15 Elixir Libraries I Reach For in 2026
The Hex packages I install on day one of a new Elixir project in 2026 — what each earns its place doing, and the ones I dropped along the way.
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Posts tagged Elixir
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Posts tagged Elixir
Build an AI Agent Loop in 50 Lines of Elixir
Every AI agent framework runs the same loop: observe, decide, act, repeat. Here it is in 50 lines of Elixir — no framework, just a GenServer.
RAG in Phoenix: Hand-Rolled pgvector or Arcana?
You don't need a vector database — the Postgres you already run does RAG fine. The hand-rolled pgvector path in Phoenix, and when Arcana earns its place.
Elixir's BEAM Is the Runtime AI Agents Want
Go won the agent daemon and Python owns the reasoning — but the layer nobody claimed is the one that bites you: thousands of long-lived, stateful, crash-prone agents you must keep alive. That's the BEAM's home turf.
Elixir Is the Language AI Codes Best
A Tencent benchmark across 20 languages found Elixir at the top of LLM code-completion rates — Claude Opus 4 hit 80.3% on Elixir vs 74.9% on C#. The reasons aren't an accident; they're the same boring properties that have always made Elixir pleasant, now compounded by AI.
Elixir's Concurrency Model Is the One You Actually Want
async/await and goroutines solve scheduling. The BEAM solves failure. Why most concurrency pain is actually failure-isolation pain — and only the actor model plus supervision trees fix it.
The Ruby to Elixir Migration That Cut Our Service Footprint From Ten to Six
We started with ten Ruby and Elixir services serving real-time messaging for 450K students across 900+ universities. Two years later we had six, fully Elixir, and on-call alerts had halved. The migration order, the patterns we leaned on, and what I'd do differently today.