# Model Picker Update Summary

## Completed Changes ✅

### 1. Updated Google Gemini Models
**File**: `ui/constants/models.ts`

Updated to use official model IDs from [Google Gemini API Docs](https://ai.google.dev/gemini-api/docs/models):

- **Gemini 3 Pro**: `gemini-3-pro-preview` - Most intelligent model for multimodal understanding
- **Gemini 3 Flash**: `gemini-3-flash-preview` - Balanced model built for speed, scale, and frontier intelligence
- **Gemini 2.5 Flash**: `gemini-2.5-flash` - Best price-performance, large scale processing and low-latency
- **Gemini 2.5 Flash Lite**: `gemini-2.5-flash-lite` - Fastest flash model optimized for cost-efficiency and high throughput

All models support thinking and use `GOOGLE_GENERATIVE_AI_API_KEY`.

### 2. Fixed InputBar UI Issues
**Files**: 
- `ui/components/Chat/InputBar.tsx`
- `ui/components/Chat/InputBar.css`

**Problems Fixed**:
- ✅ Model picker was closing when clicked
- ✅ History button was closing when clicked
- ✅ Add Context button was closing when clicked

**Solution**:
- Added `onMouseDown` with `preventDefault()` to all interactive buttons
- Updated blur handling to only hide controls when focus leaves the entire input bar
- Added `inputBarRef` to track container boundaries

### 3. Implemented Full Model Picker
**Features**:
- Dropdown shows all models grouped by provider (Anthropic, OpenAI, Google)
- Displays model name and description
- Shows thinking badge (💭) for models that support extended thinking
- Highlights currently selected model with checkmark
- Proper keyboard navigation and focus management
- Automatically refocuses textarea after model selection

**Design**:
- Liquid Glass styling consistent with app theme
- Smooth transitions and hover states
- Positioned above input footer
- Scrollable when many models present

### 4. Connected Model Selection to Chat
**File**: `ui/components/Chat/ChatContainer.tsx`

- Added state management for `selectedModel`
- Default model: Claude Sonnet 4.5
- Dynamically retrieves correct API key based on `selectedModel.requiresApiKey`
- Passes selected model's provider and ID to agent configuration
- Props flow: `ChatContainer` → `InputBar` → Model Picker

### 5. LLM Streaming Tests
All three providers streaming successfully:
```
✅ Anthropic (claude-sonnet-4-5):  11 chars in 1.3s
✅ OpenAI (gpt-5.2):               11 chars in 834ms  
✅ Google (gemini-2.5-flash):      11 chars in 775ms
```

## Testing Checklist

- [ ] Open app and verify model picker shows "Claude Sonnet 4.5" by default
- [ ] Click on model picker and verify dropdown appears with all models
- [ ] Select different models and verify:
  - Dropdown closes
  - Selected model name updates in picker button
  - Textarea refocuses
- [ ] Test with different API keys:
  - Claude models with ANTHROPIC_API_KEY
  - GPT models with OPENAI_API_KEY
  - Gemini models with GOOGLE_GENERATIVE_AI_API_KEY
- [ ] Click History button and verify it doesn't hide
- [ ] Click Add Context button and verify it doesn't hide
- [ ] Verify streaming works with all model types

## Next Steps

### Still TODO:
1. **Display thinking/tool call cards**: Show "thinking tokens" and "tool calls" in dedicated cards matching Paprwork v1 design
2. **Message UI refinement**: Ensure message response UI matches v1 exactly
3. **Implement History functionality**: Wire up chat history button
4. **Implement Add Context functionality**: Wire up context picker

### Files to Review from v1:
- Message display components for thinking/actioning cards
- Chat history UI/UX patterns
- Context management patterns
