Claude Skills by NickCrew

OWASP Top 10 security vulnerabilities with detection and remediation patterns. Use when conducting security audits, implementing secure coding practices, or reviewing code for common security vulnerabilities.

Python performance optimization patterns using profiling, algorithmic improvements, and acceleration techniques. Use when optimizing slow Python code, reducing memory usage, or improving application throughput and latency.

Python testing patterns and best practices using pytest, mocking, and property-based testing. Use when writing unit tests, integration tests, or implementing test-driven development in Python projects.

Meta-skill for auditing and validating skill quality. Use when reviewing skills for consistency, completeness, accuracy, and adherence to standards. Provides structured rubrics, scoring frameworks, and actionable recommendations.

React performance optimization patterns using memoization, code splitting, and efficient rendering strategies. Use when optimizing slow React applications, reducing bundle size, or improving user experience with large datasets.

Use when preparing a production release or release candidate - provides a checklist-driven workflow for validation, versioning, build optimization, documentation updates, and deployment readiness.

Use when a repository needs cleanup of dead code, build artifacts, unused dependencies, outdated docs, or stale tests - provides safe cleanup workflows, validation steps, and reporting templates for code, deps, docs, tests, and sprint archives.

Use when completing tasks, implementing major features, or before merging to verify work meets requirements - dispatches superpowers:code-reviewer subagent to review implementation against plan or requirements before proceeding

Use when errors occur deep in execution and you need to trace back to find the original trigger - systematically traces bugs backward through call stack, adding instrumentation when needed, to identify source of invalid data or incorrect behavior

Secure coding practices and defensive programming patterns for building security-first applications. Use when implementing authentication, handling user input, managing sensitive data, or conducting secure code reviews.

Security testing patterns including SAST, DAST, penetration testing, and vulnerability assessment techniques. Use when implementing security testing pipelines, conducting security audits, or validating application security controls.

Use when you've developed a broadly useful skill and want to contribute it upstream via pull request - guides process of branching, committing, pushing, and creating PR to contribute skills back to upstream repository

Guide for creating effective skills. Use when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.

Maximum visual excellence for any UI platform. Use when building user interfaces, styling components, or polishing visual elements.

Use when designing system architecture, APIs, components, or data models - provides a structured design workflow with validation and documentation outputs.

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes - four-phase framework (root cause investigation, pattern analysis, hypothesis testing, implementation) that ensures understanding before attempting solutions

Use when coordinating complex tasks with orchestration, delegation, or parallel workstreams - provides structured workflows for orchestrate:brainstorm, orchestrate:spawn, and orchestrate:task.

Brief description of what this skill does (1-2 sentences). Use when [specific trigger condition]. Keep under 200 words total.

A template for creating new skills. Use when initializing a new skill to ensure proper structure and metadata.

Terraform infrastructure-as-code best practices for scalable and maintainable cloud infrastructure. Use when writing Terraform modules, managing infrastructure state, or implementing infrastructure automation at scale.

Use when implementing any feature or bugfix, before writing implementation code - write the test first, watch it fail, write minimal code to pass; ensures tests actually verify behavior by requiring failure first

Use when generating tests for new or existing code to improve coverage - provides a structured workflow for analyzing code, creating tests, and validating coverage goals.

Use when writing or changing tests, adding mocks, or tempted to add test-only methods to production code - prevents testing mock behavior, production pollution with test-only methods, and mocking without understanding dependencies

Threat modeling methodologies using STRIDE, attack trees, and risk assessment for proactive security analysis. Use when designing secure systems, conducting security reviews, or identifying potential attack vectors in applications.

Compressed communication using symbols and abbreviations. Use when context is limited or brevity is needed.

Advanced TypeScript patterns for type-safe, maintainable code using sophisticated type system features. Use when building type-safe APIs, implementing complex domain models, or leveraging TypeScript's advanced type capabilities.

Generates high-quality, non-generic UI designs with a focus on performance, progressive disclosure, and distinctive aesthetics.

Create comprehensive user journey maps that identify pain points, opportunities, and emotional states across touchpoints. Use when mapping user experiences or analyzing conversion flows.

Multi-perspective UX review combining usability, accessibility, and interaction design analysis.

Use when activating visual showcase modes (supersaiyan, kamehameha, over9000) for UI or interaction design - provides mode-specific enhancement checklists.

Toolkit for interacting with and testing local web applications using Playwright. Use when verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Systematic approach to identifying, fixing, and validating bug fixes. Use when fixing bugs, resolving issues, or addressing errors.

Complete workflow for developing new features from design to deployment. Use when starting a new feature, adding functionality, or building something new.

Complete feature development workflow from design to deployment. Use when implementing new features or functionality.

Systematic performance analysis and optimization. Use when things are slow, need optimization, or preparing for scale.

Comprehensive security assessment and remediation. Use for security reviews, compliance checks, vulnerability assessments.

Use when creating new skills, editing existing skills, or verifying skills work before deployment - applies TDD to process documentation by testing with subagents before writing, iterating until bulletproof against rationalization