A Python script using BeautifulSoup and Requests libraries to detect link rot in a website, specifically the Full Stack Python repository, by aggregating all links from the site, checking each URL for bad responses, and writing results to an output file. The script uses multiple approaches to improve accuracy, including parsing Markdown and HTML files, extracting URLs with BeautifulSoup, and using asynchronous processing with `concurrent.futures` to bypass I/O bottlenecks. The script can be run by executing Python and validates its functionality without relying on external tools or data structures, making it a self-contained solution for detecting link rot in websites.