# You Might Not Need An Effect

> Review React code for unnecessary useEffect usage based on react.dev guidelines. Analyses code for useEffect anti-patterns and optionally applies fixes. Use when reviewing React code quality or refactoring effects.

- Skill: `majiayu000/you-might-not-need-an-effect` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/you-might-not-need-an-effect`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/you-might-not-need-an-effect/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/you-might-not-need-an-effect

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<!--
Example prompts:
  /you-might-not-need-an-effect
  /you-might-not-need-an-effect scope=diff to main
  /you-might-not-need-an-effect fix=false
-->

Arguments:

- scope: what to analyze (default: your current changes). Examples: "diff to main", "PR #123", "src/components/", "whole codebase"
- fix: whether to apply fixes (default: true). Set to false to only propose changes.

Steps:

1. Read https://react.dev/learn/you-might-not-need-an-effect to understand the guidelines
2. Analyze the specified scope for useEffect anti-patterns
3. If fix=true, apply the fixes. If fix=false, propose the fixes without applying.