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Class: Kward::Client

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

Overview

Provider-facing model client used by CLI, RPC, compaction, and memory flows.

Client owns runtime provider selection, credential lookup, retry telemetry, and HTTP requests for the supported model backends. Provider-neutral payload construction and stream parsing live in ModelPayloads and ModelStreamParser; keep new provider mechanics there when they are reusable, and keep product policy such as configured provider/model selection here.

Constant Summary collapse

OPENROUTER_URL = 
URI("https://openrouter.ai/api/v1/chat/completions")
CODEX_URL = 
URI("https://chatgpt.com/backend-api/codex/responses")
ANTHROPIC_URL = 
URI("https://api.anthropic.com/v1/messages")
LOCAL_BASE_URLS = 
{
  "ollama" => "http://127.0.0.1:11434/v1",
  "lm_studio" => "http://127.0.0.1:1234/v1",
  "llama_cpp" => "http://127.0.0.1:8080/v1"
}.freeze
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."
ANTHROPIC_AUTH_ERROR = 
"No Anthropic OAuth login found. Run `ruby lib/main.rb login anthropic`."
DEFAULT_OPENAI_MODEL = 
ModelInfo::DEFAULT_OPENAI_MODEL
DEFAULT_REASONING_EFFORT = 
ModelInfo::DEFAULT_REASONING_EFFORT
RETRY_DELAYS = 
[1, 2].freeze
DEFAULT_STREAM_IDLE_TIMEOUT_SECONDS = 
120
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

  # Creates an object for model provider requests.
  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, anthropic_oauth: AnthropicOAuth.new, config_path: OpenAIOAuth.default_config_path, telemetry_logger: TelemetryLogger.new(config_path: config_path)) ⇒ Client

Creates an object for model provider requests.



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# File 'lib/kward/model/client.rb', line 90

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

Instance Method Details

#available_models ⇒ Object

Returns model choices suitable for settings UIs.

Only providers with configured credentials are listed. The active provider may use live catalog data. Inactive logged-in providers use static supported choices plus their configured model so listing models does not perform avoidable network calls for every configured credential.



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

def available_models
  provider = current_provider
  models = []

  if provider_logged_in?("Codex")
    openai_model = model_for("Codex")
    models += ModelInfo::OPENAI_MODEL_CHOICES.map do |id|
      model_entry("Codex", id, current: provider == "Codex" && openai_model == id)
    end
    models << model_entry("Codex", openai_model, current: provider == "Codex") unless ModelInfo::OPENAI_MODEL_CHOICES.include?(openai_model)
  end

  if provider_logged_in?("OpenRouter")
    openrouter_model = model_for("OpenRouter")
    openrouter_choices = openrouter_model_choices
    models += openrouter_choices.map do |id|
      model_entry("OpenRouter", id, current: provider == "OpenRouter" && openrouter_model == id)
    end
  end

  if provider_logged_in?("Copilot")
    copilot_model = model_for("Copilot")
    copilot_choices = provider == "Copilot" ? copilot_model_choices : static_copilot_model_choices
    models += copilot_choices.map do |id|
      model_entry("Copilot", id, current: provider == "Copilot" && copilot_model == id)
    end
    models << model_entry("Copilot", copilot_model, current: provider == "Copilot") unless copilot_choices.include?(copilot_model)
  end

  if provider_logged_in?("Anthropic")
    anthropic_model = model_for("Anthropic")
    models += ModelInfo::ANTHROPIC_MODEL_CHOICES.map do |id|
      model_entry("Anthropic", id, current: provider == "Anthropic" && anthropic_model == id)
    end
    models << model_entry("Anthropic", anthropic_model, current: provider == "Anthropic") unless ModelInfo::ANTHROPIC_MODEL_CHOICES.include?(anthropic_model)
  end

  if provider_logged_in?("Local")
    local_model = model_for("Local")
    local_model_choices.each do |id|
      models << model_entry("Local", id, current: provider == "Local" && local_model == id)
    end
    models << model_entry("Local", local_model, current: provider == "Local") unless local_model.to_s.empty? || local_model_choices.include?(local_model)
  end

  # 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_reasoning_boundary: nil, on_assistant_delta: nil, on_retry: nil, cancellation: nil, steering: nil, max_tokens: nil, provider: nil, model: nil, reasoning: nil) ⇒ Object 



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# File 'lib/kward/model/client.rb', line 105

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

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

  validate_image_support!(resolved_provider, current_model, messages)
  request_body = JSON.dump(request_body_payload(resolved_provider, messages, tools, max_tokens: max_tokens, model: current_model, reasoning: reasoning))
  with_retries(resolved_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
      message = chat_provider_request(
        provider: resolved_provider,
        url: url,
        token: token,
        account_id: ,
        messages: messages,
        tools: tools,
        request_body: request_body,
        current_model: current_model,
        on_reasoning_delta: on_reasoning_delta,
        on_reasoning_boundary: on_reasoning_boundary,
        on_assistant_delta: on_assistant_delta,
        cancellation: cancellation,
        max_tokens: max_tokens
      )
    rescue StandardError => e
      status = "failed"
      error = e
      raise e
    ensure
      log_model_request(provider: resolved_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

#context_window(provider, model) ⇒ Object

Returns the known context window for a provider/model pair.



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# File 'lib/kward/model/client.rb', line 188

def context_window(provider, model)
  provider = ModelInfo.provider_label(provider)
  return local_context_window if provider == "Local"

  context_window_for(provider, model)
end

#current_context_parts(messages, tools, provider: current_provider, model: nil) ⇒ Object

Projects messages/tools into the provider-specific context shape without sending it.



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# File 'lib/kward/model/client.rb', line 251

def current_context_parts(messages, tools, provider: current_provider, model: nil)
  build_context_parts(ModelInfo.provider_label(provider), messages, tools, model: model)
end

#current_context_window ⇒ Object

Returns the known context window for the active provider/model pair.



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# File 'lib/kward/model/client.rb', line 182

def current_context_window
  state = current_model_state
  context_window(state[:provider], state[:model])
end

#current_model ⇒ Object

Returns the model id that will be used for the next request.



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# File 'lib/kward/model/client.rb', line 172

def current_model
  current_model_state[:model]
end

#current_provider ⇒ Object

Returns the active provider label after applying env/config/credential fallback rules.



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# File 'lib/kward/model/client.rb', line 161

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

Returns the configured reasoning effort for providers that support it.



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

def current_reasoning_effort
  current_model_state[:reasoning_effort]
end

#reload_config ⇒ Object

Reloads config-backed provider settings and clears live model catalog caches.



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# File 'lib/kward/model/client.rb', line 263

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

#supports_in_flight_steer? ⇒ Boolean

Returns whether the active provider can accept steering while a turn is streaming.

Returns:

  • (Boolean) 


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# File 'lib/kward/model/client.rb', line 256

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