DeprecationNotices
DeprecationNotices, also known as deprecation notices, are communications issued by software projects to inform users that a feature, API, or component is considered obsolete and will be removed in a future release. They serve to encourage migration to supported alternatives while allowing time to adjust codebases and integrations. A typical deprecation notice identifies the deprecated item, explains the reason for deprecation, states the version since when it is deprecated, and provides a recommended replacement or migration path. It also specifies whether removal is planned for a particular future release and, if applicable, the impact on behavior and compatibility.
In practice, deprecation notices appear in release notes, API documentation, and code comments, often accompanied by
Best practices for maintainers include documenting the rationale, providing clear migration guides, and enabling tooling or
Examples include programming languages that emit deprecation warnings (such as deprecation annotations or runtime warnings) and