Legacy Code Archive

This directory contains code that has been superseded by the current architecture but is kept for reference.

File / Dir	Replaced By	Reason
`lbm_driver.py`	`src/CelerisLab/simulation.py` + `lbm/field.py` + `lbm/stepper.py`	Monolithic FlowField class. New Simulation API separates concerns: CudaContext / LBMField / LBMStepper / ObjectManager.
`cuda_compiler_v1.py`	`src/CelerisLab/cuda/compiler_v2.py`	macros.h-based build system. New compiler writes typed config/*.h headers per architectural layer.
`macros.h`	`src/CelerisLab/lbm/kernels/config/*.h`	Single flat macro file. Now split into config_grid.h / config_physics.h / config_method.h / config_objects.h matching the Global/Method/Case/Debug parameter hierarchy.
`common_utils.py`	`src/CelerisLab/config.py` + `src/CelerisLab/cuda/context.py`	FlowFieldConfig / CudaConfig NamedTuples and their JSON loaders. Replaced by LBMConfig / BodyConfig dataclasses (config.py) and CudaContext (cuda/context.py).
`lbm_configs/`	`src/CelerisLab/configs/`	Old JSON config format used by FlowField / compiler_v1.

Notes

None of these files is imported by any active module.
lbm_driver.py (FlowField) depended on cuda_compiler_v1.py and common_utils.py; all three were removed from src together.
macros.h was the old single-file configuration for kernel_v2.cu; kernel_v2.cu now includes config.h which aggregates config/*.h.