[idea] Per-pane mute control

[felixhao28]

idea / problem

When the main agent opens many sub-agent panes, each sub-agent plays the configured completion sound when it finishes. This quickly becomes noisy and distracting.

requested change

Please add a per-pane mute option (or just detect HERDR_DISABLE_SOUND=1 on the pane level) that follows the pane lifecycle and only suppresses agent completion/needs‑input sounds (Done and Request). The option should be set at pane creation time and visible in pane metadata.

why you want this

I really like the idea from the herdr youtube video which talks about using herdr to monitor sub-agents. But playing a notification sound each time a sub-agent finishes something is slightly distracting. I only wish to be notified when the main agent finishes.

[JoeRoddy]

for the love of god, yes. claude code is particularly bad at emitting "completion"-like events when its really looping over a large set / doing an interval job.

seems to be less of an issue with codex.