Class: Brute::Completion::LLMrb

Inherits:
Object
  • Object
show all
Includes:
Hooks
Defined in:
lib/brute/completion/llmrb.rb

Overview

Completion backed by the llm.rb gem (https://github.com/llmrb/llm.rb).

Brute.agent
.use(Brute::Middleware::SystemPrompt)
.run(Brute::Completion::LLMrb.new(
  provider:         :openai,
  provider_options: { key: ENV["OPENAI_API_KEY"] },
  model:            "gpt-4o-mini",
))

# or hand over a provider llm.rb has already built:
run Brute::Completion::LLMrb.new(client: LLM.ollama(key: nil), model: "llama3.2:latest")

client:           an LLM::Provider instance (takes precedence)
provider:         llm.rb constructor name (:openai, :anthropic,
                :ollama, ...); falls back to env[:provider]
provider_options: kwargs for that constructor, e.g. { key: "..." }
model:            model id (falls back to env[:model])
tools:            tools list, any shape Tools::Adapter accepts
temperature:      sampling temperature (default 0.7)

Constant Summary collapse

DEFAULT_TEMPERATURE = 
0.7

Constants included from Hooks

Hooks::COMPACT_DURATION_EVENT, Hooks::COMPACT_END_EVENT, Hooks::COMPACT_FAILURE_EVENT, Hooks::COMPACT_START_EVENT, Hooks::CONTENT_EVENT, Hooks::FARADAY_ERROR_EVENT, Hooks::LLM_DURATION_EVENT, Hooks::LLM_END_EVENT, Hooks::LLM_FAILURE_EVENT, Hooks::LLM_START_EVENT, Hooks::MIDDLEWARE_ADDED_EVENT, Hooks::MIDDLEWARE_DURATION_EVENT, Hooks::MIDDLEWARE_END_EVENT, Hooks::MIDDLEWARE_FAILURE_EVENT, Hooks::MIDDLEWARE_START_EVENT, Hooks::OPEN_ROUTER_SERVER_ERROR_EVENT, Hooks::REASONING_EVENT, Hooks::STANDARD_ERROR_EVENT, Hooks::TOOL_APPROVE_EVENT, Hooks::TOOL_CALLS_EVENT, Hooks::TOOL_DURATION_EVENT, Hooks::TOOL_END_EVENT, Hooks::TOOL_FAILURE_EVENT, Hooks::TOOL_START_EVENT, Hooks::TURN_DURATION_EVENT, Hooks::TURN_END_EVENT, Hooks::TURN_FAILURE_EVENT, Hooks::TURN_START_EVENT

Instance Method Summary collapse

Constructor Details

#initialize(**options) ⇒ LLMrb

Returns a new instance of LLMrb.



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# File 'lib/brute/completion/llmrb.rb', line 34

def initialize(**options)
  # Brute depends on no LLM library: the provider gem is required here,
  # at point of use, and only for this completion.
  begin
    require "llm"
  rescue LoadError
    raise LoadError, "#{self.class} needs the 'llm.rb' gem — add `gem \"llm.rb\"` to your Gemfile."
  end

  @options = options
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/brute/completion/llmrb.rb', line 46

def call(env)
  env.emit_trace do |env|
    env.emit(LLM_START_EVENT)

    # llm.rb takes the last message as the prompt and the rest as history.
    messages = Brute::MessageTransport::LLM.dump_all(env[:messages])
    prompt = messages.pop

    response = nil
    env.emit(LLM_DURATION_EVENT) { response = client(env).complete(prompt, **params(env, messages)) }

    if (usage = Brute::MessageTransport::LLM.usage_metrics(response))
      (env[:metadata] ||= {})[:last_llm_usage] = usage
    end

    Brute::MessageTransport::LLM.wrap_each(response) do |message|
      env[:messages] << message
    end

    env.emit(LLM_END_EVENT)
  rescue => error
    env.emit(LLM_FAILURE_EVENT)

    if defined?(::Faraday::Error) && error.is_a?(::Faraday::Error)
      env.emit(FARADAY_ERROR_EVENT, error)
    else
      env.emit(STANDARD_ERROR_EVENT, error)
    end

  end
  env
end