Many years ago, I wrote a joke library called Kaboom. Its purpose was to detect if error reporting was improperly configured in Development environments, and if so, go Kaboom! by throwing an exception.
Yesterday, I was writing some code for Sculpin (an open source static site generator that I contribute to) and I wanted to make sure that a particular bit of code that could contain path traversal vulnerabilities wouldn't be forgotten about when I wandered away to other priorities.
To accomplish that, I added a unix timestamp check of "today plus one day" hard-coded as magic numbers. That way, when I came back to the PR, it would stop working in a very obvious way, letting me know that the issue had not been solved.
Then, I tweeted about it. And some people were intrigued by it. They had concerns, of course, but the response inspired me to rewrite my Kaboom project and release it to Packagist.
Introducing Kaboom v1.0