Class: RailsAgents::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_agents/runner.rb

Constant Summary collapse

DEFAULT_TURNS = 
12

Instance Method Summary collapse

Constructor Details

#initialize(agent_class, input:, context: {}, callbacks: {}, parse_json: false, provider: nil, model: nil) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/rails_agents/runner.rb', line 7

def initialize(agent_class, input:, context: {}, callbacks: {}, parse_json: false, provider: nil, model: nil)
  @agent = agent_class
  @input = input
  @context = context
  @callbacks = callbacks
  @parse_json = parse_json
  @skills = agent_class.skill_set
  @tools = agent_class.tool_set
  @provider = provider || agent_class.provider_client
  @model_override = model
  @server_tool_names = @skills.server_tool_names
  @save_files_to = context[:save_files_to]
  @messages = []
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/rails_agents/runner.rb', line 22

def call
  emit(:start, agent: @agent.name, input: @input, context: @context)

  @messages << Message.system(@agent.render_instructions(@context))
  @messages << Message.user(format_input(@input))

  turns = 0
  total_usage = Usage.new(0, 0)
  last_response = nil

  loop do
    turns += 1
    raise Error, "Turn limit reached" if turns > @agent.max_turns

    emit(:turn_start, turn: turns)

    response = @provider.chat(
      messages: @messages,
      client_tools: @tools.definitions,
      skills: @skills,
      model: @model_override || @agent.resolved_model
    )
    last_response = response

    total_usage = Usage.new(
      total_usage.input_tokens + response.usage.input_tokens,
      total_usage.output_tokens + response.usage.output_tokens
    )

    emit(:turn_complete, turn: turns, usage: response.usage, tool_calls: response.tool_calls.map(&:name))

    client_tool_calls = response.tool_calls.reject { |tool_call| @server_tool_names.include?(tool_call.name) }

    if client_tool_calls.any?
      @messages << Message.assistant(
        response.content,
        tool_calls: client_tool_calls,
        raw_content: response.assistant_raw_content
      )
      client_tool_calls.each do |tool_call|
        emit(:tool_start, name: tool_call.name, arguments: tool_call.arguments)
        result = @tools.execute(tool_call.name, tool_call.arguments)
        emit(:tool_finish, name: tool_call.name, result: result)
        @messages << Message.tool(result.to_json, tool_call_id: tool_call.id)
      end
      next
    end

    files = download_files(response.file_ids)
    data = parse_structured_output(response.content)
    result = Result.ok(
      output: response.content,
      data: data,
      files: files,
      messages: @messages,
      usage: total_usage,
      content_blocks: response.content_blocks
    )
    emit(:finish, result: result)
    return result
  end
rescue StandardError => e
  result = Result.fail(error: e.message, messages: @messages, usage: Usage.new(0, 0))
  emit(:error, error: e.message, result: result)
  result
end