Some related resources, for intermediate shell users already familiar with shellcheck and looking to dig deeper into the history underlying obscure corner cases, include the developer Vidar's blog (@ https://www.vidarholen.net/contents/blog/), the blog of the Oil-Shell developer (@ https://www.oilshell.org/blog/), and Greg's Wiki (@ https://mywiki.wooledge.org/BashPitfalls).