Standardize Node/Express error handling with AppError classes and middleware.
npx skills add https://github.com/mahg-es/araya --skill error-handling-mahg-es
Please help me install this Agent Skill. Skill: error-handling Source: https://github.com/mahg-es/araya/tree/main/skills/error-handling Command: npx skills add https://github.com/mahg-es/araya --skill error-handling-mahg-es
Inconsistent error handling leads to information leakage (stack traces to users), lost debugging context (no logs), and confusing API responses. This skill establishes a single error-handling pattern used by every endpoint and service.
Implement the AppError hierarchy and error-handler middleware in your project, then expose a health-check endpoint to exercise the pattern.
High-intent search queries and answers about installing and using this skill.
To standardize error handling in Express APIs, implement a hierarchy of AppError types with status codes and use error-handler middleware to catch AppError instances and return structured JSON responses. This prevents information leakage and ensures consistent API responses.
Inconsistent API error handling causes security issues by leaking sensitive information like stack traces to users and losing debugging context. A unified error-handling pattern with proper logging rules and generic 500 responses for unknown errors prevents this exposure.
You can return consistent HTTP status codes by defining a hierarchy of AppError types, such as NotFoundError or ValidationError, each mapped to specific status codes. The error-handler middleware catches these AppError instances and returns the appropriate HTTP status in structured JSON.
The best way to log Express API errors for debugging is to enforce logging rules within dedicated error-handler middleware. This middleware catches AppError types, logs unknown errors with request context, and returns generic 500 responses to clients without leaking stack traces.
Yes, you can use custom error classes with Express middleware by creating a hierarchy of AppError types like NotFoundError and UnauthorizedError. The error-handler middleware catches these custom AppError instances to return structured JSON with proper HTTP status codes and portable error details.
Yes, this error-handling pattern includes a health-check endpoint to exercise the error-handling implementation. This endpoint verifies that your AppError hierarchy, error-handler middleware, and logging rules are functioning correctly across your Node and Express services.
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