Development Dependencies
Development dependencies are software packages, libraries, or tools that are required only during the development, testing, or building of an application, but not in its production runtime. They typically include testing frameworks, build tools, linters, and code formatters. This concept is commonly managed in package ecosystems like npm, pip, and Maven to separate development-only tools from production dependencies.
Developers should use development dependencies to keep production deployments lean and secure by excluding unnecessary tools, reducing attack surfaces and deployment sizes. This separation is crucial in modern software development workflows for efficient testing, code quality enforcement, and build automation without impacting runtime performance. It's particularly important in CI/CD pipelines and containerized environments where minimal production images are desired.