10.5.1.1

Highlights

• Python 3.15: wheels for CPython 3.15 and free-threaded 3.15t (#157, #159)
• WebAssembly wheels for Pyodide (PEP 783 pyemscripten, Python 3.13 and 3.14), so
  await micropip.install("suitesparse-graphblas") works in Pyodide 314 (Python 3.14) and
  0.29.4+ (Python 3.13), and in JupyterLite. GraphBLAS runs single-threaded there. (#158)
• Memory-safety fixes: NumPy ≥ 2.5 allocates array data with a different allocator, so
  serialize_matrix/serialize_vector and binread could abort on free-threaded 3.15 or
  under PYTHONMALLOC=debug. Arrays that share memory with GraphBLAS now carry a NumPy
  memory handler (NEP 49) that matches the GraphBLAS allocator (including GraphBLAS ≥ 10.4
  memory arenas) that frees them. (#157)

suitesparse_graphblas.utils (#157)

• New give_buffer(...): a context manager that hands an array's data to a GraphBLAS
  function that takes ownership (e.g. GxB_Matrix_pack_CSR, GxB_Vector_load). It copies
  when GraphBLAS can't own the data, and commits only if GraphBLAS actually took it.
• New empty(...): allocates an array that GraphBLAS can always take ownership of.
• New can_unclaim_buffer(array, arena=None).
• claim_buffer and claim_buffer_2d take an optional arena argument.
• Behavior change: unclaim_buffer now raises ValueError when GraphBLAS can't safely
  own the data: a view, a read-only array, an object dtype, or memory from another allocator
  (e.g. NumPy-allocated arrays with memory_manager="c", or a custom NumPy memory handler).
  Use give_buffer, or check can_unclaim_buffer first.

Other fixes

• initialize() raises if GraphBLAS fails to initialize, instead of continuing silently. (#157)
• binread allocates with GraphBLAS's allocator instead of libc malloc, and reads iso
  matrices correctly. binwrite restores the matrix if writing fails. (#157)

Platform and packaging changes

• macOS arm64 wheels now require macOS 15 (previously 14), because GitHub is retiring
  its macOS 14 runners. (#159)
• PyPy wheels now target PyPy 8.0 (pypy311_pp80). PyPy 7.3 can't install them and will
  build from the sdist. Windows PyPy wheels are no longer built. (#159)
• Wheels no longer include build-only .c/.h sources, so they are smaller. (#158)
• Releases are now published with PyPI Trusted Publishing instead of an API token. (#157)

Maintenance

cibuildwheel 4.3. GitHub Actions are pinned to commit SHAs with least-privilege permissions,
and actionlint/zizmor/pysentry checks were added. pytest is stricter (warnings are errors),
and new memory tests run under PYTHONMALLOC=debug. suitesparse.sh now stops at the first
failure and uses the CMake option names GraphBLAS honors (GRAPHBLAS_COMPACT,
GRAPHBLAS_JITINIT). (#157, #158, #159)