Module: Legion::Extensions

Defined in:
lib/legion/extensions.rb,
lib/legion/extensions/core.rb,
lib/legion/extensions/data.rb,
lib/legion/extensions/handle.rb,
lib/legion/extensions/catalog.rb,
lib/legion/extensions/absorbers.rb,
lib/legion/extensions/transport.rb,
lib/legion/extensions/actors/dsl.rb,
lib/legion/extensions/capability.rb,
lib/legion/extensions/data/model.rb,
lib/legion/extensions/gem_source.rb,
lib/legion/extensions/hooks/base.rb,
lib/legion/extensions/actors/base.rb,
lib/legion/extensions/actors/loop.rb,
lib/legion/extensions/actors/once.rb,
lib/legion/extensions/actors/poll.rb,
lib/legion/extensions/definitions.rb,
lib/legion/extensions/helpers/lex.rb,
lib/legion/extensions/helpers/llm.rb,
lib/legion/extensions/permissions.rb,
lib/legion/extensions/actors/every.rb,
lib/legion/extensions/helpers/base.rb,
lib/legion/extensions/helpers/core.rb,
lib/legion/extensions/helpers/data.rb,
lib/legion/extensions/helpers/task.rb,
lib/legion/extensions/builders/base.rb,
lib/legion/extensions/data/migrator.rb,
lib/legion/extensions/helpers/cache.rb,
lib/legion/extensions/absorbers/base.rb,
lib/legion/extensions/actors/nothing.rb,
lib/legion/extensions/builders/hooks.rb,
lib/legion/extensions/helpers/logger.rb,
lib/legion/extensions/helpers/secret.rb,
lib/legion/extensions/actors/defaults.rb,
lib/legion/extensions/builders/actors.rb,
lib/legion/extensions/builders/routes.rb,
lib/legion/extensions/builders/skills.rb,
lib/legion/extensions/handle_registry.rb,
lib/legion/extensions/actors/singleton.rb,
lib/legion/extensions/builders/helpers.rb,
lib/legion/extensions/builders/runners.rb,
lib/legion/extensions/catalog/registry.rb,
lib/legion/extensions/helpers/segments.rb,
lib/legion/extensions/catalog/available.rb,
lib/legion/extensions/helpers/knowledge.rb,
lib/legion/extensions/helpers/transport.rb,
lib/legion/extensions/absorbers/dispatch.rb,
lib/legion/extensions/actors/fingerprint.rb,
lib/legion/extensions/builders/absorbers.rb,
lib/legion/extensions/absorbers/transport.rb,
lib/legion/extensions/actors/retry_policy.rb,
lib/legion/extensions/actors/subscription.rb,
lib/legion/extensions/absorbers/matchers/url.rb,
lib/legion/extensions/absorbers/matchers/base.rb,
lib/legion/extensions/absorbers/matchers/file.rb,
lib/legion/extensions/actors/absorber_dispatch.rb,
lib/legion/extensions/absorbers/pattern_matcher.rb

Defined Under Namespace

Modules: Absorbers, Actors, Builder, Catalog, Core, Data, Definitions, GemSource, Helpers, Hooks, Permissions, Transport Classes: Capability, Handle, HandleRegistry

Constant Summary collapse

SUBMODULE_SKIP = 
%i[VERSION Actor Actors Runners Helpers Transport Data].freeze
ACTOR_TYPE_MAP = 
{
  Once:         :once,
  Poll:         :poll,
  Every:        :every,
  Loop:         :loop,
  Subscription: :subscription
}.freeze

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.local_tasks ⇒ Object (readonly)

Returns the value of attribute local_tasks.



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# File 'lib/legion/extensions.rb', line 55

def local_tasks
  @local_tasks
end

Class Method Details

.agentic_allowed?(gem_name, config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 1257

def agentic_allowed?(gem_name, config)
  return true if config[:allowed].nil?

  Array(config[:allowed]).any? { |pat| File.fnmatch(pat, gem_name) }
end

.agentic_blocked?(gem_name, config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 1253

def agentic_blocked?(gem_name, config)
  Array(config[:blocked]).any? { |pat| File.fnmatch(pat, gem_name) }
end

.agentic_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 853

def agentic_extension_names
  known_gem_names = (
    core_extension_names + service_extension_names + other_extension_names +
      ai_extension_names + legacy_ai_extension_names
  ).map { |n| "lex-#{n}" }
  Array(@extensions).reject { |entry| known_gem_names.include?(entry[:gem_name]) }.map { |entry| entry[:gem_name] }
end

.ai_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 815

def ai_extension_names
  native_llm_extension_names
end

.allowed_gem_names_for_profile(profile, role) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1158

def allowed_gem_names_for_profile(profile, role)
  case profile
  when :core      then lex_prefix(core_extension_names)
  when :cognitive then lex_prefix(core_extension_names + agentic_extension_names)
  when :service   then lex_prefix(core_extension_names + service_extension_names + other_extension_names)
  when :dev       then lex_prefix(core_extension_names + ai_extension_names + dev_agentic_names)
  when :custom    then lex_prefix(Array(role[:extensions]).map(&:to_s))
  end
end

