nomistakes

What problem does it solve?

This Skill solves the pervasive problem of AI-generated and human-written code containing preventable bugs, security vulnerabilities, performance issues, and anti-patterns that cause production outages, technical debt, and costly debugging sessions. It acts as an always-available coding coach that enforces proven best practices at the point of writing, reducing error rates by catching issues before they enter the codebase.

Core Features & Use Cases

• 16 Core Error Prevention Principles: Covers input validation, error handling, null safety, async operation safety, type safety, boundary checks, resource management, immutability, configuration validation, defensive programming, Core Web Vitals optimization, fire-and-forget bug detection, Next.js Server Actions error handling, OWASP Top 10 2025 security patterns, TypeScript 5.x safety features, and modern validation library selection.
• Production-Ready Code Examples: Includes complete, working implementations for API route handlers, data fetching services, form validation, file upload handlers, background job processors, and database repositories with full error handling and type safety.
• Workflow Integration Tools: Automated Biome migration script, AI code review checklists, adversarial review (VDD) patterns, comprehensive testing strategies for error coverage, and pre-commit checklists to validate code before shipping.
• Use Case Example: When building a new user authentication endpoint, this Skill ensures you add input validation, rate limiting, secure password hashing, proper error responses, and tests for error cases like invalid input and database failures.

Quick Start

Use the nomistakes skill to review your new user registration API code for missing input validation, unhandled async errors, and security gaps before merging the pull request.