06 — Cosmos CV4x8x8 encoder verification
Same tests as 02 + 03, but with Cosmos CV4x8x8 (encoder JIT from
nvidia/Cosmos-0.1-Tokenizer-CV4x8x8).
- A_synthetic_input_bias: gray-192 max/mean ratio = 1.6× (VideoVAE+ base was 4.5×). Right-bottom hotspot much weaker.
- C_temporal_identity_*: for each stream, encode 16 identical raw frames → 5 Cosmos latent frames. All 5 frames identical to 4 decimal digits (drift mean = 0.0000, bf16 precision noise). Perfect causal identity.
Verifies Cosmos is strictly causal and has no temporal boundary bleed architectural artifact.