fix config

README.md

@@ -89,11 +89,43 @@ aigpt config set atproto.password your-password
 aigpt config list
 ```
 
+### AIモデルの設定
+```bash
+# Ollamaのデフォルトモデルを変更
+aigpt config set providers.ollama.default_model llama3
+
+# OpenAIのデフォルトモデルを変更  
+aigpt config set providers.openai.default_model gpt-4
+
+# Ollamaホストの設定
+aigpt config set providers.ollama.host http://localhost:11434
+
+# 設定の確認
+aigpt config get providers.ollama.default_model
+```
+
 ### データ保存場所
 - 設定: `~/.config/syui/ai/gpt/config.json`
 - データ: `~/.config/syui/ai/gpt/data/`
 - 仮想環境: `~/.config/syui/ai/gpt/venv/`
 
+### 設定ファイル構造
+```json
+{
+  "providers": {
+    "ollama": {
+      "host": "http://localhost:11434",
+      "default_model": "qwen3"
+    },
+    "openai": {
+      "api_key": null,
+      "default_model": "gpt-4o-mini"
+    }
+  },
+  "default_provider": "ollama"
+}
+```
+
 ## 使い方
 
 ### 会話する

src/aigpt/ai_provider.py

@@ -187,9 +187,18 @@ Recent memories:
         return mood_responses.get(persona_state.current_mood, "I see.")
 
 
-def create_ai_provider(provider: str = "ollama", model: str = "qwen2.5", **kwargs) -> AIProvider:
+def create_ai_provider(provider: str = "ollama", model: Optional[str] = None, **kwargs) -> AIProvider:
     """Factory function to create AI providers"""
     if provider == "ollama":
+        # Get model from config if not provided
+        if model is None:
+            try:
+                from .config import Config
+                config = Config()
+                model = config.get('providers.ollama.default_model', 'qwen2.5')
+            except:
+                model = 'qwen2.5'  # Fallback to default
+        
         # Try to get host from config if not provided in kwargs
         if 'host' not in kwargs:
             try:
@@ -202,6 +211,14 @@ def create_ai_provider(provider: str = "ollama", model: str = "qwen2.5", **kwarg
                 pass  # Use environment variable or default
         return OllamaProvider(model=model, **kwargs)
     elif provider == "openai":
+        # Get model from config if not provided
+        if model is None:
+            try:
+                from .config import Config
+                config = Config()
+                model = config.get('providers.openai.default_model', 'gpt-4o-mini')
+            except:
+                model = 'gpt-4o-mini'  # Fallback to default
         return OpenAIProvider(model=model, **kwargs)
     else:
         raise ValueError(f"Unknown provider: {provider}")