Class: RCrewAI::Agent

Inherits:
Object
  • Object
show all
Includes:
AgentAugmentations, HumanInteractionExtensions
Defined in:
lib/rcrewai/agent.rb

Defined Under Namespace

Classes: CLI

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from AgentAugmentations

#fit_context, #reasoning?, #respect_context_window?

Methods included from HumanInteractionExtensions

#confirm_with_human, #get_human_feedback, #request_human_approval, #request_human_choice, #request_human_input, #request_human_review

Constructor Details

#initialize(name:, role:, goal:, backstory: nil, tools: [], **options) ⇒ Agent

Returns a new instance of Agent.



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# File 'lib/rcrewai/agent.rb', line 23

def initialize(name:, role:, goal:, backstory: nil, tools: [], **options)
  @name = name
  @role = role
  @goal = goal
  @backstory = backstory
  @tools = tools
  @verbose = options.fetch(:verbose, false)
  @allow_delegation = options.fetch(:allow_delegation, false)
  @manager = options.fetch(:manager, false) # New manager flag
  @max_iterations = options.fetch(:max_iterations, 10)
  @max_execution_time = options.fetch(:max_execution_time, 300) # 5 minutes
  @human_input_enabled = options.fetch(:human_input, false)
  @require_approval_for_tools = options.fetch(:require_approval_for_tools, false)
  @require_approval_for_final_answer = options.fetch(:require_approval_for_final_answer, false)
  @logger = Logger.new($stdout)
  @logger.level = verbose ? Logger::DEBUG : Logger::INFO
  @reasoning = options.fetch(:reasoning, false)
  @max_reasoning_attempts = options.fetch(:max_reasoning_attempts, 3)
  @respect_context_window = options.fetch(:respect_context_window, false)
  @memory = build_memory(options[:memory])
  @rate_limiter = options[:max_rpm] ? RateLimiter.new(max_rpm: options[:max_rpm]) : nil
  @llm_client = wrap_with_rate_limiter(build_llm_client(options[:llm]))
  @knowledge = build_knowledge(options[:knowledge], options[:knowledge_sources])
  @subordinates = [] # For manager agents
end

Instance Attribute Details

#allow_delegation ⇒ Object

Returns the value of attribute allow_delegation.



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# File 'lib/rcrewai/agent.rb', line 19

def allow_delegation
  @allow_delegation
end

#backstory ⇒ Object (readonly)

Returns the value of attribute backstory.



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# File 'lib/rcrewai/agent.rb', line 18

def backstory
  @backstory
end

#crew_knowledge=(value) ⇒ Object (writeonly)

Set by the crew so agents see shared knowledge in addition to their own.



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# File 'lib/rcrewai/agent.rb', line 21

def crew_knowledge=(value)
  @crew_knowledge = value
end

#goal ⇒ Object (readonly)

Returns the value of attribute goal.



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# File 'lib/rcrewai/agent.rb', line 18

def goal
  @goal
end

#knowledge ⇒ Object (readonly)

Returns the value of attribute knowledge.



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# File 'lib/rcrewai/agent.rb', line 18

def knowledge
  @knowledge
end

#llm_client ⇒ Object (readonly)

Returns the value of attribute llm_client.



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# File 'lib/rcrewai/agent.rb', line 18

def llm_client
  @llm_client
end

#manager ⇒ Object

Returns the value of attribute manager.



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# File 'lib/rcrewai/agent.rb', line 19

def manager
  @manager
end

#max_execution_time ⇒ Object

Returns the value of attribute max_execution_time.



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# File 'lib/rcrewai/agent.rb', line 19

def max_execution_time
  @max_execution_time
end

#max_iterations ⇒ Object

Returns the value of attribute max_iterations.



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# File 'lib/rcrewai/agent.rb', line 19

def max_iterations
  @max_iterations
end

#memory ⇒ Object (readonly)

Returns the value of attribute memory.



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# File 'lib/rcrewai/agent.rb', line 18

def memory
  @memory
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/rcrewai/agent.rb', line 18

def name
  @name
end

#rate_limiter ⇒ Object (readonly)

Returns the value of attribute rate_limiter.



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# File 'lib/rcrewai/agent.rb', line 18

def rate_limiter
  @rate_limiter
end

#role ⇒ Object (readonly)

Returns the value of attribute role.



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# File 'lib/rcrewai/agent.rb', line 18

def role
  @role
end

#subordinates ⇒ Object (readonly)

Returns the value of attribute subordinates.



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# File 'lib/rcrewai/agent.rb', line 140

def subordinates
  @subordinates
end

#tools ⇒ Object (readonly)

Returns the value of attribute tools.



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# File 'lib/rcrewai/agent.rb', line 18

def tools
  @tools
end

#verbose ⇒ Object

Returns the value of attribute verbose.



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# File 'lib/rcrewai/agent.rb', line 19

def verbose
  @verbose
end

Instance Method Details

#add_subordinate(agent) ⇒ Object 



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# File 'lib/rcrewai/agent.rb', line 134

def add_subordinate(agent)
  return unless is_manager?

