These are example and helper files for the AFL_PYTHON_MODULE feature. See docs/python_mutators.txt for more information example.py - this is the template you can use, the functions are there but they are empty simple-chunk-replace.py - this is a simple example where chunks are replaced common.py - this can be used for common functions and helpers. the examples do not use this though. But you can :) wrapper_afl_min.py - mutation of XML documents, loads XmlMutatorMin.py XmlMutatorMin.py - module for XML mutation