[Misc] Provide a DeepSeek ReasoningParser with thinking enabled by default

tests/reasoning/test_holo2_reasoning_parser.py

@@ -6,7 +6,9 @@
 from tests.reasoning.utils import run_reasoning_extraction
 from vllm.reasoning import ReasoningParser, ReasoningParserManager
 from vllm.reasoning.deepseek_r1_reasoning_parser import DeepSeekR1ReasoningParser
-from vllm.reasoning.holo2_reasoning_parser import Holo2ReasoningParser
+from vllm.reasoning.deepseek_v3_reasoning_parser import (
+    DeepSeekV3ReasoningWithThinkingParser as Holo2ReasoningParser,
+)
 from vllm.reasoning.identity_reasoning_parser import IdentityReasoningParser
 
 REASONING_MODEL_NAME = "HCompany/Holo2-4B"

vllm/reasoning/__init__.py

@@ -33,8 +33,8 @@
         "Ernie45ReasoningParser",
     ),
     "glm45": (
-        "glm4_moe_reasoning_parser",
-        "Glm4MoeModelReasoningParser",
+        "deepseek_v3_reasoning_parser",
+        "DeepSeekV3ReasoningWithThinkingParser",
     ),
     "openai_gptoss": (
         "gptoss_reasoning_parser",
@@ -45,16 +45,16 @@
         "GraniteReasoningParser",
     ),
     "holo2": (
-        "holo2_reasoning_parser",
-        "Holo2ReasoningParser",
+        "deepseek_v3_reasoning_parser",
+        "DeepSeekV3ReasoningWithThinkingParser",
     ),
     "hunyuan_a13b": (
         "hunyuan_a13b_reasoning_parser",
         "HunyuanA13BReasoningParser",
     ),
     "kimi_k2": (
-        "kimi_k2_reasoning_parser",
-        "KimiK2ReasoningParser",
+        "deepseek_v3_reasoning_parser",
+        "DeepSeekV3ReasoningWithThinkingParser",
     ),
     "minimax_m2": (
         "minimax_m2_reasoning_parser",

vllm/reasoning/deepseek_v3_reasoning_parser.py

@@ -70,3 +70,19 @@ def extract_reasoning_streaming(
             current_token_ids,
             delta_token_ids,
         )
+
+
+class DeepSeekV3ReasoningWithThinkingParser(DeepSeekV3ReasoningParser):
+    """
+    DeepSeekV3ReasoningParser that defaults to thinking mode.
+    """
+
+    def __init__(self, tokenizer: PreTrainedTokenizerBase, *args, **kwargs):
+        chat_kwargs = kwargs.get("chat_template_kwargs", {}) or {}
+        thinking = chat_kwargs.get("thinking", None)
+        enable_thinking = chat_kwargs.get("enable_thinking", None)
+        if thinking is None and enable_thinking is None:
+            chat_kwargs["thinking"] = True
+            chat_kwargs["enable_thinking"] = True
+            kwargs["chat_template_kwargs"] = chat_kwargs
+        super().__init__(tokenizer, *args, **kwargs)