Guides developers building Datadog Apps with TypeScript, React, and the @datadog/apps scaffolder and CLI. Use when a user wants to scaffold, run, debug, upgrade, build, upload, or publish a Datadog App, set up CI/CD, use OAuth or API/application key auth, trigger or poll Workflow Automation from a backend function, choose DDSQL or Action Catalog for backend data access, query app datastores with DDSQL, or migrate an existing app from another tool such as Backstage (a software template, scaffolder template, template.yaml, or custom plugin) into a Datadog App, including backend function troubleshooting.