Agent skills
Skills for AI agents like Claude Code and Cursor, shared by members. Each one links to its GitHub repository or website.
Testing & QA
Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.
1.2M installsnpx skills add https://github.com/mattpocock/skills --skill tddTesting & QA
Grill the user relentlessly about a plan, decision, or idea. Use when the user wants to stress-test their thinking, or uses any 'grill' trigger phrases.
1.1M installsnpx skills add https://github.com/mattpocock/skills --skill grillingTesting & QA
Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.
907.2K installsnpx skills add https://github.com/mattpocock/skills --skill diagnosing-bugsTesting & QA
Set up Husky pre-commit hooks with lint-staged (Prettier), type checking, and tests in the current repo. Use when user wants to add pre-commit hooks, set up Husky, configure lint-staged, or add commit-time formatting/typechecking/testing.
535.4K installsnpx skills add https://github.com/mattpocock/skills --skill setup-pre-commitTesting & QA
Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.
521.6K installsnpx skills add https://github.com/mattpocock/skills --skill migrate-to-shoehornTesting & QA
Rigor Debug / Rigor Audit skill for deep learning research work. Use when the user pastes a traceback, terminal error, CUDA OOM, checkpoint load failure, shape mismatch, NaN loss symptom, or training failure and wants conservative diagnosis before any patching, with debug fixes…
352.5K installsnpx skills add https://github.com/lllllllama/rigorpilot-skills --skill safe-debugTesting & QA
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes
325.4K installsnpx skills add https://github.com/obra/superpowers --skill systematic-debuggingTesting & QA
Use when implementing any feature or bugfix, before writing implementation code
274K installsnpx skills add https://github.com/obra/superpowers --skill test-driven-developmentTesting & QA
A discipline for hard bugs. Skip phases only when explicitly justified.
227.6K installsnpx skills add https://github.com/mattpocock/skills --skill diagnoseTesting & QA
Use when implementation is complete, all tests pass, and you need to decide how to integrate the work
226.9K installsnpx skills add https://github.com/obra/superpowers --skill finishing-a-development-branchTesting & QA
Automate browser interactions, test web pages and work with Playwright tests.
211.3K installsnpx skills add https://github.com/microsoft/playwright-cli --skill playwright-cliTesting & QA
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.
200.9K installsnpx skills add https://github.com/anthropics/skills --skill webapp-testingTesting & QA
Run an interactive QA session. The user describes problems they're encountering. You clarify, explore the codebase for context, and file GitHub issues that are durable, user-focused, and use the project's domain language.
198.7K installsnpx skills add https://github.com/mattpocock/skills --skill qaTesting & QA
Build, debug, or review Cloudflare Durable Objects code for persistent state and coordination.
122.6K installsnpx skills add https://github.com/cloudflare/skills --skill durable-objectsTesting & QA
Fix bugs and small behavior changes at the narrowest responsible layer. Use when regression proof, preserved surrounding behavior, and task-relevant tests matter.
