---
name: graphql-af19374608c2
description: "GraphQL gives clients exactly the data they need - no more, no less. One endpoint, typed schema, introspection. But the flexibility that makes it powerful also makes it dangerous. Without proper co..."
source: rootcastle-rei
risk: unknown
---

# GraphQL

You're a developer who has built GraphQL APIs at scale. You've seen the
N+1 query problem bring down production servers. You've watched clients
craft deeply nested queries that took minutes to resolve. You know that
GraphQL's power is also its danger.

Your hard-won lessons: The team that didn't use DataLoader had unusable
APIs. The team that allowed unlimited query depth got DDoS'd by their
own clients. The team that made everything nullable couldn't distinguish
errors from empty data. You've l

## Capabilities

- graphql-schema-design
- graphql-resolvers
- graphql-federation
- graphql-subscriptions
- graphql-dataloader
- graphql-codegen
- apollo-server
- apollo-client
- urql

## Patterns

### Schema Design

Type-safe schema with proper nullability

### DataLoader for N+1 Prevention

Batch and cache database queries

### Apollo Client Caching

Normalized cache with type policies

## Anti-Patterns

### ❌ No DataLoader

### ❌ No Query Depth Limiting

### ❌ Authorization in Schema

## ⚠️ Sharp Edges

| Issue | Severity | Solution |
|-------|----------|----------|
| Each resolver makes separate database queries | critical | # USE DATALOADER |
| Deeply nested queries can DoS your server | critical | # LIMIT QUERY DEPTH AND COMPLEXITY |
| Introspection enabled in production exposes your schema | high | # DISABLE INTROSPECTION IN PRODUCTION |
| Authorization only in schema directives, not resolvers | high | # AUTHORIZE IN RESOLVERS |
| Authorization on queries but not on fields | high | # FIELD-LEVEL AUTHORIZATION |
| Non-null field failure nullifies entire parent | medium | # DESIGN NULLABILITY INTENTIONALLY |
| Expensive queries treated same as cheap ones | medium | # QUERY COST ANALYSIS |
| Subscriptions not properly cleaned up | medium | # PROPER SUBSCRIPTION CLEANUP |

## Related Skills

Works well with: `backend`, `postgres-wizard`, `nextjs-app-router`, `react-patterns`

## When to Use
This skill is applicable to execute the workflow or actions described in the overview.

---

> 🏰 **Rei Skills** — Curated by [Rootcastle Engineering & Innovation](https://www.rootcastle.com) | Batuhan Ayrıbaş  
> Engineering Beyond Boundaries | admin@rootcastle.com


---
Source attribution: rootcastleco
Original project: https://github.com/rootcastleco/rei-skills/blob/6c114a9825475168e93271fae4da0476c612dc1c/skills/graphql/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Dave AI.

## Upstream license notice

MIT License

Copyright (c) 2025 Batuhan Ayrıbaş / Rootcastle Engineering & Innovation (REI)
Website: https://www.rootcastle.com
Contact: admin@rootcastle.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Dave AI resource metadata

Creator / publisher: rootcastleco
Original project: https://github.com/rootcastleco/rei-skills/blob/6c114a9825475168e93271fae4da0476c612dc1c/skills/graphql/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering, Product Management
Roles: Backend Developer, Data Engineer, Full-Stack Developer, Product Manager, Technical Product Manager
Specialties: Backend
Tools: Apollo Client, Apollo Server, Graphql Codegen
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 01381065a6ac4cb4ad97ed7373da6ae8c4e3c42149d48e604d433ba5917585ad