Replace hf_hub_download (index-only canary) with snapshot_download using
allow_patterns=["base/*.safetensors", "base/model.safetensors.index.json"].
The old approach returned the parent of the index file, which could be a
symlink-resolved HF cache path that lacked the actual shard blobs. The new
approach verifies that at least one .safetensors shard is present before
returning the candidate directory, preventing false-positive skip decisions.
Applies to test_magi_human_parity.py, test_magi_human_pipeline_parity.py,
and the new _debug_magi_human_weight_diff.py debug script (which uses the
same loader pattern for weight-diff analysis).
tests/local_tests/ holds local-only parity, smoke, and component tests
organized by model family (e.g. tests/local_tests/ltx2/,
tests/local_tests/stable_audio/). They typically require a checked-out
reference repo and/or model weights and are skipped in CI; see each family's
README.md for setup. The top-level
tests/local_tests/README.md is the family index.
The CI-backed test suite still lives in fastvideo/tests/.
SolitaryThinker
e6b15fc4de