utils.py

# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project

from copy import deepcopy
from typing import Any

from openai.types.chat import ChatCompletionMessageParam, ChatCompletionToolParam
from typing_extensions import TypedDict

from tests.utils import VLLM_PATH


class ServerConfig(TypedDict, total=False):
    model: str
    arguments: list[str]
    system_prompt: str | None
    supports_parallel: bool | None
    supports_rocm: bool | None
    extended: bool | None  # tests do not run in CI automatically


def patch_system_prompt(
    messages: list[dict[str, Any]], system_prompt: str
) -> list[dict[str, Any]]:
    new_messages = deepcopy(messages)
    if new_messages[0]["role"] == "system":
        new_messages[0]["content"] = system_prompt
    else:
        new_messages.insert(0, {"role": "system", "content": system_prompt})
    return new_messages


def ensure_system_prompt(
    messages: list[dict[str, Any]], config: ServerConfig
) -> list[dict[str, Any]]:
    prompt = config.get("system_prompt")
    if prompt:
        return patch_system_prompt(messages, prompt)
    else:
        return messages


# universal args for all models go here. also good if you need to test locally
# and change type or KV cache quantization or something.
SEED = 42

ARGS: list[str] = [
    "--enable-auto-tool-choice",
    "--max-model-len",
    "1024",
    "--max-num-seqs",
    "256",
]

CONFIGS: dict[str, ServerConfig] = {
    "hermes": {
        "model": "NousResearch/Hermes-3-Llama-3.1-8B",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "hermes",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_hermes.jinja"),
        ],
        "system_prompt": "You are a helpful assistant with access to tools. If a tool"
        " that you have would be helpful to answer a user query, "
        "call the tool. Otherwise, answer the user's query directly "
        "without calling a tool. DO NOT CALL A TOOL THAT IS IRRELEVANT "
        "to the user's question - just respond to it normally.",
    },
    "llama": {
        "model": "meta-llama/Meta-Llama-3.1-8B-Instruct",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "llama3_json",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_llama3.1_json.jinja"),
        ],
        "supports_parallel": False,
    },
    "llama3.2": {
        "model": "meta-llama/Llama-3.2-3B-Instruct",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "llama3_json",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_llama3.2_json.jinja"),
        ],
        "supports_parallel": False,
    },
    "llama4": {
        "model": "meta-llama/Llama-4-Scout-17B-16E-Instruct",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "llama4_pythonic",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_llama4_pythonic.jinja"),
            "-tp",
            "4",
        ],
        "supports_parallel": False,
        "extended": True,
    },
    "llama4_json": {
        "model": "meta-llama/Llama-4-Scout-17B-16E-Instruct",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "-tp",
            "4",
            "--distributed-executor-backend",
            "mp",
            "--tool-call-parser",
            "llama4_json",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_llama4_json.jinja"),
        ],
        "supports_parallel": True,
        "extended": True,
    },
    "mistral-7b": {
        "model": "mistralai/Mistral-7B-Instruct-v0.3",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tokenizer_mode",
            "hf",
            "--load_format",
            "hf",
            "--config_format",
            "hf",
            "--tool-call-parser",
            "mistral",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_mistral.jinja"),
            '--ignore-patterns="consolidated.safetensors"',
        ],
        "system_prompt": "You are a helpful assistant with access to tools. If a tool"
        " that you have would be helpful to answer a user query, "
        "call the tool. Otherwise, answer the user's query directly "
        "without calling a tool. DO NOT CALL A TOOL THAT IS IRRELEVANT "
        "to the user's question - just respond to it normally.",
        "supports_parallel": True,
    },
    "mistral-small-3.2": {
        "model": "mistralai/Mistral-Small-3.2-24B-Instruct-2506",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "mistral",
            "--tokenizer-mode",
            "mistral",
            "--config-format",
            "mistral",
            "--load-format",
            "mistral",
            "--tensor-parallel-size",
            "4",
            '--ignore-patterns="consolidated.safetensors"',
        ],
        "system_prompt": "You are a helpful assistant with access to tools. If a tool"
        " that you have would be helpful to answer a user query, "
        "call the tool. Otherwise, answer the user's query directly "
        "without calling a tool. DO NOT CALL A TOOL THAT IS IRRELEVANT "
        "to the user's question - just respond to it normally.",
        "supports_parallel": True,
        "extended": True,
    },
    # FIXME: This test currently fails, need to debug why.
    # "granite20b": {
    #     "model": "mbayser/granite-20b-functioncalling-FP8-KV",
    #     "arguments": [
    #         "--tool-call-parser",
    #         "granite-20b-fc",
    #         "--chat-template",
    #         str(VLLM_PATH / "examples/tool_chat_template_granite_20b_fc.jinja"),
    #         "--max_num_seqs",
    #         "1",
    #         "--enforce-eager",
    #         "--cpu-offload-gb",
    #         "20",
    #     ],
    #     "supports_parallel": False,
    #     "supports_rocm": False,
    # },
    "granite-3.0-8b": {
        "model": "ibm-granite/granite-3.0-8b-instruct",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "granite",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_granite.jinja"),
        ],
    },
    "granite-3.1-8b": {
        "model": "ibm-granite/granite-3.1-8b-instruct",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "granite",
        ],
        "supports_parallel": True,
    },
    "internlm": {
        "model": "internlm/internlm2_5-7b-chat",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "internlm",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_internlm2_tool.jinja"),
            "--trust_remote_code",
        ],
        "supports_parallel": False,
    },
    "toolACE": {
        "model": "Team-ACE/ToolACE-8B",
        "arguments": [
            "--enforce-eager",
            "--no-enable-prefix-caching",
            "--tool-call-parser",
            "pythonic",
            "--chat-template",
            str(VLLM_PATH / "examples/tool_chat_template_toolace.jinja"),
        ],
        "supports_parallel": True,
    },
}

