Claude Skills by majiayu000

Master advanced C# patterns including records, pattern matching, async/await, LINQ, and performance optimization for .NET 10. Use when: (1) implementing complex C# patterns, (2) optimizing performance, (3) refactoring legacy code, (4) writing modern idiomatic C#.

Modern C# asynchronous programming patterns using async/await, proper CancellationToken usage, and error handling in async code. Use when guidance needed on async/await best practices, Task composition and coordination, ConfigureAwait usage, ValueTask optimization, or async operation cancellation patterns. Pure .NET framework patterns applicable to any C# application.

C# code style and naming conventions based on POCU standards. Covers naming rules (mPascalCase for private, bBoolean prefix, EEnum prefix), code organization, C# 9.0 patterns. Use PROACTIVELY for C# code reviews, refactoring, or establishing project standards.

Decompile .NET assemblies to inspect types, understand implementations, debug third-party libraries, and view IL code. Use when debugging NuGet dependency behavior, understanding compiled code, investigating runtime issues, or exploring unfamiliar assemblies.

.NET 8 and C# 12 specialist with expertise in ASP.NET Core, EF Core, and modern enterprise development. Use when building C# applications, working with .NET, implementing ASP.NET Core APIs, or using Entity Framework.

Use when building C# applications with .NET 8+, ASP.NET Core APIs, or Blazor web apps. Invoke for Entity Framework Core, minimal APIs, async patterns, CQRS with MediatR.

Expert .NET 10 Debugging Strategist using CLI-first diagnosis. Use when user encounters: - Bugs, errors, exceptions in .NET/C# applications - Performance issues (slow, high CPU, memory leaks) - Crashes, deadlocks, race conditions - Need root cause analysis Triggers: "debug", "error", "exception", "crash", "memory leak", "high CPU", "performance", "dotnet-dump", "dotnet-counters", "stack trace", "NullReferenceException", "deadlock", "race condition", "OutOfMemoryException", "slow", "timeout"

Principal .NET 10 Architect providing high-performance, idiomatic C# 14 solutions. Use when user asks about: - .NET design patterns (Singleton, Factory, CQRS, Repository, Options Pattern) - C# coding style and best practices - Architecture decisions (Minimal APIs, Modular Monoliths) - Modern C# implementations with primary constructors, records, field keyword Triggers: ".NET", "C#", "design pattern", "architecture", "Minimal API", "primary constructor", "record type", "Options Pattern", "Si...

Expert-level C# development with .NET 8+, ASP.NET Core, LINQ, async/await, and enterprise patterns

Use when lINQ query and method syntax, deferred execution, and performance optimization. Use when querying collections in C#.

Use when C# nullable reference types and value types for null safety, nullable annotations, and patterns for handling null values.

ALWAYS use for ANY C# operation: renaming (files/classes/methods/properties/namespaces), finding references/usages ("where is X used"), finding definitions ("where is X defined"), understanding code structure (hierarchies/dependencies/relationships). Roslyn-powered semantic analysis ensures all references are updated correctly across the entire solution.

Expert-level C# unit testing skill based on ISTQB standards and best practices. Use this skill when creating, reviewing, or refactoring unit tests for C# applications (.NET/ASP.NET Core). Applies test design techniques, coverage strategies, and quality assurance principles from ISTQB Foundation and Advanced levels.

C# and Unity development standards for Mark's projects.

Comprehensive C# code validation, static analysis, and best practices verification for .NET applications. Use when validating C# code, checking SOLID principles, reviewing async/await patterns, verifying nullable reference types usage, checking Entity Framework queries, ensuring security best practices, or reviewing .NET code quality and architecture.

C# and .NET project workflow guidelines. Activate when working with C# files (.cs), .csproj, .NET projects, or C#-specific tooling.

C# XML documentation with on-demand Haiku→Expert Review→Final workflow. Flexible Korean/English language support. Use when documenting C# APIs, properties, methods, classes, and interfaces.

C# static analysis tool for call graphs, unused code detection, impact analysis, HTML documentation generation, and Graphviz diagram export

This skill should be used when the user requests to generate, create, or configure Content Security Policy (CSP) headers for Next.js applications to prevent XSS attacks and control resource loading. It analyzes the application to determine appropriate CSP directives and generates configuration via next.config or middleware. Trigger terms include CSP, Content Security Policy, security headers, XSS protection, generate CSP, configure CSP, strict CSP, nonce-based CSP, CSP directives.

Generate Content Security Policy (CSP) header configurations for web security. Triggers on "create csp header", "generate content security policy", "csp config", "security headers".

CSP (Custom Shaders Patch) Lua API reference for Assetto Corsa modding. Use when working with ac.*, ui.*, render.*, physics.* APIs or any CSP Lua code.

Debug CSRF token issues and authentication problems including 403 Forbidden errors, cookie issues, JWT tokens, OAuth flows, and session management. Use when troubleshooting CSRF verification failed, 403 errors on POST requests, login not working, or token refresh issues.

