Extending the DA report with other features

[j4james]

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@jerch and I have recently been discussing the possibility of extending the primary device attributes report to include another feature number that indicates whether a terminal supports the OSC 52 sequence for copying to the clipboard, and I wanted to see whether this is something you might be interested in.

We don't want to get into a discussion about inventing a whole new protocol for feature reporting, that will likely never be agreed upon. We just want something that's easy for terminals to implement, so it has a reasonable chance of being adopted.

So the question is, would you be open to adding another number in your DA report (possibly 52) to indicate that your terminal supports some form of OSC 52? We can get into the details of what exactly that means later - I just wanted to see if you're interested in the idea at all.