llama : add jinja template for rwkv-world (ggml-org#14665)

* llama : add jinja template for rwkv-world

Signed-off-by: Molly Sophia <mollysophia379@gmail.com>

* Update convert_hf_to_gguf.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

---------

Signed-off-by: Molly Sophia <mollysophia379@gmail.com>
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

Author: MollySophia

convert_hf_to_gguf.py

@@ -1082,7 +1082,14 @@ def _set_vocab_rwkv_world(self):
         self.gguf_writer.add_token_list(tokens)
         self.gguf_writer.add_token_types(toktypes)
         special_vocab = gguf.SpecialVocab(self.dir_model, load_merges=False)
-        special_vocab.chat_template = "rwkv-world"
+        if special_vocab.chat_template is None:
+            template_path = Path(__file__).parent / "models" / "templates" / "llama-cpp-rwkv-world.jinja"
+            if template_path.is_file():
+                with open(template_path, "r", encoding="utf-8") as f:
+                    template = f.read()
+            else:
+                template = "rwkv-world"
+            special_vocab.chat_template = template
         # hack: Add '\n\n' as the EOT token to make it chat normally
         special_vocab._set_special_token("eot", 261)
         # hack: Override these as they have already been set (incorrectly)

models/templates/llama-cpp-rwkv-world.jinja

@@ -0,0 +1,34 @@
+{%- if not add_generation_prompt is defined -%}
+    {%- set add_generation_prompt = true -%}
+{%- endif -%}
+{%- set ns = namespace(system_prompt='') -%}
+{%- for message in messages -%}
+    {%- if message['role'] == 'system' -%}
+        {%- set ns.system_prompt = message['content'] -%}
+    {%- endif -%}
+{%- endfor -%}
+{{bos_token}}
+{%- if ns.system_prompt != '' -%}
+{{- 'System: ' + ns.system_prompt + '\n\n' -}}
+{%- endif -%}
+{%- for message in messages -%}
+    {%- if message['role'] == 'user' -%}
+        {{- 'User: ' + message['content']|trim + '\n\n' -}}
+    {%- endif -%}
+    {%- if message['role'] == 'assistant' and message['content'] is  not none -%}
+        {%- set content = message['content'] -%}
+        {%- if '</think>' in content -%}
+            {%- set content = content.split('</think>')[-1] -%}
+        {%- endif -%}
+        {{- 'Assistant: ' + content|trim + '\n\n' -}}
+    {%- endif -%}
+{%- endfor -%}
+{%- if add_generation_prompt -%}
+    {{- 'Assistant:' -}}
+    {%- if enable_thinking is defined and enable_thinking is false %}
+        {{- ' <think>\n</think>' }}
+    {%- endif %}
+    {%- if enable_thinking is defined and enable_thinking is true %}
+        {{- ' <think>' }}
+    {%- endif %}
+{%- endif -%}

src/llama-chat.cpp

@@ -170,7 +170,7 @@ llm_chat_template llm_chat_detect_template(const std::string & tmpl) {
         // ref: https://huggingface.co/LGAI-EXAONE/EXAONE-3.0-7.8B-Instruct/discussions/8#66bae61b1893d14ee8ed85bb
         // EXAONE-3.0-7.8B-Instruct
         return LLM_CHAT_TEMPLATE_EXAONE_3;
-    } else if (tmpl_contains("rwkv-world")) {
+    } else if (tmpl_contains("rwkv-world") || tmpl_contains("{{- 'User: ' + message['content']|trim + '\\n\\n' -}}")) {
         return LLM_CHAT_TEMPLATE_RWKV_WORLD;
     } else if (tmpl_contains("<|start_of_role|>")) {
         return LLM_CHAT_TEMPLATE_GRANITE;