Class: DSPy::ReAct

Inherits:
Predict show all
Extended by:
T::Sig
Includes:
Mixins::InstrumentationHelpers, Mixins::StructBuilder
Defined in:
lib/dspy/re_act.rb

Overview

ReAct Agent using Sorbet signatures

Constant Summary collapse

FINISH_ACTION = 
"finish"

Instance Attribute Summary collapse

Attributes inherited from Predict

#prompt, #signature_class

Instance Method Summary collapse

Methods inherited from Predict

#add_examples, #forward_untyped, #system_signature, #user_signature, #with_examples, #with_instruction, #with_prompt

Methods inherited from Module

#call, #call_untyped, #forward_untyped, #lm

Constructor Details

#initialize(signature_class, tools: [], max_iterations: 5) ⇒ ReAct

Returns a new instance of ReAct.



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# File 'lib/dspy/re_act.rb', line 105

def initialize(signature_class, tools: [], max_iterations: 5)
  @original_signature_class = signature_class
  @tools = T.let({}, T::Hash[String, T.untyped])
  tools.each { |tool| @tools[tool.name.downcase] = tool }
  @max_iterations = max_iterations

  # Create thought generator using Predict to preserve field descriptions
  @thought_generator = T.let(DSPy::Predict.new(Thought), DSPy::Predict)

  # Create observation processor using Predict to preserve field descriptions
  @observation_processor = T.let(DSPy::Predict.new(ReActObservation), DSPy::Predict)

  # Create enhanced output struct with ReAct fields
  @enhanced_output_struct = create_enhanced_output_struct(signature_class)
  enhanced_output_struct = @enhanced_output_struct

  # Create enhanced signature class
  enhanced_signature = Class.new(DSPy::Signature) do
    # Set the description
    description signature_class.description

    # Use the same input struct
    @input_struct_class = signature_class.input_struct_class

    # Use the enhanced output struct with ReAct fields
    @output_struct_class = enhanced_output_struct

    class << self
      attr_reader :input_struct_class, :output_struct_class
    end
  end

  # Call parent constructor with enhanced signature
  super(enhanced_signature)
end

Instance Attribute Details

#enhanced_output_struct ⇒ Object (readonly)

Returns the value of attribute enhanced_output_struct.



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# File 'lib/dspy/re_act.rb', line 95

def enhanced_output_struct
  @enhanced_output_struct
end

#max_iterations ⇒ Object (readonly)

Returns the value of attribute max_iterations.



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# File 'lib/dspy/re_act.rb', line 101

def max_iterations
  @max_iterations
end

#original_signature_class ⇒ Object (readonly)

Returns the value of attribute original_signature_class.



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# File 'lib/dspy/re_act.rb', line 92

def original_signature_class
  @original_signature_class
end

#tools ⇒ Object (readonly)

Returns the value of attribute tools.



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# File 'lib/dspy/re_act.rb', line 98

def tools
  @tools
end

Instance Method Details

#forward(**kwargs) ⇒ Object 



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# File 'lib/dspy/re_act.rb', line 142

def forward(**kwargs)
  lm = config.lm || DSPy.config.lm
  available_tools = @tools.keys

  # Instrument the entire ReAct agent lifecycle
  result = instrument_prediction('dspy.react', @original_signature_class, kwargs, {
    max_iterations: @max_iterations,
    available_tools: available_tools
  }) do
    # Validate input and extract question
    input_struct = @original_signature_class.input_struct_class.new(**kwargs)
    question = T.cast(input_struct.serialize.values.first, String)

    # Execute ReAct reasoning loop
    reasoning_result = execute_react_reasoning_loop(question)

    # Create enhanced output with all ReAct data
    create_enhanced_result(kwargs, reasoning_result)
  end

  result
end