interface CodeBasedOptions ⚠️

Language	Type name
.NET	Amazon.CDK.AWS.Bedrock.Agentcore.Alpha.CodeBasedOptions
Go	github.com/aws/aws-cdk-go/awsbedrockagentcorealpha/v2#CodeBasedOptions
Java	software.amazon.awscdk.services.bedrock.agentcore.alpha.CodeBasedOptions
Python	aws_cdk.aws_bedrock_agentcore_alpha.CodeBasedOptions
TypeScript (source)	@aws-cdk/aws-bedrock-agentcore-alpha » CodeBasedOptions

⚠️ Deprecated: Use the equivalent construct from aws-cdk-lib/aws-bedrockagentcore instead.

Options for configuring a code-based custom evaluator using a Lambda function.

Uses a Lambda function to implement custom evaluation logic.

Example

// LLM-as-a-Judge evaluator
const llmConfig = agentcore.EvaluatorConfig.llmAsAJudge({
  instructions: 'Evaluate whether the agent response is helpful.',
  modelId: 'us.anthropic.claude-sonnet-4-6',
  ratingScale: agentcore.EvaluatorRatingScale.categorical([
    { label: 'Good', definition: 'The response is helpful.' },
    { label: 'Bad', definition: 'The response is not helpful.' },
  ]),
});

// Code-based evaluator
declare const myEvalFunction: lambda.IFunction;
const codeConfig = agentcore.EvaluatorConfig.codeBased({
  lambdaFunction: myEvalFunction,
});

Properties

Name	Type	Description
lambdaFunction⚠️	IFunction	The Lambda function used for evaluation.
timeout?⚠️	Duration	The timeout for the Lambda function invocation during evaluation.

---

lambdaFunction⚠️

⚠️ Deprecated: Use the equivalent construct from aws-cdk-lib/aws-bedrockagentcore instead.

Type: IFunction

The Lambda function used for evaluation.

The function will be granted invoke permissions for the bedrock-agentcore.amazonaws.com service principal, scoped to this specific evaluator resource.

---

timeout?⚠️

⚠️ Deprecated: Use the equivalent construct from aws-cdk-lib/aws-bedrockagentcore instead.

Type: Duration (optional, default: The AgentCore evaluation service's default Lambda timeout is used)

The timeout for the Lambda function invocation during evaluation.

When not specified, the AgentCore evaluation service uses its default timeout for Lambda-based evaluators.

See also: https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/custom-evaluators.html