.apply_role_filter ⇒ Object 



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# File 'lib/legion/extensions.rb', line 797

def apply_role_filter
  role = Legion::Settings[:role]
  return if role.nil? || role[:profile].nil?

  profile = role[:profile].to_sym
  allowed = allowed_gem_names_for_profile(profile, role)
  return if allowed.nil?

  before = @extensions.count
  @extensions.select! { |entry| allowed.include?(entry[:gem_name]) }
  Legion::Logging.info "Role profile :#{profile} filtered #{before} -> #{@extensions.count} extensions"
end

.before_llm_extension_phase?(phase_num) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 395

def before_llm_extension_phase?(phase_num)
  phase_num.is_a?(Numeric) && phase_num < 1
end

.build_extension_entry(gem_name, category, categories, nesting:) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1198

def build_extension_entry(gem_name, category, categories, nesting:)
  segments = Helpers::Segments.derive_segments(gem_name)
  tier     = category == :default ? 5 : (categories.dig(category, :tier) || 5)

  # Multi-segment gem names: check if the gem actually uses nested directories
  # (e.g. lex-agentic-memory -> agentic/memory/) or flat underscored naming
  # (e.g. lex-swarm-github -> swarm_github.rb). Probe the gem's lib/ to decide.
  nesting = true if segments.length > 1
  nesting = probe_nesting(gem_name, segments) if nesting && segments.length > 1

  if nesting
    const_path   = Helpers::Segments.derive_const_path(gem_name)
    require_path = Helpers::Segments.derive_require_path(gem_name)
  else
    flat_name    = gem_name.delete_prefix('lex-').tr('-', '_')
    const_path   = "Legion::Extensions::#{flat_name.split('_').map(&:capitalize).join}"
    require_path = "legion/extensions/#{flat_name}"
  end

  { gem_name: gem_name, category: category, tier: tier,
    segments: segments, const_path: const_path, require_path: require_path,
    settings_path: settings_path_for_entry(segments, nesting) }
end

.categorize_and_order(gem_names) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 861

def categorize_and_order(gem_names)
  ext_settings = ::Legion::Settings[:extensions] || {}
  categories   = ext_settings[:categories] || default_category_registry
  lists        = {
    identity: Array(ext_settings[:identity]),
    core:     Array(ext_settings[:core]),
    ai:       Array(ext_settings[:ai]),
    gaia:     Array(ext_settings[:gaia])
  }
  ctx = {
    blocked:     Array(ext_settings[:blocked]),
    agentic_cfg: ext_settings[:agentic] || {},
    categories:  categories,
    gem_set:     gem_names.to_set,
    ordered:     [],
    claimed:     Set.new
  }

  collect_list_category_gems(lists, ctx)
  collect_prefix_category_gems(gem_names, ctx)

  (gem_names.to_a - ctx[:claimed].to_a - ctx[:blocked]).sort.each do |gn|
    ctx[:ordered] << build_extension_entry(gn, :default, categories, nesting: false)
  end

  ctx[:ordered]
end

.check_reserved_words(gem_name, known_org: true) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 889

def check_reserved_words(gem_name, known_org: true)
  return if known_org

  bare          = gem_name.delete_prefix('lex-')
  first_segment = bare.split('-').first

  configured_prefixes = begin
    Array(::Legion::Settings.dig(:extensions, :reserved_prefixes))
  rescue StandardError => e
    Legion::Logging.debug "Extensions#check_reserved_words failed to read reserved_prefixes: #{e.message}" if defined?(Legion::Logging)
    []
  end
  reserved_prefixes = configured_prefixes.empty? ? %w[core ai agentic gaia identity] : configured_prefixes

  configured_words = begin
    Array(::Legion::Settings.dig(:extensions, :reserved_words))
  rescue StandardError => e
    Legion::Logging.debug "Extensions#check_reserved_words failed to read reserved_words: #{e.message}" if defined?(Legion::Logging)
    []
  end
  reserved_words = configured_words.empty? ? %w[transport cache crypt data settings json logging llm rbac legion] : configured_words

  if reserved_prefixes.include?(first_segment)
    ::Legion::Logging.warn(
      "#{gem_name} uses reserved prefix '#{first_segment}' — " \
      "it will be loaded in the #{first_segment} category namespace"
    )
  elsif reserved_words.include?(first_segment)
    ::Legion::Logging.warn(
      "#{gem_name} uses reserved word '#{first_segment}' as its first segment — " \
      'this may shadow framework modules'
    )
  end
end

.collect_list_category_gems(lists, ctx) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1168

def collect_list_category_gems(lists, ctx)
  lists.sort_by { |cat, _| ctx[:categories].dig(cat, :tier) || 99 }.each do |cat_name, gem_list|
    gem_list.each do |gn|
      next unless ctx[:gem_set].include?(gn)
      next if ctx[:blocked].include?(gn)

      ctx[:ordered] << build_extension_entry(gn, cat_name, ctx[:categories], nesting: false)
      ctx[:claimed].add(gn)
    end
  end
end

.collect_prefix_category_gems(gem_names, ctx) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1180

def collect_prefix_category_gems(gem_names, ctx)
  prefix_cats = ctx[:categories].select { |_, v| v[:type].to_s == 'prefix' }
                                .sort_by { |_, v| v[:tier] || 99 }
                                .to_h
  prefix_cats.each_key do |cat_name|
    prefix  = "lex-#{cat_name}-"
    matched = gem_names.select { |gn| gn.start_with?(prefix) && !ctx[:claimed].include?(gn) }.sort
    matched.each do |gn|
      next if ctx[:blocked].include?(gn)
      next if cat_name == :agentic && agentic_blocked?(gn, ctx[:agentic_cfg])
      next if cat_name == :agentic && !agentic_allowed?(gn, ctx[:agentic_cfg])

      ctx[:ordered] << build_extension_entry(gn, cat_name, ctx[:categories], nesting: true)
      ctx[:claimed].add(gn)
    end
  end
end

.core_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 810

def core_extension_names
  %w[codegen conditioner exec health lex log metering node ping scheduler tasker task_pruner telemetry
     transformer].freeze
end

.default_category_registry ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1243

def default_category_registry
  {
    identity: { type: :prefix, tier: 0, phase: 0 },
    core:     { type: :list,   tier: 1, phase: 1 },
    ai:       { type: :list,   tier: 2, phase: 1 },
    gaia:     { type: :list,   tier: 3, phase: 1 },
    agentic:  { type: :prefix, tier: 4, phase: 1 }
  }
end

.dev_agentic_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 848

def dev_agentic_names
  %w[attention coldstart curiosity dream empathy flow habit memory metacognition mood narrator personality
     reflection salience temporal tick volition].freeze
end

.dispatch_allowed?(lex_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 962

def dispatch_allowed?(lex_name)
  extension_handle_registry.dispatch_allowed?(normalize_lex_name(lex_name))
end

.dispatch_allowed_for_runner?(runner_class) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 966

def dispatch_allowed_for_runner?(runner_class)
  lex_name = lex_name_for_runner_class(runner_class)
  return true unless lex_name

  dispatch_allowed?(lex_name)
end

.ensure_namespace(const_path) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 780

def ensure_namespace(const_path)
  parts   = const_path.split('::')
  current = ::Legion::Extensions
  parts[2...-1].each do |part|
    current.const_set(part, Module.new) unless current.const_defined?(part, false)
    current = current.const_get(part, false)
  end
end

.extension_handle(name) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 942

def extension_handle(name)
  extension_handle_registry.fetch(name)
end

.extension_handle_registry ⇒ Object 



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# File 'lib/legion/extensions.rb', line 999

def extension_handle_registry
  @extension_handle_registry ||= HandleRegistry.new
end

.extension_handles ⇒ Object 



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# File 'lib/legion/extensions.rb', line 938

def extension_handles
  extension_handle_registry.all
end

.extract_llm_extension_entries!(phases) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 407

def extract_llm_extension_entries!(phases)
  base_entries = []
  extension_entries = []

  phases.each do |(_, entries)|
    entries.delete_if do |entry|
      next false unless llm_extension_entry?(entry)

      if llm_base_extension_entry?(entry)
        base_entries << entry
      else
        extension_entries << entry
      end
      true
    end
  end
  phases.reject! { |_, entries| entries.empty? }

  [base_entries, extension_entries]
end

.find_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 924

def find_extensions
  return @extensions if @extensions

  all_specs  = gem_names_for_discovery
  lex_names  = all_specs.select { |s| s[:name].start_with?('lex-') }.map { |s| s[:name] }
  @extensions = categorize_and_order(lex_names)
  apply_role_filter
  @extensions
end

.flush_pending_registrations! ⇒ Object 



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# File 'lib/legion/extensions.rb', line 120

def flush_pending_registrations!
  return if @pending_registrations.nil? || @pending_registrations.empty?

  registrations = @pending_registrations
  @pending_registrations = nil

  # Collect all runner hashes into a single batch payload
  batch = registrations.map(&:opts).compact
  count = batch.size
  return if count.zero?

