CI/CD Pipeline Design

CI/CD pipeline design involves structuring automated workflows that take code from commit to production in a reliable, repeatable manner. Continuous Integration (CI) automatically builds and tests every code change, catching integration errors early. Continuous Delivery (CD) extends this by automating the release process so that deployments are push-button, while Continuous Deployment goes further by automatically deploying every change that passes all pipeline stages.

A well-designed pipeline typically includes stages for dependency installation, linting, type checking, unit testing, integration testing, building artifacts, security scanning, and deployment. Each stage should fail fast and provide clear feedback. Pipeline design must consider parallelization of independent stages, caching of dependencies and build artifacts between runs, and environment parity between CI and production. Artifact immutability is critical: build once, deploy the same artifact to every environment.

Advanced pipeline patterns include matrix builds for testing across multiple runtimes or OS versions, conditional stages based on changed file paths (monorepo-aware pipelines), manual approval gates for production deployments, and automatic rollback on post-deploy health check failures. Pipeline-as-code practices keep the pipeline definition version-controlled alongside the application, ensuring reproducibility and auditability.