Class: Aidp::Harness::ProviderManager

Inherits:
Object
  • Object
show all
Includes:
MessageDisplay, RescueLogging
Defined in:
lib/aidp/harness/provider_manager.rb

Overview

Manages provider switching and fallback logic

Constant Summary

Constants included from MessageDisplay

MessageDisplay::COLOR_MAP

Instance Method Summary collapse

Methods included from RescueLogging

__log_rescue_impl, log_rescue, #log_rescue

Methods included from MessageDisplay

#display_message, #in_test_environment?, included, #message_display_prompt, #suppress_display_message?

Constructor Details

#initialize(configuration, prompt: TTY::Prompt.new, binary_checker: Aidp::Util) ⇒ ProviderManager

Returns a new instance of ProviderManager.



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# File 'lib/aidp/harness/provider_manager.rb', line 16

def initialize(configuration, prompt: TTY::Prompt.new, binary_checker: Aidp::Util)
  @configuration = configuration
  @prompt = prompt
  @binary_checker = binary_checker
  @current_provider = nil
  @current_model = nil
  @provider_history = []
  @rate_limit_info = {}
  @provider_metrics = {}
  @fallback_chains = {}
  @provider_health = {}
  @retry_counts = {}
  @max_retries = 3
  @circuit_breaker_threshold = 5
  @circuit_breaker_timeout = 300 # 5 minutes
  @provider_weights = {}
  @load_balancing_enabled = true
  @sticky_sessions = {}
  @session_timeout = 1800 # 30 minutes
  @model_configs = {}
  @model_health = {}
  @model_metrics = {}
  @model_fallback_chains = {}
  @model_switching_enabled = true
  @model_weights = {}
  @unavailable_cache = {}
  @binary_check_cache = {}
  @binary_check_ttl = 300 # seconds

  # Initialize persistence
  project_dir = if configuration.respond_to?(:project_dir)
    configuration.project_dir
  elsif configuration.respond_to?(:root_dir)
    configuration.root_dir
  else
    Dir.pwd
  end
  @metrics_persistence = ProviderMetrics.new(project_dir)

  # Load persisted metrics
  load_persisted_metrics

  initialize_fallback_chains
  initialize_provider_health
  initialize_model_configs
  initialize_model_health
end

Instance Method Details

#all_metrics ⇒ Object

Get all provider metrics



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# File 'lib/aidp/harness/provider_manager.rb', line 1075

def all_metrics
  @provider_metrics.dup
end

#all_model_health_status ⇒ Object

Get all model health status



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# File 'lib/aidp/harness/provider_manager.rb', line 1342

def all_model_health_status
  @model_health.transform_values do |provider_models|
    provider_models.transform_values do |health|
      {
        status: health[:status],
        error_count: health[:error_count],
        success_count: health[:success_count],
        circuit_breaker_open: health[:circuit_breaker_open],
        last_updated: health[:last_updated],
        last_used: health[:last_used],
        last_rate_limited: health[:last_rate_limited]
      }
    end
  end
end

#all_model_metrics(provider_name) ⇒ Object

Get all model metrics for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 1059

def all_model_metrics(provider_name)
  @model_metrics[provider_name] || {}
end

#available_models(provider_name) ⇒ Object

Get available models for a provider



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# File 'lib/aidp/harness/provider_manager.rb', line 376

def available_models(provider_name)
  models = provider_models(provider_name)
  models.select do |model|
    model_available?(provider_name, model) &&
      is_model_healthy?(provider_name, model) &&
      !is_model_circuit_breaker_open?(provider_name, model)
  end
end

#available_providers ⇒ Object

Get available providers (not rate limited, healthy, and circuit breaker closed)



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# File 'lib/aidp/harness/provider_manager.rb', line 366

def available_providers
  all_providers = configured_providers
  all_providers.select do |provider|
    !is_rate_limited?(provider) &&
      is_provider_healthy?(provider) &&
      !is_provider_circuit_breaker_open?(provider)
  end
end

#build_default_fallback_chain(provider_name) ⇒ Object

Build default fallback chain



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# File 'lib/aidp/harness/provider_manager.rb', line 536

def build_default_fallback_chain(provider_name)
  all_providers = configured_providers

  # Harness-defined explicit ordering has priority
  harness_fallbacks = if @configuration.respond_to?(:fallback_providers)
    Array(@configuration.fallback_providers).map(&:to_s)
  else
    []
  end

  # Construct ordered chain:
  # 1. current provider first
  # 2. harness fallback providers (excluding current and de-duplicated)
  # 3. any remaining configured providers not already listed
  ordered = [provider_name]
  ordered += harness_fallbacks.reject { |p| p == provider_name || ordered.include?(p) }
  ordered += all_providers.reject { |p| ordered.include?(p) }

  @fallback_chains[provider_name] = ordered
  ordered
end

#build_default_model_fallback_chain(provider_name) ⇒ Object

Build default model fallback chain



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# File 'lib/aidp/harness/provider_manager.rb', line 434

def build_default_model_fallback_chain(provider_name)
  models = provider_models(provider_name)
  @model_fallback_chains[provider_name] = models.dup
  models
end

#calculate_current_usage(provider_name) ⇒ Object

Calculate current usage for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 634

def calculate_current_usage(provider_name)
  # Simple usage calculation based on recent activity
  provider_metrics = metrics(provider_name)
  return 0 if provider_metrics.empty?

  last_used = provider_metrics[:last_used]
  return 0 unless last_used

  # Higher usage if used recently
  time_since_last_use = Time.now - last_used
  if time_since_last_use < 60 # Used within last minute
    10
  elsif time_since_last_use < 300 # Used within last 5 minutes
    5
  else
    0
  end
end

#calculate_model_current_usage(provider_name, model_name) ⇒ Object

Calculate current usage for model



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# File 'lib/aidp/harness/provider_manager.rb', line 517

def calculate_model_current_usage(provider_name, model_name)
  metrics = model_metrics(provider_name, model_name)
  return 0 if metrics.empty?

  last_used = metrics[:last_used]
  return 0 unless last_used

  # Higher usage if used recently
  time_since_last_use = Time.now - last_used
  if time_since_last_use < 60 # Used within last minute
    10
  elsif time_since_last_use < 300 # Used within last 5 minutes
    5
  else
    0
  end
end

#calculate_model_load(provider_name, model_name) ⇒ Object

Calculate model load



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# File 'lib/aidp/harness/provider_manager.rb', line 503

def calculate_model_load(provider_name, model_name)
  metrics = model_metrics(provider_name, model_name)
  return 0 if metrics.empty?

  # Calculate load based on success rate, response time, and current usage
  success_rate = metrics[:successful_requests].to_f / [metrics[:total_requests], 1].max
  avg_response_time = metrics[:total_duration] / [metrics[:successful_requests], 1].max
  current_usage = calculate_model_current_usage(provider_name, model_name)

  # Load formula: higher is worse
  (1 - success_rate) * 100 + avg_response_time + current_usage
end

#calculate_model_reset_time(_provider_name, _model_name) ⇒ Object 



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# File 'lib/aidp/harness/provider_manager.rb', line 1645

def calculate_model_reset_time(_provider_name, _model_name)
  # Default reset time calculation for models
  # Most models reset rate limits every hour
  Time.now + (60 * 60)
end

#calculate_provider_load(provider_name) ⇒ Object

Calculate provider load



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# File 'lib/aidp/harness/provider_manager.rb', line 620

def calculate_provider_load(provider_name)
  provider_metrics = metrics(provider_name)
  return 0 if provider_metrics.empty?

