_REAGENT_TOKENS = [
-        'indikator', 'reagenz', 'reagens', 'laborchemikalie', 'chemikalie',
-        'sicherheitsdatenblatt', 'sdb', 'msds', 'ufi', 'gebinde', 'flasche',
-        'ersatzteil', 'zubehoer', 'zubehör', 'service set', 'filtereinsatz',
-        'kerzenfilter', 'druckregler',
-    ];
-
-    public const LOOKS_LIKE_SAFETY_DOCS = [
-        'sicherheitsdatenblatt', 'sdb', 'msds', 'gefahrenbewertung',
-        'gefahrenpiktogramm', 'signalwort', 'lagerung', 'transport', 'clp',
-        'kennzeichnung', 'h290', 'pbt', 'vpvb',
-    ];
-
-    public const LOOKS_LIKE_REAGENT_WORDS = [
-        'indikator', 'reagenz', 'reagens', 'chemie', 'chemikalie', 'sdb',
-        'sicherheitsdatenblatt', 'msds', 'flasche', 'gebinde',
-    ];
-
-    public const LOOKS_LIKE_DOCUMENT_WORDS = [
-        'datenblatt', 'dokument', 'pdf', 'handbuch', 'manual', 'beschreibung',
-        'sdb', 'sicherheitsdatenblatt', 'msds',
-    ];
-
-    public const LOOKS_LIKE_SAFETY_WORDS = [
-        'gefahr', 'gefahrgut', 'clp', 'h290', 'sicherheit', 'kennzeichnung',
-        'transport', 'lagerung', 'piktogramm',
-    ];
-
-    public const LOOKS_LIKE_DEVICE_WORDS = [
-        'geraet', 'gerät', 'messgeraet', 'messgerät', 'analysator', 'automat',
-        'messung', 'messen', 'ueberwachung', 'überwachung', 'online', 'monitor',
-    ];
-
     /**
      * @param array<string, mixed> $config
      */
     public function __construct(
         private array $config = [],
-        private readonly ?DomainVocabularyConfig $vocabulary = null,
     ) {
     }
 
     public function hardMaxChunks(): int
     {
-        return $this->intValue('hard_max_chunks', self::HARD_MAX_CHUNKS, 1);
+        return $this->requiredInt('hard_max_chunks', 1);
     }
 
     public function hardMaxVectorK(): int
     {
-        return $this->intValue('hard_max_vectork', self::HARD_MAX_VECTORK, 1);
+        return $this->requiredInt('hard_max_vectork', 1);
     }
 
     public function hardMaxKeywordK(): int
     {
-        return $this->intValue('hard_max_keywordk', self::HARD_MAX_KEYWORDK, 1);
+        return $this->requiredInt('hard_max_keywordk', 1);
     }
 
     public function vectorScoreThreshold(): float
     {
-        return $this->floatValue('vector_score_threshold', self::VECTOR_SCORE_THRESHOLD, 0.0, 1.0);
+        return $this->requiredFloat('vector_score_threshold', 0.0, 1.0);
     }
 
     public function thresholdFloor(): float
     {
-        return $this->floatValue('threshold_floor', self::THRESHOLD_FLOOR, 0.0, 1.0);
+        return $this->requiredFloat('threshold_floor', 0.0, 1.0);
     }
 
     public function thresholdCeil(): float
     {
-        return $this->floatValue('threshold_ceil', self::THRESHOLD_CEIL, 0.0, 1.0);
+        return $this->requiredFloat('threshold_ceil', 0.0, 1.0);
     }
 
     public function listBonus(): float
     {
-        return $this->floatValue('list_bonus', self::LIST_BONUS, 1.0);
+        return $this->requiredFloat('list_bonus', 1.0);
     }
 
     public function rrfK(): int
     {
-        return $this->intValue('rrf_k', self::RRF_K, 1);
+        return $this->requiredInt('rrf_k', 1);
     }
 
     public function keywordTopKMultiplier(): float
     {
-        return $this->floatValue('keyword_topk_multiplier', self::KEYWORD_TOPK_MULTIPLIER, 0.1);
+        return $this->requiredFloat('keyword_topk_multiplier', 0.1);
     }
 
     public function keywordScoreThreshold(): float
     {
-        return $this->floatValue('keyword_score_threshold', self::KEYWORD_SCORE_THRESHOLD, 0.0, 1.0);
+        return $this->requiredFloat('keyword_score_threshold', 0.0, 1.0);
     }
 
     public function keywordRrfWeight(): float
     {
-        return $this->floatValue('keyword_rrf_weight', self::KEYWORD_RRF_WEIGHT, 0.0);
+        return $this->requiredFloat('keyword_rrf_weight', 0.0);
     }
 
     public function scopedVectorRrfWeight(): float
     {
-        return $this->floatValue('scoped_vector_rrf_weight', self::SCOPED_VECTOR_RRF_WEIGHT, 0.0);
+        return $this->requiredFloat('scoped_vector_rrf_weight', 0.0);
     }
 
