- Add ParallelBuildExtension that dispatches each extension to a subprocess
- 4 extensions compile concurrently (3m34s → 1m1s on L20, ~3.5x faster)
- Default 8 workers, override with BUILD_PARALLEL=N
- CUDAExtension module names changed from astrai.extension.<name> to astrai.extension.lib.<name>
- Compiled .so files now land in astrai/extension/lib/ instead of alongside Python source
- loader.py imports from .lib.<name> subpackage
- Add astrai/extension/lib/__init__.py to make lib a proper package
- Separates compiled artifacts from Python source for cleaner directory structure
- Add cu128/cu130 build matrix to release workflow
- Parametrize Dockerfile and docker-compose with CUDA_TAG build arg
- Allow csrc/ and setup.py in docker context via .dockerignore
- Add nvcc/torch CUDA version mismatch preflight warning in setup.py
- Add cuda_toolkit_version() helper in csrc/build.py
- Use at::IntArrayRef explicitly to fix ATen overload ambiguity
- Guard kernels with CUDART_VERSION >= 11020 check
- Remove invalid [tool.pip] section from pyproject.toml
- centralize CXX_FLAGS/NVCC_FLAGS in csrc/build.py as single source
- add --use_fast_math, --ptxas-options=-O3,-v, --extra-device-vectorization
- add -march=native -funroll-loops host flags
- setup.py reads shared cxx_flags/nvcc_flags from registry
- sync pure-C test build commands with new flags
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