commit bc5308b1855f965ce35858984152aac92f61cd06 Author: ModelHub XC Date: Wed May 6 21:30:39 2026 +0800 初始化项目，由ModelHub XC社区提供模型 Model: Salesforce/xLAM-2-3b-fc-r Source: Original Platform diff --git a/.gitattributes b/.gitattributes new file mode 100644 index 0000000..d2fc868 --- /dev/null +++ b/.gitattributes @@ -0,0 +1,51 @@ +*.7z filter=lfs diff=lfs merge=lfs -text +*.arrow filter=lfs diff=lfs merge=lfs -text +*.bin filter=lfs diff=lfs merge=lfs -text +*.bin.* filter=lfs diff=lfs merge=lfs -text +*.bz2 filter=lfs diff=lfs merge=lfs -text +*.ftz filter=lfs diff=lfs merge=lfs -text +*.gz filter=lfs diff=lfs merge=lfs -text +*.h5 filter=lfs diff=lfs merge=lfs -text +*.joblib filter=lfs diff=lfs merge=lfs -text +*.lfs.* filter=lfs diff=lfs merge=lfs -text +*.model filter=lfs diff=lfs merge=lfs -text +*.msgpack filter=lfs diff=lfs merge=lfs -text +*.onnx filter=lfs diff=lfs merge=lfs -text +*.ot filter=lfs diff=lfs merge=lfs -text +*.parquet filter=lfs diff=lfs merge=lfs -text +*.pb filter=lfs diff=lfs merge=lfs -text +*.pt filter=lfs diff=lfs merge=lfs -text +*.pth filter=lfs diff=lfs merge=lfs -text +*.rar filter=lfs diff=lfs merge=lfs -text +saved_model/**/* filter=lfs diff=lfs merge=lfs -text +*.tar.* filter=lfs diff=lfs merge=lfs -text +*.tflite filter=lfs diff=lfs merge=lfs -text +*.tgz filter=lfs diff=lfs merge=lfs -text +*.xz filter=lfs diff=lfs merge=lfs -text +*.zip filter=lfs diff=lfs merge=lfs -text +*.zstandard filter=lfs diff=lfs merge=lfs -text +*.tfevents* filter=lfs diff=lfs merge=lfs -text +*.db* filter=lfs diff=lfs merge=lfs -text +*.ark* filter=lfs diff=lfs merge=lfs -text +**/*ckpt*data* filter=lfs diff=lfs merge=lfs -text +**/*ckpt*.meta filter=lfs diff=lfs merge=lfs -text +**/*ckpt*.index filter=lfs diff=lfs merge=lfs -text +*.safetensors filter=lfs diff=lfs merge=lfs -text +*.ckpt filter=lfs diff=lfs merge=lfs -text +*.gguf* filter=lfs diff=lfs merge=lfs -text +*.ggml filter=lfs diff=lfs merge=lfs -text +*.llamafile* filter=lfs diff=lfs merge=lfs -text +*.pt2 filter=lfs diff=lfs merge=lfs -text +*.mlmodel filter=lfs diff=lfs merge=lfs -text +*.npy filter=lfs diff=lfs merge=lfs -text +*.npz filter=lfs diff=lfs merge=lfs -text +*.pickle filter=lfs diff=lfs merge=lfs -text +*.pkl filter=lfs diff=lfs merge=lfs -text +*.tar filter=lfs diff=lfs merge=lfs -text +*.wasm filter=lfs diff=lfs merge=lfs -text +*.zst filter=lfs diff=lfs merge=lfs -text +*tfevents* filter=lfs diff=lfs merge=lfs -text + +merges.txt filter=lfs diff=lfs merge=lfs -text +tokenizer.json filter=lfs diff=lfs merge=lfs -text +vocab.json filter=lfs diff=lfs merge=lfs -text \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..1198d10 --- /dev/null +++ b/README.md @@ -0,0 +1,308 @@ +--- +license: cc-by-nc-4.0 +datasets: +- Salesforce/APIGen-MT-5k +- Salesforce/xlam-function-calling-60k +language: +- en +pipeline_tag: text-generation +tags: +- function-calling +- LLM Agent +- tool-use +- llama +- qwen +- pytorch +- LLaMA-factory +library_name: transformers +--- + +

+xLAM +

+ + +

+ [Paper] | + [Homepage] | + [Dataset] | + [Github] +

+
+ +# Welcome to the xLAM-2 Model Family! + +[Large Action Models (LAMs)](https://blog.salesforceairesearch.com/large-action-models/) are advanced language models designed to enhance decision-making by translating user intentions into executable actions. As the **brains of AI agents**, LAMs autonomously plan and execute tasks to achieve specific goals, making them invaluable for automating workflows across diverse domains. +**This model release is for research purposes only.