Functional Backend Patterns with fp-ts

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Implements type-safe, testable backend architectures for Node.js and Deno using functional programming principles and the fp-ts library.

This skill provides a standardized framework for building robust backends using the ReaderTaskEither (RTE) pattern. It guides developers through implementing functional dependency injection, domain-specific error handling, and modular service composition. By shifting from imperative to functional paradigms, it ensures that side effects are controlled, dependencies are explicitly managed, and the codebase remains highly testable and predictable, particularly in complex Node.js or Deno environments.

主な機能

01Type-safe domain error handling using tagged unions
02ReaderTaskEither (RTE) pattern for unified dependency and error management
03Functional wrappers for database operations including Prisma integrations
04Modular service composition techniques for scalable backend logic
0599 GitHub stars
06Layered functional dependency injection architecture (Config, Infra, Services)

ユースケース

01Implementing structured, exception-free error handling across a TypeScript backend
02Refactoring legacy Node.js services into a type-safe functional architecture
03Building complex API services that require deep dependency injection and testability