Module: Legion::LLM::Pipeline::Steps::Classification

Includes:
Legion::Logging::Helper
Included in:
Executor
Defined in:
lib/legion/llm/pipeline/steps/classification.rb

Constant Summary collapse

LEVELS = 
%i[public internal confidential restricted].freeze
PII_PATTERNS = 
{
  ssn:   /\b\d{3}-\d{2}-\d{4}\b/,
  email: /\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b/,
  phone: /\b(?:\+?1[\s.-]?)?\(?\d{3}\)?[\s.-]?\d{3}[\s.-]?\d{4}\b/
}.freeze
PHI_KEYWORDS = 
%w[
  patient diagnosis medication prescription
  dob date-of-birth mrn medical-record
  npi clinical treatment
].freeze

Instance Method Summary collapse

Instance Method Details

#step_classification ⇒ Object 



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# File 'lib/legion/llm/pipeline/steps/classification.rb', line 26

def step_classification
  return unless @request.classification || compliance_classification_default

  classification  = @request.classification || compliance_classification_default
  declared_level  = classification[:level]
  scan            = scan_content_for_sensitive_data
  effective_level = upgrade_if_needed(declared_level, scan)
  upgraded        = effective_level != declared_level

  @enrichments['classification:scan'] = {
    declared_level:    declared_level,
    effective_level:   effective_level,
    contains_pii:      scan[:contains_pii],
    contains_phi:      scan[:contains_phi],
    detected_patterns: scan[:patterns],
    upgraded:          upgraded,
    timestamp:         Time.now
  }

  if upgraded
    @warnings << "Classification upgraded from #{declared_level} to #{effective_level}: " \
                 "sensitive patterns detected (#{scan[:patterns].join(', ')})"
  end

  @audit[:'classification:scan'] = {
    outcome:     :success,
    detail:      "level=#{effective_level}, upgraded=#{upgraded}",
    data:        { declared: declared_level, effective: effective_level, patterns: scan[:patterns] },
    duration_ms: 0,
    timestamp:   Time.now
  }

  @timeline.record(
    category:  :audit, key: 'classification:scan',
    direction: :internal, detail: "level=#{effective_level}, upgraded=#{upgraded}",
    from:      'pipeline', to: 'classification'
  )
end