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Found 2,257 Skills
Code review with security, performance, and monetization lenses for Roblox projects
Comprehensive mobile app testing strategies for iOS and Android. Covers unit tests, UI tests, integration tests, performance testing, and test automation with Detox, Appium, and XCTest.
TanStack Query v5 performance optimization for data fetching, caching, mutations, and query patterns. This skill should be used when using useQuery, useMutation, queryClient, prefetch patterns, or TanStack Query caching. This skill does NOT cover generating query hooks from OpenAPI (use orval skill) or mocking API responses in tests (use test-msw skill).
Reviews watchOS code for app lifecycle, complications (ClockKit/WidgetKit), WatchConnectivity, and performance constraints. Use when reviewing code with import WatchKit, WKExtension, WKApplicationDelegate, WCSession, or watchOS-specific patterns.
Systematic improvement of existing agents through performance analysis, prompt engineering, and continuous iteration.
Build software with elite design principles focusing on user outcomes, trust, accessibility, and performance. Use when creating UI components, designing user flows, writing production code, reviewing code quality, or when the user mentions UX, accessibility, performance, or trust-focused development.
Mobile-first UX best practices enforcer for web applications. Covers touch targets, responsive design, mobile gestures, performance optimization, and accessibility. Use when creating or editing mobile UI components, implementing responsive layouts, handling touch interactions, optimizing for mobile devices, or working with viewport configurations, breakpoints, and mobile-specific patterns.
Optimizes Snowflake SQL query performance from provided query text. Use when optimizing Snowflake SQL for: (1) User provides or pastes a SQL query and asks to optimize, tune, or improve it (2) Task mentions "slow query", "make faster", "improve performance", "optimize SQL", or "query tuning" (3) Reviewing SQL for performance anti-patterns (function on filter column, implicit joins, etc.) (4) User asks why a query is slow or how to speed it up
Prepare and lead difficult conversations as a manager/leader and produce a Difficult Conversation Pack (conversation brief, talk track/script, objection+emotion handling plan, follow-up note, and quality gates). Use for difficult conversation, hard conversation, tough feedback, performance conversation, promotion denial, layoff conversation, termination conversation, firing. Category: Leadership.
Use when planning channel distribution and measuring video performance.
Setup Sentry Metrics in any project. Use when asked to add custom metrics, track counters/gauges/distributions, or instrument application performance. Supports JavaScript and Python.
Git 2.49+ features including git-backfill, path-walk API, and performance improvements