[model] add Hy-MT2-1.8B/7B support (#10605)

src/llamafactory/data/template.py

@@ -1274,6 +1274,30 @@ register_template(
 )
 
 
+# The following two templates are copied from the official Hy-MT2 chat templates:
+# https://github.com/Tencent-Hunyuan/Hy-MT2/blob/main/train/llama_factory_support/hy_dense_template.py
+register_template(
+    name="hy_dense_1_8b",
+    format_user=StringFormatter(slots=["<｜hy_User｜>{{content}}"]),
+    format_assistant=StringFormatter(slots=["<｜hy_Assistant｜>{{content}}"]),
+    format_system=StringFormatter(slots=["{{content}}<｜hy_place▁holder▁no▁3｜>"]),
+    format_prefix=EmptyFormatter(slots=[{"bos_token"}]),
+    stop_words=["<｜hy_place▁holder▁no▁2｜>"],
+    efficient_eos=True,
+)
+
+
+register_template(
+    name="hy_dense_7b",
+    format_user=StringFormatter(slots=["{{content}}<|extra_0|>"]),
+    format_assistant=StringFormatter(slots=["{{content}}"]),
+    format_system=StringFormatter(slots=["{{content}}<|extra_4|>"]),
+    format_prefix=EmptyFormatter(slots=[{"bos_token"}]),
+    stop_words=["<|eos|>"],
+    efficient_eos=True,
+)
+
+
 register_template(
     name="intern2",
     format_user=StringFormatter(slots=["<|im_start|>user\n{{content}}<|im_end|>\n<|im_start|>assistant\n"]),

src/llamafactory/extras/constants.py

@@ -1248,6 +1248,28 @@ register_model_group(
 )
 
 
+register_model_group(
+    models={
+        "Hy-MT2-1.8B-Instruct": {
+            DownloadSource.DEFAULT: "tencent/Hy-MT2-1.8B",
+            DownloadSource.MODELSCOPE: "Tencent-Hunyuan/Hy-MT2-1.8B",
+        },
+    },
+    template="hy_dense_1_8b",
+)
+
+
+register_model_group(
+    models={
+        "Hy-MT2-7B-Instruct": {
+            DownloadSource.DEFAULT: "tencent/Hy-MT2-7B",
+            DownloadSource.MODELSCOPE: "Tencent-Hunyuan/Hy-MT2-7B",
+        },
+    },
+    template="hy_dense_7b",
+)
+
+
 register_model_group(
     models={
         "HY-MT1.5-1.8B-Instruct": {