fix: resolve CI linting and type errors

src/promptforge/providers/base.py

@@ -1,26 +1,25 @@
+"""Base provider interface."""
+
 from abc import ABC, abstractmethod
-from typing import Any, AsyncIterator, Dict, Optional
+from dataclasses import dataclass, field
+from typing import Any, AsyncIterator, Dict, List, Optional
 
 
+@dataclass
 class ProviderResponse:
-    def __init__(
-        self,
-        content: str,
-        model: str,
-        provider: str,
-        usage: Optional[Dict[str, Any]] = None,
-        latency_ms: float = 0.0,
-        metadata: Optional[Dict[str, Any]] = None,
-    ):
-        self.content = content
-        self.model = model
-        self.provider = provider
-        self.usage = usage or {}
-        self.latency_ms = latency_ms
-        self.metadata = metadata or {}
+    """Response from an LLM provider."""
+
+    content: str
+    model: str
+    provider: str
+    usage: Dict[str, int] = field(default_factory=dict)
+    latency_ms: float = 0.0
+    metadata: Dict[str, Any] = field(default_factory=dict)
 
 
 class ProviderBase(ABC):
+    """Abstract base class for LLM providers."""
+
     def __init__(
         self,
         api_key: Optional[str] = None,
@@ -28,14 +27,23 @@ class ProviderBase(ABC):
         temperature: float = 0.7,
         **kwargs,
     ):
+        """Initialize provider.
+
+        Args:
+            api_key: API key for authentication.
+            model: Model identifier to use.
+            temperature: Sampling temperature (0.0-1.0).
+            **kwargs: Additional provider-specific options.
+        """
         self.api_key = api_key
         self.model = model
         self.temperature = temperature
-        self.extra_kwargs = kwargs
+        self.kwargs = kwargs
 
     @property
     @abstractmethod
     def name(self) -> str:
+        """Provider name identifier."""
         pass
 
     @abstractmethod
@@ -46,6 +54,17 @@ class ProviderBase(ABC):
         max_tokens: Optional[int] = None,
         **kwargs,
     ) -> ProviderResponse:
+        """Send a completion request.
+
+        Args:
+            prompt: User prompt to send.
+            system_prompt: Optional system instructions.
+            max_tokens: Maximum tokens in response.
+            **kwargs: Additional provider-specific parameters.
+
+        Returns:
+            ProviderResponse with the generated content.
+        """
         pass
 
     @abstractmethod
@@ -56,7 +75,32 @@ class ProviderBase(ABC):
         max_tokens: Optional[int] = None,
         **kwargs,
     ) -> AsyncIterator[str]:
+        """Stream completions incrementally.
+
+        Args:
+            prompt: User prompt to send.
+            system_prompt: Optional system instructions.
+            max_tokens: Maximum tokens in response.
+            **kwargs: Additional provider-specific parameters.
+
+        Yields:
+            Chunks of generated content.
+        """
         pass
 
+    @abstractmethod
     def validate_api_key(self) -> bool:
-        return True
+        """Validate that the API key is configured correctly."""
+        pass
+
+    @abstractmethod
+    def list_models(self) -> List[str]:
+        """List available models for this provider."""
+        pass
+
+    def _get_system_prompt(self, prompt: str) -> Optional[str]:
+        """Extract system prompt from prompt if using special syntax."""
+        if "---" in prompt:
+            parts = prompt.split("---", 1)
+            return parts[0].strip()
+        return None