Module: Legion::LLM::API::Native::Tiers

Extended by:
Legion::Logging::Helper
Defined in:
lib/legion/llm/api/native/tiers.rb

Constant Summary collapse

CAPABILITY_NAMES_BY_OPERATION =

Legacy display names for operations (the v0.15.2 capabilities display vocabulary used by the tier/offerings surfaces).

{
  chat: :completion, stream_chat: :streaming, embed: :embedding, image: :image,
  transcribe: :audio_transcription, translate: :audio_transcription, speak: :audio_speech,
  moderate: :moderation
}.freeze

Class Method Summary collapse

Class Method Details

.build_model_entry(lane) ⇒ Object 



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# File 'lib/legion/llm/api/native/tiers.rb', line 224

def self.build_model_entry(lane)
  {
    id:           lane.model.to_s,
    offering_id:  lane.lane_id,
    type:         lane_type(lane).to_s,
    capabilities: lane_capabilities(lane),
    limits:       lane_limits(lane),
    enabled:      true,
    cost:         {},
    model_family: lane.metadata[:model_family]&.to_s
  }.compact
end

.build_tiers_tree ⇒ Object

The tier tree is projected from the Registry snapshot (model_catalog.rb is the in-repo precedent). Instance-level health display derives from the instance's AvailabilityFact — the same fact the provider actors copy into the settings health hash — because the tree is keyed by the derived instance id, which the settings hash (keyed by config name) cannot address. The AvailabilityFact remains the routing authority; this is display.



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# File 'lib/legion/llm/api/native/tiers.rb', line 179

def self.build_tiers_tree
  snapshot = Legion::LLM::Inventory.snapshot
  inst_by_key = {}
  snapshot.each_instance { |inst| inst_by_key[inst.instance_key] = inst }

  grouped = {}
  snapshot.each_lane do |lane|
    # Compliance-by-absence: denied models never appear in the tier
    # view (same policy as the offerings surface).
    next unless Legion::LLM::API::Native::Offerings.policy_permits?(lane)

    ik = lane.instance_key
    tier_name = lane.tier.to_s
    provider_name = ik.provider_family.to_s
    instance_name = ik.instance_id.to_s

    grouped[tier_name] ||= { available: Legion::LLM::Router.tier_available?(tier_name.to_sym), providers: {} }
    grouped[tier_name][:providers][provider_name] ||= { instances: {} }
    grouped[tier_name][:providers][provider_name][:instances][instance_name] ||= {
      health:       instance_health_display(inst_by_key[ik]&.availability),
      capabilities: [],
      models:       []
    }

    inst = grouped[tier_name][:providers][provider_name][:instances][instance_name]
    inst[:capabilities] = (inst[:capabilities] + lane_capabilities(lane)).uniq.sort
    inst[:models] << build_model_entry(lane)
  end

  # Sort tiers by priority order. Router.tier_priority yields symbols;
  # the tree is keyed by tier Strings, so normalize to avoid duplicate
  # (symbol + string) keys for the same tier.
  priority = Legion::LLM::Router.tier_priority.map(&:to_s)
  sorted = {}
  priority.each { |t| sorted[t] = grouped.delete(t) if grouped.key?(t) }
  grouped.each { |t, v| sorted[t] = v }

  # Ensure all priority tiers appear even if empty
  priority.each do |t|
    sorted[t] ||= { available: Legion::LLM::Router.tier_available?(t.to_sym), providers: {} }
  end

  sorted
end

.instance_health_display(availability) ⇒ Object

Legacy response shape: a single circuit-state string per instance.



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# File 'lib/legion/llm/api/native/tiers.rb', line 238

def self.instance_health_display(availability)
  case availability&.state
  when :available then 'closed'
  when :unavailable then 'open'
  else 'unknown'
  end
end

.lane_capabilities(lane) ⇒ Object

The lane's display capabilities: the representative operation's legacy display name plus every supported capability the provider published as evidence.



