| # Agent支持 |
|
|
| ## 数据集格式 |
|
|
| ms-swift 使用 agent-template 实现了Agent数据格式与模型的解耦:基于统一的数据集格式,可以灵活切换不同模型进行训练,无需修改数据。 |
|
|
| 纯文本Agent和多模态Agent的示例数据样本如下: |
| ```jsonl |
| {"tools": "[{\"type\": \"function\", \"function\": {\"name\": \"realtime_aqi\", \"description\": \"天气预报。获取实时空气质量。当前空气质量,PM2.5,PM10信息\", \"parameters\": {\"type\": \"object\", \"properties\": {\"city\": {\"type\": \"string\", \"description\": \"城市名,例如:上海\"}}, \"required\": [\"city\"]}}}]", "messages": [{"role": "user", "content": "北京和上海今天的天气情况"}, {"role": "tool_call", "content": "{\"name\": \"realtime_aqi\", \"arguments\": {\"city\": \"北京\"}}"}, {"role": "tool_call", "content": "{\"name\": \"realtime_aqi\", \"arguments\": {\"city\": \"上海\"}}"}, {"role": "tool_response", "content": "{\"city\": \"北京\", \"aqi\": \"10\", \"unit\": \"celsius\"}"}, {"role": "tool_response", "content": "{\"city\": \"上海\", \"aqi\": \"72\", \"unit\": \"fahrenheit\"}"}, {"role": "assistant", "content": "根据天气预报工具,北京今天的空气质量指数为10,属于良好水平;上海今天的空气质量指数为72,属于轻度污染水平。"}]} |
| {"tools": "[{\"type\": \"function\", \"function\": {\"name\": \"click\", \"description\": \"点击屏幕中的某个位置\", \"parameters\": {\"type\": \"object\", \"properties\": {\"x\": {\"type\": \"integer\", \"description\": \"横坐标,表示屏幕上的水平位置\"}, \"y\": {\"type\": \"integer\", \"description\": \"纵坐标,表示屏幕上的垂直位置\"}}, \"required\": [\"x\", \"y\"]}}}]", "messages": [{"role": "user", "content": "<image>现在几点了?"}, {"role": "assistant", "content": "<think>\n我可以通过打开日历App来获取当前时间。\n</think>\n"}, {"role": "tool_call", "content": "{\"name\": \"click\", \"arguments\": {\"x\": 105, \"y\": 132}}"}, {"role": "tool_response", "content": "{\"images\": \"<image>\", \"status\": \"success\"}"}, {"role": "assistant", "content": "成功打开日历App,现在的时间为中午11点"}], "images": ["desktop.png", "calendar.png"]} |
| ``` |
| - agent_template为"react_en", "hermes"等情况下,该格式适配所有模型Agent训练,可以轻松在不同模型间切换。 |
| - 其中tools是一个包含tool列表的json字符串,messages中role为'tool_call'和'tool_response/tool'的content部分都需要是json字符串。 |
| - tools字段将在训练/推理时和`{"role": "system", ...}"`部分组合,根据agent_template组成完整的system部分。 |
| - `{"role": "tool_call", ...}`部分将根据agent_template自动转成对应格式的`{"role": "assistant", ...}`,多条连续的`{"role": "assistant", ...}`将拼接在一起组成完整的assistant_content。 |
| - `{"role": "tool_response", ...}`也可以写成`{"role": "tool", ...}`,这两种写法是等价的。该部分也将根据`agent_template`自动转换格式。该部分在训练时将不进行损失的计算,角色类似于`{"role": "user", ...}`。 |
| - 该格式支持并行调用工具,例子参考第一条数据样本。多模态Agent数据样本中`<image>`标签数量应与"images"长度相同,其标签位置代表图像特征的插入位置。当然也支持其他模态,例如audios, videos。 |
| - 注意:您也可以手动将数据处理为role为system/user/assistant的messages格式。agent_template的作用是将其中的tools字段以及role为tool_call和tool_response的messages部分,自动映射为标准的role为system/user/assistant的messages格式。 |
|
|
| 以下为上述两条数据样本由qwen2_5和qwen2_5_vl的template进行encode后的input_ids和labels,选择的agent_template为**hermes**: |
| |
| 样本一(并行工具调用): |
| ```text |
