GPT-6 Astra/Sol designed the SFX here Opus 5.5 can do it, too I uploaded my muted video into Codex & asked the agent to edit the audio for it. Watch the result. I built this sound-design pack without DAW or 3rd party samples - just with my brain + AI agent. Here's your SFX pack prompt (save it): [Build an original SFX palette for my short visual edit in Codex, without a DAW or third-party samples. First map the visual events by function: micro-cut, object lock, texture movement, transition,…