diff --git a/simplemind/core/__init__.py b/simplemind/core/__init__.py
index 23aebb8..0b5ce1a 100644
--- a/simplemind/core/__init__.py
+++ b/simplemind/core/__init__.py
@@ -1,7 +1,7 @@
 from typing import Dict, Any, Optional
 from .models import AIResponse
 from ..concepts.context import Context
-from ..integrations.base import BaseClientProvider
+from ..providers.base import BaseClientProvider
 
 
 class SimpleMind:
diff --git a/simplemind/core/client.py b/simplemind/core/client.py
index a51b4b7..f27de43 100644
--- a/simplemind/core/client.py
+++ b/simplemind/core/client.py
@@ -1,11 +1,11 @@
 from typing import Optional
 from simplemind.core.models import Conversation, AIResponse
 from simplemind.concepts.context import Context
-from simplemind.integrations.openai import OpenAI
-from simplemind.integrations.anthropic import Anthropic
+from simplemind.providers.openai import OpenAI
+from simplemind.providers.anthropic import Anthropic
 import logging
-
-logger = logging.getLogger(__name__)
+from .errors import ProviderError
+from .logger import logger
 
 
 class Client:
@@ -20,7 +20,9 @@ class Client:
             "anthropic": Anthropic(api_key=self.api_key),
         }
 
-    def create_conversation(self, provider: str = "openai") -> Conversation:
+    def create_conversation(
+        self, provider: str = "openai", context: Optional[Context] = None
+    ) -> Conversation:
         if provider not in self.providers:
             raise ValueError(f"Provider '{provider}' not supported.")
         return self.providers[provider].create_conversation(
@@ -30,7 +32,7 @@ class Client:
     def _handle_api_error(self, error: Exception, operation: str):
         """Handle API errors in a consistent way."""
         logger.error(f"Error during {operation}: {str(error)}")
-        raise RuntimeError(f"Failed to {operation}: {str(error)}")
+        raise ProviderError(f"Failed to {operation}: {str(error)}") from error
 
     def send_message(
         self, conversation: Conversation, message: str, provider: str = "openai"
diff --git a/simplemind/core/config.py b/simplemind/core/config.py
index a7d1813..6e6e8f8 100644
--- a/simplemind/core/config.py
+++ b/simplemind/core/config.py
@@ -1,13 +1,20 @@
+from pydantic import Field, field_validator
 from pydantic_settings import BaseSettings
 from typing import Optional
 
 
 class Settings(BaseSettings):
-    openai_api_key: Optional[str] = None
-    anthropic_api_key: Optional[str] = None
-    ollama_host_url: Optional[str] = None
-    default_model: str = "gpt-4"
-    log_level: str = "INFO"
+    openai_api_key: Optional[str] = Field(None, env="OPENAI_API_KEY")
+    anthropic_api_key: Optional[str] = Field(None, env="ANTHROPIC_API_KEY")
+    ollama_host_url: Optional[str] = Field(None, env="OLLAMA_HOST_URL")
+    default_model: str = Field("gpt-4", env="DEFAULT_MODEL")
+    log_level: str = Field("INFO", env="LOG_LEVEL")
+
+    @field_validator("*", mode="before")
+    def check_required(cls, v, info):
+        if info.field_name in info.data and info.data[info.field_name] is None:
+            raise ValueError(f"{info.field_name} is required")
+        return v
 
     class Config:
         env_file = ".env"
diff --git a/simplemind/integrations/__init__.py b/simplemind/providers/__init__.py
similarity index 100%
rename from simplemind/integrations/__init__.py
rename to simplemind/providers/__init__.py
diff --git a/simplemind/integrations/anthropic.py b/simplemind/providers/anthropic.py
similarity index 100%
rename from simplemind/integrations/anthropic.py
rename to simplemind/providers/anthropic.py
diff --git a/simplemind/integrations/base.py b/simplemind/providers/base.py
similarity index 100%
rename from simplemind/integrations/base.py
rename to simplemind/providers/base.py
diff --git a/simplemind/integrations/ollama.py b/simplemind/providers/ollama.py
similarity index 100%
rename from simplemind/integrations/ollama.py
rename to simplemind/providers/ollama.py
diff --git a/simplemind/integrations/openai.py b/simplemind/providers/openai.py
similarity index 100%
rename from simplemind/integrations/openai.py
rename to simplemind/providers/openai.py
diff --git a/t.py b/t.py
index 0f4aa90..a096c19 100644
--- a/t.py
+++ b/t.py
@@ -27,7 +27,8 @@ aiclient = Client(
 print(aiclient.available_models)
 
 # Example usage
-conversation = aiclient.create_conversation(provider="anthropic", context=ctx)
+conversation = aiclient.create_conversation(provider="anthropic")
+conversation.set_context(ctx)
 response = aiclient.send_message(
     conversation, "Who is Kenneth Reitz?", provider="anthropic"
 )
diff --git a/tests/test_openai.py b/tests/test_openai.py
index 7a41224..fd2d54c 100644
--- a/tests/test_openai.py
+++ b/tests/test_openai.py
@@ -1,6 +1,6 @@
 import unittest
 from unittest.mock import patch, MagicMock
-from simplemind.integrations.openai import OpenAI
+from simplemind.providers.openai import OpenAI
 from simplemind.core.errors import AuthenticationError, ProviderError