home / skills / jeremylongshore / claude-code-plugins-plus-skills / error-handler-middleware

error-handler-middleware skill

/skills/06-backend-dev/error-handler-middleware

This skill provides automated guidance and production-ready error handler middleware configurations to improve backend reliability.

npx playbooks add skill jeremylongshore/claude-code-plugins-plus-skills --skill error-handler-middleware

Review the files below or copy the command above to add this skill to your agents.

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SKILL.md

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---
name: "error-handler-middleware"
description: |
  Manage error handler middleware operations. Auto-activating skill for Backend Development.
  Triggers on: error handler middleware, error handler middleware
  Part of the Backend Development skill category. Use when working with error handler middleware functionality. Trigger with phrases like "error handler middleware", "error middleware", "error".
allowed-tools: "Read, Write, Edit, Bash(cmd:*), Grep"
version: 1.0.0
license: MIT
author: "Jeremy Longshore <[email protected]>"
---

# Error Handler Middleware

## Overview

This skill provides automated assistance for error handler middleware tasks within the Backend Development domain.

## When to Use

This skill activates automatically when you:
- Mention "error handler middleware" in your request
- Ask about error handler middleware patterns or best practices
- Need help with backend skills covering node.js, python, go, database design, caching, messaging, and microservices architecture.

## Instructions

1. Provides step-by-step guidance for error handler middleware
2. Follows industry best practices and patterns
3. Generates production-ready code and configurations
4. Validates outputs against common standards

## Examples

**Example: Basic Usage**
Request: "Help me with error handler middleware"
Result: Provides step-by-step guidance and generates appropriate configurations


## Prerequisites

- Relevant development environment configured
- Access to necessary tools and services
- Basic understanding of backend development concepts


## Output

- Generated configurations and code
- Best practice recommendations
- Validation results


## Error Handling

| Error | Cause | Solution |
|-------|-------|----------|
| Configuration invalid | Missing required fields | Check documentation for required parameters |
| Tool not found | Dependency not installed | Install required tools per prerequisites |
| Permission denied | Insufficient access | Verify credentials and permissions |


## Resources

- Official documentation for related tools
- Best practices guides
- Community examples and tutorials

## Related Skills

Part of the **Backend Development** skill category.
Tags: nodejs, python, go, microservices, database

Overview

This skill automates common tasks around error handler middleware for backend services. It helps design, implement, and validate middleware that captures, logs, and formats errors consistently across Node.js, Python, and Go stacks. Use it to generate production-ready code snippets, configuration examples, and remediation steps.

How this skill works

The skill inspects your request for mentions of error handler middleware and activates relevant patterns and templates. It produces step-by-step guidance, sample middleware implementations, and recommended configuration for logging, monitoring, and safe error responses. Outputs are validated against common standards like structured logging and secure error exposure rules.

When to use it

You need a consistent error handling layer across services or frameworks
You want production-ready middleware code for Node.js, Python, or Go
You need guidance on error response formats and security best practices
You are designing centralized logging, tracing, or alerting for errors
You want to validate middleware behavior against standards and common pitfalls

Best practices

Return minimal error details to clients; expose internal info only to logs
Centralize logging and include structured context (request id, user id, trace)
Classify errors (client vs server) and map to appropriate HTTP status codes
Ensure idempotent and safe error handlers that don’t mask stack traces in logs
Integrate with observability tools (APM, metrics, alerts) and test failure scenarios

Example use cases

Generate an Express.js error handler that logs structured events and returns sanitized JSON responses
Create a Python Flask middleware example that maps exceptions to HTTP codes and reports to Sentry
Draft a Go HTTP middleware that recovers from panics, logs context, and emits metrics
Validate an existing middleware implementation against common misconfigurations and suggest fixes
Design a pattern for microservices to propagate standardized error payloads and trace IDs

FAQ

Does the skill produce code for multiple languages?

Yes. It provides idiomatic examples for Node.js, Python, and Go and can adapt patterns to your stack.

Will it expose stack traces to clients?

No. Generated examples default to safe responses for clients and send detailed traces to logs or observability systems only.