I hadn't seen herdr until just now but I built a similar tool with it's own keyboard bindings https://github.com/hadlock/cscope . Claude Code changed some underlying changes to copy-paste so it needs updating. But I think this kind of "I wish my workspace did this/had these features" is a pretty common trope. It is about $10 worth of your employer's monthly token allocation (or personal account if you pay for one) and then improves output so I call it a win-win. Mine is a bit more chaotic, 80s era neon color scheme but accomplishes the same feature. All those "personal tooling" blog posts get voted up for a reason.

TL;DR why would I accept someone elses' vibe coded tool, when I can build my own to my exact specification?