first commit

backend/app/llm/__init__.py

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+from .factory import LLMFactory
+from .base import BaseLLMClient
+from .dashscope import DashScopeClient
+from .openai import OpenAIClient
+from .anthropic import AnthropicClient
+
+
+__all__ = [
+    "LLMFactory",
+    "BaseLLMClient",
+    "DashScopeClient",
+    "OpenAIClient",
+    "AnthropicClient",
+]

backend/app/llm/anthropic.py

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+from .base import BaseLLMClient
+
+
+class AnthropicClient(BaseLLMClient):
+    def chat(self, messages, **kwargs):
+        pass
+
+    def stream_chat(self, messages, **kwargs):
+        pass

backend/app/llm/base.py

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+from abc import ABC, abstractmethod
+
+
+class BaseLLMClient(ABC):
+    def __init__(self, config):
+        self.config = config
+
+    @abstractmethod
+    def chat(self, messages, **kwargs):
+        pass
+
+    @abstractmethod
+    def stream_chat(self, messages, **kwargs):
+        pass

backend/app/llm/dashscope.py

@@ -0,0 +1,9 @@
+from .base import BaseLLMClient
+
+
+class DashScopeClient(BaseLLMClient):
+    def chat(self, messages, **kwargs):
+        pass
+
+    def stream_chat(self, messages, **kwargs):
+        pass

backend/app/llm/factory.py

@@ -0,0 +1,22 @@
+from .dashscope import DashScopeClient
+from .openai import OpenAIClient
+from .anthropic import AnthropicClient
+
+
+class LLMFactory:
+    _clients = {
+        "dashscope": DashScopeClient,
+        "openai": OpenAIClient,
+        "anthropic": AnthropicClient,
+    }
+
+    @classmethod
+    def create_client(cls, provider, config):
+        client_class = cls._clients.get(provider)
+        if not client_class:
+            raise ValueError(f"不支持的 LLM 提供商: {provider}")
+        return client_class(config)
+
+    @classmethod
+    def register_client(cls, provider, client_class):
+        cls._clients[provider] = client_class

backend/app/llm/openai.py

@@ -0,0 +1,9 @@
+from .base import BaseLLMClient
+
+
+class OpenAIClient(BaseLLMClient):
+    def chat(self, messages, **kwargs):
+        pass
+
+    def stream_chat(self, messages, **kwargs):
+        pass