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src/daemon_boyfriend/services/providers/anthropic.py

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+"""Anthropic (Claude) provider implementation."""
+
+import logging
+
+import anthropic
+
+from .base import AIProvider, AIResponse, Message
+
+logger = logging.getLogger(__name__)
+
+
+class AnthropicProvider(AIProvider):
+    """Anthropic Claude API provider."""
+
+    def __init__(self, api_key: str, model: str = "claude-sonnet-4-20250514") -> None:
+        self.client = anthropic.AsyncAnthropic(api_key=api_key)
+        self.model = model
+
+    @property
+    def provider_name(self) -> str:
+        return "anthropic"
+
+    async def generate(
+        self,
+        messages: list[Message],
+        system_prompt: str | None = None,
+        max_tokens: int = 1024,
+        temperature: float = 0.7,
+    ) -> AIResponse:
+        """Generate a response using Claude."""
+        # Build messages list (Anthropic format)
+        api_messages = [{"role": m.role, "content": m.content} for m in messages]
+
+        logger.debug(f"Sending {len(api_messages)} messages to Anthropic")
+
+        response = await self.client.messages.create(
+            model=self.model,
+            max_tokens=max_tokens,
+            temperature=temperature,
+            system=system_prompt or "",
+            messages=api_messages,  # type: ignore[arg-type]
+        )
+
+        # Extract text from response
+        content = ""
+        for block in response.content:
+            if block.type == "text":
+                content += block.text
+
+        usage = {
+            "input_tokens": response.usage.input_tokens,
+            "output_tokens": response.usage.output_tokens,
+        }
+
+        return AIResponse(
+            content=content,
+            model=response.model,
+            usage=usage,
+        )