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Agent skill

Error Handler Middleware

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Manage error handler middleware operations. An agent skill from jeremylongshore/tons-of-skills-marketplace.

MITAuto-check passedBackend & APIs

Install Error Handler Middleware

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill error-handler-middleware -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace error-handler-middleware --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/06-backend-dev/error-handler-middleware .claude/skills/error-handler-middleware && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
error-handler-middleware
GitHub stars
2.8k
Token cost
~584 tokens
SKILL.md length
196 words
Files
1
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Manage error handler middleware operations. An agent skill from jeremylongshore/tons-of-skills-marketplace.

  • Works in 4 steps: Provides step-by-step guidance for error… → Follows industry best practices and… → Generates production-ready code and… → …
  • : error handler middleware
  • SKILL.md covers Overview, When to Use, Instructions and Examples, plus 5 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Error Handler Middleware is an agent skill from jeremylongshore/tons-of-skills-marketplace. 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".

Its SKILL.md is about 580 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Designed for Claude Code

It sits in Backend & APIs, covering Backend development. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • : error handler middleware
  • Error handler middleware Part of the Backend Development skill category
  • Working with error handler middleware functionality
  • With phrases like error handler middleware

Example prompts

  • “error handler middleware”
  • “error middleware”
  • “/error-handler-middleware”

Requirements

  • Node.js
  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(cmd:*), Grep

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  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

What it can do on your machine

Read from SKILL.md and the folder at commit 80f86df. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Bash(cmd:*)
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Error Handler Middleware loads about 584 tokens when it runs. Until then it costs about 93 tokens; SKILL.md has 196 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~93
When it runs · the whole SKILL.md, loaded when a task matches
~584

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit 80f86df, republished under its MIT licence (© jeremylongshore). 196 words, ~584 tokens.

Download SKILL.mdSave it as .claude/skills/error-handler-middleware/SKILL.md (or your agent's skills folder).
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
compatibility
Designed for Claude Code
version
1.0.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
backend, development

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

ErrorCauseSolution
Configuration invalidMissing required fieldsCheck documentation for required parameters
Tool not foundDependency not installedInstall required tools per prerequisites
Permission deniedInsufficient accessVerify credentials and permissions

Resources

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

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

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/06-backend-dev/error-handler-middleware of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit 80f86df

Compare with similar skills

Error Handler Middleware next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Error Handler Middleware compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Error Handler Middleware this skilljeremylongshore/tons-of-skills-marketplace2.8k—~584Automated safety check: PassMIT
Configuring Horizoncoollabsio/coolify63k4 repos~898Automated safety check: PassMIT
Fortify Developmentcoollabsio/coolify63k4 repos~1.9kAutomated safety check: PassMIT
Node Backend Development Guidelinesdiet103/claude-code-infrastructure-showcase10k2 repos~2kAutomated safety check: PassMIT
Laravel Best Practicesanonaddy/anonaddy4.9k13 repos~1.2kAutomated safety check: PassMIT
Laravel Actionscoollabsio/coolify63k—~2.4kAutomated safety check: PassApache-2.0

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Categories

Questions about Error Handler Middleware

What does Error Handler Middleware do?

Manage error handler middleware operations. An agent skill from jeremylongshore/tons-of-skills-marketplace. Error Handler Middleware is an agent skill from jeremylongshore/tons-of-skills-marketplace. Manage error handler middleware operations.

When should I use Error Handler Middleware?

Error Handler Middleware fits situations like: : error handler middleware; error handler middleware Part of the Backend Development skill category; working with error handler middleware functionality; with phrases like error handler middleware.

How do I install Error Handler Middleware in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill error-handler-middleware -a claude-code`. Or copy the skill folder (skills/06-backend-dev/error-handler-middleware in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/error-handler-middleware in your project. Claude Code loads it when a task matches its description.

How do I install Error Handler Middleware in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill error-handler-middleware -a codex`. Or copy the skill folder (skills/06-backend-dev/error-handler-middleware in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/error-handler-middleware in your project. Codex loads it when a task matches its description.

Can I use Error Handler Middleware in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill error-handler-middleware -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/error-handler-middleware, .gemini/skills/error-handler-middleware, .github/skills/error-handler-middleware and .opencode/skills/error-handler-middleware in your project.

What does Error Handler Middleware need to run?

SKILL.md names no scripts, command-line tools or credentials: Error Handler Middleware is instructions for the agent only. Our summary lists: Node.js. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(cmd:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Error Handler Middleware access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Error Handler Middleware safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Error Handler Middleware use?

Error Handler Middleware is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Error Handler Middleware use?

About 584 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Error Handler Middleware?

Skills that share tags, products or a category with Error Handler Middleware: Configuring Horizon (coollabsio/coolify, 63k stars), Fortify Development (coollabsio/coolify, 63k stars), Node Backend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars) and Laravel Best Practices (anonaddy/anonaddy, 4.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Error Handler Middleware?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,825 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 9, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.