Both replace what a block allocates, which crashes aimdo's compiler (seen on a
rental with v4's shadow negative). Attached to the model, so any sampler.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Block repeat's video-only mode now really keeps audio single-pass: H3 blocks
write in place, so v4 restored audio from an already-repeated stream.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>