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How do you manage your SSH private keys? Separate keys on each of your devices? Stored in secure enclave where available? Or the same key(s), copied over manually? Or via a password manager that has ssh-agent functionality? Life was simple when I only had a laptop and phone. Now I need a plan.

Separate keys for each device. Once created, it’s added to GitHub. And then on the new device, I use ssh-import-id to “sync” all my other keys.

Isn't wanton ssh-import-id a bit of a security risk? It depends on your GitHub account being secure and it's potentially adding too many keys to a server that's now vulnerable to any of your devices becoming compromised.

There is some risk of course, but I usually rotate keys in maybe six months or so, all my accounts have 2FA, other measures etc. which help a bit I had some incident losing access because one of my devices crashed so then I switched to the GitHub route for the convenience. This reminded me of:

I’ve never used such a setup so don’t have any good ideas for this.