  # Calculate load based on success rate, response time, and current usage
  success_rate = provider_metrics[:successful_requests].to_f / [provider_metrics[:total_requests], 1].max
  avg_response_time = provider_metrics[:total_duration] / [provider_metrics[:successful_requests], 1].max
  current_usage = calculate_current_usage(provider_name)

  # Load formula: higher is worse
  (1 - success_rate) * 100 + avg_response_time + current_usage
end

#calculate_reset_time(_provider_name) ⇒ Object 



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# File 'lib/aidp/harness/provider_manager.rb', line 1639

def calculate_reset_time(_provider_name)
  # Default reset time calculation
  # Most providers reset rate limits every hour
  Time.now + (60 * 60)
end

#cleanup_expired_rate_limits ⇒ Object

Clean up expired rate limits from memory



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# File 'lib/aidp/harness/provider_manager.rb', line 1686

def cleanup_expired_rate_limits
  now = Time.now
  @rate_limit_info.delete_if do |_provider, info|
    reset_time = info[:reset_time]
    reset_time && now >= reset_time
  end
end

#clear_model_rate_limit(provider_name, model_name) ⇒ Object

Clear rate limit for model



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# File 'lib/aidp/harness/provider_manager.rb', line 721

def clear_model_rate_limit(provider_name, model_name)
  @model_rate_limit_info ||= {}
  model_key = "#{provider_name}:#{model_name}"
  @model_rate_limit_info.delete(model_key)
end

#clear_rate_limit(provider_name) ⇒ Object

Clear rate limit for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 970

def clear_rate_limit(provider_name)
  @rate_limit_info.delete(provider_name)
end

#configure_model_weights(provider_name, weights) ⇒ Object

Configure model weights for load balancing



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# File 'lib/aidp/harness/provider_manager.rb', line 1364

def configure_model_weights(provider_name, weights)
  @model_weights[provider_name] = weights.dup
end

#configure_provider_weights(weights) ⇒ Object

Configure provider weights for load balancing



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# File 'lib/aidp/harness/provider_manager.rb', line 1359

def configure_provider_weights(weights)
  @provider_weights = weights.dup
end

#configured_providers ⇒ Object

Get configured providers from configuration



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# File 'lib/aidp/harness/provider_manager.rb', line 80

def configured_providers
  # Handle both Configuration and ConfigManager instances
  if @configuration.respond_to?(:configured_providers)
    @configuration.configured_providers
  else
    @configuration.provider_names
  end
end

#current_model ⇒ Object

Get current model



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# File 'lib/aidp/harness/provider_manager.rb', line 70

def current_model
  @current_model ||= default_model(current_provider)
end

#current_provider ⇒ Object

Get current provider



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# File 'lib/aidp/harness/provider_manager.rb', line 65

def current_provider
  @current_provider ||= @configuration.default_provider
end

#current_provider_model ⇒ Object

Get current provider and model combination



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# File 'lib/aidp/harness/provider_manager.rb', line 75

def current_provider_model
  "#{current_provider}:#{current_model}"
end

#default_flags(provider_name) ⇒ Object

Get default flags for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 985

def default_flags(provider_name)
  @configuration.default_flags(provider_name)
end

#default_model(provider_name) ⇒ Object

Get default model for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 406

def default_model(provider_name)
  models = provider_models(provider_name)
  return models.first if models.any?

  # Fallback to provider-specific defaults
  case provider_name
  when "claude"
    "claude-3-5-sonnet-20241022"
  when "gemini"
    "gemini-1.5-pro"
  when "cursor"
    "cursor-default"
  else
    "default"
  end
end

#execute_with_provider(provider_type, prompt, options = {}) ⇒ Object

Execute a prompt with a specific provider



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# File 'lib/aidp/harness/provider_manager.rb', line 1396

def execute_with_provider(provider_type, prompt, options = {})
  # Extract model from options if provided
  model_name = options.delete(:model)

  # Create provider factory instance
  provider_factory = ProviderFactory.new

  # Add model to provider options if specified
  provider_options = options.dup
  provider_options[:model] = model_name if model_name

  # Create provider instance
  provider = provider_factory.create_provider(provider_type, provider_options)

  # Set current provider and model
  @current_provider = provider_type
  @current_model = model_name if model_name

  Aidp.logger.debug("provider_manager", "Executing with provider",
    provider: provider_type,
    model: model_name,
    prompt_length: prompt.length)

  # Execute the prompt with the provider
  result = provider.send_message(prompt: prompt, session: nil)

  # Return structured result
  {
    status: "completed",
    provider: provider_type,
    model: model_name,
    output: result,
    metadata: {
      provider_type: provider_type,
      model: model_name,
      prompt_length: prompt.length,
      timestamp: Time.now.strftime("%Y-%m-%dT%H:%M:%S.%3N%z")
    }
  }
rescue => e
  log_rescue(e, component: "provider_manager", action: "execute_with_provider", fallback: "error_result", provider: provider_type, model: model_name, prompt_length: prompt.length)
  # Return error result
  {
    status: "error",
    provider: provider_type,
    error: e.message,
    metadata: {
      provider_type: provider_type,
      error_class: e.class.name,
      timestamp: Time.now.strftime("%Y-%m-%dT%H:%M:%S.%3N%z")
    }
  }
end

#fallback_chain(provider_name) ⇒ Object

Get fallback chain for a provider



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# File 'lib/aidp/harness/provider_manager.rb', line 424

def fallback_chain(provider_name)
  @fallback_chains[provider_name] || build_default_fallback_chain(provider_name)
end

#find_any_available_model(provider_name) ⇒ Object

Find any available model for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 456

def find_any_available_model(provider_name)
  available_models = available_models(provider_name)
  return nil if available_models.empty?

  # Use weighted selection if weights are configured
  if @model_weights[provider_name]&.any?
    select_model_by_weight(provider_name, available_models)
  else
    # Simple round-robin selection
    available_models.first
  end
end

#find_any_available_provider ⇒ Object

Find any available provider



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# File 'lib/aidp/harness/provider_manager.rb', line 574

def find_any_available_provider
  provider_list = available_providers
  return nil if provider_list.empty?