  Legion::Transport::Messages::LexRegister.new(
    function: 'save',
    opts:     batch
  ).publish

  Legion::Logging.info "[Extensions] flushed #{count} pending registrations (batched)"
rescue StandardError => e
  Legion::Logging.warn "[Extensions] batch flush failed: #{e.message}"
end

.gem_load(entry) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 763

def gem_load(entry)
  gem_name     = entry[:gem_name]
  require_path = entry[:require_path]
  spec         = Gem::Specification.find_by_name(gem_name)
  gem_dir      = spec.gem_dir
  entry[:spec] = spec
  entry[:version] = spec.version.to_s
  require "#{gem_dir}/lib/#{require_path}"
  true
rescue Gem::MissingSpecError => e
  Legion::Logging.warn "#{gem_name} gem not found: #{e.message}"
  nil
rescue LoadError => e
  Legion::Logging.warn "#{gem_name} failed to load: #{e.message}"
  nil
end

.gem_names_for_discovery ⇒ Object 



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# File 'lib/legion/extensions.rb', line 789

def gem_names_for_discovery
  if defined?(Bundler)
    Bundler.load.specs.map { |s| { name: s.name, version: s.version.to_s } }
  else
    Gem::Specification.latest_specs.map { |s| { name: s.name, version: s.version.to_s } }
  end
end

.group_by_phase ⇒ Object 



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# File 'lib/legion/extensions.rb', line 376

def group_by_phase
  settings_cats = ::Legion::Settings.dig(:extensions, :categories) || {}
  categories = default_category_registry.merge(settings_cats)
  default_phase = 1

  @extensions.group_by do |entry|
    cat = entry[:category]
    categories.dig(cat, :phase) || default_phase
  end.sort_by(&:first)
end

.group_pending_actors ⇒ Object 



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# File 'lib/legion/extensions.rb', line 436

def group_pending_actors
  groups = { once: [], poll: [], every: [], loop: [], subscription: [] }
  @pending_actors.each do |actor|
    type = resolve_actor_type(actor[:actor_class])
    groups[type] << actor
  end
  groups
end

.hook_actor(extension:, extension_name:, actor_class:, size: 1, **opts) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 454

def hook_actor(extension:, extension_name:, actor_class:, size: 1, **opts)
  ext_settings = extension_settings_for_actor(extension_name, opts[:settings_path])
  size = if ext_settings.is_a?(Hash) && ext_settings.key?(:workers)
           ext_settings[:workers]
         elsif size.is_a? Integer
           size
         else
           1
         end

  extension_hash = {
    extension:       extension,
    extension_name:  extension_name,
    actor_class:     actor_class,
    size:            size,
    fallback_policy: :abort,
    **opts
  }
  extension_hash[:running_class] = if actor_class.ancestors.include? Legion::Extensions::Actors::Subscription
                                     actor_class
                                   else
                                     actor_class.new
                                   end

  return if extension_hash[:running_class].respond_to?(:enabled?) && !extension_hash[:running_class].enabled?

  if actor_class.ancestors.include? Legion::Extensions::Actors::Every
    @timer_tasks.push(extension_hash)
    @running_instances << extension_hash[:running_class]
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Once
    @once_tasks.push(extension_hash)
    @running_instances << extension_hash[:running_class]
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Loop
    @loop_tasks.push(extension_hash)
    @running_instances << extension_hash[:running_class]
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Poll
    @poll_tasks.push(extension_hash)
    @running_instances << extension_hash[:running_class]
  elsif actor_class.ancestors.include? Legion::Extensions::Actors::Subscription
    hook_subscription_actors_pooled([extension_hash])
  else
    Legion::Logging.fatal "#{actor_class} did not match any actor classes (ancestors: #{actor_class.ancestors.first(5).map(&:to_s)})"
  end
end

.hook_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 19

def hook_extensions
  @timer_tasks = []
  @loop_tasks = []
  @once_tasks = []
  @poll_tasks = []
  @subscription_tasks = []
  @local_tasks = []
  @actors = []
  @running_instances = Concurrent::Array.new
  @loaded_extensions = []
  reset_runtime_handles!
  @pending_registrations = Concurrent::Array.new

  find_extensions

  phases = group_by_phase
  llm_base_entries, llm_extension_entries = extract_llm_extension_entries!(phases)
  llm_phases_loaded = false
  phases.each do |phase_num, entries|
    unless llm_phases_loaded || before_llm_extension_phase?(phase_num)
      load_llm_extension_phases(llm_base_entries, llm_extension_entries)
      llm_phases_loaded = true
    end

    @pending_actors = Concurrent::Array.new
    load_phase_extensions(phase_num, entries)
    hook_phase_actors(phase_num)
  end
  load_llm_extension_phases(llm_base_entries, llm_extension_entries) unless llm_phases_loaded

  transition_loaded_extensions(:running)
  Catalog.flush_persisted_transitions

  load_yaml_agents
end

.hook_phase_actors(phase_num) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 197

def hook_phase_actors(phase_num)
  return if @pending_actors.nil? || @pending_actors.empty?

  Legion::Logging.info "Phase #{phase_num}: hooking #{@pending_actors.size} deferred actors"

  groups = group_pending_actors

  %i[once poll every loop].each do |type|
    next if groups[type].empty?

    groups[type].each { |actor| hook_actor(**actor) }
  end

  hook_subscription_actors_pooled(groups[:subscription]) unless groups[:subscription].empty?

  dispatch_local_actors(@local_tasks) unless @local_tasks.empty?

