# General Patterns

> Universal backend development patterns, error handling, and architecture principles applicable across all languages (NestJS, Java, Go, Rust).

- Skill: `takayatomose/general-patterns` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add takayatomose/general-patterns`
- Raw SKILL.md: https://api.skillmd.com/api/skills/takayatomose/general-patterns/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: takayatomose (https://skillmd.com/u/takayatomose)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/takayatomose/general-patterns

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# Skill: General Backend Patterns

## Overview

Language-agnostic patterns for backend development applicable across NestJS, Java, Go, and Rust.

## Rule Categories

| Priority | Category | Impact |
| :--- | :--- | :--- |
| 1 | [Universal Patterns](rules/patterns.md) | HIGH |
| 2 | [Error Handling](rules/errors.md) | HIGH |

## Core Expertise

- **Architecture Layers**: Presentation, Application, Domain, and Infrastructure isolation.
- **Multi-Tenant Isolation**: Context extraction and mandatory tenant validation.
- **Event-Driven Architecture**: Cross-module communication via domain events.
- **Persistence Strategy**: Relational (PostgreSQL), Append-Only (MongoDB), and Ephemeral (Redis).

## Instructions for the Agent

- **Consult Internal Rules**: Always refer to the `rules/` directory within this skill for universal business logic and error handling standards.
- **Layer Integrity**: Never skip layers; Presentation must go through Application which uses Domain.
- **Cross-Module Calls**: Never call repositories directly across module boundaries; use events.