  # Use weighted selection if weights are configured
  if @provider_weights.any?
    select_provider_by_weight(provider_list)
  else
    # Simple round-robin selection
    provider_list.first
  end
end

#find_next_healthy_model(model_chain, current_model) ⇒ Object

Find next healthy model in fallback chain



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# File 'lib/aidp/harness/provider_manager.rb', line 441

def find_next_healthy_model(model_chain, current_model)
  current_index = model_chain.index(current_model) || -1

  # Start from next model in chain
  (current_index + 1...model_chain.size).each do |index|
    model = model_chain[index]
    if model_available?(current_provider, model)
      return model
    end
  end

  nil
end

#find_next_healthy_provider(fallback_chain, current_provider) ⇒ Object

Find next healthy provider in fallback chain



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# File 'lib/aidp/harness/provider_manager.rb', line 559

def find_next_healthy_provider(fallback_chain, current_provider)
  current_index = fallback_chain.index(current_provider) || -1

  # Start from next provider in chain
  (current_index + 1...fallback_chain.size).each do |index|
    provider = fallback_chain[index]
    if is_provider_available?(provider)
      return provider
    end
  end

  nil
end

#health_dashboard ⇒ Object

Summarize health and metrics for dashboard/CLI display



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# File 'lib/aidp/harness/provider_manager.rb', line 1186

def health_dashboard
  now = Time.now
  statuses = provider_health_status
  metrics = all_metrics
  configured = configured_providers
  rows_by_normalized = {}
  configured.each do |prov|
    # Temporarily hide macos provider until it's user-configurable
    next if prov == "macos"
    normalized = normalize_provider_name(prov)
    cli_ok_prefetch, cli_reason_prefetch = provider_cli_available?(prov)
    h = statuses[prov] || {}
    m = metrics[prov] || {}
    rl = @rate_limit_info[prov]
    reset_in = (rl && rl[:reset_time]) ? [(rl[:reset_time] - now).to_i, 0].max : nil
    cb_remaining = if h[:circuit_breaker_open] && h[:circuit_breaker_opened_at]
      elapsed = now - h[:circuit_breaker_opened_at]
      rem = @circuit_breaker_timeout - elapsed
      rem.positive? ? rem.to_i : 0
    end
    row = {
      provider: normalized,
      installed: provider_installed?(prov),
      status: h[:status] || (provider_installed?(prov) ? "unknown" : "uninstalled"),
      unhealthy_reason: h[:unhealthy_reason],
      available: false, # will set true below only if all checks pass
      circuit_breaker: h[:circuit_breaker_open] ? "open" : "closed",
      circuit_breaker_remaining: cb_remaining,
      rate_limited: !!rl,
      rate_limit_reset_in: reset_in,
      total_requests: m[:total_requests] || 0,
      failed_requests: m[:failed_requests] || 0,
      success_requests: m[:successful_requests] || 0,
      total_tokens: m[:total_tokens] || 0,
      last_used: m[:last_used]
    }
    # Incorporate CLI check outcome into reason/availability if failing
    unless cli_ok_prefetch
      row[:available] = false
      row[:unhealthy_reason] ||= cli_reason_prefetch
      row[:status] = "unhealthy" if row[:status] == "healthy" || row[:status] == "healthy_auth"
    end
    if cli_ok_prefetch && is_provider_available?(prov)
      row[:available] = true
    end
    if (existing = rows_by_normalized[normalized])
      # Merge metrics: sum counts/tokens, keep most severe status, earliest unhealthy reason if any
      existing[:total_requests] += row[:total_requests]
      existing[:failed_requests] += row[:failed_requests]
      existing[:success_requests] += row[:success_requests]
      existing[:total_tokens] += row[:total_tokens]
      # If either unavailable then mark unavailable
      existing[:available] &&= row[:available]
      # Prefer an unhealthy or circuit breaker status over healthy
      existing[:status] = merge_status_priority(existing[:status], row[:status])
      existing[:unhealthy_reason] ||= row[:unhealthy_reason]
      # Circuit breaker open takes precedence
      if row[:circuit_breaker] == "open"
        existing[:circuit_breaker] = "open"
        existing[:circuit_breaker_remaining] = [existing[:circuit_breaker_remaining].to_i, row[:circuit_breaker_remaining].to_i].max
      end
      # Rate limited if any underlying
      if row[:rate_limited]
        existing[:rate_limited] = true
        existing[:rate_limit_reset_in] = [existing[:rate_limit_reset_in].to_i, row[:rate_limit_reset_in].to_i].max
      end
      # Keep most recent last_used
      if row[:last_used] && (!existing[:last_used] || row[:last_used] > existing[:last_used])
        existing[:last_used] = row[:last_used]
      end
    else
      rows_by_normalized[normalized] = row
    end
  end
  rows_by_normalized.values
end

#is_model_circuit_breaker_open?(provider_name, model_name) ⇒ Boolean

Check if model circuit breaker is open

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 736

def is_model_circuit_breaker_open?(provider_name, model_name)
  health = @model_health[provider_name]&.dig(model_name)
  return false unless health

  if health[:circuit_breaker_open]
    # Check if timeout has passed
    if health[:circuit_breaker_opened_at] &&
        Time.now - health[:circuit_breaker_opened_at] > @circuit_breaker_timeout
      # Reset circuit breaker
      reset_model_circuit_breaker(provider_name, model_name)
      return false
    end
    return true
  end

  false
end

#is_model_healthy?(provider_name, model_name) ⇒ Boolean

Check if model is healthy

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 728

def is_model_healthy?(provider_name, model_name)
  health = @model_health[provider_name]&.dig(model_name)
  return true unless health # Default to healthy if no health info

  health[:status] == "healthy"
end

#is_model_rate_limited?(provider_name, model_name) ⇒ Boolean

Check if model is rate limited

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 691

def is_model_rate_limited?(provider_name, model_name)
  info = @model_rate_limit_info ||= {}
  model_key = "#{provider_name}:#{model_name}"
  rate_limit_info = info[model_key]
  return false unless rate_limit_info

  reset_time = rate_limit_info[:reset_time]
  reset_time && Time.now < reset_time
end

#is_provider_available?(provider_name) ⇒ Boolean

Check if provider is available (not rate limited, healthy, circuit breaker closed)

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 654

def is_provider_available?(provider_name)
  cli_ok, _reason = provider_cli_available?(provider_name)
  return false unless cli_ok
  return false if is_rate_limited?(provider_name)
  return false unless is_provider_healthy?(provider_name)
  return false if is_provider_circuit_breaker_open?(provider_name)
  true
end

#is_provider_circuit_breaker_open?(provider_name) ⇒ Boolean

Check if provider circuit breaker is open

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 847

def is_provider_circuit_breaker_open?(provider_name)
  health = @provider_health[provider_name]
  return false unless health

  if health[:circuit_breaker_open]
    # Check if timeout has passed
    if health[:circuit_breaker_opened_at] &&
        Time.now - health[:circuit_breaker_opened_at] > @circuit_breaker_timeout
      # Reset circuit breaker
      reset_circuit_breaker(provider_name)
      return false
    end
    return true
  end

  false
end

#is_provider_healthy?(provider_name) ⇒ Boolean

Check if provider is healthy

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 839

def is_provider_healthy?(provider_name)
  health = @provider_health[provider_name]
  return true unless health # Default to healthy if no health info

  health[:status] == "healthy"
end

#is_rate_limited?(provider_name) ⇒ Boolean

Check if provider is rate limited

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 830

def is_rate_limited?(provider_name)
  info = @rate_limit_info[provider_name]
  return false unless info

  reset_time = info[:reset_time]
  reset_time && Time.now < reset_time
end

#load_persisted_metrics ⇒ Object

Load persisted metrics from disk



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# File 'lib/aidp/harness/provider_manager.rb', line 1652

def load_persisted_metrics
  return unless @metrics_persistence

  # Load provider metrics
  persisted_metrics = @metrics_persistence.load_metrics
  @provider_metrics.merge!(persisted_metrics) if persisted_metrics.is_a?(Hash)

  # Load rate limit info
  persisted_rate_limits = @metrics_persistence.load_rate_limits
  @rate_limit_info.merge!(persisted_rate_limits) if persisted_rate_limits.is_a?(Hash)

