Composer stage after final assembly?

First, the disclosure: I work on Sonilo (licensed video-to-music), so this suggestion involves our product.

ViMax covers voice and sound effects, but the assembled film ships without music. Since the whole pipeline is agentic (Director, Screenwriter, Producer...), a Composer felt like the natural missing member: after the final cut is assembled, it sends the video to a music model and muxes the returned track.

Sonilo's video_to_music generates the track from the finished cut itself, so the music follows the edits and the emotional arc rather than a text description. Length matches automatically. Output is licensed and safe for commercial use (terms apply).

Integration is small: one API call on the assembled mp4 plus an ffmpeg mux. General recipe here: https://github.com/cindyxu1030/sonilo-video-to-music-cookbook

Would a PR for this be welcome? Happy to follow whatever agent structure you'd want it in.