30 failures to 5, and 22 of the 30 were runner defects

Two phantom executions removed, then 22 of 30 remaining failures traced to the repository or runner rather than the engine; 99.995% on 95,846 executions.

a3d616d3 reaches 99.97% with 30 failures and claims Annex B handling "more conformant than Node", a claim later retracted. d0854919: "test262: 30 -> 5, and none of the 5 is a live engine defect". Of the five, module-level using declarations that were never disposed accounted for six executions fixed the same day, and the mutually exclusive Annex B pair ("95,942/95,942 does not exist for any engine — V8 fails the same one") became the standing caveat.