  # Clean up expired rate limits
  cleanup_expired_rate_limits
rescue => e
  log_rescue(e, component: "provider_manager", action: "load_persisted_metrics", fallback: nil)
end

#log_circuit_breaker_event(provider_name, event) ⇒ Object

Log circuit breaker event



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# File 'lib/aidp/harness/provider_manager.rb', line 1603

def log_circuit_breaker_event(provider_name, event)
  case event
  when "opened"
    display_message("🔴 Circuit breaker opened for provider: #{provider_name}", type: :error)
  when "reset"
    display_message("🟢 Circuit breaker reset for provider: #{provider_name}", type: :success)
  end
end

#log_model_circuit_breaker_event(provider_name, model_name, event) ⇒ Object

Log model circuit breaker event



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# File 'lib/aidp/harness/provider_manager.rb', line 1630

def log_model_circuit_breaker_event(provider_name, model_name, event)
  case event
  when "opened"
    display_message("🔴 Circuit breaker opened for model: #{provider_name}:#{model_name}", type: :error)
  when "reset"
    display_message("🟢 Circuit breaker reset for model: #{provider_name}:#{model_name}", type: :success)
  end
end

#log_model_switch(from_model, to_model, reason, context) ⇒ Object

Log model switch



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# File 'lib/aidp/harness/provider_manager.rb', line 1613

def log_model_switch(from_model, to_model, reason, context)
  display_message("🔄 Model switch: #{from_model} → #{to_model} (#{reason})", type: :info)
  if context.any?
    display_message("   Context: #{context.inspect}", type: :muted)
  end
end

#log_no_models_available(provider_name, reason, context) ⇒ Object

Log no models available



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# File 'lib/aidp/harness/provider_manager.rb', line 1621

def log_no_models_available(provider_name, reason, context)
  display_message("❌ No models available for provider #{provider_name} (#{reason})", type: :error)
  display_message("   All models are rate limited, unhealthy, or circuit breaker open", type: :warning)
  if context.any?
    display_message("   Context: #{context.inspect}", type: :muted)
  end
end

#log_no_providers_available(reason, context) ⇒ Object

Log no providers available



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# File 'lib/aidp/harness/provider_manager.rb', line 1570

def log_no_providers_available(reason, context)
  display_message("❌ No providers available for switching (#{reason})", type: :error)

  # Check if we have any fallback providers configured
  harness_fallbacks = if @configuration.respond_to?(:fallback_providers)
    Array(@configuration.fallback_providers).compact
  else
    []
  end

  all_providers = configured_providers

  if harness_fallbacks.empty? && all_providers.size <= 1
    display_message("   No fallback providers configured in aidp.yml", type: :warning)
    display_message("   💡 Add fallback providers to enable automatic failover:", type: :info)
    display_message("      harness:", type: :muted)
    display_message("        fallback_providers:", type: :muted)
    display_message("          - anthropic", type: :muted)
    display_message("          - gemini", type: :muted)
    display_message("   Run 'aidp config --interactive' to configure providers", type: :info)
  else
    display_message("   All providers are rate limited, unhealthy, or circuit breaker open", type: :warning)
    if harness_fallbacks.any?
      display_message("   Configured fallbacks: #{harness_fallbacks.join(", ")}", type: :muted)
    end
  end

  if context.any?
    display_message("   Context: #{context.inspect}", type: :muted)
  end
end

#log_provider_switch(from_provider, to_provider, reason, context) ⇒ Object

Log provider switch



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# File 'lib/aidp/harness/provider_manager.rb', line 1556

def log_provider_switch(from_provider, to_provider, reason, context)
  if from_provider == to_provider
    # Same provider - this indicates no fallback was possible
    display_message("⚠️  Provider switch failed: #{from_provider} → #{to_provider} (#{reason})", type: :warning)
    display_message("   No alternative providers available", type: :warning)
  else
    display_message("🔄 Provider switch: #{from_provider} → #{to_provider} (#{reason})", type: :info)
  end
  if context.any?
    display_message("   Context: #{context.inspect}", type: :muted)
  end
end

#mark_model_rate_limited(provider_name, model_name, reset_time = nil) ⇒ Object

Mark model as rate limited



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# File 'lib/aidp/harness/provider_manager.rb', line 702

def mark_model_rate_limited(provider_name, model_name, reset_time = nil)
  @model_rate_limit_info ||= {}
  model_key = "#{provider_name}:#{model_name}"
  @model_rate_limit_info[model_key] = {
    rate_limited_at: Time.now,
    reset_time: reset_time || calculate_model_reset_time(provider_name, model_name),
    error_count: (@model_rate_limit_info[model_key]&.dig(:error_count) || 0) + 1
  }

  # Update model health
  update_model_health(provider_name, model_name, "rate_limited")

  # Switch to next model if current one is rate limited
  if provider_name == current_provider && model_name == current_model
    switch_model("rate_limit", {provider: provider_name, model: model_name})
  end
end

#mark_provider_auth_failure(provider_name) ⇒ Object 



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# File 'lib/aidp/harness/provider_manager.rb', line 677

def mark_provider_auth_failure(provider_name)
  mark_provider_unhealthy(provider_name, reason: "auth", open_circuit: true)
end

#mark_provider_failure_exhausted(provider_name) ⇒ Object

Mark provider unhealthy specifically due to failure exhaustion (non-auth)



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# File 'lib/aidp/harness/provider_manager.rb', line 682

def mark_provider_failure_exhausted(provider_name)
  return unless @provider_health[provider_name]
  health = @provider_health[provider_name]
  # Don't override more critical states (auth or circuit already open)
  return if health[:unhealthy_reason] == "auth"
  mark_provider_unhealthy(provider_name, reason: "fail_exhausted", open_circuit: true)
end

#mark_provider_unhealthy(provider_name, reason: "manual", open_circuit: true) ⇒ Object

Mark provider unhealthy (auth or generic) and optionally open circuit breaker



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# File 'lib/aidp/harness/provider_manager.rb', line 664

def mark_provider_unhealthy(provider_name, reason: "manual", open_circuit: true)
  return unless @provider_health[provider_name]
  health = @provider_health[provider_name]
  health[:status] = (reason == "auth") ? "unhealthy_auth" : "unhealthy"
  health[:last_updated] = Time.now
  health[:unhealthy_reason] = reason
  if open_circuit
    health[:circuit_breaker_open] = true
    health[:circuit_breaker_opened_at] = Time.now
    log_circuit_breaker_event(provider_name, "opened")
  end
end

#mark_rate_limited(provider_name, reset_time = nil) ⇒ Object

Mark provider as rate limited



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# File 'lib/aidp/harness/provider_manager.rb', line 940

def mark_rate_limited(provider_name, reset_time = nil)
  @rate_limit_info[provider_name] = {
    rate_limited_at: Time.now,
    reset_time: reset_time || calculate_reset_time(provider_name),
    error_count: (@rate_limit_info[provider_name]&.dig(:error_count) || 0) + 1
  }

  # Update provider health
  update_provider_health(provider_name, "rate_limited")

  # Persist rate limit info to disk
  save_persisted_rate_limits

  # Switch to next provider if current one is rate limited
  if provider_name == current_provider
    switch_provider("rate_limit", {provider: provider_name})
  end
end

