Plan 1 was written against an older cudarc device-centric API. cudarc 0.19
moved alloc/launch ownership to the stream (partly for CUDA Graph capture
hygiene). This addendum pins:
- MlDevice -> CudaContext -> CudaStream construction
- Cubin load + module + function caching
- MappedF32Buffer staging -> DtoD-async -> CudaSlice (canonical CPU->GPU)
- Slow-path readback via DtoD into a staging MappedF32Buffer
- launch_builder(&func).arg(...).launch(cfg) idiom
- IsvBus and MappedPinnedSnapshotSlot/FillSlot using the real
MappedF32Buffer API (host_slice_mut, read_all, dev_ptr field)
- CUDA Graph A capture via stream.begin_capture / end_capture / instantiate
Plan 1 kernel .cu source, CPU oracles, finite-diff thresholds, smoke
criteria, and gate logic are unchanged. Only Rust binding code uses
these patterns.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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