Add _debug_magi_human_block_parity.py, a standalone script that runs
forward hooks on both the upstream DiTModel and FastVideo MagiHumanDiT,
then writes per-side layer activation logs to:
/tmp/opencode/magi_dit_up_layers.log
/tmp/opencode/magi_dit_fv_layers.log
The logs record (name, shape, abs_mean, sum, min, max) for every hooked
activation, sorted by layer order. This enables side-by-side diff via
`diff /tmp/opencode/magi_dit_up_layers.log /tmp/opencode/magi_dit_fv_layers.log`
to pinpoint the first block where numerical divergence appears — a key
diagnostic step for OQ-6 root-cause investigation.
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
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