Make 'raw' mutually exclusive with 'prompt' and 'inject'

When 'raw' is used, skip the 'prompt', 'inject', and 'stop' handlers
since raw mode handles everything separately. This was causing
double assistant headers and corrupted prompts.

coderai

@@ -1946,7 +1946,8 @@ async def chat_completions(request: ChatCompletionRequest, http_request: Request
             print(f"CHAT: Reasoning API param enabled")
     
     # Handle 'inject' - system prompt injection
-    if "inject" in force_reasoning_args:
+    # Skip for 'raw' mode since it handles everything separately
+    if "raw" not in force_reasoning_args and "inject" in force_reasoning_args:
         from codai.models.templates import AgenticTemplateManager
         template_manager = AgenticTemplateManager(request.model)
         
@@ -1981,7 +1982,8 @@ async def chat_completions(request: ChatCompletionRequest, http_request: Request
             print(f"--- END SYSTEM PROMPT ---")
     
     # Handle 'prompt' - prompt seeding (ends with thought tag)
-    if "prompt" in force_reasoning_args:
+    # Note: 'prompt' and 'raw' are mutually exclusive - raw bypasses this
+    if "prompt" in force_reasoning_args and "raw" not in force_reasoning_args:
         from codai.models.templates import AgenticTemplateManager
         template_manager = AgenticTemplateManager(request.model)
         
@@ -2021,7 +2023,8 @@ async def chat_completions(request: ChatCompletionRequest, http_request: Request
             stop_sequences = list(request.stop)
     
     # Handle 'stop' - add reasoning stop tokens (also done for 'inject' and 'prompt')
-    if "stop" in force_reasoning_args or "inject" in force_reasoning_args or "prompt" in force_reasoning_args:
+    # Skip for 'raw' mode since it handles stop tokens separately
+    if "raw" not in force_reasoning_args and ("stop" in force_reasoning_args or "inject" in force_reasoning_args or "prompt" in force_reasoning_args):
         _, _, additional_stops = get_reasoning_stop_tokens(model_family)
         for stop_token in additional_stops:
             if stop_token not in stop_sequences: