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Getting Started

Welcome to the Effect guides. If you are new to Effect, start with the Onboarding section, which introduces the core concepts in order. These guides explain each topic in more detail, and you can also use them as a reference while you build.

How to Use These Docs

The documentation is structured in a sequential manner, starting from the basics and progressing to more advanced topics. This allows you to follow along step-by-step as you build your Effect application. However, you have the flexibility to read the documentation in any order or jump directly to the pages that are relevant to your specific use case.

You can switch between Effect versions using the version selector at the top of the page.

To facilitate navigation within a page, you will find a table of contents on the right side of the screen. This allows you to easily jump between different sections of the page.

Guide Sections

The guides are grouped by area:

  • The Error Management guides cover typed errors, fallbacks, and retries.
  • The Concurrency guides cover fibers, bounded parallelism, and racing.
  • The Resource Management guides explain how to acquire and release resources safely.
  • The Schema guides cover parsing, validating, and transforming data.
  • The Observability guides cover logging, metrics, and tracing.
  • The Streaming guides show how to build data pipelines with backpressure.

For a complete reference of every module, see the API Reference.

Coding with LLMs

The following article describe how to use Effect with LLMs: https://effect.website/blog/the-one-weird-git-trick-that-makes-coding-agents-more-effect-ive/

When using LLMs it is also very important to optimize the feedback loop to be as tight as possible, that can include writing custom linting rules to fit your style preferences and patterns, an example of a repository optimized for agentic coding can be found at: https://github.com/mikearnaldi/accountability

A key part of optimizing the feedback loop (and the developer experience in general when using Effect) is to use the Effect LSP plugin, we advise using the latest “tsgo” implementation of it that can be found at: https://github.com/Effect-TS/tsgo

Join our Community

If you have questions about anything related to Effect, you’re always welcome to ask our community on Discord.