Currently, closing as off-topic adds a notice reading
This question does not appear to be about TeX, LaTeX or related typesetting systems, within the scope defined in the help center.
below the question. The 'new' approach to closing means that 'off-topic' is intended to be used for cases we don't cover 'by convention' as well as those not related to TeX. As such, the text may need to be altered to reflect this.
What I'm looking for is suggestions to improve this line to let people know that 'off-topic' can cover not just 'not about TeX at all' but also 'not within our scope'. (For example, typos in code could fall within this category.)
Having looked at the mod tool which allows a change to the text, I find that we can have separate texts for 'not about TeX' and 'outside of our scope for answering' texts. The current situation is: so we could for example have a custom close reason which covers all of the 'OT by convention' things, and leave the 'not about TeX' one alone (if we wish).