Class: Kward::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/kward/model/client.rb

Constant Summary collapse

OPENROUTER_URL = 
URI("https://openrouter.ai/api/v1/chat/completions")
OPENROUTER_MODELS_URL = 
URI("https://openrouter.ai/api/v1/models")
CODEX_URL = 
URI("https://chatgpt.com/backend-api/codex/responses")
AUTH_ERROR = 
"No OpenAI OAuth login found. Run `ruby lib/main.rb login`, or set OPENAI_ACCESS_TOKEN/OPENROUTER_API_KEY."
OPENROUTER_AUTH_ERROR = 
"No OpenRouter API key found. Set OPENROUTER_API_KEY or add openrouter_api_key to your Kward config."
COPILOT_AUTH_ERROR = 
"No GitHub Copilot OAuth login found. Run `ruby lib/main.rb login github` or set COPILOT_GITHUB_TOKEN."
DEFAULT_OPENAI_MODEL = 
ModelInfo::DEFAULT_OPENAI_MODEL
DEFAULT_OPENROUTER_MODEL = 
ModelInfo::DEFAULT_OPENROUTER_MODEL
DEFAULT_REASONING_EFFORT = 
ModelInfo::DEFAULT_REASONING_EFFORT
RETRY_DELAYS = 
[1, 2].freeze
NON_RETRYABLE_PROVIDER_LIMIT_PATTERNS = 
[
  /GoUsageLimitError/i,
  /FreeUsageLimitError/i,
  /Monthly usage limit reached/i,
  /available balance/i,
  /insufficient[_ ]quota/i,
  /out of (?:budget|credits?)/i,
  /quota exceeded/i,
  /billing/i,
  /payment required/i,
  /(?:usage|spend|credit|quota).*(?:exceeded|reached|exhausted|depleted)/i,
  /(?:exceeded|reached).*(?:usage|quota|credit|budget|balance)/i
].freeze
RequestError = 
Class.new(StandardError) do
  attr_reader :provider, :code, :body

  def initialize(provider:, code:, body:)
    @provider = provider
    @code = code.to_i
    @body = body.to_s
    super("#{provider} request failed: #{code} #{@body}")
  end

  def context_overflow?
    ContextOverflow.error?(self)
  end

  def transient?
    !context_overflow? && !provider_limit? && (code == 429 || code.between?(500, 599))
  end

  def provider_limit?
    text = [message, body].compact.join("\n")
    Kward::Client::NON_RETRYABLE_PROVIDER_LIMIT_PATTERNS.any? { |pattern| text.match?(pattern) }
  end

  def message_after_attempts(attempts)
    "#{provider} request failed after #{attempts} attempts: #{code} #{body}"
  end
end
TRANSIENT_NETWORK_ERRORS = 
[IOError, EOFError, SystemCallError, Net::OpenTimeout, Net::ReadTimeout].freeze

Instance Method Summary collapse

Constructor Details

#initialize(api_key: , model: nil, openai_access_token: , oauth: OpenAIOAuth.new, github_oauth: GithubOAuth.new, config_path: OpenAIOAuth.default_config_path, telemetry_logger: TelemetryLogger.new(config_path: config_path)) ⇒ Client

Returns a new instance of Client.



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# File 'lib/kward/model/client.rb', line 69

def initialize(api_key: ENV["OPENROUTER_API_KEY"], model: nil, openai_access_token: ENV["OPENAI_ACCESS_TOKEN"], oauth: OpenAIOAuth.new, github_oauth: GithubOAuth.new, config_path: OpenAIOAuth.default_config_path, telemetry_logger: TelemetryLogger.new(config_path: config_path))
  @openrouter_api_key = presence(api_key)
  @openai_access_token = presence(openai_access_token)
  @oauth = oauth
  @github_oauth = github_oauth
  @model = model
  @config_path = File.expand_path(config_path)
  @config = load_config
  @telemetry_logger = telemetry_logger
  @copilot_models = nil
  @openrouter_models = nil
  @openrouter_catalog = nil
end

Instance Method Details

#available_models ⇒ Object 



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# File 'lib/kward/model/client.rb', line 177

def available_models
  provider = current_provider
  openai_model = model_for("Codex")
  openrouter_model = model_for("OpenRouter")
  copilot_model = model_for("Copilot")
  openrouter_choices = openrouter_model_choices
  copilot_choices = copilot_model_choices
  models = ModelInfo::OPENAI_MODEL_CHOICES.map do |id|
    { provider: "Codex", id: id, current: provider == "Codex" && openai_model == id }
  end
  models += openrouter_choices.map do |id|
    { provider: "OpenRouter", id: id, current: provider == "OpenRouter" && openrouter_model == id }
  end
  models += copilot_choices.map do |id|
    { provider: "Copilot", id: id, current: provider == "Copilot" && copilot_model == id }
  end
  models << { provider: "Codex", id: openai_model, current: provider == "Codex" } unless ModelInfo::OPENAI_MODEL_CHOICES.include?(openai_model)
  models << { provider: "OpenRouter", id: openrouter_model, current: provider == "OpenRouter" } unless openrouter_choices.include?(openrouter_model)
  models << { provider: "Copilot", id: copilot_model, current: provider == "Copilot" } unless copilot_choices.include?(copilot_model)
  
