The CHECK shipped with 6b7d750 ran the un-flagged repo gate: 107.93s wall,
82s of it the selftest-sweep leg. Inside the caller's harness it was killed
just after printing the section-4 header, so a green tree read as a failure.
Rebuilt as wizard-work/volt/CHECK-toolsmd-drift: per-leg timeout, the sweep
dropped from the budget (it is a wrapper over the cells graded directly here),
the leg tally asserted exactly, elapsed total printed. Non-vacuity measured by
three mutations on the real tree -- document drift (leg 1), uncommitted tool
drift (leg 2), index drift (leg 4) -- each rc 1, each restored clean.
volt
85cc9e6963