io.github.blader/Claudeception/typescript-circular-dependency

Detect and resolve TypeScript/JavaScript circular import dependencies. Use when: (1) "Cannot access 'X' before initialization" at runtime, (2) Import returns undefined unexpectedly, (3) "ReferenceError: Cannot access X before initialization", (4) Type errors that disappear when you change import order, (5) Jest/Vitest tests fail with undefined imports that work in browser.

io.github.openai/plugins/frontend-testing-debugging

Use when testing, debugging, or making targeted improvements to rendered frontend apps through the Build Web Apps or web dev plugin: local dev servers, UI regressions, interaction bugs, console errors, responsive layout, and visual QA. Check whether the Browser plugin is available and use it first when it is; otherwise use regular Playwright with the recorded reason.

io.github.NeverSight/learn-skills.dev/mobile-testing

Use this skill when writing or configuring mobile app tests with Detox or Appium, setting up device farms (AWS Device Farm, Firebase Test Lab, BrowserStack), integrating crash reporting (Crashlytics, Sentry, Bugsnag), or distributing beta builds (TestFlight, Firebase App Distribution, App Center). Triggers on mobile e2e testing, native app automation, device matrix testing, crash symbolication, and OTA beta distribution workflows.

io.github.wsimmonds/claude-nextjs-skills/nextjs-anti-patterns

Identify and fix common Next.js App Router anti-patterns and mistakes. Use when reviewing code for Next.js best practices, debugging performance issues, migrating from Pages Router patterns, or preventing common pitfalls. Activates for code review, performance optimization, or detecting inappropriate useEffect/useState usage. CRITICAL: For browser detection, keep the logic in the user-facing component (or a composed helper that it renders) rather than isolating it in unused files.

io.github.omer-metin/skills-for-antigravity/cursor-ai

Expert in Cursor AI IDE - the leading AI-powered code editor. Covers Rules files for project-specific AI behavior, Plan Mode for structured development, Background Agents for parallel work, and advanced features like voice mode and browser integration. Essential for developers maximizing AI-assisted coding productivity. Use when "cursor ai, cursor rules, .cursorrules, cursor composer, cursor agent, plan mode, background agent, cursor tips, cursor, ide, ai-coding, editor, productivity, agent, developer-tools" mentioned.

io.github.CopilotKit/CopilotKit/react-core

@copilotkit/react-core — mount CopilotKitProvider in a Next.js App Router / React Router v7 / TanStack Start / SPA app, drop in CopilotChat/CopilotPopup/CopilotSidebar (v2 chat components ship from react-core/v2 — NOT react-ui, which is CSS-only in v2), access and subscribe to agents with useAgent / useAgentContext / useCapabilities, switch between multiple agents, manage durable Intelligence threads with useThreads, register browser-side tools via useFrontendTool, render tool calls with useRenderTool / useComponent / useDefaultRenderTool, gate execution with useHumanInTheLoop, wire file attachments with useAttachments, configure suggestion pills, and register activity- and custom-message renderers. publicLicenseKey is canonical (publicApiKey is deprecated alias). Load the reference under references/ that matches your task.

io.github.actualbudget/actual/review-actual-pr

Comprehensive review of a pull request in the actualbudget/actual repo. Performs an offline code review against the repo's CODE_REVIEW_GUIDELINES.md and AGENTS.md (no GitHub comments are ever posted), then browser-tests the change with playwright-cli. For bug PRs, reproduces the issue on edge.actualbudget.org first and verifies the fix on the Netlify preview; for feature/enhancement PRs, exercises the change on the preview and captures annotated screenshots highlighting the new functionality. Use whenever the user asks to review, test, validate, vet, sanity-check, QA, or otherwise look at a PR / pull request in the Actual Budget repo — including phrases like "review

io.github.camunda/camunda/frontend-migrator

Use when migrating, porting, rewriting, or moving frontend code from operate/client/ or tasklist/client/ to the orchestration cluster webapp at webapp/client/apps/orchestration-cluster-webapp/. Trigger whenever someone mentions migrating a legacy page, component, or module to the new unified frontend, converting React Router to TanStack Router, replacing MobX stores with TanStack Query or URL state, rewriting styled-components as SCSS modules, or converting legacy test patterns to Vitest browser mode. Also use when someone asks how a legacy pattern maps to the new architecture, even for small questions like "how would I write this Operate component in the new app?" or "what's the equivalent of this Tasklist store in the unified frontend?"