Configuration

ActiveAgent provides flexible configuration options for both framework-level settings and provider-specific configurations. Configure global behavior like retry strategies and logging, or define multiple AI providers with environment-specific settings.

Global Settings

Configure framework-level behavior using ActiveAgent.configure:

ruby

ActiveAgent.configure do |config|
  # Retry configuration (see Retries documentation for details)
  config.retries = true
  config.retries_count = 3

  # Logging (non-Rails only)
  config.logger = Logger.new(STDOUT)
  config.logger.level = Logger::INFO
end

Reference

Setting	Type	Default	Description
`retries`	Boolean, Proc	`true`	Retry strategy for failed requests
`retries_count`	Integer	`3`	Maximum retry attempts
`retries_on`	Array<Class>	Network errors	Exception classes that trigger retries
`logger`	Logger	`Rails.logger`	Logger instance (Rails auto-configured)

Flow and Precedence

ActiveAgent applies configuration settings in a hierarchical order, where each level can override the previous one. Understanding this flow helps you control exactly how your agents behave at different stages.

Configuration Hierarchy

Settings are applied in the following order, from lowest to highest precedence:

Global Root Settings - Base configuration defined in your YAML file or set on the configuration object
Environment-Specific Settings - Override root settings based on the current environment (development, test, production)
Agent-Level Settings - Configuration provided to generate_with or embed_with in your agent class
Request-Level Settings - Settings passed when calling prompt, embed, or generate_with on an instance
Generation Call - Final settings applied at the moment prompt_now or embed_now is triggered

Each level overrides only the specific settings it defines, leaving others unchanged from previous levels.

Configuration Flow Example

yaml

# config/active_agent.yml
# 1. Global root settings
openai: &openai
  service: "OpenAI"
  access_token: <%= Rails.application.credentials.dig(:openai, :access_token) %>
  model: "gpt-4o"
  temperature: 0.5

# 2. Environment-specific overrides
development:
  openai:
    <<: *openai
    model: "gpt-4o-mini"      # Overrides model for development
    temperature: 0.7           # Overrides temperature for development

ruby

# 3. Agent-level configuration
class MyAgent < ApplicationAgent
  generate_with :openai, temperature: 0.8  # Overrides temperature from YAML
end

# 4. Request-level configuration
agent = MyAgent.with(message: "Hello")
  .prompt_context
  .generate_with(:openai, model: "gpt-4o", max_tokens: 1000)  # Overrides model, adds max_tokens

# 5. Generation triggered
result = agent.prompt_now  # Uses: openai service, gpt-4o model, 0.8 temperature, 1000 max_tokens

Precedence in Action

Given the example above, here's how settings are resolved:

Setting	Root	Environment	Agent Class	Request	Final Value
`service`	`"OpenAI"`	-	-	`"OpenAI"`	`"OpenAI"`
`model`	`"gpt-4o"`	`"gpt-4o-mini"`	-	`"gpt-4o"`	`"gpt-4o"`
`temperature`	`0.5`	`0.7`	`0.8`	-	`0.8`
`max_tokens`	-	-	-	`1000`	`1000`
`access_token`	`"sk-..."`	-	-	-	`"sk-..."`

Practical Applications

Development vs Production Models:

yaml

openai: &openai
  service: "OpenAI"
  access_token: <%= Rails.application.credentials.dig(:openai, :access_token) %>
  model: "gpt-4o"

development:
  openai:
    <<: *openai
    model: "gpt-4o-mini"  # Cheaper for development

production:
  openai:
    <<: *openai
    model: "gpt-4o"  # Full capability for production

Agent-Specific Defaults:

ruby

class CreativeAgent < ApplicationAgent
  generate_with :openai, temperature: 0.9  # High creativity by default
end

class PreciseAgent < ApplicationAgent
  generate_with :openai, temperature: 0.2  # Low temperature for consistency
end

Request-Level Overrides:

ruby

class CreativeAgent < ApplicationAgent
  generate_with :openai, temperature: 0.9  # High creativity by default

  # Low temperature takes effect
  def imagine
    prompt(temperature: 0.3)
  end
end

Key Principles

Explicit overrides implicit - Specifically set values always win over inherited ones
Closer to execution wins - Settings applied closer to prompt_now take precedence
Partial overrides - You only need to specify the settings you want to change
Environment awareness - Environment-specific settings automatically apply without code changes

Providers

YAML Configuration File

The recommended way to configure providers is using a YAML file with environment-specific sections. This approach keeps API keys secure, supports multiple providers, and allows different settings per environment.

Create config/active_agent.yml:

yaml

anthropic: &anthropic
  service: "Anthropic"
  access_token: <%= Rails.application.credentials.dig(:anthropic, :access_token) %>
openai: &openai
  service: "OpenAI"
  access_token: <%= Rails.application.credentials.dig(:openai, :access_token) %>
open_router: &open_router
  service: "OpenRouter"
  access_token: <%= Rails.application.credentials.dig(:open_router, :access_token) || Rails.application.credentials.dig(:open_router, :api_key) %>
ollama: &ollama
  service: "Ollama"
  model: "gemma3:latest"
mock: &mock
  service: "Mock"
  model: "mock-model"

yaml

development:
  openai:
    <<: *openai
    model: "gpt-4o-mini"
  open_router:
    <<: *open_router
    model: "qwen/qwen3-30b-a3b:free"
  ollama:
    <<: *ollama
  anthropic:
    <<: *anthropic
  mock:
    <<: *mock

Key features:

YAML anchors (&openai, *openai) - Reuse common configuration blocks
ERB templates - Access Rails credentials and environment variables
Environment sections - Different settings for development, test, production
Provider-specific settings - Configure API keys, models, temperatures, etc.

