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Effect Documentation

This Week in Effect - 2025-12-19

Davide Scognamiglio
Davide Scognamiglio
Project Manager
 Mirela Prifti
Mirela Prifti
Community Manager
 Michael Arnaldi
Michael Arnaldi
BDFL

Hi Effecters!

Welcome back to This Week In Effect (TWIE) - your weekly update of the latest developments in the Effect community and ecosystem.

Effect is a powerful TypeScript library that helps developers build complex, synchronous, and asynchronous programs. One key feature that sets Effect apart is how it leverages structured concurrency to provide features such as async cancellation and safe resource management, making it easier to build robust, scalable, and efficient programs.

To get started, below you’ll find links to our documentation as well as our guide for installing Effect. Enjoy!

Recent major updates:

 

Technology

Another sneak peek of an upcoming Schema V4 feature from Giulio Canti: sending a subset of Schemas over the wire and restoring it.

Here are all the technical changes from the past week.

Effect Core

Effect CLI

Effect Opentelemetry

Effect Platform

 

Cause & Effect Podcast | Episode #7

Reliable Payroll Systems in TypeScript with Effect

In this episode, Johannes Schickling talks with Adam Rankin, CTO at Warp, about using Effect to bring structure and composability to a growing TypeScript codebase, enabling a small, fast-moving team to stay productive while shipping reliable payment & payroll systems.

Play

Cause & Effect features stories from software engineers and companies that use Effect in production. Each episode explores their journey of adopting Effect, including the learning process, challenges faced, and benefits of integrating Effect into their tech stack.

The Cause & Effect podcast is hosted by Johannes Schickling and available on YouTube, X(Twitter), and audio platforms like Spotify and Apple Podcast.

 

Community Events

This week, we wrapped up our final meetup of the year in Vienna, featuring talks by Mattia Manzati and Sebastian Lorenz on error handling and using Effect on the frontend.

To stay updated about future events, visit our Effect Community Events calendar and subscribe for updates.

 

Community Highlights

 

 

 

  • fx-fetch a production-ready solution for safe & simple HTTP fetching built with Effect. Project by Adam Josefus

 

  • We 🤍 Sam Goodwin.
    sam
    sam
    @samgoodwin89
    · Follow

    I now have roughly 100 tests for all the different ways a plan can fail and then recover. @EffectTS_ makes this so damn easy to do, check it out: This `fail` utility can inject failures into resource providers, but only in the context of the passed in Effect.

    Image
    sam
    sam
    @samgoodwin89

    Have been chipping away on Alchemy-effect's IaC engine while traveling and just landed huge improvements to durability and convergence. Everything except rollbacks are now implemented and it can recover from complicated crashes at any point while applying a plan.

    104
    Reply
    Read 1 reply

 

 

Effect Content Update

 

Effect Job Opportunities

More and more companies are adopting Effect in their projects. Here’s a list of companies looking for software engineers with Effect experience:

Disclaimer: Please note that these job postings are shared for informational purposes, and we encourage applicants to verify details directly with the hiring companies.

 

Effect Merch Store

The Effect Merch Store offers a selection of Effect-branded items designed for the community. All orders are processed and fully managed through Printful.

 

Closing Notes

That’s all for this week. Thank you for being a vital part of our community. Your feedback is highly valued as we fine-tune this format. Feel free to share your thoughts, and we’ll do our best to tailor it to the needs of our community.

Effect Community Team

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