# Mern Nfr

> Non-functional requirements checklist for MERN features

- Skill: `majiayu000/mern-nfr` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/mern-nfr`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/mern-nfr/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/mern-nfr

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## Purpose

Ensure MERN stories address NFRs. Complements security policies and stack conventions.

## MERN-specific concerns (always consider)

1. **MongoDB efficiency** — query patterns, indexing assumptions, pagination for large collections
2. **Schema migrations** — Mongoose schema changes need migration/compatibility strategy
3. **API resilience** — idempotency for mutations, rate limiting on expensive/public endpoints, graceful degradation
4. **Next.js rendering** — appropriate rendering strategy (SSR/SSG/client) for the use case
5. **Operability** — config/env differences, safe rollout/rollback, feature flags if risky

For standard concerns, output format, and flexibility rules, see `/shared-nfr`.