{Frank Mittelbach}
{Hooks, sockets and plugs}
{Driven by the need to support tagging, a number of ideas are being
introduced into the \LaTeX\ kernel to allow more flexible changes to code
paths, design aspects and document command creation. Hooks were
introduced a few releases ago, and provide a way to manage the
interaction between packages in a flexible and powerful way. More
recently, we brought in sockets and plugs: places where exactly one code
path is needed, but exactly what that code path is needs to be
swappable. In this talk, we'll look at why we need both sockets and
hooks, and which to use when.}