Here is a list of all documented files with brief descriptions:

[detail level 1234]

include
expectations
expectation.hpp
handler.hpp	Contains the primary handlers for running Matchers
formatters
formatters_base.hpp
junit_xml.hpp
progress.hpp
tap.hpp
term_colors.hpp
verbose.hpp
matchers
errors
fail.hpp
have_error.hpp
have_value.hpp
throw.hpp
numeric
be_between.hpp
be_greater_than.hpp
be_less_than.hpp
be_within.hpp
strings
end_with.hpp
match.hpp
start_with.hpp
be_nullptr.hpp
contain.hpp
equal.hpp
matcher_base.hpp	Contains the base class for all Matchers
pretty_matchers.hpp
satisfy.hpp
argparse.hpp
class_description.hpp
cppspec.hpp	The core header file for Cppspec
description.hpp	Defines the Description class and associated functions
it.hpp
it_base.hpp
let.hpp
result.hpp
runnable.hpp
runner.hpp
util.hpp	Utility functions and classes