# 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.