CI/CD pipelines that test before they deploy

Sample article. This text shows the layout. The real article replaces it before launch.

Checks in order of cost

Lint and type checks first, unit tests next, then the slower integration and end-to-end runs, so cheap failures stop the pipeline early.

Deploy only what passed

Build once, test that build, and promote the same artifact to each environment.

Make rollback boring

Every deployment should be one command away from the previous version.