prompts/ltx_audio_relay_system_prompt.txt: audio-timed LTX relay prompt — IMAGE 1 = subject appearance, IMAGE 2 = energy waveform, one beat per audio segment (copy frames), segment NOTES override the energy default. README documents wiring both images into chat mode (subject -> reference_image, waveform -> generated_image). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>