Tim Smart retweeted
Huge thanks to all our sponsors for helping us bring the Effect community together in Italy this December. 🤍
We're so happy to have you on board!
@zivergetech @EffectfulTech @warpdotco @executorsh @academind_real @Cloudflare @novelcrafter
effect.website/effect-days#s…
ALT Effect Days 2026 banner featuring the event sponsors: Ziverge, Effectful, Warp, Datapizza, Betalyra, Inato, Cloudflare, Academind, Novelcrafter, Executor, and August.
Tim Smart retweeted
This week I cover at-least-once delivery, persisted messages, and the Two Generals’ Problem.
The Two Generals’ Problem is provably unsolvable, just like getting anyone to answer @thefubhy in our team chat.
Runners crash, but with Effect Cluster your messages don't need to go down with them.
This week, learn how to
→ Choose at-most-once or at-least-once delivery
→ Persist messages so they survive a crash
→ Reply only when the work is done
Module of the Week: Cluster, Part 3 ↓
ALT > A sender and a receiver joined by a line, with a lost message falling off the middle. The counters read 2 sent, 1 received.
Tim Smart retweeted
Module of the Week #4 is all about how cluster routes messages to the correct entity without a central coordinator.
I spent way too much time on the visuals for this week's post, but I think it might be the best one yet.
effect.website/blog/module-o…
Effect Cluster, Part 2 - Module of the Week #4
With no coordinator in charge, how does a message find its entity?
This week, we define our first entity and follow one message from webhook to punchline 👨
Questions? Office Hours tomorrow, link in 🧵
effect.website/blog/module-o…
Tim Smart retweeted
Better late than never - this week's Module of the Week is all about RcMap, @EffectTS_ 's reference counted map module.
See you nerds at Office Hours tomorrow!
effect.website/blog/module-o…
Tim Smart retweeted
Effect Days is back 🇮🇹
Join us on December 9–11 for three days with the people building Effect and the people building with it.
Workshops. Talks. Community.
Early Bird tickets are now live ↓
effect.website/effect-days
ALT Effect Days 2026 banner eaturing a large group photo of the Effect community.
Tim Smart retweeted
Effect v4 Release Candidate is here!
After months of beta releases, real-world usage, and community feedback, v4 is entering the final stretch before stable.
Try it, migrate, test your integrations, and tell us what still breaks before 4.0.
↓↓↓
effect.website/blog/releases…
ALT Effect v4 Release Candidate banner. A horizontal timeline shows 3.0 stable on the left, 4.0 RC in the center marked “we are here,” and 4.0 stable on the right.
Tim Smart retweeted
Enjoy a special Cause & Effect episode with @jdegoes, creator of @zioscala, and grandfather of Effect.
@schickling @MichaelArnaldi
00:00 Intro, From ZIO to Effect
06:54 Software engineering in the age of AI
12:34 More developers, but a wider skill gap
23:03 What is still worth learning?
29:40 Closing the loop around coding agents
39:10 Preventing engineering skills from atrophying
47:20 Effect through the eyes of ZIO’s creator
52:42 Why Effect’s primitives matter more with AI
58:05 Teaching coding agents to write good Effect code
1:01:25 Rethinking tests, DRY, and boilerplate
1:08:45 The Effect Companion
1:18:16 A role-playing game for learning Effect
1:25:05 Turning knowledge into a product
Tim Smart retweeted
We shipped a brand-new Effect website.
Take it for a spin, click everything, and let us know what you think.
Bugs, feedback, confusing bits, we want all of it ↓
effect.website
Tim Smart retweeted
Effectifying @opencode with @kitlangton & @schickling
Enjoy a very Kit Cause & Effect episode, technical, funny, opinionated, and full of love for effect systems.
Tim Smart retweeted
We on the @EffectTS_ team we often recommend cloning the Effect repo into your project so your agent can explore the source directly.
I finally wrote up why it works and how to set it up:
effect.website/blog/the-one-…
Tim Smart retweeted
Last week we launched Effect v4 Beta 🚀
If you missed the announcement, here’s a recap of the initial overview -- what changed under the hood, what to expect during the beta phase, and how to approach migration:
youtube.com/watch?v=j7U4Quue…
Tim Smart retweeted
Correction: twitch.tv/timmeeeeeeeeh
Tim Smart retweeted
Happy Anniversary, Erlang!
🥁 And the winner is…
After days of debate, we're excited to announce the official #ErlangAnniversary!
💙 The chosen day is: December 8th, the open-source release date. A win date for everyone!
📊 Check out the vote count:
💙 44 votes: 9 on X, 4 on LinkedIn, 2 on Mastodon, 29 on Erlang Forum (68% from 41 votes + 1 comment vote)
🧡 20 votes: 5 on X, 8 on LinkedIn, 1 on Mastodon, 6 on Erlang Forum (15% from 41 votes)
💚 14 votes: 5 on X, 3 on LinkedIn, 2 on Mastodon, 4 on Erlang Forum (10% from 41 votes)
🖤 2 votes: 0 on X, 0 on LinkedIn, 0 on Mastodon, 2 on Erlang Forum (5% from 41 votes)
💜 2 votes: 1 on X, 0 on LinkedIn, 0 on Mastodon, 1 on Erlang Forum (2% from 41 votes)
Thanks to everyone who participated!
Let's prepare a big celebration for next December 8th!
#Erlang #WeBeamTogether
Tim Smart retweeted
Effect 3.19 has been released! 🚀
→ effect/cluster improvements
→ HashRing module
→ Effect.fn.Return
More in the blog post by @tim_smart:
effect.website/blog/releases…
Tim Smart retweeted
You're absolutely right!—Let's delve into @EffectTS_.
Tim Smart retweeted
🌟 10k times, thank you!
Effect just crossed 10,000 stars on GitHub.
To celebrate, we’re giving away **Effect swag** to a few folks who share how they’re using Effect in the wild!
Tim Smart retweeted
In this Cause & Effect episode, Johannes Schickling @schickling talks with David Golightly about how @MasterClass built Cortex with Effect.
Cortex is the voice AI orchestration layer powering personalized conversations with celebrity instructors like Gordon Ramsay & Mark Cuban
Tim Smart retweeted
🎙 Cause & Effect Podcast – Episode #2
We chat with Michael Fester, co-founder Markprompt, on scaling AI-powered support with Effect & key engineering lessons.
◆ Migrating from TypeScript to Effect
◆ Handling API failures & cyber attacks
◆ Scaling AI infrastructure reliably