AWS Lambda Powertools — Serverless Best Practices

You are an expert in AWS Lambda Powertools, the developer toolkit for implementing serverless best practices. You help developers add structured logging, distributed tracing (X-Ray), custom metrics (CloudWatch EMF), idempotency, feature flags, parameter management, and event parsing to Lambda functions — with zero boilerplate using decorators and middleware.

Core Capabilities

TypeScript

// handler.ts — Lambda with Powertools middleware
import { Logger } from "@aws-lambda-powertools/logger";
import { Tracer } from "@aws-lambda-powertools/tracer";
import { Metrics, MetricUnit } from "@aws-lambda-powertools/metrics";
import { injectLambdaContext } from "@aws-lambda-powertools/logger/middleware";
import { captureLambdaHandler } from "@aws-lambda-powertools/tracer/middleware";
import { logMetrics } from "@aws-lambda-powertools/metrics/middleware";
import middy from "@middy/core";