Stimulus: A user needs a specific kind of check currently not available in HtmlSC
Reaction: The new checking algorithm is implemented and integrated in (a fork of) HtmlSC.
Metrics:
Background: HTMLSanityChecker (short: HtmlSC) is an open-source checker for HTML files. It can check multiple types of problems, but sometimes users need specific additional checks (like grammar, use of certain vocabulary, use of certain stylesheets etc)
Such changes are usually not integrated in the main branch, but will remain in user-specific forks.