I think if anything there is far too much thinking going on here, for the tiny example I copied from the window I literally already had open with the function I was working on.

For what it's worth, Copilot (correctly) inferred a loop variable called "detection", I imagine based on similar usage earlier in the function. And there is already a conditional in place to prevent invalid operations; if I remove it I see a new suggestion:

  if len(filtered) > 0 {

This tool is far from perfect, but it very much sounds like you folks haven't used it. If that's the case, I would encourage you to research it like all tooling and draw some informed conclusions about it's applicability instead of making assumptions.