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Evan Czaplicki

@acadia.engineering

Designer of elm-lang.org and acadia.engineering

Evan Czaplicki @acadia.engineering · 24/09/2026

I have a bunch of changes that could be Elm 0.19.3. It's basically all "compiler improvements" that will not be visible to users, so I looking for feedback on which aspects sound most interesting. Let me know here or in the more detailed thread! ⬇️ discourse.elm-lang.org/t/help-plann...

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Evan Czaplicki @acadia.engineering · 16/09/2026

It is easy to define per-row security policies with Acadia: ✨ acadia.engineering/blog/simple-... ✨ The compiler then does "symbolic evaluation" at compile time so that in many cases, you pay zero runtime cost for your security guarantees! The example app runs an Elm server too! 🚄

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Evan Czaplicki @acadia.engineering · 09/09/2026

Run an Elm program as a simple HTTP server! ✨ github.com/acadia-engin... ✨ Check out the full client/server/database example written in Elm/Acadia, and please share your results if you evolve it into something cool! Very curious to see what you can make!

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Evan Czaplicki @acadia.engineering · 07/09/2026

Prototyped a little script to run Elm code as a server. Trying out some ideas for `server modules` in Acadia!

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Reposted by Evan Czaplicki

frectonz @frectonz.et · 29/08/2026

Spending my Saturday playing around with Acadia. Feels like i'm doing a detox, no syntax highlighting, no LSPs, no LLMs. @acadia.engineering and @terezasokol.bsky.social cooked with this 👏

helix showing a counter implementation in acadia at the top and that same counter implementation being run via `acadia serve` at the bottom

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Evan Czaplicki @acadia.engineering · 25/08/2026

Acadia gives some interesting guarantees: - No 1+N queries. - All queries terminate. Learn how a query language from the 1970s (Datalog) inspired the key design choices that make these guarantees possible in Acadia's query language! acadia.engineering/blog/solving...

acadia.engineering

Solving the 1+N Query Problem

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Evan Czaplicki @acadia.engineering · 19/08/2026

So relieved that the Acadia release went alright! Thank you to everyone who is trying it out! ❤️ Very energized as discussions on the Discord get going. Lots of fun writing and programming projects ahead! 😊

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Evan Czaplicki @acadia.engineering · 18/08/2026

Acadia is out today! Bringing the benefits of Elm to SQLite and PostgreSQL: - Friendly error messages - Custom types for precise column data - Simple module system for easy reuse Check it out! acadia.engineering/blog/rethink...

acadia.engineering

Rethinking Database Programming

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Reposted by Evan Czaplicki

wolfadex.bsky.social @wolfadex.bsky.social · 11/08/2026

whitebeard.blog/posts/learni...

whitebeard.blog

Learning about myself through Elm

In which the author explains why Elm gives him joy, confesses to a memory that once won a national competition but cannot manage a shopping list, and learns a bit about how his mind works.

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Evan Czaplicki @acadia.engineering · 06/07/2026

New Elm release today! 🎉 0.19.2 🥳 Incremental builds of 850k lines of Elm in <350ms. Gearing up for a batch of smaller releases as we head towards Elm 1.0. elm-lang.org/news/faster-...

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