Updated validator.py to be Qwn compatible

Since Qwen doesnt use mistral's token tags(like <s>[INST]), we remove them to ensure clean text gen

agents/validator.py

@@ -90,17 +90,25 @@ class ValidatorAgent:
     # ── Stage 2: LLM Gatekeeper ───────────────────────────────────────────────
     # Making _gatekeeper Mistral 7B v02 compatible(it accepts inside <s>[INST] tags only)
     def _gatekeeper(self, clean_text: str) -> bool:
-            """Returns True only if the LLM classifies the text as a legitimate JD."""
-            # Wrap the query in official Mistral v0.2 instruction tags
-            prompt = f"<s>[INST] You are a security verification filter. Your only task is to classify whether the input text is a legitimate job description detailing corporate roles or requirements. Reply with exactly one word: VALID or INVALID.\n\nText:\n{clean_text[:1200]}\n\nResponse: [/INST]"
-    
-            # Give the model up to 40 tokens to output its response clearly
-            raw_response = self._ask(prompt, temperature=0.0, max_tokens=40)
-            
-            print(f"\n--- GATEKEEPER DEBUG --- \nRaw Model Output: '{raw_response}'\n-------------------------\n")
-            
-            verdict = raw_response.strip().upper()
-            return "VALID" in verdict and "INVALID" not in verdict
+        """Returns True only if the LLM classifies the text as a legitimate JD."""
+        # Standardized to plain English text layout for cross-model compatibility
+        prompt = f"""You are a security-hardened automated recruitment verification filter.
+Your ONLY task is to classify whether the text inside the input tags is a legitimate, fully-structured job description containing real duties and organizational requirements.
+
+If legitimate, reply with the exact word: VALID
+If not legitimate, reply with the exact word: INVALID
+
+Text to analyze:
+{clean_text[:1200]}
+
+Your response (VALID or INVALID):"""
+
+        raw_response = self._ask(prompt, temperature=0.0, max_tokens=40)
+        
+        print(f"\n--- GATEKEEPER DEBUG --- \nRaw Model Output: '{raw_response}'\n-------------------------\n")
+        
+        verdict = raw_response.strip().upper()
+        return "VALID" in verdict and "INVALID" not in verdict
 
         
     # ── Stage 3: Profile Extraction ───────────────────────────────────────────