#metrics(provider_name) ⇒ Object

Get provider metrics



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# File 'lib/aidp/harness/provider_manager.rb', line 1070

def metrics(provider_name)
  @provider_metrics[provider_name] || {}
end

#model_available?(provider_name, model_name) ⇒ Boolean

Check if model is available

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 386

def model_available?(provider_name, model_name)
  # Check if model is configured for provider
  return false unless model_configured?(provider_name, model_name)

  # Check if model is not rate limited
  !is_model_rate_limited?(provider_name, model_name)
end

#model_configured?(provider_name, model_name) ⇒ Boolean

Check if model is configured for provider

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 395

def model_configured?(provider_name, model_name)
  models = provider_models(provider_name)
  models.include?(model_name)
end

#model_fallback_chain(provider_name) ⇒ Object

Get fallback chain for models within a provider



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# File 'lib/aidp/harness/provider_manager.rb', line 429

def model_fallback_chain(provider_name)
  @model_fallback_chains[provider_name] || build_default_model_fallback_chain(provider_name)
end

#model_health_status(provider_name) ⇒ Object

Get detailed model health status



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# File 'lib/aidp/harness/provider_manager.rb', line 1327

def model_health_status(provider_name)
  @model_health[provider_name]&.transform_values do |health|
    {
      status: health[:status],
      error_count: health[:error_count],
      success_count: health[:success_count],
      circuit_breaker_open: health[:circuit_breaker_open],
      last_updated: health[:last_updated],
      last_used: health[:last_used],
      last_rate_limited: health[:last_rate_limited]
    }
  end || {}
end

#model_history ⇒ Object

Get model history



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# File 'lib/aidp/harness/provider_manager.rb', line 1064

def model_history
  @model_history ||= []
  @model_history.dup
end

#model_metrics(provider_name, model_name) ⇒ Object

Get model metrics



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# File 'lib/aidp/harness/provider_manager.rb', line 1054

def model_metrics(provider_name, model_name)
  @model_metrics[provider_name]&.dig(model_name) || {}
end

#next_reset_time ⇒ Object

Get next reset time for any provider



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# File 'lib/aidp/harness/provider_manager.rb', line 960

def next_reset_time
  reset_times = @rate_limit_info.values
    .map { |info| info[:reset_time] }
    .compact
    .select { |time| time > Time.now }

  reset_times.min
end

#open_circuit_breaker(provider_name) ⇒ Object

Open circuit breaker for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 914

def open_circuit_breaker(provider_name)
  health = @provider_health[provider_name]
  return unless health

  health[:circuit_breaker_open] = true
  health[:circuit_breaker_opened_at] = Time.now
  health[:status] = "circuit_breaker_open"

  log_circuit_breaker_event(provider_name, "opened")
end

#open_model_circuit_breaker(provider_name, model_name) ⇒ Object

Open circuit breaker for model



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# File 'lib/aidp/harness/provider_manager.rb', line 804

def open_model_circuit_breaker(provider_name, model_name)
  health = @model_health[provider_name]&.dig(model_name)
  return unless health

  health[:circuit_breaker_open] = true
  health[:circuit_breaker_opened_at] = Time.now
  health[:status] = "circuit_breaker_open"

  log_model_circuit_breaker_event(provider_name, model_name, "opened")
end

#provider_cli_available?(provider_name) ⇒ Boolean

Attempt to run a provider’s CLI with –version (or no-op) to verify executable health

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 1105

def provider_cli_available?(provider_name)
  normalized = normalize_provider_name(provider_name)

  cache_key = "#{provider_name}:#{normalized}"
  cached = @binary_check_cache[cache_key]
  if cached && (Time.now - cached[:checked_at] < @binary_check_ttl)
    return [cached[:ok], cached[:reason]]
  end
  # Map normalized provider -> binary
  binary = case normalized
  when "claude" then "claude"
  when "cursor" then "cursor"
  when "gemini" then "gemini"
  when "macos" then nil # passthrough; no direct binary expected
  end
  unless binary
    @binary_check_cache[cache_key] = {ok: true, reason: nil, checked_at: Time.now}
    return [true, nil]
  end
  path = begin
    @binary_checker.which(binary)
  rescue => e
    log_rescue(e, component: "provider_manager", action: "locate_binary", fallback: nil, binary: binary)
    nil
  end
  unless path
    @binary_check_cache[cache_key] = {ok: false, reason: "binary_missing", checked_at: Time.now}
    return [false, "binary_missing"]
  end
  # Light command execution to ensure it responds quickly
  ok = true
  reason = nil
  begin
    # Use IO.popen to avoid shell injection and impose a short timeout
    r, w = IO.pipe
    pid = Process.spawn(binary, "--version", out: w, err: w)
    w.close
    # Wait for process to exit with timeout
    begin
      Aidp::Concurrency::Wait.for_process_exit(pid, timeout: 3, interval: 0.05)
    rescue Aidp::Concurrency::TimeoutError
      # Timeout -> kill process
      begin
        Process.kill("TERM", pid)
      rescue => e
        log_rescue(e, component: "provider_manager", action: "kill_timeout_process_term", fallback: nil, binary: binary, pid: pid)
        nil
      end

      # Brief wait for TERM to take effect
      begin
        Aidp::Concurrency::Wait.for_process_exit(pid, timeout: 0.1, interval: 0.02)
      rescue Aidp::Concurrency::TimeoutError
        # TERM didn't work, use KILL
        begin
          Process.kill("KILL", pid)
        rescue => e
          log_rescue(e, component: "provider_manager", action: "kill_timeout_process_kill", fallback: nil, binary: binary, pid: pid)
          nil
        end
      end

      ok = false
      reason = "binary_timeout"
    end
    output = r.read.to_s
    r.close
    if ok && output.strip.empty?
      # Some CLIs require just calling without args; treat empty as still OK
      ok = true
    end
  rescue => e
    log_rescue(e, component: "provider_manager", action: "verify_binary_health", fallback: "binary_error", binary: binary)
    ok = false
    reason = e.class.name.downcase.include?("enoent") ? "binary_missing" : "binary_error"
  end
  @binary_check_cache[cache_key] = {ok: ok, reason: reason, checked_at: Time.now}
  [ok, reason]
end

#provider_config(provider_name) ⇒ Object

Get provider configuration



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# File 'lib/aidp/harness/provider_manager.rb', line 975

def provider_config(provider_name)
  @configuration.provider_config(provider_name)
end

#provider_health_status ⇒ Object

Get detailed provider health status



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# File 'lib/aidp/harness/provider_manager.rb', line 1310

def provider_health_status
  @provider_health.transform_values do |health|
    {
      status: health[:status],
      error_count: health[:error_count],
      success_count: health[:success_count],
      circuit_breaker_open: health[:circuit_breaker_open],
      last_updated: health[:last_updated],
      last_used: health[:last_used],
      last_rate_limited: health[:last_rate_limited],
      circuit_breaker_opened_at: health[:circuit_breaker_opened_at],
      unhealthy_reason: health[:unhealthy_reason]
    }
  end
end

#provider_history ⇒ Object

Get provider history



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# File 'lib/aidp/harness/provider_manager.rb', line 1264

def provider_history
  @provider_history.dup
end

#provider_installed?(provider_name) ⇒ Boolean

Determine whether a provider CLI/binary appears installed

Returns:

  • (Boolean) 


