  This is the manual for the version 2 of HackAnalysis, a powerful,
lightweight, versatile and, most importantly, hackable, recasting tool. New
features in this version include: compressed event format storage for
ultra-fast development; integration of new physics and mathematics routines via
RestFrames and Eigen; automatic computation of systematic uncertainties; an
interface to ONNX for neural networks; easy implementation of new models via
QNUMBERS blocks; a python package for interfacing to pyhf, spey and in-built
statistics routines for fast computation of experimental limits; improved
integration with BSMArt for fast scanning, and a new batch running/convergence
check. Several new (electroweakino) analyses are included with this release.
