This repository is a mature, well-maintained Node.js library for building SQS-based applications without boilerplate. It provides a `Consumer` class that polls an AWS SQS queue, invokes user-defined message handlers (`handleMessage` or `handleMessageBatch`), and manages the full message lifecycle: receive, process, delete on success, and visibility timeout management. The architecture is a single class extending a typed `EventEmitter`, emitting events for lifecycle hooks (started, stopped, message_received, message_processed, error, etc.). Key entry points are `Consumer.create(options)`, `consumer.start()`, and `consumer.stop()`. The library supports both single and batch message processing, configurable polling intervals, heartbeat extensions for long-running handlers, graceful shutdown with in-flight message completion, and FIFO queue warnings. External dependencies are minimal: `@aws-sdk/client-sqs` for AWS SDK v3 and `debug` for logging. The codebase is written in TypeScript, fully tested with unit and integration tests, and follows semantic versioning with automated releases via semantic-release.