Class: Prescient::Provider::Anthropic

Inherits:
Base
  • Object
show all
Includes:
HTTParty
Defined in:
lib/prescient/provider/anthropic.rb

Overview

Anthropic Messages API provider adapter.

Instance Attribute Summary

Attributes inherited from Base

#options, #provider_name

Instance Method Summary collapse

Methods inherited from Base

#available?, #build_prompt, #clean_text, #default_context_configs, #default_prompt_templates, #extract_embedding_text, #extract_text_values, #format_context_item, #handle_errors, #validate_embedding_dimensions

Constructor Details

#initialize(**options) ⇒ Anthropic

Returns a new instance of Anthropic.



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

def initialize(**options)
  super
  self.class.default_timeout(@options[:timeout] || 60)
end

Instance Method Details

#generate_embedding(_text, **_options) ⇒ Object

Anthropic does not provide embeddings through this adapter.

Raises:



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# File 'lib/prescient/provider/anthropic.rb', line 21

def generate_embedding(_text, **_options)
  # Anthropic doesn't provide embedding API, raise error
  raise Prescient::Error,
        "Anthropic provider does not support embeddings. Use OpenAI or HuggingFace for embeddings."
end

#generate_response(prompt, context_items = [], **options) ⇒ Hash

Generate a response using Anthropic's Messages API.

Parameters:

  • prompt (String) —

    Prompt to send

  • context_items (Array<Hash, String>) (defaults to: []) —

    Optional context items

Returns:

  • (Hash) —

    Normalized response data



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# File 'lib/prescient/provider/anthropic.rb', line 31

def generate_response(prompt, context_items = [], **options)
  handle_errors do
    formatted_prompt = build_prompt(prompt, context_items)

    response = self.class.post("/v1/messages",
                               headers: {
                                 "Content-Type" => "application/json",
                                 "x-api-key" => @options[:api_key],
                                 "anthropic-version" => "2023-06-01"
                               },
                               body: {
                                 model: options[:model] || @options[:model],
                                 max_tokens: options[:max_tokens] || 2000,
                                 temperature: options[:temperature] || 0.7,
                                 messages: [
                                   {
                                     role: "user",
                                     content: formatted_prompt
                                   }
                                 ]
                               }.to_json)

    validate_response!(response, "text generation")

    content = response.parsed_response.dig("content", 0, "text")
    raise Prescient::InvalidResponseError, "No response generated" unless content

    {
      response: content.strip,
      model: options[:model] || @options[:model],
      provider: "anthropic",
      processing_time: nil,
      metadata: {
        usage: response.parsed_response["usage"]
      }
    }
  end
end

#health_check ⇒ Hash

Check Anthropic API availability using the non-generating /v1/models endpoint.

reachable indicates the API answered successfully. ready indicates that the configured model appears in the returned model list.

Returns:

  • (Hash) —

    Provider health information



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# File 'lib/prescient/provider/anthropic.rb', line 76

def health_check
  handle_errors do
    response = self.class.get("/v1/models", headers: api_headers)

    if response.success?
      models = response.parsed_response["data"] || []
      model_available = models.any? { |model| model["id"] == @options[:model] }
      {
        status: "healthy",
        provider: "anthropic",
        reachable: true,
        models_available: models.map { |model| model["id"] },
        model: { name: @options[:model], available: model_available },
        ready: model_available
      }
    else
      {
        status: "unhealthy", provider: "anthropic", reachable: true,
        error: "HTTP #{response.code}", message: response.message, ready: false
      }
    end
  end
rescue Prescient::Error => e
  {
    status: "unavailable",
    provider: "anthropic",
    reachable: false,
    error: e.class.name,
    message: e.message,
    ready: false
  }
end

#list_models ⇒ Array<Hash>

Return models available to the configured Anthropic account.

Returns:

  • (Array<Hash>) —

    Model descriptors



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# File 'lib/prescient/provider/anthropic.rb', line 111

def list_models
  handle_errors do
    response = self.class.get("/v1/models", headers: api_headers)
    validate_response!(response, "model listing")

    (response.parsed_response["data"] || []).map do |model|
      {
        name: model["id"],
        type: "text",
        display_name: model["display_name"],
        created_at: model["created_at"],
        max_input_tokens: model["max_input_tokens"],
        max_tokens: model["max_tokens"]
      }.compact
    end
  end
end

#validate_configuration! ⇒ Object (protected)

Raises:



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# File 'lib/prescient/provider/anthropic.rb', line 131

def validate_configuration!
  required_options = %i[api_key model]
  missing_options = required_options.select { |opt| @options[opt].nil? }

  return unless missing_options.any?

  raise Prescient::Error, "Missing required options: #{missing_options.join(", ")}"
end