  @pending_actors.clear
end

.legacy_ai_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 835

def legacy_ai_extension_names
  %w[azure-ai bedrock claude foundry gemini ollama openai xai].freeze
end

.lex_prefix(names) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1154

def lex_prefix(names)
  names.map { |n| n.start_with?('lex-') ? n : "lex-#{n}" }
end

.llm_base_extension_entry?(entry) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 432

def llm_base_extension_entry?(entry)
  entry[:gem_name] == 'lex-llm'
end

.llm_extension_entry?(entry) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/extensions.rb', line 428

def llm_extension_entry?(entry)
  llm_base_extension_entry?(entry) || entry[:gem_name].start_with?('lex-llm-')
end

.load_extension(entry) ⇒ Object

rubocop:disable Metrics/PerceivedComplexity, Metrics/CyclomaticComplexity, Metrics/AbcSize, Metrics/MethodLength



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# File 'lib/legion/extensions.rb', line 257

def load_extension(entry) # rubocop:disable Metrics/PerceivedComplexity, Metrics/CyclomaticComplexity, Metrics/AbcSize, Metrics/MethodLength
  ensure_namespace(entry[:const_path]) if entry[:segments].length > 1
  return unless gem_load(entry)

  extension = Kernel.const_get(entry[:const_path])
  extension.extend Legion::Extensions::Core unless extension.singleton_class.include?(Legion::Extensions::Core)

  ext_name = entry[:segments].join('_')
  ext_settings = extension_settings_for_entry(entry)
  min_version = ext_settings[:min_version] if ext_settings.is_a?(Hash)
  if min_version.is_a?(String)
    begin
      gem_spec = Gem::Specification.find_by_name(entry[:gem_name])
      if Gem::Version.new(gem_spec.version.to_s) < Gem::Version.new(min_version)
        Legion::Logging.warn "#{entry[:gem_name]} v#{gem_spec.version} below min_version #{min_version}, skipping"
        return false
      end
    rescue Gem::MissingSpecError
      Legion::Logging.warn "Could not find gem spec for #{entry[:gem_name]}, skipping min_version check"
    end
  end

  if extension.data_required? && Legion::Settings[:data][:connected] == false
    Legion::Logging.warn "#{ext_name} requires Legion::Data but isn't enabled, skipping"
    return false
  end

  if extension.cache_required? && Legion::Settings[:cache][:connected] == false
    Legion::Logging.warn "#{ext_name} requires Legion::Cache but isn't enabled, skipping"
    return false
  end

  if extension.crypt_required? && Legion::Settings[:crypt][:cs].nil?
    Legion::Logging.warn "#{ext_name} requires Legion::Crypt but isn't ready, skipping"
    return false
  end

  if extension.vault_required? && Legion::Settings[:crypt][:vault][:connected] == false
    Legion::Logging.warn "#{ext_name} requires Legion::Crypt::Vault but isn't enabled, skipping"
    return false
  end

  if extension.llm_required? && (Legion::Settings[:llm].nil? || Legion::Settings[:llm][:connected] == false)
    Legion::Logging.warn "#{ext_name} requires Legion::LLM but isn't enabled, skipping"
    return false
  end

  if extension.respond_to?(:skills_required?) && extension.skills_required? &&
     !Object.const_defined?('Legion::LLM::Skills', false)
    Legion::Logging.warn "#{ext_name} requires Legion::LLM::Skills but isn't loaded, skipping"
    return false
  end

  has_logger = extension.respond_to?(:log)
  extension.autobuild

  register_capabilities(entry[:gem_name], extension.runners) if extension.respond_to?(:runners)
  write_lex_cli_manifest(entry, extension)
  register_absorber_capabilities(entry[:gem_name], extension.absorbers) if extension.respond_to?(:absorbers)

  if extension.respond_to?(:meta_actors) && extension.meta_actors.is_a?(Hash)
    extension.meta_actors.each_value do |actor|
      extension.log.debug("deferring meta actor: #{actor}") if has_logger
      @pending_actors << actor
    end
  end

  extension.actors.each_value do |actor|
    extension.log.debug("deferring literal actor: #{actor}") if has_logger
    @pending_actors << actor
  end

  autobuild_submodules(extension, has_logger)
  extension.log.info "Loaded v#{extension::VERSION}"
  Legion::Events.emit('extension.loaded', name: ext_name, version: entry[:gem_name])

  require 'legion/transport/messages/lex_register'
  registration = Legion::Transport::Messages::LexRegister.new(function: 'save', opts: extension.runners)
  if @pending_registrations
    @pending_registrations << registration
  else
    registration.publish
  end

  begin
    if defined?(Legion::Data) && defined?(Legion::Data::Model::DigitalWorker)
      worker_id = "lex-#{ext_name}"
      worker = Legion::Data::Model::DigitalWorker.find_or_create(worker_id: worker_id) do |w|
        w.name            = ext_name
        w.extension_name  = ext_name
        w.lifecycle_state = 'active'
        w.risk_tier       = 'low'
        w.team            = 'extensions'
        w.consent_tier    = 'supervised'
        w.entra_app_id    = worker_id
        w.owner_msid      = 'system'
      end
      worker.update(updated_at: Time.now) if worker.updated_at
    end
  rescue StandardError => e
    Legion::Logging.debug "Extensions#load_extension failed to register digital worker for #{ext_name}: #{e.message}" if defined?(Legion::Logging)
    nil
  end
  register_extension_handle(entry[:gem_name], spec: entry[:spec], state: :loaded, loaded_at: Time.now,
                                              latest_installed_version: latest_installed_version(entry[:gem_name]))
  true
rescue StandardError => e
  Legion::Logging.log_exception(e, lex: entry[:gem_name], component_type: :boot)
  false
end

