new config PromptBuilderConfig.php

src/Config/PromptBuilderConfig.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace App\Config;
+
+class PromptBuilderConfig{
+    /**
+     * Approximate character-to-token ratio for conservative prompt budgeting.
+     */
+    public const CHARS_PER_TOKEN = 4;
+
+    /**
+     * Keep a small gap so history does not consume the last available prompt space.
+     */
+    public const HISTORY_PADDING_CHARS = 400;
+
+    /**
+     * Reserve some space for the model output.
+     */
+    public const OUTPUT_RESERVE_RATIO = 0.25;
+    public const OUTPUT_RESERVE_MIN_TOKENS = 768;
+    public const OUTPUT_RESERVE_MAX_TOKENS = 6000;
+
+    /**
+     * Reserve a small safety buffer to avoid hitting the context limit too tightly.
+     */
+    public const SAFETY_RESERVE_RATIO = 0.05;
+    public const SAFETY_RESERVE_MIN_TOKENS = 256;
+    public const SAFETY_RESERVE_MAX_TOKENS = 1024;
+
+    /**
+     * Ensure the prompt budget never collapses completely on smaller models.
+     */
+    public 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.
+     */
+    public const MAX_SHOP_RESULTS_IN_PROMPT = 10;
+
+    /**
+     * Technical product prompts should be answered like documentation,
+     * not like sales copy.
+     */
+    public 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',
+    ];
+
+    public const ACCESSORY_REQUEST_KEYWORDS = [
+        'passend',
+        'passende',
+        'passendes',
+        'zubehör',
+        'zubehor',
+        'dazu',
+        'indikator',
+        'reagenz',
+        'kit',
+        'set',
+        'zusatz',
+        'ergänzung',
+        'ergaenzung',
+    ];
+
+}