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# File 'lib/aidp/harness/provider_manager.rb', line 1080

def provider_installed?(provider_name)
  return @unavailable_cache[provider_name] unless @unavailable_cache[provider_name].nil?
  installed = true
  begin
    case provider_name
    when "anthropic", "claude"
      # Prefer direct binary probe instead of Anthropic.available? (which uses which internally)
      path = begin
        Aidp::Util.which("claude")
      rescue
        nil
      end
      installed = !path.nil?
    when "cursor"
      require_relative "../providers/cursor"
      installed = Aidp::Providers::Cursor.available?
    end
  rescue LoadError => e
    log_rescue(e, component: "provider_manager", action: "check_provider_availability", fallback: false, provider: provider_name)
    installed = false
  end
  @unavailable_cache[provider_name] = installed
end

#provider_models(provider_name) ⇒ Object

Get models for a provider



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# File 'lib/aidp/harness/provider_manager.rb', line 401

def provider_models(provider_name)
  @model_configs[provider_name] || []
end

#provider_type(provider_name) ⇒ Object

Get provider type



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# File 'lib/aidp/harness/provider_manager.rb', line 980

def provider_type(provider_name)
  @configuration.provider_type(provider_name)
end

#record_metrics(provider_name, success:, duration:, tokens_used: nil, error: nil) ⇒ Object

Record provider metrics



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# File 'lib/aidp/harness/provider_manager.rb', line 990

def record_metrics(provider_name, success:, duration:, tokens_used: nil, error: nil)
  @provider_metrics[provider_name] ||= {
    total_requests: 0,
    successful_requests: 0,
    failed_requests: 0,
    total_duration: 0.0,
    total_tokens: 0,
    last_used: nil,
    last_error: nil,
    last_error_time: nil
  }

  metrics = @provider_metrics[provider_name]
  metrics[:total_requests] += 1
  metrics[:last_used] = Time.now

  if success
    metrics[:successful_requests] += 1
    metrics[:total_duration] += duration
    metrics[:total_tokens] += tokens_used if tokens_used
    update_provider_health(provider_name, "success")
  else
    metrics[:failed_requests] += 1
    metrics[:last_error] = error&.message || "Unknown error"
    metrics[:last_error_time] = Time.now
    update_provider_health(provider_name, "error", {error: error})
  end

  # Persist metrics to disk
  save_persisted_metrics
end

#record_model_metrics(provider_name, model_name, success:, duration:, tokens_used: nil, error: nil) ⇒ Object

Record model metrics



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# File 'lib/aidp/harness/provider_manager.rb', line 1023

def record_model_metrics(provider_name, model_name, success:, duration:, tokens_used: nil, error: nil)
  @model_metrics[provider_name] ||= {}
  @model_metrics[provider_name][model_name] ||= {
    total_requests: 0,
    successful_requests: 0,
    failed_requests: 0,
    total_duration: 0.0,
    total_tokens: 0,
    last_used: nil,
    last_error: nil,
    last_error_time: nil
  }

  metrics = @model_metrics[provider_name][model_name]
  metrics[:total_requests] += 1
  metrics[:last_used] = Time.now

  if success
    metrics[:successful_requests] += 1
    metrics[:total_duration] += duration
    metrics[:total_tokens] += tokens_used if tokens_used
    update_model_health(provider_name, model_name, "success")
  else
    metrics[:failed_requests] += 1
    metrics[:last_error] = error&.message || "Unknown error"
    metrics[:last_error_time] = Time.now
    update_model_health(provider_name, model_name, "error", {error: error})
  end
end

#reset ⇒ Object

Reset all provider state



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# File 'lib/aidp/harness/provider_manager.rb', line 1269

def reset
  @current_provider = nil
  @current_model = nil
  @provider_history.clear
  @rate_limit_info.clear
  @provider_metrics.clear
  @provider_health.clear
  @retry_counts.clear
  @sticky_sessions.clear
  @model_configs.clear
  @model_health.clear
  @model_metrics.clear
  @model_fallback_chains.clear
  @model_rate_limit_info&.clear
  @model_history&.clear
  initialize_fallback_chains
  initialize_provider_health
  initialize_model_configs
  initialize_model_health
end

#reset_circuit_breaker(provider_name) ⇒ Object

Reset circuit breaker for provider



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# File 'lib/aidp/harness/provider_manager.rb', line 926

def reset_circuit_breaker(provider_name)
  health = @provider_health[provider_name]
  return unless health

  was_open = health[:circuit_breaker_open]
  health[:circuit_breaker_open] = false
  health[:circuit_breaker_opened_at] = nil
  health[:error_count] = 0
  health[:status] = "healthy"

  log_circuit_breaker_event(provider_name, "reset") if was_open
end

#reset_model_circuit_breaker(provider_name, model_name) ⇒ Object

Reset circuit breaker for model



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# File 'lib/aidp/harness/provider_manager.rb', line 816

def reset_model_circuit_breaker(provider_name, model_name)
  health = @model_health[provider_name]&.dig(model_name)
  return unless health

  was_open = health[:circuit_breaker_open]
  health[:circuit_breaker_open] = false
  health[:circuit_breaker_opened_at] = nil
  health[:error_count] = 0
  health[:status] = "healthy"

  log_model_circuit_breaker_event(provider_name, model_name, "reset") if was_open
end

#save_persisted_metrics ⇒ Object

Save persisted metrics to disk



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# File 'lib/aidp/harness/provider_manager.rb', line 1670

def save_persisted_metrics
  return unless @metrics_persistence
  @metrics_persistence.save_metrics(@provider_metrics)
rescue => e
  log_rescue(e, component: "provider_manager", action: "save_persisted_metrics", fallback: nil)
end

#save_persisted_rate_limits ⇒ Object

Save persisted rate limits to disk



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# File 'lib/aidp/harness/provider_manager.rb', line 1678

def save_persisted_rate_limits
  return unless @metrics_persistence
  @metrics_persistence.save_rate_limits(@rate_limit_info)
rescue => e
  log_rescue(e, component: "provider_manager", action: "save_persisted_rate_limits", fallback: nil)
end

#select_model_by_load_balancing(provider_name) ⇒ Object

Select model by load balancing



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# File 'lib/aidp/harness/provider_manager.rb', line 470

def select_model_by_load_balancing(provider_name)
  available_models = available_models(provider_name)
  return nil if available_models.empty?

  # Calculate load for each model
  model_loads = available_models.map do |model|
    load = calculate_model_load(provider_name, model)
    [model, load]
  end

  # Select model with lowest load
  model_loads.min_by { |_, load| load }&.first
end

#select_model_by_weight(provider_name, available_models) ⇒ Object

Select model by weight



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# File 'lib/aidp/harness/provider_manager.rb', line 485

def select_model_by_weight(provider_name, available_models)
  weights = @model_weights[provider_name] || {}
  total_weight = available_models.sum { |model| weights[model] || 1 }
  return available_models.first if total_weight == 0

  random_value = rand(total_weight)
  current_weight = 0

  available_models.each do |model|
    weight = weights[model] || 1
    current_weight += weight
    return model if random_value < current_weight
  end

  available_models.last
end

#select_provider_by_load_balancing ⇒ Object

Select provider by load balancing



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# File 'lib/aidp/harness/provider_manager.rb', line 588

def select_provider_by_load_balancing
  provider_list = available_providers
  return nil if provider_list.empty?

