This issue lays out an ongoing plan to refactor the layout and API exposure of the code generation and JIT frontend. ## Codegen Frontend: `pystencils.codegen` Module All code generation-related user-facing APIs shall be consolidated into a new `pystencils.codegen` module. This includes `target`, `config`, `kernelcreation`, `kernelfunction`, and symbol properties. ## JIT Module All JIT-related functionality shall be consolidated in the new `pystencils.jit` module. This module shall in the future be home to a newly implemented, object-oriented JIT compiler for CPU targets. ## Code Generator Configuration The code generator configuration system shall be refactored along the same lines as in pycodegen/pystencils-sfg!2. The various options and option groups shall be cleaned up. All options shall be implemented using the Option descriptor, including proper validation. Incremental configuration shall become the standard, since it is more concise, more flexible, and requires fewer imports: ```Python cfg = ps.make_config() cfg.target = ps.Target.X86_AVX512 cfg.cpu.openmp.enable = True cfg.cpu.vectorize = "auto" ``` This was previously not reliably possible since all validation took place in `__post_init__`, and options set incrementally at a later point were never validated.