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Latent cache

Use gamengen-cache-latents only on validated NPZ recording shards. The command loads the revision pinned in the selected configuration and stores one latent per source frame, along with the original transition arrays and source-shard SHA-256.

gamengen-cache-latents --config configs/tier2_doom_lite.yaml \
  --shard data/recordings/shard_000000.npz \
  --output data/latents/shard_000000.npz

A cache is invalid when its source-shard checksum differs. Regenerate it after changing recordings, preprocessing, model revision, or VAE encoding behavior. The cache format is safe NPZ only; it never loads pickle artifacts.