Blog
Technical notes, written down so I stop re-deriving them.
Mostly software and systems, occasionally cognitive science. Written for the version of me who hits the same problem in a year.
A calendar date is not an instant
How a one-line date format shipped the wrong day, and why the fix was a type rather than a patch.
Taking control of my tailnet: Tailscale ACLs and tags
How I use Tailscale access control lists and device tags to keep a growing private network deny-by-default and legible.