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# File 'lib/legion/llm/api/native/tiers.rb', line 249

def self.lane_capabilities(lane)
  caps = [CAPABILITY_NAMES_BY_OPERATION.fetch(lane.operation, lane.operation)]
  lane.capability_evidence.each do |capability, evidence|
    caps << capability if evidence.status == :supported
  end
  caps.map(&:to_s)
end

.lane_limits(lane) ⇒ Object 



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# File 'lib/legion/llm/api/native/tiers.rb', line 257

def self.lane_limits(lane)
  limits = {}
  limits[:context_window] = lane.context_evidence.value if lane.context_evidence.known?
  limits[:max_output_tokens] = lane.max_output_evidence.value if lane.max_output_evidence.known?
  limits
end

.lane_type(lane) ⇒ Object 



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# File 'lib/legion/llm/api/native/tiers.rb', line 264

def self.lane_type(lane)
  Legion::Extensions::Llm::Taxonomies.lane_type_for(operation: lane.operation)
end

.registered(app) ⇒ Object

rubocop:disable Metrics/AbcSize



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# File 'lib/legion/llm/api/native/tiers.rb', line 14

def self.registered(app) # rubocop:disable Metrics/AbcSize
  log.debug('[llm][api][tiers] registering tier routes')

  app.get '/api/llm/tiers' do
    require_llm!

    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    json_response({
                    tiers:        tiers_data,
                    priority:     Legion::LLM::Router.tier_priority,
                    privacy_mode: Legion::LLM::Router.privacy_mode?
                  })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.list')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier' do
    require_llm!

    tier_name = params[:tier].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    json_response({ tier: tier_name, **tier })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.get')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier/providers' do
    require_llm!

    tier_name = params[:tier].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    json_response({ tier: tier_name, providers: tier[:providers] })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.providers')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier/providers/:provider' do
    require_llm!

    tier_name = params[:tier].to_s
    provider_name = params[:provider].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    provider = tier.dig(:providers, provider_name)
    halt json_error('provider_not_found', "Provider '#{provider_name}' not found in tier '#{tier_name}'", status_code: 404) unless provider

    json_response({ tier: tier_name, provider: provider_name, **provider })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.provider')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier/providers/:provider/instances' do
    require_llm!

    tier_name = params[:tier].to_s
    provider_name = params[:provider].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    provider = tier.dig(:providers, provider_name)
    halt json_error('provider_not_found', "Provider '#{provider_name}' not found in tier '#{tier_name}'", status_code: 404) unless provider

    json_response({ tier: tier_name, provider: provider_name, instances: provider[:instances] })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.instances')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier/providers/:provider/instances/:instance' do
    require_llm!

    tier_name = params[:tier].to_s
    provider_name = params[:provider].to_s
    instance_name = params[:instance].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    provider = tier.dig(:providers, provider_name)
    halt json_error('provider_not_found', "Provider '#{provider_name}' not found in tier '#{tier_name}'", status_code: 404) unless provider

    instance = provider.dig(:instances, instance_name)
    halt json_error('instance_not_found', "Instance '#{instance_name}' not found", status_code: 404) unless instance

    json_response({ tier: tier_name, provider: provider_name, instance: instance_name, **instance })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.instance')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier/providers/:provider/instances/:instance/models' do
    require_llm!

    tier_name = params[:tier].to_s
    provider_name = params[:provider].to_s
    instance_name = params[:instance].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    provider = tier.dig(:providers, provider_name)
    halt json_error('provider_not_found', "Provider '#{provider_name}' not found in tier '#{tier_name}'", status_code: 404) unless provider

    instance = provider.dig(:instances, instance_name)
    halt json_error('instance_not_found', "Instance '#{instance_name}' not found", status_code: 404) unless instance

    json_response({ tier: tier_name, provider: provider_name, instance: instance_name, models: instance[:models] })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.instance_models')
    json_error('tiers_error', e.message, status_code: 500)
  end

  app.get '/api/llm/tiers/:tier/providers/:provider/models' do
    require_llm!

    tier_name = params[:tier].to_s
    provider_name = params[:provider].to_s
    tiers_data = Legion::LLM::API::Native::Tiers.build_tiers_tree
    tier = tiers_data[tier_name]
    halt json_error('tier_not_found', "Tier '#{tier_name}' not found", status_code: 404) unless tier

    provider = tier.dig(:providers, provider_name)
    halt json_error('provider_not_found', "Provider '#{provider_name}' not found in tier '#{tier_name}'", status_code: 404) unless provider

    all_models = provider[:instances].values.flat_map { |inst| inst[:models] }
    seen = {}
    unique_models = all_models.select { |m| seen[m[:id]] ? false : (seen[m[:id]] = true) }

    json_response({ tier: tier_name, provider: provider_name, models: unique_models })
  rescue StandardError => e
    handle_exception(e, level: :error, handled: true, operation: 'llm.api.tiers.provider_models')
    json_error('tiers_error', e.message, status_code: 500)
  end

  log.debug('[llm][api][tiers] tier routes registered')
end