[aq1018]

• oscnb.velocity: the pot's slope candidates (two-point, two boxcars, least-squares line, one-pole on a difference), the carry helpers and the slopes that skip a carry's rows, the rest verdicts by position and by slope with the back-EMF veto, the back-EMF's signed estimate and boxcar, the switch, the rest override, the fixed-weight complementary pair and the seams
• pure float functions, constants as arguments, nothing of any servo bound at import
• gate (outside the repo): the nine scratch question scripts of the two analysis units run on the lifted module reproduce their logs and tables bit for bit
• Bench gate: none, offline analysis code