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Effect Documentation

This Week in Effect - 2026-02-13

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

Here are all the technical changes from the past week.

Effect Core

Effect Platform

Effect SQL

 

Community Highlights

  • sluice-orm - A type-safe MongoDB aggregation pipeline builder where every stage’s output type becomes the next stage’s input, fully inferred with zero runtime overhead. Project by DrTtnk.

 

  • effect-viz - An Effect runtime visualizer for understanding the execution of Effect code in the browser. Project by topheman.

 

  • bsky-cli - An agent-first CLI for accessing Bluesky and the AT Protocol. A command-line tool to sync and query Bluesky data from various sources into local SQLite databases, with emphasis on being operable by AI agents through structured error handling and machine-readable output. Project by mepuka.

 

  • EffectPatterns - A community-driven knowledge base of practical patterns for Effect-TS, helping developers progress from foundational concepts to advanced architectural strategies has been updated with 81 new patterns, 75 of which are Effect Schema patterns. Project by PaulJPhilp.

 

  • effortless-aws - A TypeScript framework for building on AWS serverless that handles infrastructure derivation from code, automatic bundling, and typed cross-resource communication without configuration files or state management overhead. As the author kondaurovDev shares: “Effect-ts helped manage the complexity (AST parsing, bundling, AWS orchestration). But more importantly — I control the Lambda runtime, so I can inject deps, batch-fetch SSM params, wire IAM permissions, add observability — all transparently before your code runs.”

 

  • effect-tg - An effectful library for crafting Telegram bots, featuring complete type definitions for the Telegram Bot API, a unified message sending API, JSX syntax support for formatted text, and typed error handling. Project by grom-dev.

 

  • tennyson.ts - A personal monorepo by tennysontbardwell featuring an AI agent framework built with Effect, using the Schema module to specify agent output formats. The project also leverages Effect as a replacement for RxJS in data pipelines, taking advantage of Option, Either, explicit error handling, and hashable data constructors.

 

 

Effect Content Update

  • Implementing Effect from scratch: Laziness, Composition, and Practical TypeScript (Office Hours 15)
Play

 

  • Discussing Lalph - Tim’s AI Agent Orchestrator
Play

 

  • Effect Office Hours 16 went live on Wednesday on X(Twitter)! The edited version will be on our YouTube channel soon.

 

Cause & Effect Podcast

Don’t forget to listen to our Cause & Effect podcast hosted by Johannes Schickling and available on YouTube, X(Twitter), and audio platforms like Spotify and Apple Podcast.

Adam Rankin, CTO at Warp, joined Johannes Schickling to talk 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

 

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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