All blog.filippo.io posts are tagged with one category (Mainline, Elsewhere, Talks or Technical notes) and zero or more topics (Go, Crypto, ...).
Each tag has a dedicated RSS feed.
Mainline
Original, edited content. The "real" blog.filippo.io posts.
Elsewhere
Links to writings of mine published elsewhere.
Talks
Videos, notes and slides.
Technical notes
Posts of probably zero interest to the blog followers and just meant for Google.
Go
"Don't communicate by sharing memory, share memory by communicating."
Crypto
Because not all crypto is TLS.
TLS
Because crypto is too pleasant without x509.