  @subordinates << agent unless @subordinates.include?(agent)
end

#available_tools_description ⇒ Object 



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# File 'lib/rcrewai/agent.rb', line 89

def available_tools_description
  return 'No tools available.' if tools.empty?

  tools.map do |tool|
    "- #{tool.name}: #{tool.description}"
  end.join("\n")
end

#delegate_task(task, target_agent) ⇒ Object 



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# File 'lib/rcrewai/agent.rb', line 142

def delegate_task(task, target_agent)
  return unless is_manager?
  return unless @subordinates.include?(target_agent) || allow_delegation

  @logger.info "Manager #{name} delegating task '#{task.name}' to #{target_agent.name}"

  # Create delegation context
  delegation_prompt = build_delegation_prompt(task, target_agent)

  # Use LLM to create proper delegation
  response = llm_client.chat(
    messages: [{ role: 'user', content: delegation_prompt }],
    temperature: 0.2,
    max_tokens: 1000
  )

  delegation_instructions = response[:content]
  @logger.debug "Delegation instructions: #{delegation_instructions}"

  # Execute delegated task
  target_agent.execute_delegated_task(task, delegation_instructions, self)
end

#disable_human_input ⇒ Object 



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# File 'lib/rcrewai/agent.rb', line 198

def disable_human_input
  @human_input_enabled = false
  @require_approval_for_tools = false
  @require_approval_for_final_answer = false
  @logger.info "Human input disabled for agent #{name}"
end

#enable_human_input(**options) ⇒ Object

Human input methods (public)



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# File 'lib/rcrewai/agent.rb', line 191

def enable_human_input(**options)
  @human_input_enabled = true
  @require_approval_for_tools = options.fetch(:require_approval_for_tools, false)
  @require_approval_for_final_answer = options.fetch(:require_approval_for_final_answer, false)
  @logger.info "Human input enabled for agent #{name}"
end

#execute_delegated_task(task, delegation_instructions, manager_agent) ⇒ Object 



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# File 'lib/rcrewai/agent.rb', line 165

def execute_delegated_task(task, delegation_instructions, manager_agent)
  @logger.info "Receiving delegation from manager #{manager_agent.name}"
  @logger.debug "Delegation instructions: #{delegation_instructions}"

  # Store delegation context in task
  original_description = task.description
  enhanced_description = "#{original_description}\n\nDelegation Instructions from #{manager_agent.name}:\n#{delegation_instructions}"

  # Temporarily modify task
  task.instance_variable_set(:@description, enhanced_description)
  task.instance_variable_set(:@manager, manager_agent)

  begin
    result = execute_task(task)

    # Report back to manager
    report_to_manager(task, result, manager_agent)

    result
  ensure
    # Restore original task description
    task.instance_variable_set(:@description, original_description)
  end
end

#execute_task(task, stream: nil, **opts) ⇒ Object 



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# File 'lib/rcrewai/agent.rb', line 49

def execute_task(task, stream: nil, **opts)
  @logger.info "Agent #{name} starting task: #{task.name}"
  start_time = Time.now

  begin
    initial_messages = build_initial_messages(task)
    sink = stream || ->(_) {}

    reasoning = reasoning? ? run_reasoning_pass(task) : nil
    initial_messages = inject_reasoning(initial_messages, reasoning) if reasoning

    runner_class = pick_runner_class
    @logger.info "[rcrewai] agent=#{name} runner=#{runner_class.name.split('::').last}"

    runner = runner_class.new(
      agent: self, llm: @llm_client, tools: @tools,
      max_iterations: opts.fetch(:max_iterations, max_iterations),
      event_sink: sink
    )

    runner_result = runner.run(messages: initial_messages)
    execution_time = Time.now - start_time
    @logger.info "Task completed in #{execution_time.round(2)}s"

    result_string = runner_result[:content].to_s
    memory.add_execution(task, result_string, execution_time)
    task.result = result_string

    build_task_result(task, runner_result, reasoning: reasoning)
  rescue StandardError => e
    @logger.error "Task execution failed: #{e.message}"
    task.result = "Task failed: #{e.message}"
    raise AgentError, "Agent #{name} failed to execute task: #{e.message}"
  end
end

#human_input_enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rcrewai/agent.rb', line 205

def human_input_enabled?
  @human_input_enabled
end

#is_manager? ⇒ Boolean

Manager-specific methods

Returns:

  • (Boolean) 


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# File 'lib/rcrewai/agent.rb', line 130

def is_manager?
  @manager
end

#require_approval_for_tools? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rcrewai/agent.rb', line 85

def require_approval_for_tools?
  @require_approval_for_tools && @human_input_enabled
end

#use_tool(tool_name, **params) ⇒ Object

Raises:



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# File 'lib/rcrewai/agent.rb', line 97

def use_tool(tool_name, **params)
  tool = tools.find { |t| t.name == tool_name || t.class.name.split('::').last.downcase == tool_name.downcase }
  raise ToolNotFoundError, "Tool '#{tool_name}' not found" unless tool

  # Request human approval for tool usage if required
  if @require_approval_for_tools && @human_input_enabled
    approval_result = request_tool_approval(tool_name, params)
    unless approval_result[:approved]
      @logger.info "Tool usage rejected by human: #{tool_name}"
      return "Tool usage was rejected by human reviewer: #{approval_result[:reason]}"
    end
  end

  @logger.debug "Using tool: #{tool_name} with params: #{params}"

  begin
    result = tool.execute(**params)

    # Store tool usage in memory
    memory.add_tool_usage(tool_name, params, result)

    result
  rescue StandardError => e
    @logger.error "Tool execution failed: #{e.message}"

    # Offer human intervention if tool fails and human input is enabled
    raise e unless @human_input_enabled

    handle_tool_failure(tool_name, params, e)
  end
end