     public function scopedKeywordRrfWeight(): float
     {
-        return $this->floatValue('scoped_keyword_rrf_weight', self::SCOPED_KEYWORD_RRF_WEIGHT, 0.0);
+        return $this->requiredFloat('scoped_keyword_rrf_weight', 0.0);
     }
 
     public function emptyRrfFallbackTopN(): int
     {
-        return $this->intValue('empty_rrf_fallback_topn', self::EMPTY_RRF_FALLBACK_TOPN, 1);
+        return $this->requiredInt('empty_rrf_fallback_topn', 1);
     }
 
     public function maxChunksPerDoc(): int
     {
-        return $this->intValue('max_chunks_per_doc', self::MAX_CHUNKS_PER_DOC, 1);
+        return $this->requiredInt('max_chunks_per_doc', 1);
     }
 
     public function minChunkDistance(): int
     {
-        return $this->intValue('min_chunk_distance', self::MIN_CHUNK_DISTANCE, 0);
+        return $this->requiredInt('min_chunk_distance', 0);
     }
 
     public function dominantDocWindow(): int
     {
-        return $this->intValue('dominant_doc_window', self::DOMINANT_DOC_WINDOW, 1);
+        return $this->requiredInt('dominant_doc_window', 1);
     }
 
     public function dominantDocMinHits(): int
     {
-        return $this->intValue('dominant_doc_min_hits', self::DOMINANT_DOC_MIN_HITS, 1);
+        return $this->requiredInt('dominant_doc_min_hits', 1);
     }
 
     public function dominantDocMaxChunks(): int
     {
-        return $this->intValue('dominant_doc_max_chunks', self::DOMINANT_DOC_MAX_CHUNKS, 1);
+        return $this->requiredInt('dominant_doc_max_chunks', 1);
     }
 
     public function exactDocumentMaxChunks(): int
     {
-        return $this->intValue('exact_document_max_chunks', self::EXACT_DOCUMENT_MAX_CHUNKS, 1);
+        return $this->requiredInt('exact_document_max_chunks', 1);
     }
 
     public function focusedProductWindow(): int
     {
-        return $this->intValue('focused_product_window', self::FOCUSED_PRODUCT_WINDOW, 1);
+        return $this->requiredInt('focused_product_window', 1);
     }
 
     public function focusedProductMinScore(): float
     {
-        return $this->floatValue('focused_product_min_score', self::FOCUSED_PRODUCT_MIN_SCORE, 0.0);
+        return $this->requiredFloat('focused_product_min_score', 0.0);
     }
 
     public function focusedProductMinGap(): float
     {
-        return $this->floatValue('focused_product_min_gap', self::FOCUSED_PRODUCT_MIN_GAP, 0.0);
+        return $this->requiredFloat('focused_product_min_gap', 0.0);
     }
 
     public function focusedProductMaxChunks(): int
     {
-        return $this->intValue('focused_product_max_chunks', self::FOCUSED_PRODUCT_MAX_CHUNKS, 1);
+        return $this->requiredInt('focused_product_max_chunks', 1);
     }
 
     /** @return string[] */
     public function genericProductTokens(): array
     {
-        return $this->stringList('generic_product_tokens', $this->vocabularyView('retrieval.generic_product_tokens', self::GENERIC_PRODUCT_TOKEN));
+        return $this->requiredStringList('generic_product_tokens');
     }
 
     /** @return string[] */
     public function importantShortModelTokens(): array
     {
-        return $this->stringList('important_short_model_tokens', $this->vocabularyView('retrieval.important_short_model_tokens', self::IMPORTANT_SHORT_MODEL_TOKEN));
+        return $this->requiredStringList('important_short_model_tokens');
     }
 
     /** @return string[] */
     public function familyDescriptorTokens(): array
     {
-        return $this->stringList('family_descriptor_tokens', $this->vocabularyView('retrieval.family_descriptor_tokens', self::FAMILY_DESCRIPTOR_TOKEN));
+        return $this->requiredStringList('family_descriptor_tokens');
     }
 
     /** @return string[] */
     public function looksLikeReagentTokens(): array
     {
-        return $this->stringList('looks_like_reagent_tokens', $this->vocabularyView('retrieval.looks_like_reagent_tokens', self::LOOKS_LIKE_REAGENT_TOKENS));
+        return $this->requiredStringList('looks_like_reagent_tokens');
     }
 
     /** @return string[] */
     public function looksLikeSafetyDocs(): array
     {
-        return $this->stringList('looks_like_safety_docs', $this->vocabularyView('retrieval.looks_like_safety_docs', self::LOOKS_LIKE_SAFETY_DOCS));
+        return $this->requiredStringList('looks_like_safety_docs');
     }
 