Validate csrf protection validator operations. Auto-activating skill for Security Fundamentals. Triggers on: csrf protection validator, csrf protection validator Part of the Security Fundamentals skill category. Use when working with csrf protection validator functionality. Trigger with phrases like "csrf protection validator", "csrf validator", "csrf".

Implement Cross-Site Request Forgery (CSRF) protection using tokens, SameSite cookies, and origin validation. Use when building forms and state-changing operations.

--- name: Cross-Site Request Forgery (CSRF) Testing description: This skill should be used when the user asks to "test for CSRF vulnerabilities," "create CSRF proof of concept exploits," "bypass anti-CSRF token protections," "validate CSRF mitigation controls," or "exploit cross-site request forgery in web applications." It provides comprehensive guidance for detecting, exploiting, and remediating CSRF vulnerabilities. version: 1.0.0 tags: [csrf, web-security, penetration-testing, session-sec...

Creates native CSS animations using keyframes, transitions, and modern animation properties. Use when building animations without JavaScript libraries, optimizing performance, or implementing micro-interactions.

Organize CSS using BEM, SMACSS, and CSS-in-JS patterns. Use when building scalable, maintainable styling systems with proper naming conventions.

Modern CSS organization with native @import, @layer cascade control, CSS nesting, design tokens, and element-focused selectors. AUTO-INVOKED when editing .css files.

CSS authoring guidance emphasizing web standards, accessibility, and performance. Use when writing, reviewing, or refactoring CSS. Provides patterns, snippets, and conventions that prioritize native CSS over frameworks, semantic structure, and maintainable code. Refer to references/patterns.md for specific patterns and snippets.

Systematically find and replace ALL hardcoded hex values with proper CSS design tokens to ensure complete color consistency across the Pomo-Flow application. This skill addresses the critical issue of yellow vs orange medium priority colors by enforcing a unified design token system based on industry best practices from Atlassian, Salesforce, and enterprise design systems.

CSS design tokens and color system for vehicle insurance platform. Use when defining colors, spacing, typography, or design variables. Keywords: eye-care colors #5B8DEF/#8B95A5/#C5CAD3, CSS variables, spacing system, color palette, typography scale, design tokens, variables.css, theme colors.

This skill should be used when working with CSS, creating components, styling elements, refactoring styles, or reviewing CSS code. Triggers on "CSS", "styles", "Tailwind", "dark mode", "component styling", "semantic class", "@apply", "stylesheet". Routes to specialized sub-skills for creation, validation, or refactoring.

Analyze CSS coverage, identify unused rules, and detect stylesheet conflicts. Use after visual QA to optimize stylesheets before publication.

Expert in modern CSS (cascade layers, OKLCH, container queries, defensive patterns). Use for CSS implementation, styling, layout, colors, typography, responsive design, and UI components.

Master Flexbox and CSS Grid layouts for modern responsive design

CSS fundamentals - selectors, specificity, box model, positioning, units

Generate CSS, Tailwind, and styled-components code from design style selections

Comprehensive CSS generation, editing, and enhancement tool. Use this skill when users need to create CSS from scratch, modify existing CSS, enhance CSS with modern features, optimize CSS performance, or generate CSS frameworks and components. This skill handles CSS generation, editing, enhancement, validation, and optimization tasks.

Deep CSS analysis tool for understanding specificity, cascade order, inheritance chains, and computed styles. Visualizes CSS complexity and suggests simplifications. Use when debugging specificity issues or understanding CSS behavior.

This skill provides prescriptive guidance for writing modern CSS layouts using intrinsic design principles, container queries, and fluid responsive techniques. When implementing CSS layouts, always consult this document first.

Explain CSS layout issues and propose fixes. Use when a junior developer is struggling with alignment or spacing.

Use modern CSS features - custom properties, container queries, :has(), @layer, CSS nesting

Implements scoped CSS using CSS Modules with automatic class name generation, composition, and TypeScript support. Use when needing component-scoped styles, avoiding naming collisions, or migrating from global CSS.

Use when implementing Disney's 12 animation principles with pure CSS animations and transitions

Optimize CSS performance - critical CSS, code splitting, purging, bundle analysis

Guide for reviewing modern CSS framework. Use this when asked to review CSS in `packages/css`.

Use Sass/SCSS for advanced CSS preprocessing with modern @use/@forward syntax

CSS coding standards for Oh My Brand! theme. BEM methodology, custom properties, theme.json integration, responsive design, and accessibility. Use when styling blocks, templates or components.

Aggregate and merge data from multiple sources including App Store sales, GitHub commits, Skillz events, and more. Use when combining data for reports, dashboards, or analysis.

Master machine learning, data engineering, AI engineering, MLOps, and prompt engineering. Build intelligent systems from data pipelines to production AI applications with LLMs, agents, and modern frameworks.