Christian Alexander

Software engineer. Elixir at home, JS at work.

[Effect | TypeScript for the AI Era @EffectTS_]

Effect v4 is here.

One ecosystem. Zero dependencies.

The next chapter of Effect and the foundation for building reliable software and AI agents in TypeScript.

[Christian Alexander @RootCert]

I couldn't resist the @typesafeai / @EffectTS_ hype.

Here's a demo repo using Effect's Jev support to match vulnerability descriptions to CWEs!

https://t.co/bUPaZtthew

[Christian Alexander @RootCert]

Laya is an open-weight decision model like Jev. Its authors, ConvAI, published a related paper over a year ago.

Elixir's Nx was built for running models with native acceleration.

I combined these so anyone can run a decision model within an Elixir app!
https://t.co/cx5W8gYOLg

[Christian Alexander @RootCert]

@tim_smart @EffectTS_ Really exciting! Is there a reason criteria is required for Decision.probability when it is optional for the underlying providers?

[Christian Alexander @RootCert]

@mikehostetler Codex loves gb_trees

[Christian Alexander @RootCert]

@codestirring At this rate they could pick any day that ends in “y” to time with a GitHub outage 🙃

[Christian Alexander @RootCert]

Specifically, this breaks the design down into
- System Context
- Containers
- Components
- Code

With diagrams and commentary.

https://t.co/zedBsNHkoQ

[Christian Alexander @RootCert]

Reviewing AI-written system design docs is hard.

To help get my bearings, I use a simple prompt: “Provide a C4 model analysis of the described system”

It turns out that the same techniques that make human-designed systems understandable apply to LLMs!

[Christian Alexander @RootCert]

@ZachSDaniel1 @shahryar_tbiz Incredible! One of the first libraries to support it from what I can tell!

[Christian Alexander @RootCert]

@ZachSDaniel1 @shahryar_tbiz Does it support Client ID Metadata Documents? I know Dynamic Client Registration is being deprecated

[Christian Alexander @RootCert]

TypeScript can be surprisingly robust with @EffectTS_.

The latest Code and Stuff video walks through some of the parts I like: retries, structured concurrency, error handling, and dependency injection.

All with great type safety!

https://t.co/BndtjkKGz7

[Elixir by Software Mansion @swmansionElixir]

We’ve just released LiveStash v1.0.0 for Phoenix LiveView! 🎉

What’s new?
⚡ Mnesia adapter with cluster state replication and split-brain auto-heal
🔒 Explicit security configuration for browser memory storage
🛡️ Stability & performance improvements (more on that in 🧵)

[Christian Alexander @RootCert]

@ZachSDaniel1 It’s a bummer A2A never happened

[Christian Alexander @RootCert]

@supabase This makes way too much sense, congrats on the launch.

[Christian Alexander @RootCert]

I need to get something off my chest: I’ve recently gotten into @EffectTS_.

I’m not leaving Elixir (not by a long shot) but Effect has made TypeScript palatable in a way I didn’t expect.

Who would be interested in some Effect videos? What do you want to know?

[Christian Alexander @RootCert]

I’ve been using @luckymarmot Paw since the paid license days. Since then, it’s changed hands to RapidAPI and more recently Nokia.

It’s a bummer that they’ve stopped updating it. Without PKCE / MCP support, I’ve been using it less and less.

Is there a good Mac-native successor?

[Christian Alexander @RootCert]

@AshFramework This project wouldn't have been possible without @teamalembic's work on Ash Authentication and @tvlabs' fantastic Lua library!

[Christian Alexander @RootCert]

Learn how to add OAuth, MCP, and a Lua-based code mode to any @AshFramework application in the latest Code and Stuff video!

#MyElixirStatus

https://t.co/TtYVkDR80O

[Christian Alexander @RootCert]

It's been a while, but I'll be combining a few new Ash packages to build a code mode MCP server with OAuth support in the next Code and Stuff video, coming soon!

The way auth and policies flow into a new protocol is what has me so excited about the core abstractions of Ash!

[José Valim @josevalim]

Elixir v1.20 released! Now officially a gradually typed language: Elixir type checks every single line of code, finding bugs and dead code, without developer overhead (no typing signatures) and extremely low false positives rate. Plus a faster compiler! Links and reports below.