     /** @return string[] */
     public function looksLikeReagentWords(): array
     {
-        return $this->stringList('looks_like_reagent_words', $this->vocabularyView('retrieval.looks_like_reagent_words', self::LOOKS_LIKE_REAGENT_WORDS));
+        return $this->requiredStringList('looks_like_reagent_words');
     }
 
     /** @return string[] */
     public function looksLikeDocumentWords(): array
     {
-        return $this->stringList('looks_like_document_words', $this->vocabularyView('retrieval.looks_like_document_words', self::LOOKS_LIKE_DOCUMENT_WORDS));
+        return $this->requiredStringList('looks_like_document_words');
     }
 
     /** @return string[] */
     public function looksLikeSafetyWords(): array
     {
-        return $this->stringList('looks_like_safety_words', $this->vocabularyView('retrieval.looks_like_safety_words', self::LOOKS_LIKE_SAFETY_WORDS));
+        return $this->requiredStringList('looks_like_safety_words');
     }
 
     /** @return string[] */
     public function looksLikeDeviceWords(): array
     {
-        return $this->stringList('looks_like_device_words', $this->vocabularyView('retrieval.looks_like_device_words', self::LOOKS_LIKE_DEVICE_WORDS));
+        return $this->requiredStringList('looks_like_device_words');
     }
+
     /**
      * Effective retrieval vocabulary as a dedicated structure for diagnostics and config dumps.
      *
@@ -418,58 +252,53 @@ final class NdjsonHybridRetrieverConfig
         ];
     }
 
-    private function intValue(string $key, int $default, int $min = PHP_INT_MIN, ?int $max = null): int
+    private function requiredInt(string $key, int $min = PHP_INT_MIN, ?int $max = null): int
     {
-        $value = $this->raw($key, $default);
+        $value = $this->requiredValue($key);
 
         if (!is_numeric($value)) {
-            return $default;
+            throw $this->invalid($key, 'must be numeric');
         }
 
         $value = (int) $value;
-        $value = max($min, $value);
+        if ($value < $min) {
+            throw $this->invalid($key, sprintf('must be greater than or equal to %d', $min));
+        }
 
-        if ($max !== null) {
-            $value = min($max, $value);
+        if ($max !== null && $value > $max) {
+            throw $this->invalid($key, sprintf('must be less than or equal to %d', $max));
         }
 
         return $value;
     }
 
-    private function floatValue(string $key, float $default, float $min = -INF, ?float $max = null): float
+    private function requiredFloat(string $key, float $min = -INF, ?float $max = null): float
     {
-        $value = $this->raw($key, $default);
+        $value = $this->requiredValue($key);
 
         if (!is_numeric($value)) {
-            return $default;
+            throw $this->invalid($key, 'must be numeric');
         }
 
         $value = (float) $value;
-        $value = max($min, $value);
+        if ($value < $min) {
+            throw $this->invalid($key, sprintf('must be greater than or equal to %s', (string) $min));
+        }
 
-        if ($max !== null) {
-            $value = min($max, $value);
+        if ($max !== null && $value > $max) {
+            throw $this->invalid($key, sprintf('must be less than or equal to %s', (string) $max));
         }
 
         return $value;
     }
 
-    /**
-     * @param string[] $default
-     * @return string[]
-     */
     /** @return string[] */
-    private function vocabularyView(string $path, array $fallback): array
+    private function requiredStringList(string $key): array
     {
-        return $this->vocabulary?->view($path, $fallback) ?? $fallback;
-    }
-
-    private function stringList(string $key, array $default): array
-    {
-        $value = $this->raw($key, $default);
+        $value = $this->requiredValue($key);
 
         if (!is_array($value)) {
-            return $default;
+            throw $this->invalid($key, 'must be a list of non-empty strings');
         }
 
         $out = [];
@@ -488,15 +317,29 @@ final class NdjsonHybridRetrieverConfig
             }
         }
 
-        return $out !== [] ? $out : $default;
-    }
-
-    private function raw(string $key, mixed $default): mixed
-    {
-        if (array_key_exists($key, $this->config)) {
-            return $this->config[$key];
+        if ($out === []) {
+            throw $this->invalid($key, 'must contain at least one non-empty string');
         }
 
-        return $default;
+        return $out;
+    }
+
+    private function requiredValue(string $key): mixed
+    {
+        if (!array_key_exists($key, $this->config)) {
+            throw $this->missing($key);
+        }
+
+        return $this->config[$key];
+    }
+
+    private function missing(string $key): InvalidArgumentException
+    {
+        return new InvalidArgumentException(sprintf('RetrieX retrieval config "%s" is missing.', $key));
+    }
+
+    private function invalid(string $key, string $reason): InvalidArgumentException
+    {
+        return new InvalidArgumentException(sprintf('RetrieX retrieval config "%s" %s.', $key, $reason));
     }
 }