Class: Rach::Provider::Anthropic

Inherits:
Base
  • Object
show all
Defined in:
lib/rach/provider/anthropic.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

key

Constructor Details

#initialize(access_token: nil, logger: nil, **kwargs) ⇒ Anthropic

Returns a new instance of Anthropic.



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# File 'lib/rach/provider/anthropic.rb', line 8

def initialize(access_token: nil, logger: nil, **kwargs)
  @client = create_client(access_token, **kwargs)
  @logger = logger
end

Class Method Details

.supports?(model) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rach/provider/anthropic.rb', line 80

def self.supports?(model)
  model.start_with?("claude")
end

Instance Method Details

#chat(**parameters) ⇒ Object 



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# File 'lib/rach/provider/anthropic.rb', line 13

def chat(**parameters)
  # Extract system message if present
  messages = parameters.dig(:parameters, :messages) || []
  system_message = messages.find { |msg| msg[:role] == "system" }

  # Remove system message from messages array if present
  messages = messages.reject { |msg| msg[:role] == "system" } if system_message

  # Convert messages to Anthropic format
  messages = messages.map do |msg|
    {
      role: msg[:role] == "assistant" ? "assistant" : "user",
      content: msg[:content]
    }
  end

  temperature = (parameters.dig(:parameters, :temperature) || 1).clamp(0, 1)
  max_tokens = parameters.dig(:parameters, :max_tokens) || 1024
  tools = convert_tools(parameters.dig(:parameters, :tools))

  anthropic_params = {
    model: parameters.dig(:parameters, :model),
    messages:,
    temperature:,
    max_tokens:,
    tools:,
    tool_choice: convert_tool_choice(tools),
    system: system_message&.[](:content)
  }.compact

  if @logger
    @logger.info("Making API call to Anthropic")
    @logger.info("Request parameters: #{anthropic_params.inspect}")
  end

  raw_response = @client.messages(
    parameters: anthropic_params.compact
    # parameters: {
    #   model: anthropic_params[:model],
    #   messages: anthropic_params[:messages],
    #   system: anthropic_params[:system],
    #   temperature: anthropic_params[:temperature],
    #   max_tokens: anthropic_params[:max_tokens],
    #   tools: anthropic_params[:tools],
    #   tool_choice: anthropic_params[:tool_choice],
    # }.compact
  )

  if @logger
    @logger.info("Request to Anthropic: #{JSON.pretty_generate(anthropic_params)}")
    @logger.info("Response: #{JSON.pretty_generate(raw_response)}")
  end

  Response.new(
    id: raw_response["id"],
    model: raw_response["model"],
    content: raw_response.dig("content", 0, "text"),
    tool_calls: convert_tool_calls(raw_response["content"]),
    usage: {
      "prompt_tokens" => raw_response["usage"]["input_tokens"],
      "completion_tokens" => raw_response["usage"]["output_tokens"],
      "total_tokens" => raw_response["usage"]["input_tokens"] + raw_response["usage"]["output_tokens"]
    },
    raw_response: raw_response
  )
end