Document how to make area-specific experts feel welcome

[jyasskin]

The TAG is made up of a mix of web platform generalists and experts in particular areas. We also invite Associates to improve our expertise in particular areas. The web platform generalists are familiar with enough of the platform that we can read or skim most explainers and get some sense of what the problem areas are likely to be. However, the area-specific experts (UX and Sustainability have come up recently) can get lots in the explainers. We get so many reviews, that it takes an unreasonable amount of energy for the area-specific to figure out which reviews they can actually help with, which can cause them to burn out on TAG work in general.

This week, we came up with the strategy of having the generalists label design reviews with Focus: UX so that our UX expert can look at just those reviews. TBD whether this works, but I think it's promising, and we should document it here so that future TAGs remember to do it for whatever set of experts we get in the future.

[martinthomson]

The use of focus tags seems reasonable. If the focus tags are clear and reasonable themselves. The UX focus is maybe not the best example (the platform generally doesn't standardize UX), but I think that we also have to make efforts to make the work more accessible for the people who are here, so I'm supportive of having that label.

I want to re-raise the question about whether we need to have "focus: blah (in progress)" and "focus: yawn (complete)". Having those makes the process of managing the tags a multi-step process. I find it better to write a comment saying "we still need to look into X" or "we are seeking external feedback on Y" rather than relying on tags. That would make this focus labeling a one-off and therefore much easier to carry.