new config PromptBuilderConfig.php

src/Agent/PromptBuilder.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Agent;
 
 use App\Commerce\Dto\ShopProductResult;
+use App\Config\PromptBuilderConfig;
 use App\Context\ContextService;
 use App\Repository\SystemPromptRepository;
 use App\Service\ModelGenerationConfigProvider;
@@ -13,95 +14,6 @@ use RuntimeException;
 
 final readonly class PromptBuilder
 {
-    /**
-     * Approximate character-to-token ratio for conservative prompt budgeting.
-     */
-    private const CHARS_PER_TOKEN = 4;
-
-    /**
-     * Keep a small gap so history does not consume the last available prompt space.
-     */
-    private const HISTORY_PADDING_CHARS = 400;
-
-    /**
-     * Reserve some space for the model output.
-     */
-    private const OUTPUT_RESERVE_RATIO = 0.25;
-    private const OUTPUT_RESERVE_MIN_TOKENS = 768;
-    private const OUTPUT_RESERVE_MAX_TOKENS = 6000;
-
-    /**
-     * Reserve a small safety buffer to avoid hitting the context limit too tightly.
-     */
-    private const SAFETY_RESERVE_RATIO = 0.05;
-    private const SAFETY_RESERVE_MIN_TOKENS = 256;
-    private const SAFETY_RESERVE_MAX_TOKENS = 1024;
-
-    /**
-     * Ensure the prompt budget never collapses completely on smaller models.
-     */
-    private const MIN_PROMPT_BUDGET_TOKENS = 1024;
-
-    /**
-     * Limit how many ranked shop results are passed into the final prompt.
-     * The shop search may return many candidates, but the LLM should only see
-     * the most relevant top subset after local reranking.
-     */
-    private const MAX_SHOP_RESULTS_IN_PROMPT = 8;
-
-    /**
-     * Technical product prompts should be answered like documentation,
-     * not like sales copy.
-     */
-    private const TECHNICAL_PRODUCT_KEYWORDS = [
-        'technisch',
-        'technical',
-        'produkt',
-        'product',
-        'gerät',
-        'device',
-        'modell',
-        'model',
-        'messprinzip',
-        'measurement principle',
-        'schnittstelle',
-        'interface',
-        'relais',
-        'relay',
-        'indikator',
-        'indicator',
-        'spannung',
-        'voltage',
-        'strom',
-        'current',
-        'druck',
-        'pressure',
-        'temperatur',
-        'temperature',
-        'schutzart',
-        'ip',
-        'fehlercode',
-        'error code',
-        'wasserhärte',
-        'hardness',
-        'testomat',
-    ];
-
-    private const ACCESSORY_REQUEST_KEYWORDS = [
-        'passend',
-        'passende',
-        'passendes',
-        'zubehör',
-        'zubehor',
-        'dazu',
-        'indikator',
-        'reagenz',
-        'kit',
-        'set',
-        'zusatz',
-        'ergänzung',
-        'ergaenzung',
-    ];
 
     public function __construct(
         private ContextService $contextService,
@@ -257,7 +169,7 @@ final readonly class PromptBuilder
         }
 
         $totalCount = count($normalizedShopResults);
-        $limitedShopResults = array_slice($normalizedShopResults, 0, self::MAX_SHOP_RESULTS_IN_PROMPT);
+        $limitedShopResults = array_slice($normalizedShopResults, 0, PromptBuilderConfig::MAX_SHOP_RESULTS_IN_PROMPT);
         $isDetailed = count($limitedShopResults) <= 5;
         $lines = [];
 
@@ -440,27 +352,27 @@ final readonly class PromptBuilder
         $numCtx = $this->modelGenerationConfigProvider->getActiveNumCtx();
 
         $outputReserveTokens = $this->clamp(
-            (int) floor($numCtx * self::OUTPUT_RESERVE_RATIO),
-            self::OUTPUT_RESERVE_MIN_TOKENS,
-            self::OUTPUT_RESERVE_MAX_TOKENS
+            (int) floor($numCtx * PromptBuilderConfig::OUTPUT_RESERVE_RATIO),
+            PromptBuilderConfig::OUTPUT_RESERVE_MIN_TOKENS,
+            PromptBuilderConfig::OUTPUT_RESERVE_MAX_TOKENS
         );
 
         $safetyReserveTokens = $this->clamp(
-            (int) floor($numCtx * self::SAFETY_RESERVE_RATIO),
-            self::SAFETY_RESERVE_MIN_TOKENS,
-            self::SAFETY_RESERVE_MAX_TOKENS
+            (int) floor($numCtx * PromptBuilderConfig::SAFETY_RESERVE_RATIO),
+            PromptBuilderConfig::SAFETY_RESERVE_MIN_TOKENS,
+            PromptBuilderConfig::SAFETY_RESERVE_MAX_TOKENS
         );
 
         $promptBudgetTokens = max(
-            self::MIN_PROMPT_BUDGET_TOKENS,
+            PromptBuilderConfig::MIN_PROMPT_BUDGET_TOKENS,
             $numCtx - $outputReserveTokens - $safetyReserveTokens
         );
 
-        $promptBudgetChars = $promptBudgetTokens * self::CHARS_PER_TOKEN;
+        $promptBudgetChars = $promptBudgetTokens * PromptBuilderConfig::CHARS_PER_TOKEN;
 
         $remaining = $promptBudgetChars
             - mb_strlen($fixedPrompt)
-            - self::HISTORY_PADDING_CHARS;
+            - PromptBuilderConfig::HISTORY_PADDING_CHARS;
 
         return max(0, $remaining);
     }
@@ -577,7 +489,7 @@ final readonly class PromptBuilder
 
         $matches = 0;
 
-        foreach (self::TECHNICAL_PRODUCT_KEYWORDS as $keyword) {
+        foreach (PromptBuilderConfig::TECHNICAL_PRODUCT_KEYWORDS as $keyword) {
             if (str_contains($normalized, $keyword)) {
                 $matches++;
             }
@@ -594,7 +506,7 @@ final readonly class PromptBuilder
     {
         $normalized = mb_strtolower($prompt, 'UTF-8');
 
-        foreach (self::ACCESSORY_REQUEST_KEYWORDS as $keyword) {
+        foreach (PromptBuilderConfig::ACCESSORY_REQUEST_KEYWORDS as $keyword) {
             if (str_contains($normalized, $keyword)) {
                 return true;
             }