LWWConfig Integration Notes

LWWConfig is the shared configuration object for the simulator, CLI, tests, visualization helpers, and profiling script. The public import is:

from lww_transport import LWWConfig

Primary Consumers

Module	Role
`lww_transport.simulator`	Allocates state arrays and controls steady and transient workflows.
`lww_transport.cli`	Builds configuration from command-line options.
`lww_transport.core`	Receives configuration through compatibility wrappers.
`lww_transport.visualization`	Draws RTD geometry from configuration fields.
`scripts/profile_transient.py`	Creates benchmark configurations.
`tests/test_core.py`	Uses small-grid configurations for smoke tests.

Field	Purpose
`nx`, `n`, `size`	Grid dimensions and phase-space vector length.
`exchange`	Enables the density-dependent exchange correction.
`verbose`	Enables solver progress output.
`kernel_backend`	Selects `auto`, `cpp`, `numba`, or `python` kernels.
`irlx`	Controls inclusion of relaxation and scattering terms.
`rfa`, `density_stop`, `poisson_vmax_stop`	Self-consistency controls.
`box`, `well`, `barrier`, `spacer`, `pot`	RTD geometry and barrier potential.

cfg = LWWConfig.standard_rtd()
cfg = LWWConfig.quick_test(nx=10, n=8)
cfg = LWWConfig(nx=86, n=72, exchange=True, kernel_backend="cpp")

Grouped parameters are available through:

cfg.discretization
cfg.material
cfg.geometry
cfg.operating
cfg.solver
cfg.compute

Flat properties remain available for compatibility:

cfg.nx
cfg.n
cfg.exchange
cfg.kernel_backend