[model] support granite4 (#8680)

src/llamafactory/data/template.py

@@ -1071,6 +1071,23 @@ register_template(
 )
 
 
+register_template(
+    name="granite4",
+    format_user=StringFormatter(
+        slots=[
+            "<|start_of_role|>user<|end_of_role|>{{content}}<|end_of_text|>\n<|start_of_role|>assistant<|end_of_role|>"
+        ]
+    ),
+    format_assistant=StringFormatter(slots=["{{content}}<|end_of_text|>\n"]),
+    format_system=StringFormatter(slots=["<|start_of_role|>system<|end_of_role|>{{content}}<|end_of_text|>\n"]),
+    format_function=FunctionFormatter(slots=["{{content}}<|end_of_text|>\n"], tool_format="default"),
+    format_observation=StringFormatter(slots=["<|start_of_role|>tool<|end_of_role|>{{content}}<|end_of_text|>\n<|start_of_role|>assistant\n"]),
+    format_tools=ToolFormatter(tool_format="default"),
+    stop_words=["<|end_of_text|>"],
+    default_system=("You are Granite, developed by IBM. You are a helpful AI assistant.")
+)
+
+
 register_template(
     name="index",
     format_user=StringFormatter(slots=["reserved_0{{content}}reserved_1"]),