** + +The new **xLAM-2** series, built on our most advanced data synthesis, processing, and training pipelines, marks a significant leap in **multi-turn conversation** and **tool usage**. Trained using our novel APIGen-MT framework, which generates high-quality training data through simulated agent-human interactions. Our models achieve state-of-the-art performance on [**BFCL**](https://gorilla.cs.berkeley.edu/leaderboard.html) and **τ-bench** benchmarks, outperforming frontier models like GPT-4o and Claude 3.5. Notably, even our smaller models demonstrate superior capabilities in multi-turn scenarios while maintaining exceptional consistency across trials. + +We've also refined the **chat template** and **vLLM integration**, making it easier to build advanced AI agents. Compared to previous xLAM models, xLAM-2 offers superior performance and seamless deployment across applications. + +

+Model Performance Overview +
+Comparative performance of larger xLAM-2-fc-r models (8B-70B, trained with APIGen-MT data) against state-of-the-art baselines on function-calling (BFCL v3, as of date 04/02/2025) and agentic (τ-bench) capabilities. +

+ + +## Table of Contents +- [Usage](#usage) + - [Basic Usage with Huggingface Chat Template](#basic-usage-with-huggingface-chat-template) + - [Using vLLM for Inference](#using-vllm-for-inference) + - [Setup and Serving](#setup-and-serving) + - [Testing with OpenAI API](#testing-with-openai-api) +- [Benchmark Results](#benchmark-results) +- [Citation](#citation) + +--- + +## Model Series + +[xLAM](https://huggingface.co/collections/Salesforce/xlam-models-65f00e2a0a63bbcd1c2dade4) series are significant better at many things including general tasks and function calling. +For the same number of parameters, the model have been fine-tuned across a wide range of agent tasks and scenarios, all while preserving the capabilities of the original model. + + +| Model | # Total Params | Context Length | Category | Download Model | Download GGUF files | +|------------------------|----------------|------------|-------|----------------|----------| +| Llama-xLAM-2-70b-fc-r | 70B | 128k | Multi-turn Conversation, Function-calling | [🤗 Link](https://huggingface.co/Salesforce/Llama-xLAM-2-70b-fc-r) | NA | +| Llama-xLAM-2-8b-fc-r | 8B | 128k | Multi-turn Conversation, Function-calling | [🤗 Link](https://huggingface.co/Salesforce/Llama-xLAM-2-8b-fc-r) | [🤗 Link](https://huggingface.co/Salesforce/Llama-xLAM-2-8b-fc-r-gguf) | +| xLAM-2-32b-fc-r | 32B | 32k (max 128k)* | Multi-turn Conversation, Function-calling | [🤗 Link](https://huggingface.co/Salesforce/xLAM-2-32b-fc-r) | NA | +| xLAM-2-3b-fc-r | 3B | 32k (max 128k)* | Multi-turn Conversation, Function-calling | [🤗 Link](https://huggingface.co/Salesforce/xLAM-2-3b-fc-r) | [🤗 Link](https://huggingface.co/Salesforce/xLAM-2-3b-fc-r-gguf) | +| xLAM-2-1b-fc-r | 1B | 32k (max 128k)* | Multi-turn Conversation, Function-calling | [🤗 Link](https://huggingface.co/Salesforce/xLAM-2-1b-fc-r) | [🤗 Link](https://huggingface.co/Salesforce/xLAM-2-1b-fc-r-gguf) | + +***Note:** The default context length for Qwen-2.5-based models is 32k, but you can use techniques like YaRN (Yet Another Recursive Network) to achieve maximum 128k context length. Please refer to [here](https://huggingface.co/Qwen/Qwen2.5-32B-Instruct#processing-long-texts) for more details. + +You can also explore our previous xLAM series [here](https://huggingface.co/collections/Salesforce/xlam-models-65f00e2a0a63bbcd1c2dade4). + +The `-fc` suffix indicates that the models are fine-tuned for **function calling** tasks, while the `-r` suffix signifies a **research** release. + +✅ All models are fully compatible with vLLM and Transformers-based inference frameworks. + + +## Usage + +### Framework versions + +- Transformers 4.46.1 (or later) +- PyTorch 2.5.1+cu124 (or later) +- Datasets 3.1.0 (or later) +- Tokenizers 0.20.3 (or later) + +### Basic Usage with Huggingface Chat Template + +The new xLAM models are designed to work seamlessly with the Hugging Face Transformers library and utilize natural chat templates for an easy and intuitive conversational experience. Below are examples of how to use these models. + +```python +import torch +from transformers import AutoModelForCausalLM, AutoTokenizer + +tokenizer = AutoTokenizer.from_pretrained("Salesforce/Llama-xLAM-2-3b-fc-r") +model = AutoModelForCausalLM.from_pretrained("Salesforce/Llama-xLAM-2-3b-fc-r", torch_dtype=torch.bfloat16, device_map="auto") + +# Example conversation with a tool call +messages = [ + {"role": "user", "content": "Hi, how are you?"