Testing
Unit tests, integration tests, test automation
test
by facebook
Use when you need to run tests for React core. Supports source, www, stable, and experimental channels.
feature-flags
by facebook
Use when feature flag tests fail, flags need updating, understanding @gate pragmas, debugging channel-specific test failures, or adding new flags to React.
studio-testing
by supabase
Testing strategy for Supabase Studio. Use when writing tests, deciding
frontend-testing
by langgenius
Use when writing or changing Vitest or React Testing Library tests under web/ or packages/dify-ui/, or when the user explicitly requests frontend test strategy, including evaluation of an existing strategy. Do not use for frontend code-review-only requests, general testability discussion, Python tests, or Cucumber/Playwright E2E.
webapp-testing
by anthropics
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
e2e-test-create
by metabase
Analyze React component source code to understand UI structure, then generate idiomatic Cypress E2E tests following Metabase conventions. Falls back to Playwright MCP browser exploration only when code reading and screenshot debugging are insufficient.
e2e-test
by metabase
Run Cypress E2E tests, analyze failures including screenshots, and stress test for flakiness
playwright-mcp-metabase
by metabase
Drive Metabase's UI with the Playwright MCP browser tools (mcp__playwright__browser_*). Covers the snapshot/act/check pattern, Mantine component pitfalls (Menu race, Select/MultiSelect, the Escape-closes-modal trap, portal scoping), and Metabase-specific login flows. Use whenever a session needs to interact with the Metabase UI through Playwright MCP.
e2e-test-review
by metabase
Review Cypress E2E spec files for Metabase conventions, common gotchas, and flakiness/performance issues. Use when reviewing pull requests or diffs containing Cypress spec files in e2e/test/scenarios/.
testing
by lobehub
'Vitest testing guide. Use when writing or updating tests, fixing failing tests, improving coverage, debugging test issues, or setting up mocks.'
ha-quality-scale-verify
by home-assistant
Verifies that a Home Assistant integration follows a specific quality scale rule, checking whether it implements the required patterns, configurations, or code structures defined by the quality scale system. Use when asked to check a rule (e.g. "check if the peblar integration follows the config-flow rule") or to verify an integration reaches a quality tier (Bronze, Silver, Gold, Platinum).
open-pr
by Significant-Gravitas
Open a pull request with proper PR template, test coverage, and review workflow. Guides agents through creating a PR that follows repo conventions, ensures existing behaviors aren't broken, covers new behaviors with tests, and handles review via bot when local testing isn't possible. TRIGGER when user asks to "open a PR", "create a PR", "make a PR", "submit a PR", "open pull request", "push and create PR", or any variation of opening/submitting a pull request.
write-frontend-tests
by Significant-Gravitas
"Analyze the current branch diff against dev, plan integration tests for changed frontend pages/components, and write them. TRIGGER when user asks to write frontend tests, add test coverage, or 'write tests for my changes'."
capture-api-response-test-fixture
by vercel
Capture API response test fixture.
develop-ai-functions-example
by vercel
Develop examples for AI SDK functions. Use when creating, running, or modifying examples under examples/ai-functions/src to validate provider support, demonstrate features, or create test fixtures.
nx-workspace
by nrwl
"Explore and understand Nx workspaces. USE WHEN answering questions about the workspace, projects, or tasks. ALSO USE WHEN an nx command fails or you need to check available targets/configuration before running a task. EXAMPLES: 'What projects are in this workspace?', 'How is project X configured?', 'What depends on library Y?', 'What targets can I run?', 'Cannot find configuration for task', 'debug nx task failure'."
e2e-studio-tests
by supabase
Run e2e tests in the Studio app. Use when asked to run e2e tests, run studio tests, playwright tests, or test the feature.
vitest
by supabase
Vitest API and config reference (Jest-compatible) — mocking with vi.*, spies, fake timers, coverage configuration, fixtures, snapshots, and test filtering. Use for Vitest API and configuration questions anywhere in the monorepo; for Studio-specific test strategy and component-test setup, start with studio-testing and studio-mock-api-tests.
nx-import
by nrwl
Import, merge, or combine repositories into an Nx workspace using nx import. USE WHEN the user asks to adopt Nx across repos, move projects into a monorepo, or bring code/history from another repository.
dist-build-migration
by nrwl
Migrate an Nx package to build to a local dist/ directory with nodenext module resolution, exports map, and @nx/nx-source condition.
react-testing
by getsentry
Write and review React/TypeScript tests for Sentry's frontend using Jest and React Testing Library. Use when adding or editing tests in static/ (*.spec.tsx), writing component/hook tests, mocking API responses with MockApiClient, testing routing or network requests, or when asked to "write a frontend test", "add a React test", "test this component", or "fix a flaky RTL test".
web-perf
by cloudflare
Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed.
durable-objects
by cloudflare
Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.
testing
by cloudflare
Use when writing or running tests for this project. Covers unit vs E2E test decisions, test file locations, mock patterns, and project-specific testing conventions. (project)