LLM Code Review Checklist - C++ part Mid-2026

Nested checklist of all `*.cpp` / `*.h` file pairs under `cpp/dolfinx/`. Also add links to PRs when done.

- [ ] **common/**
- [ ] `defines.h`
- [ ] `dolfinx_common.h`
- [ ] `dolfinx_doc.h`
- [ ] `IndexMap`
- [ ] `IndexMap.h`
- [ ] `IndexMap.cpp`
- [ ] `local_range.h`
- [ ] `log`
- [ ] `log.h`
- [ ] `log.cpp`
- [ ] `math.h`
- [ ] `MPI`
- [ ] `MPI.h`
- [ ] `MPI.cpp`
- [ ] `Scatterer.h`
- [ ] `sort.h`
- [ ] `Table`
- [ ] `Table.h`
- [ ] `Table.cpp`
- [ ] `TimeLogger`
- [ ] `TimeLogger.h`
- [ ] `TimeLogger.cpp`
- [ ] `Timer.h`
- [ ] `timing`
- [ ] `timing.h`
- [ ] `timing.cpp`
- [ ] `types.h`
- [ ] `utils.h` https://github.com/FEniCS/dolfinx/pull/4322
- [ ] `version.h`
- [ ] **fem/**
- [ ] `assemble_expression_impl.h`
- [ ] `assemble_matrix_impl.h`
- [ ] `assemble_scalar_impl.h`
- [ ] `assemble_vector_impl.h`
- [ ] `assembler.h`
- [ ] `Constant.h`
- [ ] `CoordinateElement`
- [ ] `CoordinateElement.h`
- [ ] `CoordinateElement.cpp`
- [ ] `DirichletBC`
- [ ] `DirichletBC.h`
- [ ] `DirichletBC.cpp`
- [ ] `discreteoperators.h`
- [ ] `DofMap`
- [ ] `DofMap.h`
- [ ] `DofMap.cpp`
- [ ] `dofmapbuilder`
- [ ] `dofmapbuilder.h`
- [ ] `dofmapbuilder.cpp`
- [ ] `dolfinx_fem.h`
- [ ] `ElementDofLayout`
- [ ] `ElementDofLayout.h`
- [ ] `ElementDofLayout.cpp`
- [ ] `Expression.h`
- [ ] `FiniteElement`
- [ ] `FiniteElement.h`
- [ ] `FiniteElement.cpp`
- [ ] `Form.h`
- [ ] `Function.h`
- [ ] `FunctionSpace.h`
- [ ] `interpolate.h`
- [ ] `kernel.h`
- [ ] `pack.h`
- [ ] `petsc`
- [ ] `petsc.h`
- [ ] `petsc.cpp`
- [ ] `sparsitybuild`
- [ ] `sparsitybuild.h`
- [ ] `sparsitybuild.cpp`
- [ ] `traits.h`
- [ ] `utils`
- [ ] `utils.h`
- [ ] `utils.cpp`
- [ ] **geometry/**
- [ ] `BoundingBoxTree.h`
- [ ] `dolfinx_geometry.h`
- [ ] `gjk.h`
- [ ] `utils.h`
- [ ] **graph/**
- [ ] `AdjacencyList.h`
- [ ] `dolfinx_graph.h`
- [ ] `ordering`
- [ ] `ordering.h`
- [ ] `ordering.cpp`
- [ ] `partition`
- [ ] `partition.h`
- [ ] `partition.cpp`
- [ ] `partitioners`
- [ ] `partitioners.h`
- [ ] `partitioners.cpp`
- [ ] `utils`
- [ ] `utils.h`
- [ ] `utils.cpp`
- [ ] **io/**
- [ ] `ADIOS2Writers`
- [ ] `ADIOS2Writers.h`
- [ ] `ADIOS2Writers.cpp`
- [ ] `cells`
- [ ] `cells.h`
- [ ] `cells.cpp`
- [ ] `dolfinx_io.h`
- [ ] `HDF5Interface`
- [ ] `HDF5Interface.h`
- [ ] `HDF5Interface.cpp`
- [ ] `utils.h`
- [ ] `vtk_utils`
- [ ] `vtk_utils.h`
- [ ] `vtk_utils.cpp`
- [ ] `VTKFile`
- [ ] `VTKFile.h`
- [ ] `VTKFile.cpp`
- [ ] `VTKHDF.h`
- [ ] `xdmf_function`
- [ ] `xdmf_function.h`
- [ ] `xdmf_function.cpp`
- [ ] `xdmf_mesh`
- [ ] `xdmf_mesh.h`
- [ ] `xdmf_mesh.cpp`
- [ ] `xdmf_utils`
- [ ] `xdmf_utils.h`
- [ ] `xdmf_utils.cpp`
- [ ] `XDMFFile`
- [ ] `XDMFFile.h`
- [ ] `XDMFFile.cpp`
- [ ] **la/**
- [ ] `dolfinx_la.h`
- [ ] `matmul.h`
- [ ] `matrix_csr_impl.h`
- [ ] `MatrixCSR.h`
- [ ] `mattrans.h`
- [ ] `petsc`
- [ ] `petsc.h`
- [ ] `petsc.cpp`
- [ ] `slepc`
- [ ] `slepc.h`
- [ ] `slepc.cpp`
- [ ] `SparsityPattern`
- [ ] `SparsityPattern.h`
- [ ] `SparsityPattern.cpp`
- [ ] `superlu_dist`
- [ ] `superlu_dist.h`
- [ ] `superlu_dist.cpp`
- [ ] `utils.h`
- [ ] `Vector.h`
- [ ] **mesh/**
- [ ] `cell_types`
- [ ] `cell_types.h`
- [ ] `cell_types.cpp`
- [ ] `dolfinx_mesh.h`
- [ ] `EntityMap`
- [ ] `EntityMap.h`
- [ ] `EntityMap.cpp`
- [ ] `generation.h`
- [ ] `Geometry.h`
- [ ] `graphbuild`
- [ ] `graphbuild.h`
- [ ] `graphbuild.cpp`
- [ ] `Mesh.h`
- [ ] `MeshTags.h`
- [ ] `permutationcomputation`
- [ ] `permutationcomputation.h`
- [ ] `permutationcomputation.cpp`
- [ ] `Topology`
- [ ] `Topology.h`
- [ ] `Topology.cpp`
- [ ] `topologycomputation`
- [ ] `topologycomputation.h`
- [ ] `topologycomputation.cpp`
- [ ] `utils`
- [ ] `utils.h`
- [ ] `utils.cpp`
- [ ] **nls/**
- [ ] `dolfinx_nls.h`
- [ ] `NewtonSolver`
- [ ] `NewtonSolver.h`
- [ ] `NewtonSolver.cpp`
- [ ] **refinement/**
- [ ] `dolfinx_refinement.h`
- [ ] `interval.h`
- [ ] `mark.h`
- [ ] `option.h`
- [ ] `plaza`
- [ ] `plaza.h`
- [ ] `plaza.cpp`
- [ ] `refine.h`
- [ ] `uniform`
- [ ] `uniform.h`
- [ ] `uniform.cpp`
- [ ] `utils`
- [ ] `utils.h`
- [ ] `utils.cpp`
- [ ] **(top level)**
- [ ] `dolfinx.h`

Review the listed headers and source files under cpp/dolfinx/, beginning with the unchecked entries in common/ and the existing utils.h PR link. Determine the review criteria from the project context before proceeding. Done means the applicable checklist entries are completed and links to resulting PRs are added.

Written by the indexing model from the issue text.