}, + {"role": "assistant", "content": "Thanks. I am doing well. How can I help you?"}, + {"role": "user", "content": "What's the weather like in London?"}, +] + +tools = [ + { + "name": "get_weather", + "description": "Get the current weather for a location", + "parameters": { + "type": "object", + "properties": { + "location": {"type": "string", "description": "The city and state, e.g. San Francisco, CA"}, + "unit": {"type": "string", "enum": ["celsius", "fahrenheit"], "description": "The unit of temperature to return"} + }, + "required": ["location"] + } + } +] + +print("====== prompt after applying chat template ======") +print(tokenizer.apply_chat_template(messages, tools=tools, add_generation_prompt=True, tokenize=False)) + +inputs = tokenizer.apply_chat_template(messages, tools=tools, add_generation_prompt=True, return_dict=True, return_tensors="pt") +input_ids_len = inputs["input_ids"].shape[-1] # Get the length of the input tokens +inputs = {k: v.to(model.device) for k, v in inputs.items()} +print("====== model response ======") +outputs = model.generate(**inputs, max_new_tokens=256) +generated_tokens = outputs[:, input_ids_len:] # Slice the output to get only the newly generated tokens +print(tokenizer.decode(generated_tokens[0], skip_special_tokens=True)) +``` + +### Using vLLM for Inference + +The xLAM models can also be efficiently served using vLLM for high-throughput inference. Please use `vllm>=0.6.5` since earlier versions will cause degraded performance for Qwen-based models. + +#### Setup and Serving + +1. Install vLLM with the required version: +```bash +pip install "vllm>=0.6.5" +``` + +2. Download the tool parser plugin to your local path: +```bash +wget https://huggingface.co/Salesforce/xLAM-2-1b-fc-r/raw/main/xlam_tool_call_parser.py +``` + +3. Start the OpenAI API-compatible endpoint: +```bash +vllm serve Salesforce/xLAM-2-1b-fc-r \ + --enable-auto-tool-choice \ + --tool-parser-plugin ./xlam_tool_call_parser.py \ + --tool-call-parser xlam \ + --tensor-parallel-size 1 +``` + +Note: Ensure that the tool parser plugin file is downloaded and that the path specified in `--tool-parser-plugin` correctly points to your local copy of the file. The xLAM series models all utilize the **same** tool call parser, so you only need to download it **once** for all models. + +#### Testing with OpenAI API + +Here's a minimal example to test tool usage with the served endpoint: + +```python +import openai +import json + +# Configure the client to use your local vLLM endpoint +client = openai.OpenAI( + base_url="http://localhost:8000/v1", # Default vLLM server URL + api_key="empty" # Can be any string +) + +# Define a tool/function +tools = [ + { + "type": "function", + "function": { + "name": "get_weather", + "description": "Get the current weather for a location", + "parameters": { + "type": "object", + "properties": { + "location": { + "type": "string", + "description": "The city and state, e.g. San Francisco, CA" + }, + "unit": { + "type": "string", + "enum": ["celsius", "fahrenheit"], + "description": "The unit of temperature to return" + } + }, + "required": ["location"] + } + } + } +] + +# Create a chat completion +response = client.chat.completions.create( + model="Salesforce/xLAM-2-1b-fc-r", # Model name doesn't matter, vLLM uses the served model + messages=[ + {"role": "system", "content": "You are a helpful assistant that can use tools."