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Add the Command R chat format #1382

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Add the Command R chat format #1382

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19 changes: 18 additions & 1 deletion llama_cpp/llama_chat_format.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1323,7 +1323,24 @@ def format_gemma(
_prompt = _format_no_colon_single(system_message="", messages=_messages, sep=_sep)
return ChatFormatterResponse(prompt=_prompt, stop=_sep)

# Chat format for Cohere's Command R models (close to chatml but with different tokens).
# See https://docs.cohere.com/docs/prompting-command-r
@register_chat_format("command-r")
def format_commandr(
messages: List[llama_types.ChatCompletionRequestMessage],
**kwargs: Any,
) -> ChatFormatterResponse:
system_template = "<|START_OF_TURN_TOKEN|><|SYSTEM_TOKEN|>{system_message}"
system_message = _get_system_message(messages)
system_message = system_template.format(system_message=system_message)
_roles = dict(user="<|START_OF_TURN_TOKEN|><|USER_TOKEN|>", assistant="<|START_OF_TURN_TOKEN|><|CHATBOT_TOKEN|>")
_sep = "<|END_OF_TURN_TOKEN|>"
_messages = _map_roles(messages, _roles)
_messages.append((_roles["assistant"], None))
_prompt = _format_chatml(system_message, _messages, _sep)
return ChatFormatterResponse(prompt=_prompt, stop=_sep)


# Tricky chat formats that require custom chat handlers


Expand Down Expand Up @@ -2755,4 +2772,4 @@ def chatml_function_calling(
},
}

raise ValueError("Automatic streaming tool choice is not supported")
raise ValueError("Automatic streaming tool choice is not supported")