Module: Legion::LLM::Inference::Steps::ToolCalls

Includes:
Logging, Legion::Logging::Helper
Included in:
Executor
Defined in:
lib/legion/llm/inference/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/inference/steps/tool_calls.rb', line 17

def step_tool_calls
  unless @raw_response.respond_to?(:tool_calls) && @raw_response.tool_calls&.any?
    log_step_debug(:tool_calls, :skipped, reason: :no_tool_calls)
    return
  end

  tool_calls = @raw_response.tool_calls
  log_step_debug(:tool_calls, :start, tool_call_count: tool_calls.size)
  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; native providers handle provider-owned tools.
    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

    tool_exchange_id = Tracing.exchange_id
    log_tool_call_dispatch(tool_call_id, tool_name, source, tc[:arguments] || tc['arguments'])
    result = ToolDispatcher.dispatch(
      tool_call:   tc,
      source:      source,
      exchange_id: tool_exchange_id
    )

    if @pending_tool_history
      lex_normalized = (source[:lex] || '').delete_prefix('lex-').tr('-', '_')
      runner_key     = source[:type] == :extension ? "#{lex_normalized}_#{source[:runner]}" : nil
      result_string  = result[:result].is_a?(String) ? result[:result] : Legion::JSON.dump(result[:result] || {})
      @pending_tool_history << {
        tool_call_id:  tool_call_id,
        pending_index: @pending_tool_history.size,
        tool_name:     tool_name,
        args:          tc[:arguments] || tc['arguments'] || {},
        result:        result_string,
        error:         result[:status] == :error,
        runner_key:    runner_key
      }
    end

    @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_tool_call_result(tool_call_id, tool_name, result)
  end
rescue StandardError => e
  @warnings << "Tool call handling error: #{e.message}"
  handle_exception(e, level: :warn, operation: 'llm.pipeline.steps.tool_calls')
end