middleware-guide

Complete guide to creating and using middleware in backend microservices.

Skills
Development
5

What it does and how to use it

A skill that teaches Claude Code to do development tasks well. It is packaged knowledge the model uses whenever it is relevant.

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Install (Claude Code)

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Content

# Middleware Guide - Express Middleware Patterns

Complete guide to creating and using middleware in backend microservices.

## Table of Contents

- [Authentication Middleware](#authentication-middleware)
- [Audit Middleware with AsyncLocalStorage](#audit-middleware-with-asynclocalstorage)
- [Error Boundary Middleware](#error-boundary-middleware)
- [Validation Middleware](#validation-middleware)
- [Composable Middleware](#composable-middleware)
- [Middleware Ordering](#middleware-ordering)

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## Authentication Middleware

### SSOMiddleware Pattern

**File:** `/form/src/middleware/SSOMiddlew

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