Code or designs that trade on a particularly intimate
knowledge or experience of a particular operating system or
language or complex application interface. Distinguished from
deep magic, which trades more on arcane *theoretical*
knowledge. Writing device drivers is heavy wizardry; so is
interfacing to
X (sense 2) without a toolkit. Especially
found in source-code comments of the form "Heavy wizardry
begins here".
Compare
voodoo programming.