Module: Legion::LLM::Pipeline::Steps::ToolCalls

Includes:
Legion::Logging::Helper
Included in:
Executor
Defined in:
lib/legion/llm/pipeline/steps/tool_calls.rb

Constant Summary collapse

MAX_TOOL_LOOPS = 
10

Instance Method Summary collapse

Instance Method Details

#step_tool_calls ⇒ Object

rubocop:disable Metrics/MethodLength, Metrics/BlockLength



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# File 'lib/legion/llm/pipeline/steps/tool_calls.rb', line 15

def step_tool_calls
  return unless @raw_response.respond_to?(:tool_calls) && @raw_response.tool_calls&.any?

  tool_calls = @raw_response.tool_calls
  log.info(
    "[llm][tools] detected request_id=#{@request.id} " \
    "conversation_id=#{@request.conversation_id || 'none'} count=#{tool_calls.size}"
  )
  tool_calls.each do |tc|
    tool_name = tc[:name] || tc['name']
    tool_call_id = tc[:id] || tc['id']
    source = find_tool_source(tool_name)
    next unless source

    # Skip builtin tools - RubyLLM handles those
    if source[:type] == :builtin
      log.info(
        "[llm][tools] builtin_passthrough request_id=#{@request.id} " \
        "tool_call_id=#{tool_call_id || 'none'} name=#{tool_name}"
      )
      next
    end

    log.info(
      "[llm][tools] dispatch request_id=#{@request.id} " \
      "tool_call_id=#{tool_call_id || 'none'} name=#{tool_name} " \
      "source=#{describe_tool_source(source)} " \
      "arguments=#{summarize_tool_arguments(tc[:arguments] || tc['arguments'])}"
    )

    tool_exchange_id = Tracing.exchange_id
    result = ToolDispatcher.dispatch(
      tool_call:   tc,
      source:      source,
      exchange_id: tool_exchange_id
    )

    @timeline.record(
      category: :tool, key: "tool:execute:#{tc[:name] || tc['name']}",
      exchange_id: tool_exchange_id, direction: :outbound,
      detail: "#{result[:status]} via #{source[:type]}",
      from: 'pipeline', to: "tool:#{tc[:name] || tc['name']}",
      duration_ms: result[:duration_ms],
      data: {
        tool_call_id: tool_call_id,
        arguments:    tc[:arguments] || tc['arguments'] || {},
        source:       describe_tool_source(source),
        status:       result[:status]
      }
    )

    @timeline.record(
      category: :tool, key: "tool:result:#{tc[:name] || tc['name']}",
      exchange_id: tool_exchange_id, direction: :inbound,
      detail: result[:result].to_s[0..100].to_s,
      from: "tool:#{tc[:name] || tc['name']}", to: 'pipeline',
      data: {
        tool_call_id: tool_call_id,
        status:       result[:status],
        result:       result[:result]
      }
    )

    log.info(
      "[llm][tools] result request_id=#{@request.id} " \
      "tool_call_id=#{tool_call_id || 'none'} name=#{tool_name} " \
      "status=#{result[:status]} duration_ms=#{result[:duration_ms]} " \
      "preview=#{summarize_tool_result(result[:result])}"
    )
  end
rescue StandardError => e
  @warnings << "Tool call handling error: #{e.message}"
  handle_exception(e, level: :warn, operation: 'llm.pipeline.steps.tool_calls')
end