| [INPUT_IDS] <|im_start|>system |
| You are Qwen, created by Alibaba Cloud. You are a helpful assistant. |
| |
| # Tools |
| |
| You may call one or more functions to assist with the user query. |
| |
| You are provided with function signatures within <tools></tools> XML tags: |
| <tools> |
| {"type": "function", "function": {"name": "realtime_aqi", "description": "天气预报。获取实时空气质量。当前空气质量,PM2.5,PM10信息", "parameters": {"type": "object", "properties": {"city": {"type": "string", "description": "城市名,例如:上海"}}, "required": ["city"]}}} |
| </tools> |
|
|
| For each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags: |
| <tool_call> |
| {"name": <function-name>, "arguments": <args-json-object>} |
| </tool_call><|im_end|> |
| <|im_start|>user |
| 北京和上海今天的天气情况<|im_end|> |
| <|im_start|>assistant |
| <tool_call> |
| {"name": "realtime_aqi", "arguments": {"city": "北京"}} |
| </tool_call> |
| <tool_call> |
| {"name": "realtime_aqi", "arguments": {"city": "上海"}} |
| </tool_call><|im_end|> |
| <|im_start|>user |
| <tool_response> |
| {"city": "北京", "aqi": "10", "unit": "celsius"} |
| </tool_response> |
| <tool_response> |
| {"city": "上海", "aqi": "72", "unit": "fahrenheit"} |
| </tool_response><|im_end|> |
| <|im_start|>assistant |
| 根据天气预报工具,北京今天的空气质量指数为10,属于良好水平;上海今天的空气质量指数为72,属于轻度污染水平。<|im_end|> |
| |
| [LABELS] [-100 * 195]<tool_call> |
| {"name": "realtime_aqi", "arguments": {"city": "北京"}} |
| </tool_call> |
| <tool_call> |
| {"name": "realtime_aqi", "arguments": {"city": "上海"}} |
| </tool_call><|im_end|>[-100 * 67]根据天气预报工具,北京今天的空气质量指数为10,属于良好水平;上海今天的空气质量指数为72,属于轻度污染水平。<|im_end|> |
| ``` |
| |
| 样本二(多模态,混合assistant和tool_call): |
| ```text |
| [INPUT_IDS] <|im_start|>system |
| You are a helpful assistant. |
| |
| # Tools |
| |
| You may call one or more functions to assist with the user query. |
| |
| You are provided with function signatures within <tools></tools> XML tags: |
| <tools> |
| {"type": "function", "function": {"name": "click", "description": "点击屏幕中的某个位置", "parameters": {"type": "object", "properties": {"x": {"type": "integer", "description": "横坐标,表示屏幕上的水平位置"}, "y": {"type": "integer", "description": "纵坐标,表示屏幕上的垂直位置"}}, "required": ["x", "y"]}}} |
| </tools> |
| |
| For each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags: |
| <tool_call> |
| {"name": <function-name>, "arguments": <args-json-object>} |
| </tool_call><|im_end|> |
| <|im_start|>user |
| <|vision_start|>[151655 * 729]<|vision_end|>现在几点了?<|im_end|> |
| <|im_start|>assistant |
| <think> |
| 我可以通过打开日历App来获取当前时间。 |
| </think> |
| <tool_call> |
| {"name": "click", "arguments": {"x": 105, "y": 132}} |
| </tool_call><|im_end|> |
| <|im_start|>user |
| <tool_response> |
| {"images": "<|vision_start|>[151655 * 729]<|vision_end|>", "status": "success"} |
| </tool_response><|im_end|> |
