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 11

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 19

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 29

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 74

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 109

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 129

def validate_configuration!
  required_options = [: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