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>