  # Calculate load for each provider
  provider_loads = provider_list.map do |provider|
    load = calculate_provider_load(provider)
    [provider, load]
  end

  # Select provider with lowest load
  provider_loads.min_by { |_, load| load }&.first
end

#select_provider_by_weight(available_providers) ⇒ Object

Select provider by weight



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# File 'lib/aidp/harness/provider_manager.rb', line 603

def select_provider_by_weight(available_providers)
  total_weight = available_providers.sum { |provider| @provider_weights[provider] || 1 }
  return available_providers.first if total_weight == 0

  random_value = rand(total_weight)
  current_weight = 0

  available_providers.each do |provider|
    weight = @provider_weights[provider] || 1
    current_weight += weight
    return provider if random_value < current_weight
  end

  available_providers.last
end

#set_current_model(model_name, reason = "manual_switch", context = {}) ⇒ Object

Set current model with enhanced validation



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# File 'lib/aidp/harness/provider_manager.rb', line 295

def set_current_model(model_name, reason = "manual_switch", context = {})
  return false unless model_available?(current_provider, model_name)
  return false unless is_model_healthy?(current_provider, model_name)
  return false if is_model_circuit_breaker_open?(current_provider, model_name)

  # Update model health
  update_model_health(current_provider, model_name, "switched_to")

  # Record model switch
  @model_history ||= []
  @model_history << {
    provider: current_provider,
    model: model_name,
    switched_at: Time.now,
    reason: reason,
    context: context,
    previous_model: @current_model
  }

  @current_model = model_name
  true
end

#set_current_provider(provider_name, reason = "manual_switch", context = {}) ⇒ Object

Set current provider with enhanced validation



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# File 'lib/aidp/harness/provider_manager.rb', line 319

def set_current_provider(provider_name, reason = "manual_switch", context = {})
  # Use provider_config for ConfigManager, provider_configured? for legacy Configuration
  config_exists = if @configuration.respond_to?(:provider_config)
    @configuration.provider_config(provider_name)
  else
    @configuration.provider_configured?(provider_name)
  end

  unless config_exists
    Aidp.logger.warn("provider_manager", "Provider not configured", provider: provider_name)
    return false
  end

  unless is_provider_healthy?(provider_name)
    Aidp.logger.warn("provider_manager", "Provider not healthy", provider: provider_name)
    return false
  end

  if is_provider_circuit_breaker_open?(provider_name)
    Aidp.logger.warn("provider_manager", "Provider circuit breaker open", provider: provider_name)
    return false
  end

  # Update provider health
  update_provider_health(provider_name, "switched_to")

  # Record provider switch
  @provider_history << {
    provider: provider_name,
    switched_at: Time.now,
    reason: reason,
    context: context,
    previous_provider: @current_provider
  }

  # Update sticky session if enabled
  update_sticky_session(provider_name) if context[:session_id]

  # Reset current model when switching providers
  @current_model = default_model(provider_name)

  @current_provider = provider_name
  Aidp.logger.info("provider_manager", "Provider activated", provider: provider_name, reason: reason)
  true
end

#set_load_balancing(enabled) ⇒ Object

Enable/disable load balancing



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# File 'lib/aidp/harness/provider_manager.rb', line 1369

def set_load_balancing(enabled)
  @load_balancing_enabled = enabled
end

#set_model_switching(enabled) ⇒ Object

Enable/disable model switching



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# File 'lib/aidp/harness/provider_manager.rb', line 1374

def set_model_switching(enabled)
  @model_switching_enabled = enabled
end

#status ⇒ Object

Get status summary



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# File 'lib/aidp/harness/provider_manager.rb', line 1291

def status
  {
    current_provider: current_provider,
    current_model: current_model,
    current_provider_model: current_provider_model,
    available_providers: available_providers,
    rate_limited_providers: @rate_limit_info.keys,
    unhealthy_providers: @provider_health.select { |_, health| health[:status] != "healthy" }.keys,
    circuit_breaker_open: @provider_health.select { |_, health| health[:circuit_breaker_open] }.keys,
    next_reset_time: next_reset_time,
    total_switches: @provider_history.size,
    load_balancing_enabled: @load_balancing_enabled,
    provider_weights: @provider_weights,
    model_switching_enabled: @model_switching_enabled,
    model_weights: @model_weights
  }
end

#sticky_session_provider(session_id) ⇒ Object

Get sticky session provider



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# File 'lib/aidp/harness/provider_manager.rb', line 1384

def sticky_session_provider(session_id)
  return nil unless session_id

  # Find provider with recent session activity
  recent_sessions = @sticky_sessions.select do |_, time|
    Time.now - time < @session_timeout
  end

  recent_sessions.max_by { |_, time| time }&.first
end

#switch_model(reason = "manual_switch", context = {}) ⇒ Object

Switch to next available model within current provider



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# File 'lib/aidp/harness/provider_manager.rb', line 204

def switch_model(reason = "manual_switch", context = {})
  return nil unless @model_switching_enabled

  # Get fallback chain for current provider's models
  model_chain = model_fallback_chain(current_provider)

  # Find next healthy model in fallback chain
  next_model = find_next_healthy_model(model_chain, current_model)

  if next_model
    success = set_current_model(next_model, reason, context)
    if success
      log_model_switch(current_model, next_model, reason, context)
      return next_model
    end
  end

  # If no model in fallback chain, try load balancing
  if @load_balancing_enabled
    next_model = select_model_by_load_balancing(current_provider)
    if next_model
      success = set_current_model(next_model, reason, context)
      if success
        log_model_switch(current_model, next_model, reason, context)
        return next_model
      end
    end
  end

  # Last resort: try any available model
  next_model = find_any_available_model(current_provider)
  if next_model
    success = set_current_model(next_model, reason, context)
    if success
      log_model_switch(current_model, next_model, reason, context)
      return next_model
    end
  end

  # No models available
  log_no_models_available(current_provider, reason, context)
  nil
end

#switch_model_for_error(error_type, error_details = {}) ⇒ Object

Switch model for specific error type



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# File 'lib/aidp/harness/provider_manager.rb', line 249

def switch_model_for_error(error_type, error_details = {})
  return nil unless @model_switching_enabled

  case error_type
  when "rate_limit"
    switch_model("rate_limit", error_details)
  when "model_unavailable"
    switch_model("model_unavailable", error_details)
  when "model_error"
    switch_model("model_error", error_details)
  when "timeout"
    switch_model("timeout", error_details)
  else
    switch_model("error", {error_type: error_type}.merge(error_details))
  end
end

#switch_model_with_retry(reason = "retry", max_retries = @max_retries) ⇒ Object

Switch model with retry logic



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# File 'lib/aidp/harness/provider_manager.rb', line 267

def switch_model_with_retry(reason = "retry", max_retries = @max_retries)
  return nil unless @model_switching_enabled

  attempt_count = 0

  Aidp::Concurrency::Backoff.retry(
    max_attempts: max_retries,
    base: 0.5,
    strategy: :exponential,
    jitter: 0.2,
    on: [StandardError]
  ) do
    attempt_count += 1
    next_model = switch_model(reason, {retry_count: attempt_count - 1})

    if next_model
      return next_model
    else
      # Raise to trigger retry
      raise "Model switch failed on attempt #{attempt_count}"
    end
  end
rescue Aidp::Concurrency::MaxAttemptsError
  # All retries exhausted
  nil
end

