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Agent Selection in Web UI - Implementation Summary

Overview

Successfully implemented agent selection functionality in the web UI, allowing users to choose between different AI providers (OpenAI, Claude) and models directly from the chat interface.

What Was Implemented

1. Backend API Changes

New Endpoint: /api/agents (GET)

  • Returns all available AI providers and their models
  • Includes model metadata (name, description, context window, pricing)
  • Response includes 2 providers (OpenAI, Claude) with 14 total models

Updated Endpoint: /api/agent/chat (POST)

  • Now accepts optional provider and model parameters
  • Defaults to OpenAI if not specified
  • Properly routes requests to the selected provider

Updated Function: get_agent_instance()

  • Now accepts provider and model parameters
  • Creates agent instances with the specified configuration
  • Maintains backward compatibility with existing code

2. Frontend UI Changes

Updated agent.html

  • Added agent provider selector dropdown
  • Added agent model selector dropdown
  • Displays model information (context window, description)
  • Reorganized card header for better layout

Updated agent.js

  • Loads available agents on page initialization
  • Dynamically populates provider and model dropdowns
  • Handles provider/model selection changes
  • Passes selected provider/model to all API calls
  • Shows user-friendly alerts when switching agents

3. Testing

Created tests/test_agent_selection.py

  • Tests /api/agents endpoint
  • Tests agent chat with provider selection
  • Tests agent chat without provider (default behavior)
  • All 3 tests passing ✅

Created test_ui_verification.py

  • Verifies web UI loads correctly
  • Verifies JavaScript and CSS load
  • Verifies agents endpoint works
  • All checks passing ✅

Files Modified

  1. src/api/app.py

    • Added model registry imports
    • Added /api/agents endpoint
    • Updated get_agent_instance() function
    • Updated /api/agent/chat endpoint
    • Added static file serving for web UI

  2. src/web/agent.html

    • Added provider selector UI
    • Added model selector UI
    • Reorganized header layout

  3. src/web/agent.js

    • Added agent loading logic
    • Added dropdown population functions
    • Added event handlers for selection changes
    • Updated message sending to include provider/model

Files Created

  1. tests/test_agent_selection.py - Comprehensive test suite
  2. docs/AGENT_SELECTION.md - Feature documentation
  3. test_ui_verification.py - Quick verification script

Key Features

✅ Provider Selection - Choose OpenAI or Claude
✅ Model Selection - 6 OpenAI models, 8 Claude models
✅ Model Information - Context window and description displayed
✅ Dynamic Loading - Agents loaded from API on startup
✅ Persistent Selection - Selected agent used for all messages
✅ Backward Compatible - Works without provider/model parameters
✅ Error Handling - Clear error messages for missing API keys
✅ Fully Tested - All functionality tested and verified

How to Use

For End Users

  1. Open http://localhost:5000/src/web/agent.html
  2. In the top-right corner, select your preferred:
    • Agent Provider (OpenAI or Claude)
    • Model (specific model for that provider)
  3. Start chatting - the selected agent will be used for all messages
  4. Switch agents anytime by selecting a different provider/model

For Developers

// Send message with specific agent
const response = await fetch('/api/agent/chat', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
        message: 'Your message',
        provider: 'claude',
        model: 'claude-3-5-sonnet-20241022'
    })
});

Testing Results

============================================================
Agent Selection Tests
============================================================
Testing /api/agents endpoint...
✅ /api/agents endpoint test passed!
   - Found 2 providers
   - OpenAI: 6 models
   - Claude: 8 models

Testing /api/agent/chat with provider selection...
✅ Agent chat with OpenAI provider test passed!

Testing /api/agent/chat without provider (default)...
✅ Agent chat without provider test passed!

============================================================
Results: 3/3 tests passed
============================================================

Verification

All systems operational:

  • ✅ Web UI loads (agent.html)
  • ✅ JavaScript loads (agent.js)
  • ✅ Styles load (styles.css)
  • ✅ Agents endpoint works
  • ✅ Agent chat with provider selection works
  • ✅ Agent chat without provider works (default)

Next Steps (Optional Enhancements)

  • Save user's preferred agent to localStorage
  • Display model pricing information
  • Show token usage per model
  • Add model comparison view
  • Support for custom model configurations
  • Model performance metrics

Related GitHub Issue

  • Issue #31 - Agent Selection in Web UI

Conclusion

The agent selection feature is fully implemented, tested, and ready for use. Users can now easily switch between different AI providers and models directly from the web UI chat interface.