Reference set: 6 authored synthetic answers; no model judge calls
format: TP=2 FP=2 FN=0 TN=2
task contract: TP=2 FP=0 FN=0 TN=4
Calculation fixture: 3 of 4 pass; any=True; all=False
pass@2=1.0000; all 2 IID plug-in=0.5625
The all-2 estimate assumes independent, unchanged trials; four fixture values are not a reliability study.