.load_extensions_parallel(eligible) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 217

def load_extensions_parallel(eligible)
  return if eligible.empty?

  if defined?(Legion::Transport::Connection) && Legion::Transport::Connection.respond_to?(:open_build_session)
    Legion::Transport::Connection.open_build_session
  end

  max_threads = Legion::Settings.dig(:extensions, :parallel_pool_size) || 24
  pool_size = [eligible.count, max_threads].min
  executor = Concurrent::FixedThreadPool.new(pool_size)

  futures = eligible.map do |entry|
    Concurrent::Promises.future_on(executor, entry) do |e|
      Thread.current[:legion_build_session] = true
      load_extension(e) ? e : nil
    end
  end

  results = futures.map(&:value)

  executor.shutdown
  executor.wait_for_termination(30)

  if defined?(Legion::Transport::Connection) && Legion::Transport::Connection.respond_to?(:close_build_session)
    Legion::Transport::Connection.close_build_session
  end

  results.each_with_index do |result, idx|
    if result
      Catalog.transition(result[:gem_name], :loaded)
      transition_extension_handle(result[:gem_name], :loaded)
      register_in_registry(gem_name: result[:gem_name], version: result[:version])
      @loaded_extensions.push(result[:gem_name])
    else
      transition_extension_handle(eligible[idx][:gem_name], :failed)
      Legion::Logging.warn("#{eligible[idx][:gem_name]} failed to load")
    end
  end
end

.load_llm_extension_phases(base_entries, extension_entries) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 387

def load_llm_extension_phases(base_entries, extension_entries)
  run_extension_phase(:llm_base, base_entries)

  Legion::Logging.warn 'lex-llm-* extensions discovered without lex-llm; provider loading may fail' if base_entries.empty? && extension_entries.any?

  run_extension_phase(:llm_extensions, extension_entries.sort_by { |entry| entry[:gem_name] })
end

.load_phase_extensions(phase_num, entries) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 169

def load_phase_extensions(phase_num, entries)
  eligible = entries.filter_map do |entry|
    gem_name = entry[:gem_name]
    ext_settings = extension_settings_for_entry(entry)

    if ext_settings.is_a?(Hash) && ext_settings.key?(:enabled) && !ext_settings[:enabled]
      Legion::Logging.info "Skipping #{gem_name} because it's disabled"
      next
    end

    Catalog.register(gem_name)
    register_extension_handle(gem_name, state:                    :registered,
                                        latest_installed_version: latest_installed_version(gem_name))
    entry
  end

  load_extensions_parallel(eligible)

  Legion::Logging.info(
    "Phase #{phase_num}: #{eligible.count} extensions loaded " \
    "(subscription:#{@subscription_tasks.count}," \
    "every:#{@timer_tasks.count}," \
    "poll:#{@poll_tasks.count}," \
    "once:#{@once_tasks.count}," \
    "loop:#{@loop_tasks.count})"
  )
end

.load_yaml_agents ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1018

def load_yaml_agents
  @load_yaml_agents ||= begin
    require 'legion/settings/agent_loader'
    dir = default_agents_directory
    definitions = Legion::Settings::AgentLoader.load_agents(dir)
    definitions.each { |d| d[:_runner_module] = generate_yaml_runner(d) }
    definitions
  rescue LoadError => e
    Legion::Logging.debug "Extensions#load_yaml_agents failed to load agent loader: #{e.message}" if defined?(Legion::Logging)
    []
  end
end

.loaded_extension_modules ⇒ Object 



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# File 'lib/legion/extensions.rb', line 737

def loaded_extension_modules
  handles = extension_handles
  active_names = handles.select(&:dispatchable?).map(&:lex_name)
  constants(false).filter_map do |const_name|
    mod = const_get(const_name, false)
    next nil unless mod.is_a?(Module) && mod.respond_to?(:runner_modules)
    next nil if handles.any? && !active_names.include?(module_lex_name(mod))

    mod
  rescue StandardError => e
    Legion::Logging.warn("[Extensions] loaded_extension_modules: #{e.message}") if defined?(Legion::Logging)
    nil
  end
end

