ok   reserve-paper lowers its loss (0.256 -> 0.102)
ok   no change outside the rect
ok   protected rect untouched
ok   commands replay exactly
ok   connect-mass lowers its loss (0.197 -> 0.007)
ok   soften-edge lowers contrast loss (0.415 -> 0.360)
ok   final edge passes integrity (pocket +0.057, in 1.86px, out 0.00px)
ok   a zero-tolerance guard admits fewer actions (0 vs 14 commands)
ok   conflicting intention reverted (undid dark-band (0.0000 -> 0.0073))
ok   canvas is back to the state the first intention left
ok   break-edge lowers its loss (1.000 -> 0.000, 31 commands)
ok   no committed move beyond maxShift (max 10.0 px)
ok   unknown kernel is refused
all passed