Simone Carletti

CTO at @dnsimple. Passionate programmer, Tech/Rec scuba instructor, Sommelier. Interested in programming, internet protocols & online security.

[Rails Camp USA @railscamp_USA]

your 2026 Ruby conference schedule 🗓️

🌿 may
@rubyconfaustria (may 29-31, vienna)

🌊 june
- matsue rubykaigi 12 (june 6, japan)
- @blastoffrails (june 11-12, new mexico)
- @brightonruby (june 25, uk)

☀️ july
- ruby retreat @rubyaustralia (july 3-6, sydney harbour ntl park, water front)
- @rubyconf (july 14-16, las vegas)
- kansai rubykaigi (july 18, japan)

🔥 august
- rubyconf africa @ruby_african (aug 21-22, kenya)
- @RubyforGood (aug 27-30, washington DC)

🏕️ september
- @railscamp_usa (sept 7-11, oregon coast)
- euruko (sept 16-18, czechia)
- @railsworld (sept 23-24, austin)

🍂 october
- tiny ruby #{conf} @HelsinkiRuby (oct 1, finland)
- deccan queen on rails @hideccanqueen (oct 8-9, india)
- @kaigionrails (oct 16-17, tokyo + online)

❄️ november
- helvetic ruby conf, (nov 19-20, switzerland)

[James Hibbard @jchibbard]

📡 The recent “GemStuffer” spam wave used RubyGems like a public dead drop: fetch data, wrap it in a gem, push it to the registry, retrieve it later with standard tooling. A very odd abuse of package infrastructure. https://t.co/KACvc1aNTk

[Simone Carletti @weppos]

Thanks to @theo, @chadfowler, @antonbabenko, Jim Remsik, Dragos Musetescu, and everyone else who shared feedback along the way. 🙏

[Simone Carletti @weppos]

It's here! The new @dnsimple CLI is now available. 🎉

This was a truly exciting project to work on. The best part? Talking with users, customers, and friends of DNSimple to learn how people are combining CLIs with AI/LLM agents.

https://t.co/53h59DOqlH

https://t.co/UCT7CctUVo

[dnsimple @dnsimple]

🎉 Just shipped: the official DNSimple CLI - manage your domains, DNS records, and SSL certificates straight from your terminal or CI pipeline. Read the latest blog post covering the setup, key commands, and real-world use cases 👉 https://t.co/N0fu3k6lTP...

[Simone Carletti @weppos]

It feels like we’re only scratching the surface of what’s possible.

Here's a video showing how to register a domain and point it to @flydotio using the CLI and an LLM in a single conversational request.

[Simone Carletti @weppos]

Hey @Site24x7, I have a ticket that has been open for six months to merge two accounts. Your support has done a poor job handling it, and as of today, the issue is still not resolved. Is there anyone knowledgeable who can assist?

[Simone Carletti @weppos]

I would really have loved to attend @rubyconitaly this year. It has been a while, and I was looking forward to reconnecting with the Italian #Ruby friends. I had to change plans 😕, maybe next year.

[Simone Carletti @weppos]

@headius AMS is underwater. This sounds legit 😆

[Simone Carletti @weppos]

That was one of the main goals for our DNSimple CLI, along with making it super easy to manage your DNS records once you have a zone or for your newly registered domain. I think we nailed it. 🤞

[Simone Carletti @weppos]

How simple is it today to register a domain via CLI or AI, and get your site up and running? 🤯

Here's a short demo of the new @dnsimple CLI. From your local AI agent get name suggestions, check availability, register any combination of domain names, and point it to a service.

[Robby Russell @robbyrussell]

Really enjoyed this conversation with @weppos. Some of my own early web development work involved DNS, so this one was especially interesting to me. We went nearly two hours… because I wanted to get into the weeds.

[Simone Carletti @weppos]

@robbyrussell Thanks for having me @robbyrussell. I still can’t believe we went that long, it just felt like a casual conversation. 😅

[Simone Carletti @weppos]

Had a great time recording this On Rails podcast episode with @robbyrussell. Wild to think @dnsimple is 15+ years old and I've been building with #Ruby and #Rails for nearly 20y. Time flies when you're having fun!

[Ruby on Rails @rails]

The On Rails podcast is back with a new season! In this first episode, host @robbyrussell chats with Simone Carletti (@weppos), CTO of @dnsimple, where Rails has powered the main application and API since they launched in 2010. They chat about what it takes to keep a long-lived codebase healthy with a lean team of around 15 engineers.
🎙️ Listen to the full episode here: https://t.co/A98ZdP9Dwh

[Simone Carletti @weppos]

I'm sure I'm not the first to think of this. But while it's a super simple trick, it works amazingly well.

Sometimes the best solutions are the simplest ones. ✨

[Simone Carletti @weppos]

One of the most exciting use cases for the new @DNSimpleStatus CLI is when paired with your favourite agentic tool. 🤖

https://t.co/IzH8ExbBKi

[Simone Carletti @weppos]

Working on something I'm genuinely excited about: an official CLI for @DNSimple.

Full coverage of the API. Works as a standard CLI tool. But it's been built with AI agentic workflows as a first-class citizen from day one. Currently in private beta.

[Simone Carletti @weppos]

I wanted a solution that didn't require the agent to access the source code or connect to an online resource. So I created a dedicated command that prints out the CLI capabilities as plain text.

$ dnsimple ai

Run it once when you start your agent, and voilà!

[Simone Carletti @weppos]

Scaling, Securing, and Protecting DNS in #Erlang. This talk presented by Nelson at @CodeSyncGlobal takes a look inside the Erlang virtual machine and highlights the key patterns we use to scale our DNS infrastructure at @DNSimpleStatus

https://t.co/QmqNoTpR2C

[Simone Carletti @weppos]

Claude code failing with 401, and @claudeai status page is green.

Please run /login · API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid authentication
credentials"},"request_id":"req_xxx"}

[Simone Carletti @weppos]

@MarkoInLA @bcherny @claudeai @AnthropicAI Confirmed