Make prompts editable (not just the custom ones)

[gpythomas]

Would it be possible to make copilot prompts editable, i.e., not just custom prompts but also the ones that come bundled with copilot? Occasionally these prompts might not behave as intended.

To illustrate, "Summarize selection" just translated a selection of English text to Spanish. Not sure why the LLM did that since Spanish text tends to be longer. But anyway, it would be useful to edit that prompt and add an instruction to keep the output in English. This is just one example.

I could of course create a custom prompt that is a variant of a non-custom prompt but that's not an elegant solution (duplicating prompts).

If that's already possible, how can I do that? Non-custom prompts don't show up in the "Edit custom prompt" window.