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2 months ago@sem staffed support is on GitHub and the support team contactable at tailscale.com/support, Reddit, fediverse and IRC and so on we check in on periodically, but they’re mostly better for low urgency discussion / design topics as they’re not staffed.
@sem ideally just bugs and feature requests there - if you have e.g. architecture questions or the like our support team are true experts in those areas and very happy to help. There’s a good amount of community feedback for that kind of thing on Reddit too, but again, true expertise from our support team!