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LLM Provider Configuration

This document describes the LLM provider configuration system for the Statistics Agent Team.

Overview

The system now supports configurable LLM providers, allowing you to choose between: - Gemini (Google) - Default - Claude (Anthropic) - Planned - OpenAI - Planned - Ollama (Local) - Planned

Current Status

✅ Gemini: Fully supported and tested ⏳ Claude: Configuration ready, ADK integration pending ⏳ OpenAI: Configuration ready, ADK integration pending ⏳ Ollama: Configuration ready, ADK integration pending

Configuration

Environment Variables

LLM Provider Selection

# Choose your LLM provider
export LLM_PROVIDER=gemini  # Options: gemini, claude, openai, ollama

Provider-Specific API Keys

# For Gemini (default)
export GOOGLE_API_KEY=your-google-api-key
# or
export GEMINI_API_KEY=your-google-api-key

# For Claude (when supported)
export ANTHROPIC_API_KEY=your-anthropic-api-key
# or
export CLAUDE_API_KEY=your-anthropic-api-key

# For OpenAI (when supported)
export OPENAI_API_KEY=your-openai-api-key

# For Ollama (when supported)
export OLLAMA_URL=http://localhost:11434

Model Selection

# Override the default model for your chosen provider
export LLM_MODEL=gemini-2.0-flash-exp  # For Gemini
# export LLM_MODEL=claude-3-5-sonnet-20241022  # For Claude
# export LLM_MODEL=gpt-4  # For OpenAI
# export LLM_MODEL=llama3.2  # For Ollama

Generic Options

# Use generic API key (overrides provider-specific keys)
export LLM_API_KEY=your-api-key

# Custom base URL (for Ollama or custom endpoints)
export LLM_BASE_URL=http://localhost:11434

Default Models by Provider

Provider Default Model
Gemini gemini-2.0-flash-exp
Claude claude-3-5-sonnet-20241022
OpenAI gpt-4
Ollama llama3.2

Architecture

Model Factory

The pkg/llm/factory.go file provides a centralized ModelFactory that: 1. Reads configuration from environment variables 2. Creates the appropriate LLM model based on LLM_PROVIDER 3. Returns a model.LLM interface compatible with Google ADK

Integration Points

All agents use the model factory: - Research Agent (agents/research/main.go) - Verification Agent (agents/verification/main.go) - Orchestration Agent (agents/orchestration/main.go)

Example usage: 

// Create model using factory
modelFactory := llm.NewModelFactory(cfg)
model, err := modelFactory.CreateModel(ctx)
if err != nil {
    return nil, fmt.Errorf("failed to create model: %w", err)
}

log.Printf("Agent: Using %s", modelFactory.GetProviderInfo())

Examples

Using Gemini (Default)

export GOOGLE_API_KEY=your-google-api-key
make run-all-eino

Using Claude (When Supported)

export LLM_PROVIDER=claude
export ANTHROPIC_API_KEY=your-anthropic-api-key
export LLM_MODEL=claude-3-5-sonnet-20241022
make run-all-eino

Using OpenAI (When Supported)

export LLM_PROVIDER=openai
export OPENAI_API_KEY=your-openai-api-key
export LLM_MODEL=gpt-4-turbo
make run-all-eino

Using Ollama (When Supported)

export LLM_PROVIDER=ollama
export OLLAMA_URL=http://localhost:11434
export LLM_MODEL=llama3.2
make run-all-eino

Future Development

Claude Support

Claude support requires: 1. ADK integration or custom HTTP client for Anthropic API 2. Adapter to convert Claude responses to ADK's model.LLM interface 3. Testing with Claude-specific prompt engineering

OpenAI Support

OpenAI support requires: 1. ADK integration or custom HTTP client for OpenAI API 2. Adapter to convert OpenAI responses to ADK's model.LLM interface 3. Testing with OpenAI-specific parameters

Ollama Support

Ollama support requires: 1. Custom HTTP client for Ollama API 2. Adapter to convert Ollama responses to ADK's model.LLM interface 3. Support for different local models (llama, mistral, etc.) 4. Streaming support for better performance

Configuration Precedence

The system uses the following precedence for API keys:

  1. LLM_API_KEY (if set, overrides all provider-specific keys)
  2. Provider-specific key (GEMINI_API_KEY, CLAUDE_API_KEY, etc.)
  3. Alternative provider key (GOOGLE_API_KEY for Gemini, ANTHROPIC_API_KEY for Claude)

Error Handling

If you select an unsupported provider, the system will return a clear error message:

Error: claude support via ADK is not yet implemented - use gemini for now
Error: openai support via ADK is not yet implemented - use gemini for now
Error: ollama support via ADK is not yet implemented - use gemini for now

Contributing

To add support for a new LLM provider:

  1. Update pkg/llm/factory.go:
  2. Add a new case in CreateModel()

  3. Implement create<Provider>Model() method

  4. Update pkg/config/config.go:

  5. Add provider-specific configuration fields
  6. Update LoadConfig() to read new environment variables

  7. Add default model in getDefaultModel()

  8. Update documentation:

  9. Add provider to README.md
  10. Update this LLM_CONFIGURATION.md

  11. Update .env.example

  12. Test thoroughly with the new provider

See Also