Loading Configuration

Load the YAML configuration in your Rails initializer:

ruby

# config/initializers/activeagent.rb
ActiveAgent.configuration_load(Rails.root.join("config/active_agent.yml"))

The Railtie automatically loads config/active_agent.yml if it exists, so you typically don't need to do this manually in Rails applications.

Storing API Keys

Best practice: Store API keys in Rails credentials, not directly in YAML files.

bash

# Edit credentials
rails credentials:edit

# Add provider keys
openai:
  access_token: sk-...

anthropic:
  access_token: sk-ant-...

open_router:
  access_token: sk-or-...

Reference in active_agent.yml:

yaml

openai: &openai
  service: "OpenAI"
  access_token: <%= Rails.application.credentials.dig(:openai, :access_token) %>

Reference

Common settings available across all providers:

Setting	Type	Required	Description
`service`	String	Yes	Provider class name (OpenAI, Anthropic, OpenRouter, Ollama, Mock)
`access_token` / `api_key`	String	Yes*	API authentication key
`model`	String	Yes*	Model identifier for the LLM to use
`temperature`	Float	No	Randomness control (0.0-2.0, default varies by provider)
`max_tokens`	Integer	No	Maximum tokens in response

* Required by most providers. Some providers like Ollama may not require authentication for local instances, and may have default models configured.

Provider-specific settings: Each provider supports additional configuration options beyond these common settings. For complete details on available settings, environment variables, and provider-specific features, see:

Anthropic Provider - Beta headers, base URL, retry configuration, etc.
Ollama Provider - Host configuration for local instances
OpenAI Provider - Organization ID, request timeout, admin token, etc.
OpenRouter Provider - App name, site URL, provider preferences, etc.
Mock Provider - Testing-specific options

Using Configured Providers

Once configured, reference providers by name in your agents:

ruby

class MyAgent < ApplicationAgent
  generate_with :openai  # Uses settings from config/active_agent.yml
end

Multiple Provider Instances

Configure multiple instances of the same provider with different settings:

yaml

development:
  openai_fast:
    service: "OpenAI"
    access_token: <%= Rails.application.credentials.dig(:openai, :access_token) %>
    model: "gpt-4o-mini"
    temperature: 0.7

  openai_precise:
    service: "OpenAI"
    access_token: <%= Rails.application.credentials.dig(:openai, :access_token) %>
    model: "gpt-4o"
    temperature: 0.3

Use in agents:

ruby

class FastAgent < ApplicationAgent
  generate_with :openai_fast
end

class PreciseAgent < ApplicationAgent
  generate_with :openai_precise
end

Retrys

ActiveAgent automatically retries failed requests due to network errors. Configure retry behavior globally or provide custom retry strategies.

Quick configuration:

ruby

# Enable/disable retries
config.retries = true           # Enable automatic retries (default)
config.retries = false          # Disable all retries

# Adjust retry count
config.retries_count = 5        # Maximum retry attempts (default: 3)

# Add custom exception classes
config.retries_on << CustomNetworkError

For advanced retry configuration including exponential backoff, custom strategies, rate limiting, and per-provider settings, see Retries.

Logging

Rails Applications

In Rails, ActiveAgent automatically inherits logging settings from your Rails application:

Logger: Uses Rails.logger by default
Log level: Inherits from Rails.logger.level

Configure in your environment files:

ruby

# config/environments/development.rb
config.log_level = :debug

# config/environments/production.rb
config.log_level = :info

Non-Rails Applications

For standalone Ruby applications, configure logging manually:

ruby

ActiveAgent.configure do |config|
  # Set up logger
  config.logger = Logger.new(STDOUT)
  config.logger.level = Logger::INFO
end

Log levels:

DEBUG - All instrumentation events with full detail
INFO - Important operations (API calls, completions)
WARN - Errors and retries only
ERROR - Only failures
FATAL - Disable instrumentation logging

See Instrumentation for detailed logging and monitoring options.

Retries - Retry strategies, custom retry logic, and error handling
Instrumentation - Logging, monitoring, and event tracking
Rails Integration - Rails-specific configuration and setup
Testing - Test configuration and mock providers
Agents - How agents use configuration in generate_with
Providers - Provider-specific features and behavior

Configuration ​

Global Settings ​

Reference ​

Flow and Precedence ​

Configuration Hierarchy ​

Configuration Flow Example ​

Precedence in Action ​

Practical Applications ​

Key Principles ​

Providers ​

YAML Configuration File ​

Loading Configuration ​

Storing API Keys ​

Reference ​

Using Configured Providers ​

Multiple Provider Instances ​

Retrys ​

Logging ​

Rails Applications ​

Non-Rails Applications ​

Related Documentation ​

Configuration

Global Settings

Reference

Flow and Precedence

Configuration Hierarchy

Configuration Flow Example

Precedence in Action

Practical Applications

Key Principles

Providers

YAML Configuration File

Loading Configuration

Storing API Keys

Reference

Using Configured Providers

Multiple Provider Instances

Retrys

Logging

Rails Applications

Non-Rails Applications

Related Documentation