Class: RCrewAI::ToolRunner

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

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) ⇒ ToolRunner

Returns a new instance of ToolRunner.



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# File 'lib/rcrewai/tool_runner.rb', line 10

def initialize(agent:, llm:, tools:, max_iterations: DEFAULT_MAX_ITERATIONS, event_sink: nil)
  @agent = agent
  @llm = llm
  @tools = tools
  @tools_by_name = tools.each_with_object({}) { |t, h| h[t.name] = t }
  @max_iterations = max_iterations
  @sink = event_sink || ->(_) {}
end

Instance Method Details

#run(messages:) ⇒ Object

rubocop:disable Metrics/AbcSize



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

def run(messages:) # rubocop:disable Metrics/AbcSize
  msgs = messages.dup
  history = []
  iter = 0
  total_usage = { prompt_tokens: 0, completion_tokens: 0, total_tokens: 0 }

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

    response = @llm.chat(
      messages: fit_context(msgs),
      tools: @tools.map(&:json_schema),
      stream: ->(e) { @sink.call(retag(e, iter)) }
    )
    accumulate_usage(total_usage, response[:usage])

    if response[:tool_calls].nil? || response[:tool_calls].empty?
      emit(Events::IterationEnd, iteration: iter, finish_reason: response[:finish_reason])
      return finalize(content: response[:content], history: history, iter: iter,
                      finish_reason: response[:finish_reason], usage: total_usage)
    end

    msgs << { role: 'assistant', content: response[:content], tool_calls: response[:tool_calls] }

    response[:tool_calls].each do |tc|
      tool = @tools_by_name[tc[:name]]
      emit(Events::ToolCallStart, iteration: iter,
                                  tool: tc[:name], args: tc[:arguments], call_id: tc[:id])

      if tool.nil?
        err = "tool not found: #{tc[:name]}"
        emit(Events::ToolCallError, iteration: iter,
                                    tool: tc[:name], call_id: tc[:id], error: err)
        msgs << tool_result_message(tc[:id], "ERROR: #{err}")
        next
      end

      started = monotonic_ms
      begin
        result = tool.execute_with_validation(tc[:arguments] || {})
        duration = monotonic_ms - started
        @agent.memory.add_tool_usage(tc[:name], tc[:arguments], result) if @agent.respond_to?(:memory) && @agent.memory
        emit(Events::ToolCallResult, iteration: iter,
                                     tool: tc[:name], call_id: tc[:id], result: result,
                                     duration_ms: duration)
        history << { tool: tc[:name], args: tc[:arguments], result: result, duration_ms: duration }
        msgs << tool_result_message(tc[:id], result.to_s)
      rescue StandardError => e
        emit(Events::ToolCallError, iteration: iter,
                                    tool: tc[:name], call_id: tc[:id], error: e.message)
        msgs << tool_result_message(tc[:id], "ERROR: #{e.message}")
      end
    end

    emit(Events::IterationEnd, iteration: iter, finish_reason: :tool_calls)
  end

  finalize(content: nil, history: history, iter: iter,
           finish_reason: :max_iterations, usage: total_usage)
end