PLN wanted `$ realtime` as a prefix. That shape cannot work: `realtime $ d1 $
pat` parses as `realtime (d1 pat)`, and d1 has already applied its transition
by then, so nothing in that position can undo it. What does work ships here:
`rt 1 $ ...` for a single transition-free launch, a one-line `let` that shadows
d1-d12 for the session, and the exact restore. No BootTidal edit, so tomorrow's
boot cannot break on tonight's untested Haskell — every line is copied from
BootTidal's own definitions, and the file says plainly that it has not been
through GHCi yet.

Also written down where he will find it again: the retrigger he blamed on the
crossfade is `resetCycles` sharing a block with the patterns, and the real fix
for the mode (an IORef compose/perform toggle, promoted into BootTidal) is
tomorrow's C-1.