Replace Raix with direct API client implementations

[obie]

Summary

• Replaced Raix dependency with direct API client implementations for better control and clarity
• Added three new model adapters: Anthropic, OpenAI, and OpenRouter
• Fixed rubocop issues and improved console experience

Changes

Removed Dependencies

• Removed raix gem dependency

Added Dependencies

• ruby-openai (~> 7.0) - Official OpenAI Ruby client
• anthropic (~> 0.3) - Official Anthropic Ruby client
• open_router (~> 0.3) - OpenRouter API client

New Model Adapters

1. Desiru::Models::Anthropic - Direct integration with Anthropic's Claude API
2. Desiru::Models::OpenAI - Direct integration with OpenAI's API with dynamic model fetching
3. Desiru::Models::OpenRouter - Integration with OpenRouter for access to multiple models

Key Features

• Dynamic model fetching for OpenAI and OpenRouter (cached for 1 hour)
• Proper error handling for each provider
• Consistent interface across all adapters
• Increased default max_tokens from 1000 to 4096 to prevent truncated responses

Console Improvements

• Added dotenv gem for loading environment variables from .env file
• Better error messages when configuration fails
• Pre-loaded common modules ($predict, $cot) for quick experimentation
• Added debug_call helper to inspect raw LLM responses
• Fixed namespace issues by including necessary modules

Updated Files

• All example files updated to use new model classes
• .env.example includes OpenRouter configuration
• bin/console and bin/examples support all three providers
• Fixed prompt formatting in ChainOfThought and Predict modules for better LLM responses

Rubocop Compliance

• Fixed all 30 rubocop offenses
• All tests pass

Testing

# Configure your API key in .env
echo "ANTHROPIC_API_KEY=your-key-here" >> .env

# Try the console
bin/console

# In console:
cot = ChainOfThought.new(Signature.new('problem -> solution'))
result = cot.call(problem: "How do I reverse a string in Ruby?")
puts result.solution

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com