Support matrix

This matrix records current release support. Tested means covered by the repository test suite or a documented example. Experimental means the path exists but lacks complete release coverage. Unsupported means do not rely on the combination.

Subsystem	2D	3D	CPU	CUDA	AMDGPU	Metal	Float32	Float64	Uniform grid	Refined grid	MPI
Material particles	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Experimental
Passive markers	Tested	Experimental	Tested	Experimental	Experimental	Experimental	Tested	Tested	Tested	Experimental	Unsupported
Marker chains	Tested	Unsupported	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Experimental
Marker surfaces	Unsupported	Tested	Tested	Tested	Tested	Tested	Tested	Unsupported on Metal	Tested	Experimental	Tested
Phase ratios	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Experimental	Experimental
Subgrid diffusion	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Experimental	Experimental
Checkpoint/restart	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Tested	Experimental	Experimental

Qualification rules

• Metal supports Float32; Metal does not support Float64.

• Refined-grid support means coordinate-vector grids, not only LinRange grids.

• GPU MPI requires a compatible GPU-aware MPI configuration.

• Experimental combinations may work, but are not release guarantees.

• The matrix must change with the test suite and release checklist.