Module: Legion::LLM::Inference::Steps::TierAssigner

Extended by:
Legion::Logging::Helper
Defined in:
lib/legion/llm/inference/steps/tier_assigner.rb

Constant Summary collapse

DEFAULT_MAPPINGS = 
[
  { pattern: 'gaia:tick:*', tier: :local, intent: { cost: :minimize } },
  { pattern: 'gaia:dream:*', tier: :local, intent: { cost: :minimize } },
  { pattern: 'system:guardrails', tier: :local, intent: { cost: :minimize, effort: :low } },
  { pattern: 'system:reflection', tier: :local, intent: { cost: :minimize, effort: :moderate } },
  { pattern: 'user:*', tier: :frontier, intent: { effort: :reasoning } }
].freeze

Class Method Summary collapse

Class Method Details

.assign(caller:, classification:, priority:, gaia_hint:, existing_tier:, existing_intent: nil) ⇒ Object

rubocop:disable Lint/UnusedMethodArgument



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 22

def assign(caller:, classification:, priority:, gaia_hint:, existing_tier:, existing_intent: nil) # rubocop:disable Lint/UnusedMethodArgument
  # Privacy classifications are hard routing constraints. They must
  # override caller-supplied tier/intent and advisory signals.
  if privacy_constrained?(classification)
    log.info('[llm][routing] tier_assigned source=classification tier=local forced=true')
    return { tier: :local, intent: { privacy: :strict }, source: :classification, forced: true }
  end

  if existing_tier
    log.debug("[llm][routing] tier_preserved tier=#{existing_tier}")
    return nil
  end

  # 1. GAIA routing hint
  recommended = nested_value(gaia_hint, :data, :tier)
  if recommended.nil? && nested_value(gaia_hint, :data, :recommended_tier)
    log.warn('[llm][routing] gaia_hint uses deprecated :recommended_tier; GAIA advisory should emit :tier')
    recommended = nested_value(gaia_hint, :data, :recommended_tier)
  end

  if recommended
    log.info("[llm][routing] tier_assigned source=gaia tier=#{recommended}")
    return { tier: recommended.to_sym, source: :gaia }
  end

  # 2. Settings-driven role mappings
  mapping = find_role_mapping(caller)
  return mapping if mapping

  # 3. Priority-driven
  case priority&.to_sym
  when :critical, :high
    log.info("[llm][routing] tier_assigned source=priority tier=frontier priority=#{priority}")
    { tier: :frontier, intent: { effort: :reasoning }, source: :priority }
  when :low, :background
    log.info("[llm][routing] tier_assigned source=priority tier=local priority=#{priority}")
    { tier: :local, intent: { cost: :minimize }, source: :priority }
  else
    log.debug(
      '[llm][steps][tier_assigner] action=no_assignment ' \
      "caller=#{caller&.dig(:requested_by, :identity) || 'none'} priority=#{priority || 'none'}"
    )
    nil
  end
end

.find_role_mapping(caller) ⇒ Object 



76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 76

def find_role_mapping(caller)
  identity = nested_value(caller, :requested_by, :identity)
  return nil unless identity

  identity = identity.to_s
  tier_mappings.each do |mapping|
    next unless File.fnmatch?(value(mapping, :pattern).to_s, identity)

    tier = value(mapping, :tier)
    log.info("[llm][routing] tier_mapping identity=#{identity} tier=#{tier}")
    result = { tier: tier&.to_sym, intent: value(mapping, :intent), source: :role_mapping }
    result.merge!(gaia_preferred_lane) if identity.start_with?('gaia:')
    return result
  end
  nil
end

.gaia_preferred_lane ⇒ Object 



93
94
95
96
97
98
99
100
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 93

def gaia_preferred_lane
  provider = Legion::Settings.dig(:llm, :gaia, :preferred_provider)
  model    = Legion::Settings.dig(:llm, :gaia, :preferred_model)
  extras   = {}
  extras[:provider] = provider.to_sym if provider
  extras[:model]    = model.to_s      if model
  extras
end

.nested_value(hash, *keys) ⇒ Object 



116
117
118
119
120
121
122
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 116

def nested_value(hash, *keys)
  keys.reduce(hash) do |current, key|
    return nil unless current.respond_to?(:key?)

    value(current, key)
  end
end

.privacy_constrained?(classification) ⇒ Boolean

Returns:

  • (Boolean) 


68
69
70
71
72
73
74
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 68

def privacy_constrained?(classification)
  return false unless classification

  value(classification, :contains_phi) ||
    value(classification, :contains_pii) ||
    value(classification, :level)&.to_sym == :restricted
end

.tier_mappings ⇒ Object 



102
103
104
105
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 102

def tier_mappings
  configured = Legion::Settings[:llm][:routing][:tier_mappings]
  configured.nil? || configured.empty? ? DEFAULT_MAPPINGS : configured
end

.value(hash, key) ⇒ Object 



107
108
109
110
111
112
113
114
 
# File 'lib/legion/llm/inference/steps/tier_assigner.rb', line 107

def value(hash, key)
  return nil unless hash.respond_to?(:key?)

  string_key = key.to_s
  return hash[string_key] if hash.key?(string_key)

  hash[key] if hash.key?(key)
end