For the complete documentation index, see llms.txt. Markdown versions of all docs pages are available by appending .md to any docs URL.
Multi-layered guardrails
Run prompt guards in sequence, creating defense-in-depth protection.
You can configure multiple prompt guards that run in sequence, creating defense-in-depth protection. Guards are evaluated in the order they appear in the configuration.
Example configuration that uses all three layers:
cat <<EOF > config.yaml
# yaml-language-server: $schema=https://agentgateway.dev/schema/config
llm:
models:
- name: "*"
provider: openAI
params:
model: gpt-3.5-turbo
apiKey: "$OPENAI_API_KEY"
guardrails:
request:
# Layer 1: Fast regex check for known patterns
- regex:
action: reject
rules:
- builtin: ssn
- builtin: creditCard
- builtin: email
rejection:
body: "Request contains PII and cannot be processed"
# Layer 2: OpenAI moderation for harmful content
- openAIModeration:
model: omni-moderation-latest
policies:
backendAuth:
key: "$OPENAI_API_KEY"
rejection:
body: "Content blocked by moderation policy"
# Layer 3: Custom webhook for domain-specific checks
- webhook:
target:
host: content-safety-webhook.example.com:8000
response:
# Response guards run in same order
- regex:
action: mask
rules:
- builtin: ssn
- builtin: creditCard
- webhook:
target:
host: content-safety-webhook.example.com:8000
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