This skill should be used when writing test cases, fixing bugs, analyzing code for potential issues, or improving test coverage for JavaScript/TypeScript applications. Use this for unit tests, integration tests, end-to-end tests, debugging runtime errors, logic bugs, performance issues, security vulnerabilities, and systematic code analysis.
Test execution patterns, failure classification, and result analysis
Guidance for effective browser automation with dev-browser plugin. Use for testing local development, verifying UI changes, debugging visual issues, and automating browser tasks.
Provides Go programming expertise, including language syntax, idiomatic patterns, concurrency, and standard library usage. Use when generating, analyzing, refactoring, or reviewing Go code.
Find similar vulnerabilities and bugs across codebases using pattern-based analysis. Use when hunting bug variants, building CodeQL/Semgrep queries, analyzing security vulnerabilities, or performing systematic code audits after finding an initial issue.
Capture bug context, generate reports, and optionally create GitHub issues or share patterns
Fast codebase search via WarpGrep (20x faster than grep)
Fast code search using ripgrep (rg) with smart defaults, regex patterns, and file filtering. Use when searching for text patterns, code snippets, or performing multi-file code analysis.
Searches and explores Burp Suite project files (.burp) from the command line. Use when searching response headers or bodies with regex patterns, extracting security audit findings, dumping proxy history or site map data, or analyzing HTTP traffic captured in a Burp project.
You are a meticulous and performance-obsessed Performance Benchmarker. You are an expert at designing and executing rigorous performance tests to measure the speed, scalability, and resource consumption of software. You are proficient with load testing tools (like k6, JMeter, or Locust) and profiling tools.
TypeScript and JavaScript expert with deep knowledge of type-level programming, performance optimization, monorepo management, migration strategies, and modern tooling. Use PROACTIVELY for any TypeScript/JavaScript issues including complex type gymnastics, build performance, debugging, and architectural decisions. If a specialized expert is a better fit, I will recommend switching and stop.
Code coverage for Rust using LLVM instrumentation with support for multiple output formats and CI integration. Use when measuring test coverage, generating coverage reports, enforcing coverage thresholds, or integrating with codecov/coveralls. Trigger terms: coverage, llvm-cov, code coverage, test coverage, coverage report, codecov, coveralls, branch coverage.
Analyze system performance using throttle statistics, query logs, and resource metrics to identify bottlenecks and optimization opportunities
Get download statistics for an npm package over time. Use when the user asks for package download counts, popularity metrics, or usage statistics.
Analyze code structure, patterns, and complexity without making modifications. Use when reviewing code, planning refactoring, or conducting read-only code analysis.
Semantic code chunking and search patterns for codebase exploration
Use when researching features in jellyfin-web (the Jellyfin server's web UI rendered in CEF) or jellyfin-desktop (old Qt app) for reference during implementation
Analyzes HTML files for SEO issues using static analysis with cheerio. Checks meta tags, Open Graph, Twitter Cards, heading structure, and JSON-LD structured data. Use when user mentions "SEO check", "meta tags", "og tags", "structured data validation", "SEO audit", or wants to analyze HTML/JSX for SEO compliance.
4-phase debugging process (Observe, Hypothesize, Test, Fix) for complex issues. Use when debugging fails, investigating flaky tests, tracking root causes, or facing mysterious bugs.
Use when you see memory warnings, 'retain cycle', app crashes from memory pressure, or when asking 'why is my app using so much memory', 'how do I find memory leaks', 'my deinit is never called', 'Instruments shows memory growth', 'app crashes after 10 minutes' - systematic memory leak detection and fixes for iOS/macOS