#switch_provider(reason = "manual_switch", context = {}) ⇒ Object

Switch to next available provider with sophisticated fallback logic



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# File 'lib/aidp/harness/provider_manager.rb', line 90

def switch_provider(reason = "manual_switch", context = {})
  old_provider = current_provider
  Aidp.logger.info("provider_manager", "Attempting provider switch", reason: reason, current: old_provider, **context)

  # Get fallback chain for current provider
  provider_fallback_chain = fallback_chain(old_provider)

  # Find next healthy provider in fallback chain
  next_provider = find_next_healthy_provider(provider_fallback_chain, old_provider)

  if next_provider
    success = set_current_provider(next_provider, reason, context)
    if success
      log_provider_switch(old_provider, next_provider, reason, context)
      Aidp.logger.info("provider_manager", "Provider switched successfully", from: old_provider, to: next_provider, reason: reason)
      return next_provider
    else
      Aidp.logger.warn("provider_manager", "Failed to switch to provider", provider: next_provider, reason: reason)
    end
  end

  # If no provider in fallback chain, try load balancing
  if @load_balancing_enabled
    next_provider = select_provider_by_load_balancing
    if next_provider
      success = set_current_provider(next_provider, reason, context)
      if success
        log_provider_switch(old_provider, next_provider, reason, context)
        return next_provider
      end
    end
  end

  # Last resort: try any available provider
  next_provider = find_any_available_provider
  if next_provider
    # Only attempt switch if it's actually a different provider
    if next_provider != old_provider
      success = set_current_provider(next_provider, reason, context)
      if success
        log_provider_switch(old_provider, next_provider, reason, context)
        return next_provider
      end
    else
      # Same provider - no switch possible
      Aidp.logger.debug("provider_manager", "Only provider available is current provider", provider: next_provider)
    end
  end

  # No providers available
  log_no_providers_available(reason, context)
  Aidp.logger.error("provider_manager", "No providers available for fallback", reason: reason, provider: old_provider)
  nil
end

#switch_provider_for_error(error_type, error_details = {}) ⇒ Object

Switch provider for specific error type



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# File 'lib/aidp/harness/provider_manager.rb', line 146

def switch_provider_for_error(error_type, error_details = {})
  Aidp.logger.warn("provider_manager", "Error triggered provider switch", error_type: error_type, **error_details)

  case error_type
  when "rate_limit"
    switch_provider("rate_limit", error_details)
  when "resource_exhausted", "quota_exceeded"
    # Treat capacity/resource exhaustion like rate limit for fallback purposes
    Aidp.logger.warn("provider_manager", "Resource/quota exhaustion detected", classified_from: error_type)
    switch_provider("rate_limit", error_details.merge(classified_from: error_type))
  when "empty_response"
    # Empty response indicates provider failure, try next provider
    Aidp.logger.warn("provider_manager", "Empty response from provider", classified_from: error_type)
    switch_provider("provider_failure", error_details.merge(classified_from: error_type))
  when "provider_error"
    # Generic provider error, try next provider
    Aidp.logger.warn("provider_manager", "Provider error detected", classified_from: error_type)
    switch_provider("provider_failure", error_details.merge(classified_from: error_type))
  when "authentication"
    switch_provider("authentication_error", error_details)
  when "network"
    switch_provider("network_error", error_details)
  when "server_error"
    switch_provider("server_error", error_details)
  when "timeout"
    switch_provider("timeout", error_details)
  else
    switch_provider("error", {error_type: error_type}.merge(error_details))
  end
end

#switch_provider_with_retry(reason = "retry", max_retries = @max_retries) ⇒ Object

Switch provider with retry logic



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# File 'lib/aidp/harness/provider_manager.rb', line 178

def switch_provider_with_retry(reason = "retry", max_retries = @max_retries)
  attempt_count = 0

  Aidp::Concurrency::Backoff.retry(
    max_attempts: max_retries,
    base: 0.5,
    strategy: :exponential,
    jitter: 0.2,
    on: [StandardError]
  ) do
    attempt_count += 1
    next_provider = switch_provider(reason, {retry_count: attempt_count - 1})

    if next_provider
      return next_provider
    else
      # Raise to trigger retry
      raise "Provider switch failed on attempt #{attempt_count}"
    end
  end
rescue Aidp::Concurrency::MaxAttemptsError
  # All retries exhausted
  nil
end

#update_model_health(provider_name, model_name, event, _details = {}) ⇒ Object

Update model health



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# File 'lib/aidp/harness/provider_manager.rb', line 755

def update_model_health(provider_name, model_name, event, _details = {})
  @model_health[provider_name] ||= {}
  @model_health[provider_name][model_name] ||= {
    status: "healthy",
    last_updated: Time.now,
    error_count: 0,
    success_count: 0,
    circuit_breaker_open: false,
    circuit_breaker_opened_at: nil
  }

  health = @model_health[provider_name][model_name]
  health[:last_updated] = Time.now

  case event
  when "success"
    health[:success_count] += 1
    health[:error_count] = [health[:error_count] - 1, 0].max # Decay errors
    health[:status] = "healthy"

    # Reset circuit breaker on success
    if health[:circuit_breaker_open]
      reset_model_circuit_breaker(provider_name, model_name)
    end

  when "error"
    health[:error_count] += 1

    # Check if circuit breaker should open
    if health[:error_count] >= @circuit_breaker_threshold
      open_model_circuit_breaker(provider_name, model_name)
    end

    # Mark as unhealthy if too many errors
    if health[:error_count] > @circuit_breaker_threshold * 2
      health[:status] = "unhealthy"
    end

  when "switched_to"
    # Model was selected, update last used
    health[:last_used] = Time.now

  when "rate_limited"
    # Rate limiting doesn't affect health status
    health[:last_rate_limited] = Time.now
  end
end

#update_provider_health(provider_name, event, _details = {}) ⇒ Object

Update provider health



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# File 'lib/aidp/harness/provider_manager.rb', line 866

def update_provider_health(provider_name, event, _details = {})
  @provider_health[provider_name] ||= {
    status: "healthy",
    last_updated: Time.now,
    error_count: 0,
    success_count: 0,
    circuit_breaker_open: false,
    circuit_breaker_opened_at: nil
  }

  health = @provider_health[provider_name]
  health[:last_updated] = Time.now

  case event
  when "success"
    health[:success_count] += 1
    health[:error_count] = [health[:error_count] - 1, 0].max # Decay errors
    health[:status] = "healthy"

    # Reset circuit breaker on success
    if health[:circuit_breaker_open]
      reset_circuit_breaker(provider_name)
    end

  when "error"
    health[:error_count] += 1

    # Check if circuit breaker should open
    if health[:error_count] >= @circuit_breaker_threshold
      open_circuit_breaker(provider_name)
    end

    # Mark as unhealthy if too many errors
    if health[:error_count] > @circuit_breaker_threshold * 2
      health[:status] = "unhealthy"
    end

  when "switched_to"
    # Provider was selected, update last used
    health[:last_used] = Time.now

  when "rate_limited"
    # Rate limiting doesn't affect health status
    health[:last_rate_limited] = Time.now
  end
end

#update_sticky_session(provider_name) ⇒ Object

Update sticky session



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# File 'lib/aidp/harness/provider_manager.rb', line 1379

def update_sticky_session(provider_name)
  @sticky_sessions[provider_name] = Time.now
end