| <|im_start|>assistant |
| 成功打开日历App,现在的时间为中午11点<|im_end|> |
| |
| [LABELS] [-100 * 924]<think> |
| 我可以通过打开日历App来获取当前时间。 |
| </think> |
| <tool_call> |
| {"name": "click", "arguments": {"x": 105, "y": 132}} |
| </tool_call><|im_end|>[-100 * 759]成功打开日历App,现在的时间为中午11点<|im_end|> |
| ``` |
|
|
| **react_en**是常用的agent template格式之一,以下为样本一由qwen2_5使用`agent_template='react_en'`进行encode后的input_ids和labels: |
| |
| ```text |
| [INPUT_IDS] <|im_start|>system |
| Answer the following questions as best you can. You have access to the following tools: |
| |
| realtime_aqi: Call this tool to interact with the realtime_aqi API. What is the realtime_aqi API useful for? 天气预报。获取实时空气质量。当前空气质量,PM2.5,PM10信息 Parameters: {"type": "object", "properties": {"city": {"type": "string", "description": "城市名,例如:上海"}}, "required": ["city"]} Format the arguments as a JSON object. |
| |
| Use the following format: |
| |
| Question: the input question you must answer |
| Thought: you should always think about what to do |
| Action: the action to take, should be one of [realtime_aqi] |
| Action Input: the input to the action |
| Observation: the result of the action |
| ... (this Thought/Action/Action Input/Observation can be repeated zero or more times) |
| Thought: I now know the final answer |
| Final Answer: the final answer to the original input question |
| |
| Begin! |
| <|im_end|> |
| <|im_start|>user |
| 北京和上海今天的天气情况<|im_end|> |
| <|im_start|>assistant |
| Action: realtime_aqi |
| Action Input: {'city': '北京'} |
| Action: realtime_aqi |
| Action Input: {'city': '上海'} |
| Observation:{"city": "北京", "aqi": "10", "unit": "celsius"} |
| Observation:{"city": "上海", "aqi": "72", "unit": "fahrenheit"} |
| 根据天气预报工具,北京今天的空气质量指数为10,属于良好水平;上海今天的空气质量指数为72,属于轻度污染水平。<|im_end|> |
| |
| [LABELS] [-100 * 233]Action: realtime_aqi |
| Action Input: {'city': '北京'} |
| Action: realtime_aqi |
| Action Input: {'city': '上海'} |
| Observation:[-100 * 45]根据天气预报工具,北京今天的空气质量指数为10,属于良好水平;上海今天的空气质量指数为72,属于轻度污染水平。<|im_end|> |
| ``` |
| |
| 更多模型和agent_template的尝试可以使用以下代码,更多的agent template可选值参考[这里](https://github.com/modelscope/ms-swift/blob/main/swift/agent_template/__init__.py)。 |
| ```python |
| from swift import get_processor, get_template |
| |
| tokenizer = get_processor('Qwen/Qwen3.5-2B') |
| template = get_template(tokenizer) # 使用默认agent模板 |
| # template = get_template(tokenizer, agent_template='qwen3_5') |
| print(f'agent_template: {template._agent_template}') |
| data = {...} |
| template.set_mode('train') |
| encoded = template.encode(data) |
| print(f'[INPUT_IDS] {template.safe_decode(encoded["input_ids"])}\n') |
| print(f'[LABELS] {template.safe_decode(encoded["labels"])}') |
| ``` |
| |
| |
| ## tools格式 |
| tools字段提供了模型可以调用的API信息。你需要提供tools的名字,描述和参数,示例如下: |
| |
| ```python |
| tools = [{ |
