CI/CD pipeline explained: build, test, deploy

A CI/CD pipeline automates the process of taking code from a developer's commit through building, testing, and deploying to production, enhancing the efficiency and reliability of software development. Continuous integration (CI) involves the automatic building and testing of code with every change, while continuous delivery (CD) or deployment automates the release of tested code to staging or production environments. Before the advent of CI/CD, releases were manual and infrequent, but the practice now enables multiple, automated deployments daily. A typical CI/CD pipeline comprises four stages: source, build, test, and deploy, with tools like GitHub Actions, GitLab CI/CD, Jenkins, CircleCI, and Travis CI facilitating the process. CI/CD is essential not only for application code but also for automation workflows, allowing version-controlled workflows and automated testing of automations. The pipeline can also address AI-powered workflows' unique challenges, such as prompt regression testing, model version pinning, and cost monitoring, ensuring that updates do not disrupt production environments. Overall, CI/CD has become a critical component of modern software development, offering significant improvements in deployment frequency and incident recovery times.

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