add deepseek provider

src/shelloracle/providers/deepseek.py

@@ -0,0 +1,32 @@
+from collections.abc import AsyncIterator
+
+from openai import APIError, AsyncOpenAI
+
+from shelloracle.providers import Provider, ProviderError, Setting, system_prompt
+
+
+class Deepseek(Provider):
+    name = "Deepseek"
+
+    api_key = Setting(default="")
+    model = Setting(default="deepseek-chat")
+
+    def __init__(self):
+        if not self.api_key:
+            msg = "No API key provided"
+            raise ProviderError(msg)
+        self.client = AsyncOpenAI(base_url="https://api.deepseek.com/v1", api_key=self.api_key)
+
+    async def generate(self, prompt: str) -> AsyncIterator[str]:
+        try:
+            stream = await self.client.chat.completions.create(
+                model=self.model,
+                messages=[{"role": "system", "content": system_prompt}, {"role": "user", "content": prompt}],
+                stream=True,
+            )
+            async for chunk in stream:
+                if chunk.choices[0].delta.content is not None:
+                    yield chunk.choices[0].delta.content
+        except APIError as e:
+            msg = f"Something went wrong while querying OpenAI: {e}"
+            raise ProviderError(msg) from e