The fp32 VAE that every v1 preprocessing task except text_only needs is a resolution step (derive_video_preprocess_vae_precision) instead of an override that the entry point applied after materialization, so the PipelineConfig carries it too. Sections of a resolved config pickle on their own, so a DataLoader worker can receive one. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012M91wnVFmPEvJ9h39r5BH7