Checkly is a synthetic monitoring platform that has developed a new CLI (Command-Line Interface) called "the bastard child of Jest and AWS CDK" which allows developers to write their Playwright-based E2E Checks and API checks using TypeScript/JavaScript, test them against the global infrastructure, deploy them from local boxes or CI pipelines, and store them in source control alongside application code. The CLI is designed around a "constructs architecture", where Checks are organized into files with specific extensions, inheriting properties from Project, Check Group, or can be overridden at an individual level. The CLI integrates with GitHub sync for Browser Checks, Pulumi as an alternative to Terraform, and allows developers to define Checks using TypeScript classes that describe Checkly resources. With the CLI, users can deploy their Checks to the Checkly cloud, where they will run in parallel and report back results to the terminal with logging and debug info when a Check fails. The vision for Checkly is to make monitoring as code workflow the primary way to add E2E testing and monitoring to application stacks.