Here is a list of all files with brief descriptions:

ar_interaction.hpp
ar_perturber.hpp
artificial_particles.hpp
bse_interface.h
bse_test.cxx
changeover.hpp
cluster_list.hpp
cuda_pointer.h
doc.h
domain.hpp
energy.hpp
escaper.hpp
force_fugaku.hpp
force_gpu_cuda.hpp
format_transfer.cxx
galpy_help.py
galpy_interface.h
galpy_pot_movie.py
galpy_test.cxx
get_version.hpp
hard.hpp
hard_assert.hpp
hard_debug.cxx
hard_ptcl.hpp
hard_test.cxx
hermite_information.hpp
hermite_interaction.hpp
hermite_perturber.hpp
io.hpp
io_test.cxx
kickdriftstep.hpp
main.cc
matrix3.hpp
orbit_sampling.hpp
particle_base.hpp
particle_distribution_generator.hpp
petar.hpp
phantomquad_for_p3t_k.hpp
phantomquad_for_p3t_x86.hpp
pikg_vector.hpp
pn_BH.h
profile.hpp
pseudoparticle_multipole.hpp
ptcl.hpp
search_group_candidate.hpp
simd_test.cxx
soft_force.hpp
soft_ptcl.hpp
stability.hpp
static_variables.hpp
status.hpp
tidal_tensor.hpp
tidal_tensor_test.cxx
tide_test.cxx
two_body_tide.hpp