# Backend Code

> Server-side logic, data processing, and state management

- Skill: `dongduong2001/backend-code` (Agent Skill)
- Install (CLI): `npx skillmds@latest add dongduong2001/backend-code`
- Raw SKILL.md: https://api.skillmd.com/api/skills/dongduong2001/backend-code/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: DongDuong2001 (https://skillmd.com/u/dongduong2001)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/dongduong2001/backend-code

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# Backend Code Skill

This skill handles backend service development, data processing, and integration.

## When to use this skill
- When building APIs, workers, or microservices.
- When interacting with databases, caches, and message queues.
- When implementing business logic and validation rules.

## Guidelines
- Validate and sanitize all incoming data at the API edge.
- Assume network calls and database queries will occasionally fail; implement retries and circuit breakers.
- Decouple business logic from the transport layer (e.g., Controllers should not contain complex logic).
- Log structured data (JSON) and ensure PII is masked.