| 'type': 'function', |
| 'function': { |
| 'name': 'get_current_weather', |
| 'description': 'Get the current weather in a given location', |
| 'parameters': { |
| 'type': 'object', |
| 'properties': { |
| 'location': { |
| 'type': 'string', |
| 'description': 'The city and state, e.g. San Francisco, CA' |
| }, |
| 'unit': { |
| 'type': 'string', |
| 'enum': ['celsius', 'fahrenheit'] |
| } |
| }, |
| 'required': ['location'] |
| } |
| } |
| }] |
| ``` |
| |
| ## loss_scale的使用 |
| |
| loss_scale参数可用于调节模型输出部分在训练过程中的损失权重。目前支持两种配置方式:字符串精确匹配和正则表达式匹配。 |
| |
| 1. 字符串匹配示例:ReACT 格式 |
| |
| 以 ReACT 格式为例,可通过 `--loss_scale react` 启用相应的 loss_scale 配置(配置文件详见 [react.json](https://github.com/modelscope/ms-swift/blob/main/swift/loss_scale/config/react.json))。该方式基于字符串精确匹配,配置中的字典映射需提供一个包含两个元素的列表,分别表示:当前匹配字符串本身的损失权重, |
| 从该字符串之后到下一个指定字符串之前的内容的损失权重。该设置的具体效果如下: |
| - 'Action:' 和 'Action Input:' 字段自身及其后续内容的损失权重均为 2; |
| - 'Thought:' 和 'Final Answer:' 字段自身及其后续内容的损失权重均为 1; |
| - 'Observation:' 字段自身的权重为 2,但其后跟随的工具调用结果部分的损失权重为 0。 |
| |
| 2. 正则匹配示例:忽略空思维块 |
| |
| 在训练推理模型时,我们可能需要忽略数据集中存在的形如 `'<think>\n\n</think>\n\n'`的空思维标记损失计算。此时可使用 `--loss_scale ignore_empty_think`(配置文件详见 [ignore_empty_think.json](https://github.com/modelscope/ms-swift/blob/main/swift/loss_scale/config/ignore_empty_think.json))。该配置采用正则表达式匹配方式,字典映射的列表只需指定一个值,表示匹配内容的损失权重。该设置的具体效果如下: |
| |
| - 所有与正则表达式`<think>\\s*</think>\\s*`匹配的字符串,loss_scale为0,即不计算损失。 |
| |
| 使用代码测试loss_scale: |
| ```python |
| from swift import get_processor, get_template |
| |
| data = {"messages": [ |
| {"role": "user", "content": "aaaaa"}, |
| {"role": "assistant", "content": "<think>\n\n</think>\n\nabc<think>\n\n</think>\n\n123"}, |
| ]} |
| |
| template = get_template(get_processor('Qwen/Qwen3-8B'), loss_scale='ignore_empty_think') |
| template.set_mode('train') |
| inputs = template.encode(data) |
| |
| print(template.safe_decode(inputs['labels'])) |
| # '[-100 * 14]abc<think>\n\n</think>\n\n123<|im_end|>\n' |
| ``` |
| |
| 更多的loss_scale插件设计,请参考[架构](../Customization/Architecture.md#loss-scale)文档. |
| |
| ## 训练 |
| - 训练Base模型的Agent能力,通过修改`--model`切换不同模型,参考[这里](https://github.com/modelscope/ms-swift/blob/main/examples/train/agent/qwen2_5.sh)。 |
| - 训练GLM4的agent_template为hermes,参考[这里](https://github.com/modelscope/ms-swift/blob/main/examples/train/agent/glm4.sh)。 |
| - 使用`--loss_scale`对模型输出部分的损失权重进行调整,参加[这里](https://github.com/modelscope/ms-swift/tree/main/examples/train/agent/loss_scale)。 |
| |
| ## 推理 |
| |
| - 🚀原始模型或者全参数训练后模型的推理,参考[这里](https://github.com/modelscope/ms-swift/blob/main/examples/infer/demo_agent.py)。 |
| - LoRA训练后推理,参考[这里](https://github.com/modelscope/ms-swift/blob/main/examples/train/agent/loss_scale/infer_lora.py)。 |
| |
| ## 部署 |
| |
| 服务端和客户端代码,参考[这里](https://github.com/modelscope/ms-swift/blob/main/examples/deploy/agent)。 |
| |