# Fp Errors

> Stop throwing everywhere - handle errors as values using Either and TaskEither for cleaner, more predictable code

- Skill: `ranbot-ai/fp-errors` (Agent Skill)
- Install (CLI): `npx skillmds add ranbot-ai/fp-errors`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ranbot-ai/fp-errors/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ranbot-ai (https://skillmd.com/u/ranbot-ai)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/ranbot-ai/fp-errors

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# Practical Error Handling with fp-ts

This skill teaches you how to handle errors without try/catch spaghetti. No academic jargon - just practical patterns for real problems.

The core idea: **Errors are just data**. Instead of throwing them into the void and hoping someone catches them, return them as values that TypeScript can track.

## 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 need to replace exception-heavy code with `Either` or `TaskEither`.
- The task involves validation, domain errors, or clearer error contracts in TypeScript.
- You want pragmatic fp-ts error-handling guidance for real application code.

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## 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.