diff --git a/src/classifier.py b/src/classifier.py
index 5ff42ce..638b082 100644
--- a/src/classifier.py
+++ b/src/classifier.py
@@ -78,15 +78,17 @@ def _build_prompt(
         """
         Build classification prompt from the template.
 
-        This method is shared between all classifier implementations
-        and uses the prompt_template attribute that should be set
-        during initialization.
+        This default implementation uses the prompt_template attribute
+        with placeholders for char_list, player_list, prev_text,
+        current_text, and next_text.
+
+        Subclasses can override this method to customize prompt building.
 
         Args:
-            prev_text: Previous segment text for context
-            current_text: Current segment text to classify
-            next_text: Next segment text for context
-            character_names: List of character names in the campaign
+            prev_text: Text from previous segment
+            current_text: Text from current segment to classify
+            next_text: Text from next segment
+            character_names: List of character names
             player_names: List of player names
 
         Returns:
@@ -111,16 +113,19 @@ def _parse_response(
         """
         Parse LLM response into ClassificationResult.
 
-        This method handles the standard response format used by all
-        classifier implementations:
-        - Classificatie: IC/OOC/MIXED
-        - Reden: reasoning text
-        - Vertrouwen: confidence score (0.0-1.0)
-        - Personage: character name (or N/A)
+        This default implementation parses responses in the format:
+        - Classificatie: IC|OOC|MIXED
+        - Reden: <reasoning text>
+        - Vertrouwen: <confidence value 0.0-1.0>
+        - Personage: <character name or N/A>
+
+        The field names are language-specific (Dutch by default).
+        Subclasses can override this method to support different formats
+        or languages.
 
         Args:
-            response: Raw text response from the LLM
-            index: Segment index for the classification result
+            response: Raw response text from LLM
+            index: Segment index for logging purposes
 
         Returns:
             ClassificationResult with parsed values
@@ -130,41 +135,53 @@ def _parse_response(
         reasoning = "Could not parse response"
         character = None
 
-        lines = response.strip().split('\n')
-        for line in lines:
-            parts = line.strip().split(":", 1)
-            if len(parts) != 2:
-                continue
-
-            key, value = parts[0].strip(), parts[1].strip()
-
-            if key == "Classificatie":
-                try:
-                    classification = Classification(value.upper())
-                except ValueError:
-                    if hasattr(self, 'logger'):
-                        self.logger.warning(
-                            "Invalid classification '%s' for segment %s, defaulting to IC",
-                            value,
-                            index
-                        )
-                    classification = Classification.IN_CHARACTER
-            elif key == "Reden":
-                reasoning = value
-            elif key == "Vertrouwen":
-                try:
-                    confidence = float(value)
-                    confidence = ConfidenceDefaults.clamp(confidence)
-                except ValueError:
-                    if hasattr(self, 'logger'):
-                        self.logger.warning(
-                            "Invalid confidence value '%s' for segment %s, using default",
-                            value,
-                            index
-                        )
-            elif key == "Personage":
-                if value.upper() != "N/A":
-                    character = value
+        # Use regex to extract fields more robustly
+        # This handles multi-line values and out-of-order fields
+        import re
+
+        # Extract classification
+        class_match = re.search(r'Classificatie:\s*(\w+)', response, re.IGNORECASE)
+        if class_match:
+            class_text = class_match.group(1).strip().upper()
+            try:
+                classification = Classification(class_text)
+            except ValueError:
+                self.logger.warning(
+                    "Invalid classification '%s' for segment %s, defaulting to IC",
+                    class_text,
+                    index
+                )
+                classification = Classification.IN_CHARACTER
+
+        # Extract reasoning - capture everything after "Reden:" until next field or end
+        reden_match = re.search(
+            r'Reden:\s*(.+?)(?=(?:Vertrouwen:|Personage:|$))',
+            response,
+            re.DOTALL | re.IGNORECASE
+        )
+        if reden_match:
+            reasoning = reden_match.group(1).strip()
+
+        # Extract confidence
+        conf_match = re.search(r'Vertrouwen:\s*([\d.]+)', response, re.IGNORECASE)
+        if conf_match:
+            try:
+                conf_text = conf_match.group(1).strip()
+                confidence = float(conf_text)
+                confidence = ConfidenceDefaults.clamp(confidence)
+            except ValueError:
+                self.logger.warning(
+                    "Invalid confidence value '%s' for segment %s, using default.",
+                    conf_text,
+                    index
+                )
+
+        # Extract character name
+        char_match = re.search(r'Personage:\s*(.+?)(?:\n|$)', response, re.IGNORECASE)
+        if char_match:
+            char_text = char_match.group(1).strip()
+            if char_text.upper() != "N/A":
+                character = char_text
 
         return ClassificationResult(
             segment_index=index,
@@ -526,6 +543,37 @@ def __init__(self, api_key: str = None, model: str = "llama-3.3-70b-versatile"):
             burst_size=Config.GROQ_RATE_LIMIT_BURST,
         )
 
+    def preflight_check(self):
+        """Check that Groq API is accessible and configured."""
+        issues = []
+
+        if not self.api_key:
+            issues.append(
+                PreflightIssue(
+                    component="classifier",
+                    message="Groq API key not configured. Set GROQ_API_KEY in .env",
+                    severity="error",
+                )
+            )
+            return issues
+
+        # Test API connectivity with a simple request
+        try:
+            test_response = self.client.chat.completions.create(
+                messages=[{"role": "user", "content": "test"}],
+                model=self.model,
+            )
+        except Exception as exc:
+            issues.append(
+                PreflightIssue(
+                    component="classifier",
+                    message=f"Groq API test failed: {exc}",
+                    severity="error",
+                )
+            )
+
+        return issues
+
     def classify_segments(
         self,
         segments: List[Dict],