Class: RCrewAI::LegacyReactRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/rcrewai/legacy_react_runner.rb

Overview

Behavior-preserving extraction of the prompt-parsed USE_TOOL[] / FINAL_ANSWER[] loop that lived in Agent. Used as a fallback when an agent's tools have no DSL schemas declared OR the configured LLM does not support native function calling.

Constant Summary collapse

DEFAULT_MAX_ITERATIONS = 
10

Instance Method Summary collapse

Constructor Details

#initialize(agent:, llm:, tools:, max_iterations: DEFAULT_MAX_ITERATIONS, event_sink: nil) ⇒ LegacyReactRunner

Returns a new instance of LegacyReactRunner.



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# File 'lib/rcrewai/legacy_react_runner.rb', line 13

def initialize(agent:, llm:, tools:, max_iterations: DEFAULT_MAX_ITERATIONS, event_sink: nil)
  @agent = agent
  @llm = llm
  @tools = tools
  @max_iterations = max_iterations
  @sink = event_sink || ->(_) {}
end

Instance Method Details

#run(messages:) ⇒ Object 



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

def run(messages:)
  msgs = messages.dup
  history = []
  iter = 0
  total_usage = { prompt_tokens: 0, completion_tokens: 0, total_tokens: 0 }
  last_reasoning = nil
  last_action_result = nil

  while iter < @max_iterations
    iter += 1
    emit(Events::IterationStart, iteration: iter, iteration_index: iter)

    response = @llm.chat(messages: fit_context(msgs))
    accumulate_usage(total_usage, response[:usage])
    reasoning = response[:content] || ''
    last_reasoning = reasoning

    action_result, iteration_history = parse_and_execute_actions(reasoning, iter)
    history.concat(iteration_history)
    last_action_result = action_result

    msgs << { role: 'assistant', content: reasoning }
    msgs << { role: 'user', content: action_result } if action_result && !action_result.empty?

    finish_reason = response[:finish_reason]
    emit(Events::IterationEnd, iteration: iter, finish_reason: finish_reason)

    next unless task_complete?(reasoning, action_result) || finish_reason == :stop

    final = extract_final_result(reasoning, action_result)
    return finalize(content: final, history: history, iter: iter,
                    finish_reason: finish_reason || :stop, usage: total_usage)
  end

  final = extract_final_result(last_reasoning || '', last_action_result) ||
          'Task execution reached limits without clear completion'
  finalize(content: final, history: history, iter: iter,
           finish_reason: :max_iterations, usage: total_usage)
end