Erlang/OTP 29.0

solid_fuel

Looks like a nice set of improvements. Disabling the SSH daemon [0] by default is a good security change, same with disabling the SFTP by default. I think the io_ansi [1] module sounds pretty cool, imo erlang doesn't have a great story for building complicated CLI applications right now, but I haven't tried much. I imagine having this in the stdlib will be a nice leg up in the future. The way fwrite works seamlessly across nodes is very nice, and exactly what I love to see from erlang. The addition of Native Records [2] is really cool. I'm curious how this will be leveraged in Elixir in the future, since right now I think there is a mix of records, tuples, and maps depending on exactly what is being done. Like the EEP says, I doubt we'll ever see the old records deprecated entirely but this looks like a substantial improvement. [0] https://www.erlang.org/doc/apps/ssh/ssh.html [1] https://www.erlang.org/docs/29/apps/stdlib/io_ansi.html [2] https://github.com/erlang/eep/pull/81

SteveGregory

Can someone please explain the innards?

tmoertel

For anyone wondering what the "OTP" part is in Erlang/OTP, it is a set of libraries and associated principles that, in effect, standardize the creation of highly reliable, fault-tolerant applications, originally for the telecom domain. It's worth checking out the brief introduction to the fundamental ideas in the introduction to "OTP Design Principles": https://www.erlang.org/doc/system/design_principles.html

ch4s3

I'm interested to see how records play out in the ecosystem.

keyle

Added support for -unsafe attributes Right in time for the Rust rewrite! /s

ksec

Does anyone knows if WhatsApp is still based on Erlang?

faangguyindia

Who even uses Erlang? I used Rails and then i tried Phoenix and it was lot more difficult to get things done. I don't understand Phoenix hype For solo devs, Rails is arguably most productive webapp system. LLM is very good at writing ruby rails code. Much better than writing django in my experience even though python training corpus is huge. I write my experimental apps in Rail when it stabilizes, i do a Go rewrite. I don't write directly in Go because, it consumes lot more token when the app scope is unknown but it's very efficient for rails. These day i don't need react or angular anymore, i use Hotwire in Rails and HTMX in Go. Erlang forum itself uses Discourse (written in Rails)

sph

You might want to update prod apps ASAP to this or the latest point version if below 29. Just deployed an app to production, automated security scans found 2 CRITICAL CVEs and half a dozen of HIGH risk ones dated Feb-May 2026.