#21 gF footgun fixed and #13 xfade confirmed live this session:
- live/lib/prelude.tidal: nucleus of the ParVagues lib (#23). Two eval-blocks PLN
  can shadow into a running session (no reboot):
  * gF1/gF2/gF3 rebuilt on CORE hpf/lpf mapped so fader-at-rest (CC=0) == BYPASS.
    The old  (# djfbus N …)  referenced an UNregistered SuperDirt effect and rested
    at an extreme → muted the orbit with no recovery. New form structurally cannot
    mute: untouched = transparent, push fader = sweep in. PLN confirmed 'work great'.
  * d1..d12 = xfade N . (|< orbit N-1): every track LAUNCH crossfades 4 cycles AND
    keeps its orbit (old bare  xfade N  lost the orbit → wrong LCXL column/stem).
    Plus orbit-correct  jumpTo i  for hard cuts. PLN confirmed 'no more abrupt cut boom!'.
- visuals/slop/: scaffold for Kevin's Slopmotion — README (NOW=generate shareable
  MP4s, LATER=gig visual engine) + FEEDBACK.md log to hand back to him.

Not yet baked into BootTidal.hs — kept as evaluable prelude until fully road-tested.