fp-ts-task-either

Compose asynchronous TypeScript pipelines with fp-ts TaskEither error handling.

11|3|Updated Jan 30, 2026

Search Tags:#TypeScript #pipeline #asynchronous #error-handling #functional-programming #fp-ts #TaskEither

Ready to run

npx skills add https://github.com/whatiskadudoing/fp-ts-skills --skill fp-ts-task-either

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Please help me install this Agent Skill.
Skill: fp-ts-task-either
Source: https://github.com/whatiskadudoing/fp-ts-skills/tree/main/skills/fp-task-either
Command: npx skills add https://github.com/whatiskadudoing/fp-ts-skills --skill fp-ts-task-either

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill provides a principled approach to handling asynchronous operations that may fail, using TaskEither to encode errors and successes in a type-safe, composable manner.

Core Features & Use Cases

Sequential and parallel composition of async tasks with predictable error handling.
Do-notation style workflows and expressive error mapping with TE.mapLeft, TE.orElse, TE.chain.
Real-world scenarios: composing multiple dependent API calls, data validation, and error-tolerant pipelines in a FP TypeScript codebase.

Quick Start

Install and start using TaskEither patterns to orchestrate an API call chain without try/catch blocks.

Frequently Asked Questions about fp-ts-task-either

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I handle asynchronous errors in TypeScript without try/catch blocks?▼

Asynchronous error handling in TypeScript can be managed safely using TaskEither to encode errors and successes in a type-safe, composable manner, replacing try/catch blocks with functional pipelines using pipe, mapLeft, and chain.

What is the best way to compose multiple dependent API calls with predictable error handling in TypeScript?▼

Composing dependent API calls with predictable error handling is achieved by using TaskEither to build sequential and parallel async pipelines, applying functional utilities like chain and orElse to manage data validation and error-tolerant workflows.

How does TaskEither work for lazy asynchronous computations in fp-ts?▼

TaskEither works for lazy asynchronous computations by combining the Task and Either monads, allowing you to compose safe, deferred async operations that explicitly encode failure and success states within the TypeScript type system.

Can I use Do-notation workflows to build async pipelines in TypeScript?▼

Do-notation workflows can be used to build expressive async pipelines in TypeScript, leveraging TaskEither patterns to orchestrate complex sequential tasks and data validation without deeply nested callbacks or manual error propagation.

Do I need fp-ts libraries to implement retry and recovery patterns for async tasks?▼

The fp-ts libraries are required to implement retry and recovery patterns for async tasks, providing the necessary TaskEither, Either, and Task modules along with FP utilities like orElse and mapLeft to compose safe computations.

How do I map errors in an async TypeScript pipeline using functional programming?▼

Mapping errors in an async TypeScript pipeline is done using the mapLeft utility from fp-ts, allowing you to transform error types within a TaskEither workflow while keeping the success channel untouched and maintaining type safety.