error-handler-middleware

Error Handler Middleware - Auto-activating skill for Backend Development. Triggers on: error handler middleware, error handler middleware Part of the Backend Development skill category.

1.03x

Quality

Does it follow best practices?

Impact

99%

1.03x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./planned-skills/generated/06-backend-dev/error-handler-middleware/SKILL.md

Evaluation results

100%

Harden the ShopFast API Error Responses

Production-ready Express error middleware

Criteria

Without context

With context

4xx vs 5xx distinction

100%

No stack traces to client

100%

Structured error response

100%

Async error forwarding

100%

Registered last

100%

Four-argument signature

100%

Logging included

100%

Custom error class or type check

100%

Default 500 fallback

100%

No sensitive data leaked

100%

Output files present

100%

Without context: $0.6047 · 2m 21s · 28 turns · 29 in / 7,794 out tokens

With context: $0.6809 · 2m 54s · 33 turns · 33 in / 9,766 out tokens

98%

Standardize Error Responses Across the MediTrack FastAPI Service

Standardized FastAPI error responses

Criteria

Without context

With context

Consistent error shape

100%

HTTPException handling

100%

Validation error override

100%

Generic exception handler

100%

Correct HTTP status codes

100%

Logging included

75%

No tracebacks to client

100%

Custom exception class

100%

Handlers registered on app

100%

Output files present

100%

No sensitive data leaked

100%

Without context: $0.6186 · 2m 12s · 32 turns · 2,830 in / 8,260 out tokens

With context: $0.6467 · 2m 8s · 36 turns · 67 in / 8,256 out tokens

100%

Add Centralized Error Handling to the FleetTrack Go Service

Go microservice error middleware

Criteria

Without context

With context

Middleware pattern

100%

JSON error response

100%

Content-Type header

100%

Differentiated status codes

100%

Error wrapping

80%

100%

Structured logging

100%

No internal details to client

100%

Panic recovery

100%

Custom error type

100%

Output files present

100%

Default 500 fallback

100%

Without context: $0.4669 · 2m 48s · 24 turns · 2,822 in / 7,274 out tokens

With context: $0.5561 · 2m 53s · 28 turns · 27 in / 8,240 out tokens

Repository: jeremylongshore/claude-code-plugins-plus-skills
Commit: 994edc4

Evaluated: 18 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Harden the ShopFast API Error Responses Standardize Error Responses Across the MediTrack FastAPI Service Add Centralized Error Handling to the FleetTrack Go Service

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.