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---
name: fp-backend
description: Functional programming patterns for Node.js/Deno backend development using fp-ts, ReaderTaskEither, and functional dependency injection
category: Development & Code Tools
source: antigravity
tags: [typescript, node, ai]
url: https://github.com/sickn33/antigravity-awesome-skills/tree/main/skills/fp-backend
---
# fp-ts Backend Patterns
Functional programming patterns for building type-safe, testable backend services using fp-ts.
## Detailed Guide
Read [the detailed guide](references/detailed-guide.md) before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.
## When to Use
- You are building or refactoring a Node.js or Deno backend with fp-ts.
- The task involves dependency injection, service composition, or typed backend errors with `ReaderTaskEither`.
- You need functional backend architecture patterns rather than isolated utility snippets.
## Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
