Initial setup

AI_PROVIDERS_GUIDE.md

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+# AI Providers Guide
+
+## Supported AI Providers
+
+Your AI Interview Assistant now supports multiple AI providers! Here's how to set up and use each one:
+
+## 🤖 **OpenAI (GPT)**
+- **Models Available**: GPT-4o, GPT-4o-mini, GPT-4-turbo, GPT-3.5-turbo
+- **API Key**: Get from [OpenAI Platform](https://platform.openai.com/account/api-keys)
+- **Recommended Model**: GPT-4o-mini (good balance of speed and quality)
+- **Cost**: Pay per token usage
+
+## 🧠 **Anthropic (Claude)**  
+- **Models Available**: Claude-3.5-Sonnet, Claude-3.5-Haiku, Claude-3-Opus
+- **API Key**: Get from [Anthropic Console](https://console.anthropic.com/)
+- **Recommended Model**: Claude-3.5-Sonnet (excellent reasoning)
+- **Cost**: Pay per token usage
+
+## 🔍 **Google (Gemini)**
+- **Models Available**: Gemini-1.5-Pro, Gemini-1.5-Flash, Gemini-Pro
+- **API Key**: Get from [Google AI Studio](https://aistudio.google.com/app/apikey)
+- **Recommended Model**: Gemini-1.5-Flash (fast and efficient)
+- **Cost**: Free tier available, then pay per token
+
+## 🏠 **Ollama (Local)**
+- **Models Available**: Llama3.2, Llama3.1, Mistral, CodeLlama, Phi3
+- **Setup**: Install [Ollama](https://ollama.ai/) locally
+- **No API Key Required**: Runs completely on your machine
+- **Cost**: Free (uses your computer's resources)
+
+## 🚀 **How to Setup**
+
+### 1. **Choose Your Provider**
+- Open the extension side panel
+- Select your preferred AI provider from the dropdown
+
+### 2. **Select Model** 
+- Choose the specific model you want to use
+- Different models have different capabilities and speeds
+
+### 3. **Add API Key** (if required)
+- Enter your API key for the selected provider
+- Ollama doesn't require an API key
+- Keys are stored securely in Chrome's storage
+
+### 4. **Start Using**
+- Click "Start Listening" to begin audio capture
+- The extension will use your selected AI provider for responses
+
+## 💡 **Tips**
+
+- **For Speed**: Use GPT-4o-mini, Gemini-1.5-Flash, or Claude-3.5-Haiku
+- **For Quality**: Use GPT-4o, Claude-3.5-Sonnet, or Gemini-1.5-Pro  
+- **For Privacy**: Use Ollama (runs locally, no data sent to servers)
+- **For Free Usage**: Try Google Gemini's free tier or set up Ollama
+
+## 🔧 **Ollama Setup**
+
+If you want to use Ollama (local AI):
+
+1. Install Ollama from [ollama.ai](https://ollama.ai/)
+2. Run: `ollama pull llama3.2` (or your preferred model)
+3. Make sure Ollama is running: `ollama serve`
+4. Select "Ollama (Local)" in the extension
+
+## 🆘 **Troubleshooting**
+
+- **"API key not set"**: Make sure you've entered a valid API key
+- **"Failed to connect"**: Check your internet connection (or Ollama service for local)
+- **"Invalid API key"**: Verify your API key is correct and has sufficient credits
+- **Slow responses**: Try switching to a faster model like GPT-4o-mini or Gemini-1.5-Flash
+
+## 🔒 **Privacy & Security**
+
+- API keys are stored locally in Chrome's secure storage
+- Only the selected provider receives your audio transcriptions
+- Ollama option keeps everything completely local
+- No audio data is stored permanently