.loaded_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 934

def loaded_extensions
  extension_handle_registry.loaded.map(&:lex_name)
end

.native_llm_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 819

def native_llm_extension_names
  %w[
    llm
    llm-anthropic
    llm-azure-foundry
    llm-bedrock
    llm-gemini
    llm-ledger
    llm-mlx
    llm-ollama
    llm-openai
    llm-vertex
    llm-vllm
  ].freeze
end

.other_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 843

def other_extension_names
  %w[chef elastic_app_search elasticsearch influxdb memcached pagerduty pushbullet pushover slack sleepiq smtp
     sonos ssh todoist twilio].freeze
end

.pause_actors ⇒ Object 



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# File 'lib/legion/extensions.rb', line 159

def pause_actors
  @running_instances&.each do |inst|
    timer = inst.instance_variable_get(:@timer)
    timer&.shutdown if timer.respond_to?(:shutdown)
  rescue StandardError => e
    Legion::Logging.error "pause_actors: #{e.class}: #{e.message}" if defined?(Legion::Logging)
  end
  Legion::Logging.warn 'All actors paused' if defined?(Legion::Logging)
end

.probe_nesting(gem_name, segments) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1230

def probe_nesting(gem_name, segments)
  gem_dir = Gem::Specification.find_by_name(gem_name).gem_dir
  nested_path = "#{gem_dir}/lib/legion/extensions/#{segments.join('/')}.rb"
  return true if File.exist?(nested_path)

  flat_path = "#{gem_dir}/lib/legion/extensions/#{segments.join('_')}.rb"
  return false if File.exist?(flat_path)

  true # default to nested if neither found
rescue Gem::MissingSpecError
  true
end

.record_extension_resource(lex_name, resource_type, value) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 973

def record_extension_resource(lex_name, resource_type, value)
  handle = extension_handle(lex_name) || register_extension_handle(normalize_lex_name(lex_name))
  values = Array(handle.public_send(resource_type))
  return handle if values.include?(value)

  update_extension_handle(handle.lex_name, resource_type => values + [value])
end

.refresh_llm_provider_registry(gem_name) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1003

def refresh_llm_provider_registry(gem_name)
  return unless gem_name.start_with?('lex-llm-') && gem_name != 'lex-llm-ledger'
  return unless defined?(Legion::LLM::Call::Providers)

  Legion::LLM::Call::Providers.rediscover_all_providers
end

.register_absorber_capabilities(_gem_name, _absorbers) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 759

def register_absorber_capabilities(_gem_name, _absorbers); end

.register_capabilities(_gem_name, _runners) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 761

def register_capabilities(_gem_name, _runners); end

.register_extension_handle(name, **attrs) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 946

def register_extension_handle(name, **attrs)
  extension_handle_registry.register(name, **attrs)
end

.register_in_registry(gem_name:, version: nil, description: nil) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 499

def register_in_registry(gem_name:, version: nil, description: nil)
  return unless defined?(Legion::Registry)
  return if Legion::Registry.lookup(gem_name)

  capabilities = read_gemspec_capabilities(gem_name)
  entry = Legion::Registry::Entry.new(
    name:         gem_name,
    version:      version,
    description:  description,
    capabilities: capabilities,
    airb_status:  'pending',
    risk_tier:    'low'
  )
  Legion::Registry.register(entry)
  register_sandbox_policy(gem_name: gem_name, capabilities: capabilities)
end

.register_sandbox_policy(gem_name:, capabilities: []) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 516

def register_sandbox_policy(gem_name:, capabilities: [])
  return unless defined?(Legion::Sandbox)

  Legion::Sandbox.register_policy(gem_name, capabilities: capabilities)
end

.reload_extension(name) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 981

def reload_extension(name)
  gem_name = normalize_lex_name(name)
  update_extension_handle(gem_name, reload_state: :updating)
  unregister_capabilities(gem_name)
  reset_runner_cache

  entry = @extensions&.find { |candidate| candidate[:gem_name] == gem_name }
  raise "#{gem_name} failed to reload" if entry && !load_extension(entry)

  refresh_llm_provider_registry(gem_name)
  update_extension_handle(gem_name, state: :running, reload_state: :idle, last_error: nil,
                                    latest_installed_version: latest_installed_version(gem_name))
  true
rescue StandardError => e
  update_extension_handle(gem_name, reload_state: :failed, last_error: e.message)
  raise
end

.require_identity_extensions ⇒ Object 



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# File 'lib/legion/extensions.rb', line 141

def require_identity_extensions
  find_extensions.select { |entry| entry[:category] == :identity }.each do |entry|
    gem_name = entry[:gem_name]
    ext_settings = extension_settings_for_entry(entry)

    if ext_settings.is_a?(Hash) && ext_settings.key?(:enabled) && !ext_settings[:enabled]
      Legion::Logging.info "Skipping #{gem_name} identity preload because it's disabled"
      next
    end

    Catalog.register(gem_name)
    register_extension_handle(gem_name, state:                    :registered,
                                        latest_installed_version: latest_installed_version(gem_name))
    ensure_namespace(entry[:const_path]) if entry[:segments].length > 1
    gem_load(entry)
  end
end

.reset_runtime_handles! ⇒ Object 



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# File 'lib/legion/extensions.rb', line 958

def reset_runtime_handles!
  extension_handle_registry.reset!
end

.resolve_actor_type(actor_class) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 445

def resolve_actor_type(actor_class)
  anc = actor_class.ancestors
  ACTOR_TYPE_MAP.each do |const, type|
    return type if anc.include?(Legion::Extensions::Actors.const_get(const))
  end
  Legion::Logging.warn "Unknown actor type for #{actor_class}, defaulting to loop"
  :loop
end

.run_extension_phase(phase_num, entries) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 399

def run_extension_phase(phase_num, entries)
  return if entries.empty?