}, + {"role": "user", "content": "What's the weather like in San Francisco?"} + ], + tools=tools, + tool_choice="auto" +) + +# Print the response +print("Assistant's response:") +print(json.dumps(response.model_dump(), indent=2)) +``` + +For more advanced configurations and deployment options, please refer to the [vLLM documentation](https://docs.vllm.ai/en/latest/serving/openai_compatible_server.html). + +## Benchmark Results + +### Berkeley Function-Calling Leaderboard (BFCL v3) +

+BFCL Results +
+Performance comparison of different models on [BFCL leaderboard](https://gorilla.cs.berkeley.edu/leaderboard.html). The rank is based on the overall accuracy, which is a weighted average of different evaluation categories. "FC" stands for function-calling mode in contrast to using a customized "prompt" to extract the function calls. +

+ +### τ-bench Benchmark + +

+Tau-bench Results +
+Success Rate (pass@1) on τ-bench benchmark averaged across at least 5 trials. Our xLAM-2-70b-fc-r model achieves an overall success rate of 56.2% on τ-bench, significantly outperforming the base Llama 3.1 70B Instruct model (38.2%) and other open-source models like DeepSeek v3 (40.6%). Notably, our best model even outperforms proprietary models such as GPT-4o (52.9%) and approaches the performance of more recent models like Claude 3.5 Sonnet (new) (60.1%). +

+ +

+Pass^k curves +
+Pass^k curves measuring the probability that all 5 independent trials succeed for a given task, averaged across all tasks for τ-retail (left) and τ-airline (right) domains. Higher values indicate better consistency of the models. +

+ + +## Ethical Considerations + +This release is for research purposes only in support of an academic paper. Our models, datasets, and code are not specifically designed or evaluated for all downstream purposes. We strongly recommend users evaluate and address potential concerns related to accuracy, safety, and fairness before deploying this model. We encourage users to consider the common limitations of AI, comply with applicable laws, and leverage best practices when selecting use cases, particularly for high-risk scenarios where errors or misuse could significantly impact people's lives, rights, or safety. For further guidance on use cases, refer to our AUP and AI AUP. + +### Model Licenses + +For all Llama relevant models, please also follow corresponding Llama license and terms. Meta Llama 3 is licensed under the Meta Llama 3 Community License, Copyright © Meta Platforms, Inc. All Rights Reserved. + +## Citation + +If you use our model or dataset in your work, please cite our paper: + +```bibtex +@article{prabhakar2025apigen, + title={APIGen-MT: Agentic PIpeline for Multi-Turn Data Generation via Simulated Agent-Human Interplay}, + author={Prabhakar, Akshara and Liu, Zuxin and Zhu, Ming and Zhang, Jianguo and Awalgaonkar, Tulika and Wang, Shiyu and Liu, Zhiwei and Chen, Haolin and Hoang, Thai and others}, + journal={arXiv preprint arXiv:2504.03601}, + year={2025} +} +``` + +Additionally, please check our other awesome related works regarding xLAM series and consider citing them as well: + + +```bibtex +@article{zhang2025actionstudio, + title={ActionStudio: A Lightweight Framework for Data and Training of Action Models}, + author={Zhang, Jianguo and Hoang, Thai and Zhu, Ming and Liu, Zuxin and Wang, Shiyu and Awalgaonkar, Tulika and Prabhakar, Akshara and Chen, Haolin and Yao, Weiran and Liu, Zhiwei and others}, + journal={arXiv preprint arXiv:2503.22673}, + year={2025} +} +``` + +```bibtex +@article{zhang2024xlam, + title={xLAM: A Family of Large Action Models