  # Sort models by provider, then alphabetically by id
  models.sort_by { |model| [model[:provider], model[:id]] }
end

#chat(messages, tools: [], on_reasoning_delta: nil, on_assistant_delta: nil, on_retry: nil, cancellation: nil, steering: nil, max_tokens: nil, model: nil, reasoning: nil) ⇒ Object 



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# File 'lib/kward/model/client.rb', line 83

def chat(messages, tools: [], on_reasoning_delta: nil, on_assistant_delta: nil, on_retry: nil, cancellation: nil, steering: nil, max_tokens: nil, model: nil, reasoning: nil)
  cancellation&.raise_if_cancelled!
  url, token, provider,  = credentials
  raise auth_error_for(provider) if token.nil? || token.empty?

  current_model = model_for(provider, override_model: model)
  current_model = resolved_copilot_chat_model(current_model) if provider == "Copilot" && model.nil?

  validate_image_support!(provider, current_model, messages)
  request_body = JSON.dump(request_body_payload(provider, messages, tools, max_tokens: max_tokens, model: current_model, reasoning: reasoning))
  with_retries(provider, current_model, request_bytes: request_body.bytesize, on_retry: on_retry, cancellation: cancellation) do
    request_started_at = @telemetry_logger.monotonic_now
    message = nil
    status = "completed"
    error = nil
    begin
    if provider == "Codex"
      message = codex_chat(url, token, , messages, tools, request_body: request_body, on_reasoning_delta: on_reasoning_delta, on_assistant_delta: on_assistant_delta, cancellation: cancellation, max_tokens: max_tokens)
      message = attach_response_metadata(message, provider: provider, model: current_model)
      next message
    end

    if provider == "Copilot"
      message = if copilot_responses_model?(current_model)
                  copilot_responses_chat(token, request_body: request_body, on_assistant_delta: on_assistant_delta, cancellation: cancellation)
                else
                  copilot_chat(url, token, messages, tools, request_body: request_body, on_assistant_delta: on_assistant_delta, cancellation: cancellation)
                end
      message = attach_response_metadata(message, provider: provider, model: current_model)
      next message
    end

    request = Net::HTTP::Post.new(url)
    request["Authorization"] = "Bearer #{token}"
    request["Content-Type"] = "application/json"
    request.body = request_body

    response = Net::HTTP.start(url.hostname, url.port, use_ssl: true) do |http|
      cancellation&.on_cancel { close_http(http) }
      cancellation&.raise_if_cancelled!
      http.request(request)
    end
    cancellation&.raise_if_cancelled!

    unless response.is_a?(Net::HTTPSuccess)
      raise RequestError.new(provider: provider, code: response.code, body: response.body)
    end

    body = JSON.parse(response.body)
    message = body.fetch("choices").first.fetch("message")
    cancellation&.raise_if_cancelled!
    on_assistant_delta&.call(message.fetch("content", ""))
    message = attach_response_metadata(message, provider: provider, model: current_model, usage: normalized_usage(body["usage"]))
    message
    rescue StandardError => e
      status = "failed"
      error = e
      raise e
    ensure
      log_model_request(provider: provider, model: current_model, request_bytes: request_body.bytesize, duration_ms: @telemetry_logger.duration_ms(request_started_at), status: status, error: error, usage: message && (message["usage"] || message[:usage]))
    end
  end
rescue *TRANSIENT_NETWORK_ERRORS => e
  raise Kward::Cancellation::CancelledError, "cancelled" if cancellation&.cancelled?

  log_error("model_request_error", e)
  raise e
rescue StandardError => e
  log_error("model_request_error", e)
  raise e
end

#current_context_parts(messages, tools) ⇒ Object 



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# File 'lib/kward/model/client.rb', line 207

def current_context_parts(messages, tools)
  build_context_parts(current_provider, messages, tools)
end

#current_context_window ⇒ Object 



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# File 'lib/kward/model/client.rb', line 173

def current_context_window
  ModelInfo.context_window(current_provider, current_model)
end

#current_model ⇒ Object 



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# File 'lib/kward/model/client.rb', line 165

def current_model
  model_for(current_provider)
end

#current_provider ⇒ Object 



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# File 'lib/kward/model/client.rb', line 155

def current_provider
  _url, _token, provider = credentials
  provider
rescue StandardError
  label = ModelInfo.provider_label(configured_provider)
  return label unless label.empty?

  openai_configured? ? "Codex" : "OpenRouter"
end

#current_reasoning_effort ⇒ Object 



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# File 'lib/kward/model/client.rb', line 169

def current_reasoning_effort
  reasoning_effort(current_provider)
end

#openrouter_catalog ⇒ Object 



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# File 'lib/kward/model/client.rb', line 201

def openrouter_catalog
  fetch_openrouter_models(full_catalog: true).map do |id|
    { provider: "OpenRouter", id: id, current: current_provider == "OpenRouter" && model_for("OpenRouter") == id }
  end.sort_by { |model| model[:id] }
end

#reload_config ⇒ Object 



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# File 'lib/kward/model/client.rb', line 217

def reload_config
  @config = load_config
  @copilot_models = nil
  @openrouter_models = nil
  @openrouter_catalog = nil
end

#supports_in_flight_steer? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kward/model/client.rb', line 211

def supports_in_flight_steer?
  current_provider == "Codex"
rescue StandardError
  false
end