Qwen4-exp test checkpoint

This BF16 fixture is inference-optimization/Qwen3.8-Flash-Next-0.2B-A0.2B at revision 5cdc1eff790ad299680eda7b97241068224581e4 (MIT). It has four decoder layers and no MTP weights. The weights and tokenizer are stored in Git LFS; the other files are ordinary Git files.

mise install
mise exec -- git lfs install --local
mise exec -- git lfs pull
cargo test --release --test import -- --ignored --test-threads=1

The tests pack into temporary directories, compare Metal prefill and decode with the CPU reference, and run CLI generation. They also check mapped tensor views and indexed-store ownership through source removal, variant replacement, and garbage collection. The full fixture suite requires Apple Silicon. The default unit suite does not load it.

To clone without fetching the fixture, set GIT_LFS_SKIP_SMUDGE=1 for the clone.