to Empower AI Agent Systems}, + author={Zhang, Jianguo and Lan, Tian and Zhu, Ming and Liu, Zuxin and Hoang, Thai and Kokane, Shirley and Yao, Weiran and Tan, Juntao and Prabhakar, Akshara and Chen, Haolin and others}, + journal={arXiv preprint arXiv:2409.03215}, + year={2024} +} + +``` + +```bibtex +@article{liu2024apigen, + title={Apigen: Automated pipeline for generating verifiable and diverse function-calling datasets}, + author={Liu, Zuxin and Hoang, Thai and Zhang, Jianguo and Zhu, Ming and Lan, Tian and Tan, Juntao and Yao, Weiran and Liu, Zhiwei and Feng, Yihao and RN, Rithesh and others}, + journal={Advances in Neural Information Processing Systems}, + volume={37}, + pages={54463--54482}, + year={2024} +} +``` + +```bibtex +@article{zhang2024agentohana, + title={AgentOhana: Design Unified Data and Training Pipeline for Effective Agent Learning}, + author={Zhang, Jianguo and Lan, Tian and Murthy, Rithesh and Liu, Zhiwei and Yao, Weiran and Tan, Juntao and Hoang, Thai and Yang, Liangwei and Feng, Yihao and Liu, Zuxin and others}, + journal={arXiv preprint arXiv:2402.15506}, + year={2024} +} +``` + diff --git a/config.json b/config.json new file mode 100644 index 0000000..0835c88 --- /dev/null +++ b/config.json @@ -0,0 +1,29 @@ +{ + "_name_or_path": "Salesforce/xLAM-2-3b-fc-r", + "architectures": [ + "Qwen2ForCausalLM" + ], + "attention_dropout": 0.0, + "bos_token_id": 151643, + "eos_token_id": 151645, + "hidden_act": "silu", + "hidden_size": 2048, + "initializer_range": 0.02, + "intermediate_size": 11008, + "max_position_embeddings": 32768, + "max_window_layers": 70, + "model_type": "qwen2", + "num_attention_heads": 16, + "num_hidden_layers": 36, + "num_key_value_heads": 2, + "rms_norm_eps": 1e-06, + "rope_scaling": null, + "rope_theta": 1000000.0, + "sliding_window": null, + "tie_word_embeddings": true, + "torch_dtype": "bfloat16", + 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+ "rstrip": false, + "single_word": false, + "special": false + }, + "151664": { + "content": "<|file_sep|>", + "lstrip": false, + "normalized": false, + "rstrip": false, + "single_word": false, + "special": false + } + }, + "additional_special_tokens": [ + "<|im_start|>", + "<|im_end|>", + "<|object_ref_start|>", + "<|object_ref_end|>", + "<|box_start|>", + "<|box_end|>", + "<|quad_start|>", + "<|quad_end|>", + "<|vision_start|>", + "<|vision_end|>", + "<|vision_pad|>", + "<|image_pad|>", + "<|video_pad|>" + ], + "bos_token": null, + "chat_template": "{# System message #}\n{{- \"<|im_start|>system\\n\" }}\n{%- if messages[0]['role'] == 'system' %}\n {%- set system_message = messages[0]['content'] | trim %}\n {%- set messages = messages[1:] %}\n {{- system_message + \"\\n\" }}\n{%- else %}\n {%- set system_message = \"You are a helpful assistant that can use tools. You are developed by Salesforce xLAM team.\" %}\n {% set format_instruction %}You have access to a set of tools. When using tools, make calls in a single JSON array: \n\n[{\"name\": \"tool_call_name\", \"arguments\": {\"arg1\": \"value1\", \"arg2\": \"value2\"}}, ... (additional parallel tool calls as needed)]\n\nIf no tool is suitable, state that explicitly. If the user's input lacks required parameters, ask for clarification. Do not interpret or respond until tool results are returned. Once they are available, process them or make additional calls if needed. For tasks that don't require tools, such as casual conversation or general advice, respond directly in plain text. The available tools are:{% endset %}\n {{- system_message + \"\\n\" }}\n {%- if tools is not none %}\n {{- format_instruction + \"\\n\\n\" }}\n {%- endif %}\n{%- endif %}\n\n{%- if tools is not none %}\n {%- for func in tools %}\n {{- func | tojson(indent=4) }}\n {{- \"\\n\\n\" }}\n {%- endfor %}\n{%- endif %}\n{{- \"<|im_end|>\" }}\n{%- for message in messages %}\n {%- if message['role'] == 'tool' %}\n {{- \"<|im_start|>tool\\n\" }}\n {%- if message.content is defined and message.content.content is defined %}\n {%- set content = message.content.content %}\n {%- else %}\n {%- set content = message.content %}\n {%- endif %}\n {%- if content is mapping or content is iterable and content is not string %}\n {{- content | tojson }}\n {%- else %}\n {{- content }}\n {%- endif %}\n {{- \"<|im_end|>\" }}\n {%- elif 'tool_calls' in message %}\n {{- \"<|im_start|>assistant\\n\" }}\n {%- if message['tool_calls'] %}\n {{- \"[\" }}\n {%- for tool_call in message.tool_calls %}\n {%- set out = tool_call.function | tojson %}\n {{- out }}\n {%- if not loop.last %}\n {{- \", \" }}\n {%- endif %}\n {%- endfor %}\n {{- \"]\"}}\n {%- elif message['content'] %}\n {{- message['content'] | trim }}\n {%- else %}\n {{- \"[]\\n\" }}\n {%- endif %}\n {{- \"<|im_end|>\" }}\n {%- else %}\n {{- \"<|im_start|>\" + message['role'] + \"\\n\" + message['content'] | trim + \"<|im_end|>\" }}\n {%- endif %}\n{%- endfor %}\n\n{%- if add_generation_prompt %}\n {{- \"<|im_start|>assistant\\n\" }}\n{%- endif %}\n", + "clean_up_tokenization_spaces": false, + "eos_token": "<|im_end|>", + "errors": "replace", + "model_max_length": 16384, + "pad_token": "<|endoftext|>", + "padding_side": "right", + "split_special_tokens": false, + "tokenizer_class": "Qwen2Tokenizer", + "unk_token": null +} diff --git a/vocab.json b/vocab.json new file mode 100644 index 0000000..4e0f3ff --- /dev/null +++ b/vocab.json @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:87a257b04b17642a0688c98cd1df89c398bda4fee532d6f88b38a659ecb4ac8d +size 3383407 diff --git a/xlam_tool_call_parser.py b/xlam_tool_call_parser.py new file mode 100644 index 0000000..2d4e4ae --- /dev/null +++ b/xlam_tool_call_parser.py @@ -0,0 +1,198 @@ +import json +import re +from typing import Dict, List, Sequence, Union +import partial_json_parser +from partial_json_parser.core.options import Allow + +from vllm.entrypoints.openai.protocol import ( + ChatCompletionRequest, DeltaMessage, DeltaToolCall, + DeltaFunctionCall, ExtractedToolCallInformation, ToolCall, FunctionCall +) +from vllm.entrypoints.openai.tool_parsers.abstract_tool_parser import ToolParser, ToolParserManager +from vllm.utils import random_uuid +from vllm.logger import init_logger +from transformers import PreTrainedTokenizerBase +from vllm.entrypoints.openai.tool_parsers.utils import (find_common_prefix, + is_complete_json, + partial_json_loads) + +logger = init_logger(__name__) + +@ToolParserManager.register_module("xlam") +class xLAMToolParser(ToolParser): + def __init__(self, tokenizer: PreTrainedTokenizerBase): + super().__init__(tokenizer) + # State for streaming mode + self.prev_tool_calls: List[Dict] = [] + self.current_tools_sent: List[bool] = [] + self.streamed_args: List[str] = [] + # Remove regex since we're parsing direct JSON + + def extract_tool_calls( + self, + model_output: str, + request: ChatCompletionRequest + ) -> ExtractedToolCallInformation: + try: + # Modified: Direct JSON parsing without looking for ``` + if not model_output.strip().startswith('['): + return ExtractedToolCallInformation( + tools_called=False, + tool_calls=[], + content=model_output + ) + + tool_calls_data = json.loads(model_output) + tool_calls: List[ToolCall] = [] + + for idx, call in enumerate(tool_calls_data): + tool_call = ToolCall( + id=f"call_{idx}_{random_uuid()}", + type="function", + function=FunctionCall( + name=call["name"], + arguments=json.dumps(call["arguments"]) + ) + ) + tool_calls.append(tool_call) + + return ExtractedToolCallInformation( + tools_called=True, + tool_calls=tool_calls, + content=None + ) + + except Exception: + logger.exception("Error