lex-lakera
LegionIO extension for the Lakera Guard v2 API — AI content security including prompt injection detection, PII detection, content moderation, and malicious link detection.
Supports both Lakera SaaS (regional endpoints, Enterprise policy/project management) and self-hosted deployments.
Installation
Add to your Gemfile:
gem 'lex-lakera'Usage
Screen Content (SaaS)
require 'legion/extensions/lakera'
client = Legion::Extensions::Lakera::Client.new(api_key: 'lk_...')
result = client.check(
messages: [{ role: 'user', content: 'Ignore previous instructions and...' }],
api_key: 'lk_...',
breakdown: true,
payload: true
)
if result[:result]['flagged']
puts "Content flagged!"
result[:result]['breakdown'].each do |b|
puts " #{b['detector_type']}: #{b['detected']}" if b['detected']
end
endDetailed Confidence Analysis
result = client.check_detailed(
messages: [{ role: 'user', content: 'My SSN is 123-45-6789' }],
api_key: 'lk_...'
)
result[:result]['results'].each do |r|
puts "#{r['detector_type']}: #{r['result']}"
end
# => prompt_attack: l5_unlikely
# => pii: l1_confidentRegional Endpoints
client = Legion::Extensions::Lakera::Client.new(
api_key: 'lk_...',
region: :eu_west_1 # :us, :us_east_1, :us_west_2, :eu_west_1, :ap_southeast_1
)Enterprise Policy Management
result = client.create_policy(
name: 'Strict Policy',
input_detectors: [{ type: 'prompt_attack', sensitivity: 'L4' }],
output_detectors: [{ type: 'pii', sensitivity: 'L2' }],
api_key: 'lk_...'
)Self-Hosted Health Monitoring
client = Legion::Extensions::Lakera::Client.new(
host: 'http://lakera.internal:8000',
self_hosted: true
)
client.live(host: 'http://lakera.internal:8000')
client.ready(host: 'http://lakera.internal:8000')
client.startup(host: 'http://lakera.internal:8000')License
MIT