[model] support hunyuan-mt model (#9284)

Co-authored-by: wyfdgg <liwenkun0812@163.com>
Co-authored-by: Yaowei Zheng <hiyouga@buaa.edu.cn>

src/llamafactory/data/template.py

@@ -1201,10 +1201,10 @@ register_template(
 
 register_template(
     name="hunyuan",
-    format_user=StringFormatter(slots=["<|bos|>user\n{{content}}<|eos|>\n<|bos|>assistant\n"]),
-    format_assistant=StringFormatter(slots=["{{content}}<|eos|>\n"]),
-    format_system=StringFormatter(slots=["<|bos|>system\n{{content}}<|eos|>\n"]),
-    format_prefix=EmptyFormatter(slots=["<|bos|>"]),
+    format_user=StringFormatter(slots=["{{content}}<|extra_0|>"]),
+    format_assistant=StringFormatter(slots=["{{content}}<|eos|>"]),
+    format_system=StringFormatter(slots=["{{content}}<|extra_4|>"]),
+    format_prefix=EmptyFormatter(slots=["<|startoftext|>"]),
     stop_words=["<|eos|>"],
 )
 

src/llamafactory/extras/constants.py

@@ -1152,6 +1152,10 @@ register_model_group(
             DownloadSource.DEFAULT: "tencent/Hunyuan-7B-Instruct",
             DownloadSource.MODELSCOPE: "AI-ModelScope/Hunyuan-7B-Instruct",
         },
+        "Hunyuan-MT-7B-Instruct": {
+            DownloadSource.DEFAULT: "tencent/Hunyuan-MT-7B",
+            DownloadSource.MODELSCOPE: "Tencent-Hunyuan/Hunyuan-MT-7B",
+        },
     },
     template="hunyuan",
 )