  @pending_actors = Concurrent::Array.new
  load_phase_extensions(phase_num, entries)
  hook_phase_actors(phase_num)
end

.service_extension_names ⇒ Object 



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# File 'lib/legion/extensions.rb', line 839

def service_extension_names
  %w[consul github http microsoft_teams nomad redis s3 tfe vault].freeze
end

.settings_path_for_entry(segments, nesting) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1222

def settings_path_for_entry(segments, nesting)
  if nesting
    segments.map(&:to_sym)
  else
    [segments.join('_').to_sym]
  end
end

.setup ⇒ Object 



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# File 'lib/legion/extensions.rb', line 15

def setup
  hook_extensions
end

.shutdown ⇒ Object

rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity



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# File 'lib/legion/extensions.rb', line 57

def shutdown # rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
  return nil if @loaded_extensions.nil?

  deadline = Legion::Settings.dig(:extensions, :shutdown_timeout) || 15
  shutdown_start = Time.now

  transition_loaded_extensions(:stopping)

  if @subscription_pool
    @subscription_pool.shutdown
    @subscription_pool.kill unless @subscription_pool.wait_for_termination(5)
    @subscription_pool = nil
  end

  # Cancel all running instances (real objects, not new instances)
  @running_instances&.each do |instance|
    instance.cancel if instance.respond_to?(:cancel)
  rescue StandardError => e
    Legion::Logging.debug "Extension shutdown cancel failed: #{e.message}" if defined?(Legion::Logging)
  end

  # Wait for in-flight work to drain, up to deadline
  remaining = deadline - (Time.now - shutdown_start)
  if remaining.positive?
    drain_start = Time.now
    loop do
      elapsed = Time.now - drain_start
      break if elapsed >= remaining

      still_active = @running_instances&.any? do |inst|
        (inst.respond_to?(:channel) && inst.instance_variable_get(:@queue)&.channel&.open?) ||
          (inst.instance_variable_get(:@timer).respond_to?(:running?) && inst.instance_variable_get(:@timer).running?) ||
          (inst.instance_variable_get(:@loop) == true)
      end
      break unless still_active

      sleep 0.25
    end
  end

  # Force-close any channels still open after deadline
  elapsed = Time.now - shutdown_start
  if elapsed >= deadline
    Legion::Logging.warn "Shutdown deadline (#{deadline}s) reached, force-closing remaining actors" if defined?(Legion::Logging)
    @running_instances&.each do |inst|
      queue = inst.instance_variable_get(:@queue)
      queue&.channel&.close if queue&.channel.respond_to?(:close) && queue.channel.open?
      timer = inst.instance_variable_get(:@timer)
      timer&.kill if timer.respond_to?(:kill)
      inst.instance_variable_set(:@loop, false) if inst.instance_variable_defined?(:@loop)
    rescue StandardError => e
      Legion::Logging.debug "Force-close failed: #{e.message}" if defined?(Legion::Logging)
    end
  end

  @running_instances&.clear

  Legion::Dispatch.shutdown if defined?(Legion::Dispatch) && Legion::Dispatch.instance_variable_get(:@dispatcher)

  transition_loaded_extensions(:stopped) { |name| unregister_capabilities(name) }
  Legion::Logging.info "Successfully shut down all actors (#{(Time.now - shutdown_start).round(1)}s)"
end

.transition_extension_handle(name, state) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 950

def transition_extension_handle(name, state)
  extension_handle_registry.transition(name, state)
end

.transition_loaded_extensions(state) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 1010

def transition_loaded_extensions(state)
  @loaded_extensions&.each do |name|
    Catalog.transition(name, state)
    transition_extension_handle(name, state)
    yield name if block_given?
  end
end

.unregister_capabilities(gem_name) ⇒ Object

Legacy capability registration - now handled by Tools::Discovery



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# File 'lib/legion/extensions.rb', line 753

def unregister_capabilities(gem_name)
  return unless defined?(Legion::Tools::Registry) && Legion::Tools::Registry.respond_to?(:unregister_extension)

  Legion::Tools::Registry.unregister_extension(gem_name)
end

.update_extension_handle(name, **attrs) ⇒ Object 



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# File 'lib/legion/extensions.rb', line 954

def update_extension_handle(name, **attrs)
  extension_handle_registry.update(name, **attrs)
end