Reduces prompt approvals from ~30 per batch to 2 (one manifest write,
one batch run). audio-generate --post chains trim+normalize+convert
after generation. audio-batch processes a JSON manifest of multiple
assets sequentially, supporting both SAO generation and harmonic
synthesis methods. Includes --dry-run, --only, and --skip-existing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>