[Model] Add ToolParser for Hunyuan A13B.

- add stream and non stream support
- reason parser use regex package.
- reason parser: add missing function.

Signed-off-by: Asher Zhang <asherszhang@tencent.com>

Author: kzjeef

vllm/entrypoints/openai/serving_chat.py

@@ -630,8 +630,13 @@ async def chat_completion_stream_generator(
                         previous_text = previous_texts[i]
                         previous_token_ids = all_previous_token_ids[i]
                         current_text = previous_text + delta_text
-                        current_token_ids = previous_token_ids + list(
-                            output.token_ids)
+
+                        # avoid the None + list error.
+                        if previous_token_ids:
+                            current_token_ids = previous_token_ids + list(
+                                output.token_ids)
+                        else:
+                            current_token_ids = list(output.token_ids)
 
                     # handle streaming deltas for tools with named tool_choice
                     if tool_choice_function_name:
@@ -1094,9 +1099,17 @@ async def chat_completion_full_generator(
                 else:
                     # FOR NOW make it a chat message; we will have to detect
                     # the type to make it later.
+                    ret_content = content
+
+                    # try to use content return from tool parser first,
+                    # tool parser may do some modify for the content.
+                    if (tool_call_info.content
+                            and len(tool_call_info.content) > 0):
+                        ret_content = tool_call_info.content
+
                     message = ChatMessage(role=role,
                                           reasoning_content=reasoning_content,
-                                          content=content)
+                                          content=ret_content)
 
             # undetermined case that is still important to handle
             else:

vllm/entrypoints/openai/tool_parsers/__init__.py

@@ -6,6 +6,7 @@
 from .granite_20b_fc_tool_parser import Granite20bFCToolParser
 from .granite_tool_parser import GraniteToolParser
 from .hermes_tool_parser import Hermes2ProToolParser
+from .hunyuan_a13b_tool_parser import HunyuanA13BToolParser
 from .internlm2_tool_parser import Internlm2ToolParser
 from .jamba_tool_parser import JambaToolParser
 from .kimi_k2_tool_parser import KimiK2ToolParser
@@ -23,5 +24,5 @@
     "Internlm2ToolParser", "Llama3JsonToolParser", "JambaToolParser",
     "Llama4PythonicToolParser", "PythonicToolParser", "Phi4MiniJsonToolParser",
     "DeepSeekV3ToolParser", "xLAMToolParser", "MinimaxToolParser",
-    "KimiK2ToolParser"
+    "KimiK2ToolParser", "HunyuanA13BToolParser"
 ]