The Seigo Stage is the stage in software development when the
libraries for the product are ready (or very close to being ready) but the rest
of the product is still in need of polishing up. The stage comes between the
Beta and Release Candidate stages of software development because the software
product is still not ready to be a potential final product but libraries of the
software are release quality.
Origin of the 'Seigo Stage'
The term Seigo Stage was invented after a heated discussion on The
Linux Action Show! podcast regarding the naming of the KDE 4 second release
candidate not being up to the standard of what a release candidate should be.
The discussion took place between the two presenters of the show and Aaron Seigo
via Skype. It was finally agreed that the release candidate had been termed as
such because it was beyond beta quality as the libraries were of release
candidate quality. At this point one of the presenters said that they should
rename the stage KDE 4 had reached, the name they choose was the Seigo Stage.