JSONValidator

org.llm4s.agent.guardrails.builtin.JSONValidator
See theJSONValidator companion object
class JSONValidator(schema: Option[Value]) extends OutputGuardrail

Validates that output is valid JSON matching an optional schema.

This guardrail ensures that LLM output is properly formatted JSON, which is useful when requesting structured data from the agent.

Value parameters

schema

Optional JSON schema to validate against (minimal subset)

Attributes

Companion
object
Graph
Supertypes
trait Guardrail[String]
class Object
trait Matchable
class Any

Members list

Value members

Concrete methods

override def validate(value: String): Result[String]

Validate a value.

Validate a value.

This is a PURE FUNCTION - no side effects allowed. Same input always produces same output.

Value parameters

value

The value to validate

Attributes

Returns

Right(value) if valid, Left(error) if invalid

Definition Classes

Inherited methods

def andThen(other: Guardrail[String]): Guardrail[String]

Compose this guardrail with another sequentially.

Compose this guardrail with another sequentially.

The second guardrail runs only if this one passes.

Value parameters

other

The guardrail to run after this one

Attributes

Returns

A composite guardrail that runs both in sequence

Inherited from:
Guardrail
def transform(output: String): String

Optional: Transform the output after validation. Default is identity (no transformation).

Optional: Transform the output after validation. Default is identity (no transformation).

Value parameters

output

The validated output

Attributes

Returns

The transformed output

Inherited from:
OutputGuardrail

Concrete fields

override val description: Option[String]

Optional description of what this guardrail validates.

Optional description of what this guardrail validates.

Attributes

val name: String

Name of this guardrail for logging and error messages.

Name of this guardrail for logging and error messages.

Attributes