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Found 3,726 Skills
Launch the app and hands-on verify that changes work by interacting with it. Use when the user asks to "smoke test", "test it manually", "verify it works", "try it out", "run a smoke test", "check it in the browser", or "does it actually work". Not for unit/integration tests.
Live browser interaction via Playwright MCP — navigate pages, click buttons, fill forms, take screenshots.
Conduct expert heuristic evaluations using Nielsen's heuristics and domain-specific criteria.
Expert marketing analytics covering campaign analysis, attribution modeling, marketing mix modeling, ROI measurement, and performance reporting. Use when analyzing campaign ROI, comparing attribution models, optimizing marketing budget allocation, building executive dashboards, or running A/B test statistical analysis.
Expert knowledge for Modern Java (21+) development, including Virtual Threads, performance tuning, and idiomatic clean code. Use for deep Java language/logic questions.
Conduct a comprehensive accessibility audit against WCAG guidelines with severity ratings and remediation steps.
Identifying and exploiting OAuth 2.0 and OpenID Connect misconfigurations including redirect URI manipulation, token leakage, and authorization code theft during security assessments.
Use when writing or reviewing Go code to ensure idiomatic style, up-to-date language features, and best practices.
Performance regression detection using the browse daemon. Establishes baselines for page load times, Core Web Vitals, and resource sizes. Compares before/after on every PR. Tracks performance trends over time. Use when: "performance", "benchmark", "page speed", "lighthouse", "web vitals", "bundle size", "load time".
Use when reviewing an agent skill, SKILL.md package, or skill-like instruction document for design quality, missing patterns, portability, or agent usability before adoption or revision
Enforces a disciplined Red-Green-Refactor (TDD) workflow in TypeScript/Node.js. Use this whenever creating new features, fixing bugs, or migrating logic to ensure high-quality, verifiable implementations.
Integration patterns for the GitHub Accessibility Scanner Action (github/accessibility-scanner). Teaches agents how to detect scanner presence, parse scanner-created issues, correlate findings with local scans, and track Copilot-assigned fix status.