fp-backend

What problem does it solve?

Backend development often suffers from tangled error handling, brittle dependencies, and testability challenges. This Skill provides functional programming patterns using fp-ts, particularly ReaderTaskEither, to promote type-safe, composable backend code with deterministic dependencies.

Core Features & Use Cases

• Structured dependency injection: Build a predictable dependency graph and pass it through computations without global state.
• Composable service layer: Define services as RTE-based functions that can be assembled into higher-level workflows.
• Prisma-like repository wrappers & error handling: Encapsulate data access with robust, typed error translation and safe composition.
• Middleware and routing patterns: Integrate FP patterns into Express, Hono, or other frameworks with clean error handling.

Quick Start

Create a small sample backend by wiring a dependency container and implementing a ReaderTaskEither-based service.