For questions about the Meta site, scifi.meta.stackexchange.com itself.
Since there isn't a scifi.meta.meta.stackexchange.com, questions about the meta site as well as the main site are hosted on scifi.meta.stackexchange.com. Use this tag for them. Questions tagged meta might include:
- bug reports for meta-specific design issues
- discussions of what to do about some tags on meta
- ...