extracting tool calls") + return ExtractedToolCallInformation( + tools_called=False, + tool_calls=[], + content=model_output + ) + + def extract_tool_calls_streaming( + self, + previous_text: str, + current_text: str, + delta_text: str, + previous_token_ids: Sequence[int], + current_token_ids: Sequence[int], + delta_token_ids: Sequence[int], + request: ChatCompletionRequest, + ) -> Union[DeltaMessage, None]: + if not current_text.strip().startswith('['): + return DeltaMessage(content=delta_text) + + flags = Allow.ALL if self.current_tool_name_sent else Allow.ALL & ~Allow.STR + + try: + tool_call_arr = [] + is_complete = [] + try: + # Parse the JSON array + start_idx = 0 + while start_idx < len(current_text): + obj, end_idx = partial_json_loads(current_text[start_idx:], flags) + is_complete.append( + is_complete_json(current_text[start_idx:start_idx + end_idx]) + ) + start_idx += end_idx + tool_call_arr.append(obj) + except partial_json_parser.core.exceptions.MalformedJSON: + logger.debug('not enough tokens to parse into JSON yet') + return None + + # Get current tool call based on state + current_tool_call: Dict = tool_call_arr[self.current_tool_id] \ + if len(tool_call_arr) > 0 else {} + + # Case 1: No tools parsed yet + if len(tool_call_arr) == 0: + return None + + # Case 2: Starting a new tool in array + elif (len(tool_call_arr) > 0 + and len(tool_call_arr) > self.current_tool_id + 1): + + # Handle any remaining arguments from previous tool + if self.current_tool_id >= 0: + cur_arguments = current_tool_call.get("arguments") + if cur_arguments: + cur_args_json = json.dumps(cur_arguments) + sent = len(self.streamed_args[self.current_tool_id]) + argument_diff = cur_args_json[sent:] + + if argument_diff: + delta = DeltaMessage(tool_calls=[ + DeltaToolCall( + index=self.current_tool_id, + function=DeltaFunctionCall( + arguments=argument_diff + ).model_dump(exclude_none=True) + ) + ]) + self.streamed_args[self.current_tool_id] += argument_diff + return delta + + # Setup new tool + self.current_tool_id = len(tool_call_arr) - 1 + self.current_tools_sent.append(False) + self.streamed_args.append("") + logger.debug("starting new tool %d", self.current_tool_id) + return None + + # Case 3: Send tool name if not sent yet + elif not self.current_tools_sent[self.current_tool_id]: + function_name = current_tool_call.get("name") + if function_name: + delta = DeltaMessage(tool_calls=[ + DeltaToolCall( + index=self.current_tool_id, + type="function", + id=f"call_{self.current_tool_id}_{random_uuid()}", + function=DeltaFunctionCall( + name=function_name + ).model_dump(exclude_none=True) + ) + ]) + self.current_tools_sent[self.current_tool_id] = True + return delta + return None + + # Case 4: Stream arguments + else: + cur_arguments = current_tool_call.get("arguments") + if cur_arguments: + sent = len(self.streamed_args[self.current_tool_id]) + cur_args_json = json.dumps(cur_arguments) + prev_arguments = self.prev_tool_calls[self.current_tool_id].get("arguments") + + argument_diff = None + if is_complete[self.current_tool_id]: + argument_diff = cur_args_json[sent:] + elif prev_arguments: + prev_args_json = json.dumps(prev_arguments) + if cur_args_json != prev_args_json: + prefix = find_common_prefix(prev_args_json, cur_args_json) + argument_diff = prefix[sent:] + + if argument_diff is not None: + delta = DeltaMessage(tool_calls=[ + DeltaToolCall( + index=self.current_tool_id, + function=DeltaFunctionCall( + arguments=argument_diff + ).model_dump(exclude_none=True) + ) + ]) + self.streamed_args[self.current_tool_id] += argument_diff + return delta + + self.prev_tool_calls = tool_call_arr + return None + + except Exception: + logger.exception("Error in streaming tool calls") + logger.debug("Skipping chunk due to streaming error") + return None +