WEATHER_TOOL: ChatCompletionToolParam = {
    "type": "function",
    "function": {
        "name": "get_current_weather",
        "description": "Get the current weather in a given location",
        "parameters": {
            "type": "object",
            "properties": {
                "city": {
                    "type": "string",
                    "description": "The city to find the weather for, "
                    "e.g. 'San Francisco'",
                },
                "state": {
                    "type": "string",
                    "description": "must the two-letter abbreviation for the state "
                    "that the city is in, e.g. 'CA' which would "
                    "mean 'California'",
                },
                "unit": {
                    "type": "string",
                    "description": "The unit to fetch the temperature in",
                    "enum": ["celsius", "fahrenheit"],
                },
            },
        },
    },
}

SEARCH_TOOL: ChatCompletionToolParam = {
    "type": "function",
    "function": {
        "name": "web_search",
        "description": "Search the internet and get a summary of the top "
        "10 webpages. Should only be used if you don't know "
        "the answer to a user query, and the results are likely"
        "to be able to be found with a web search",
        "parameters": {
            "type": "object",
            "properties": {
                "search_term": {
                    "type": "string",
                    "description": "The term to use in the search. This should"
                    "ideally be keywords to search for, not a"
                    "natural-language question",
                }
            },
            "required": ["search_term"],
        },
    },
}

MESSAGES_WITHOUT_TOOLS: list[ChatCompletionMessageParam] = [
    {"role": "user", "content": "Hi! How are you?"},
    {"role": "assistant", "content": "I'm doing great! How can I assist you?"},
    {"role": "user", "content": "Can you tell me a joke please?"},
]

MESSAGES_ASKING_FOR_TOOLS: list[ChatCompletionMessageParam] = [
    {"role": "user", "content": "What is the weather in Dallas, Texas in Fahrenheit?"}
]

MESSAGES_WITH_TOOL_RESPONSE: list[ChatCompletionMessageParam] = [
    {"role": "user", "content": "What is the weather in Dallas, Texas in Fahrenheit?"},
    {
        "role": "assistant",
        "tool_calls": [
            {
                "id": "chatcmpl-tool-03e6481b146e408e9523d9c956696295",
                "type": "function",
                "function": {
                    "name": WEATHER_TOOL["function"]["name"],
                    "arguments": '{"city": "Dallas", "state": "TX", '
                    '"unit": "fahrenheit"}',
                },
            }
        ],
    },
    {
        "role": "tool",
        "tool_call_id": "chatcmpl-tool-03e6481b146e408e9523d9c956696295",
        "content": "The weather in Dallas is 98 degrees fahrenheit, with partly"
        "cloudy skies and a low chance of rain.",
    },
]

MESSAGES_ASKING_FOR_PARALLEL_TOOLS: list[ChatCompletionMessageParam] = [
    {
        "role": "user",
        "content": "What is the weather in Dallas, Texas and Orlando, Florida in "
        "Fahrenheit?",
    }
]

MESSAGES_WITH_PARALLEL_TOOL_RESPONSE: list[ChatCompletionMessageParam] = [
    {
        "role": "user",
        "content": "What is the weather in Dallas, Texas and Orlando, Florida in "
        "Fahrenheit?",
    },
    {
        "role": "assistant",
        "tool_calls": [
            {
                "id": "chatcmpl-tool-03e6481b146e408e9523d9c956696295",
                "type": "function",
                "function": {
                    "name": WEATHER_TOOL["function"]["name"],
                    "arguments": '{"city": "Dallas", "state": "TX", '
                    '"unit": "fahrenheit"}',
                },
            },
            {
                "id": "chatcmpl-tool-d027061e1bd21cda48bee7da829c1f5b",
                "type": "function",
                "function": {
                    "name": WEATHER_TOOL["function"]["name"],
                    "arguments": '{"city": "Orlando", "state": "Fl", '
                    '"unit": "fahrenheit"}',
                },
            },
        ],
    },
    {
        "role": "tool",
        "tool_call_id": "chatcmpl-tool-03e6481b146e408e9523d9c956696295",
        "content": "The weather in Dallas TX is 98 degrees fahrenheit with mostly "
        "cloudy skies and a chance of rain in the evening.",
    },
    {
        "role": "tool",
        "tool_call_id": "chatcmpl-tool-d027061e1bd21cda48bee7da829c1f5b",
        "content": "The weather in Orlando FL is 78 degrees fahrenheit with clear"
        "skies.",
    },
]