I have v1.23.1 of the ApiGen plugin installed (which seems to come standard with 8.0.2), and when I attempt to use it, I get an InvalidArgumentException saying "There are no commands defined in the "C" namespace." It's missing the "generate" argument that's required since ApiGen 4.0. If I create a batch file to work around this issue, then I end up with a RuntimeException saying "Too many arguments."

Without the batch file, the CLI output is this:

"C:\xampp\php\php.exe" "C:\xampp\php\apigen.phar" "--source" "C:\xampp\htdocs\proj" "--destination" "C:\Users\cburdick\Desktop\projdoc" "--title" "A Project" "--charset" "UTF-8" "--access-levels" "public,protected" "--internal" "no" "--php" "no" "--tree" "no" "--deprecated" "no" "--todo" "no" "--download" "no" "--source-code" "no" "--colors" "yes" "--update-check" "no"

This is entirely incorrect.

https://github.com/apigen/ApiGen/blob/master/UPGRADE-4.0.md

First and foremost, as stated, the "generate" argument is missing. Boolean arguments should be treated as flags. --source-code was removed and instead it should put --no-source-code if the user wishes not to have source code generated in the documentation.