# Source provenance

- Upstream repository: <https://github.com/NVlabs/Sana>
- Upstream branch: `sol-engine`
- Upstream commit: `8a26fb0ec9e353125ead798cb2e312d5ce48cded`
- Upstream path: `techniques/sparse_backends/sol_attn`
- Kernel Hub target: `Efficient-Large-Model/Sol-Attn`

`torch-ext/sol_attn` contains the complete upstream package at the pinned
commit. Its only packaging-level changes are semantically equivalent
absolute-to-relative internal imports. Kernel Hub loads each kernel version
under an isolated module name, so hard-coded `sol_attn.*` package imports
would otherwise escape that namespace.

Given a checkout of the pinned Sana commit, verify the file inventory, all
non-import source text, and import semantics with:

```bash
python tools/verify_upstream.py /path/to/Sana
```

The publishing process does not add files, workflows, or commits to
`NVlabs/Sana`.