formatter.py

class LazyMessagesFormatterType:
    def __getattr__(self, name):
        return LazyLlamaAgentValue("MessagesFormatterType", name)


class LazyLlamaAgentValue:
    def __init__(self, source, name):
        self.source = source
        self.name = name

    def resolve(self):
        if self.source == "MessagesFormatterType":
            from llama_cpp_agent import MessagesFormatterType
            return getattr(MessagesFormatterType, self.name)
        if self.source == "custom_formatter":
            return build_mistral_formatter(self.name)
        raise ValueError(f"Unknown lazy llama agent value source: {self.source}")

    def __repr__(self):
        return f"<LazyLlamaAgentValue {self.source}.{self.name}>"

    def __eq__(self, other):
        return (
            isinstance(other, LazyLlamaAgentValue)
            and self.source == other.source
            and self.name == other.name
        )

    def __hash__(self):
        return hash((self.source, self.name))


MessagesFormatterType = LazyMessagesFormatterType()


def build_mistral_formatter(name):
    from llama_cpp_agent.messages_formatter import MessagesFormatter, PromptMarkers, Roles

    if name == "mistral_v1":
        markers = {
            Roles.system: PromptMarkers(""" [INST]""", """ [/INST]"""),
            Roles.user: PromptMarkers(""" [INST]""", """ [/INST]"""),
            Roles.assistant: PromptMarkers(""" """, """</s>"""),
            Roles.tool: PromptMarkers("", ""),
        }
        return MessagesFormatter("", markers, False, ["</s>"])

    if name == "mistral_v2":
        markers = {
            Roles.system: PromptMarkers("""[INST] """, """[/INST]"""),
            Roles.user: PromptMarkers("""[INST] """, """[/INST]"""),
            Roles.assistant: PromptMarkers(""" """, """</s>"""),
            Roles.tool: PromptMarkers("", ""),
        }
        return MessagesFormatter("", markers, False, ["</s>"])

    if name == "mistral_v3_tekken":
        markers = {
            Roles.system: PromptMarkers("""[INST]""", """[/INST]"""),
            Roles.user: PromptMarkers("""[INST]""", """[/INST]"""),
            Roles.assistant: PromptMarkers("""""", """</s>"""),
            Roles.tool: PromptMarkers("", ""),
        }
        return MessagesFormatter("", markers, False, ["</s>"])

    raise ValueError(f"Unknown Mistral formatter: {name}")


mistral_v1_formatter = LazyLlamaAgentValue("custom_formatter", "mistral_v1")
mistral_v2_formatter = LazyLlamaAgentValue("custom_formatter", "mistral_v2")
mistral_v3_tekken_formatter = LazyLlamaAgentValue("custom_formatter", "mistral_v3_tekken")