118.5K installsnpx skills add https://github.com/juliusbrussee/caveman --skill surgical-patchTesting & QA
Check whether a Playwright, Puppeteer, Selenium or CDP-driven browser presents a coherent fingerprint, using liarjs as a library against a Page you already have - navigator.webdriver, HeadlessChrome tokens, worker versus main-thread identity, patched-API integrity, WebGL versus…
117.9K installsnpx skills add https://github.com/liarjsdev/liarjs-skills --skill playwright-stealth-verifyTesting & QA
Use when user asks to "build a Solana dapp", "write an Anchor program", "create a token", "debug Solana errors", "set up wallet connection", "test my Solana program", "fuzz my Solana program", "deploy to devnet", "send a v1 transaction", "support larger transactions", "fix…
108.5K installsnpx skills add https://github.com/solana-foundation/solana-dev-skill --skill solana-devTesting & QA
Use when writing Playwright tests, fixing flaky tests, debugging failures, implementing Page Object Model, configuring CI/CD, optimizing performance, mocking APIs, handling authentication or OAuth, testing accessibility (axe-core), file uploads/downloads, date/time mocking,…
104K installsnpx skills add https://github.com/currents-dev/playwright-best-practices-skill --skill playwright-best-practicesTesting & QA
Guides Stripe integration decisions across development and test environment planning (separate sandboxes vs the shared test mode sandbox), API selection (Checkout Sessions vs PaymentIntents), Connect platform setup (Accounts v2, controller properties), billing/subscriptions,…
101.4K installsnpx skills add https://github.com/stripe/ai --skill stripe-best-practicesTesting & QA
Security guidance and vulnerability review for codebases, APIs, services, CLI tools, libraries, and daemons. Use for security questions, focused reviews, vulnerability research, security audits, or pen tests. Run the complete workflow only for explicit codebase audit or…
92.7K installsnpx skills add https://github.com/cloudflare/security-audit-skill --skill security-auditTesting & QA
When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program. Also use when the user mentions "A/B test," "split test," "experiment," "test this change," "variant copy," "multivariate test," "hypothesis," "should I test…
84.7K installsnpx skills add https://github.com/coreyhaines31/marketingskills --skill ab-testingTesting & QA
Build and distribute Expo development clients locally or via TestFlight for internal testing. For production TestFlight releases and store submission, use the…
74.3K installsnpx skills add https://github.com/expo/skills --skill expo-dev-clientTesting & QA
Guides systematic root-cause debugging. Use when tests fail, builds break, something that worked yesterday broke, behavior doesn't match expectations, or you encounter any unexpected error. Use when you need to figure out what broke and why — a systematic approach to finding…
71.8K installsnpx skills add https://github.com/addyosmani/agent-skills --skill debugging-and-error-recoveryTesting & QA
Drives development with tests using the red-green-refactor loop. Use when implementing any logic, fixing any bug, or changing any behavior. Use when you need to prove that code works, when a bug report arrives, or when you're about to modify existing functionality. Use when…
70.8K installsnpx skills add https://github.com/addyosmani/agent-skills --skill test-driven-developmentTesting & QA
Create, run, and maintain Momentic browser E2E tests and modules stored as *.test.yaml and *.module.yaml files.
68.5K installsnpx skills add https://github.com/momentic-ai/skills --skill momentic-testTesting & QA
Classify or explain Momentic test run results using Momentic MCP tools. Use when the user asks to categorize a failure, understand why a run failed, triage…
68.5K installsnpx skills add https://github.com/momentic-ai/skills --skill momentic-result-classificationTesting & QA
Refines raw ideas into sharp, actionable concepts through structured divergent and convergent thinking. Use when an idea is still vague, when you need to stress-test assumptions before committing to a plan, or when you want to expand options before converging on one. Triggers…
67.8K installsnpx skills add https://github.com/addyosmani/agent-skills --skill idea-refineTesting & QA
Tests in real browsers via Chrome DevTools MCP. Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, capture console errors, analyze network requests, profile performance, or verify visual output with real runtime data. Requires…
67.2K installsnpx skills add https://github.com/addyosmani/agent-skills --skill browser-testing-with-devtoolsTesting & QA
Subjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before proceeding, when stress-testing a plan for hidden failure modes, when correctness matters more than speed, when working in…
65.3K installsnpx skills add https://github.com/addyosmani/agent-skills --skill doubt-driven-developmentTesting & QA
Quality audit of a whole repo: bugs, security holes, what breaks under real load, risky code without tests, slow paths, and what to delete, merge or split. Ranked, each finding explained in plain English. One-shot report, changes nothing. Use for "audit this codebase", "review…
54.9K installsnpx skills add https://github.com/dietrichgebert/ponytail --skill ponytail-auditTesting & QA
Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.
47K installsnpx skills add https://github.com/antfu/skills --skill vitestTesting & QA
Implement a component-level test using `WidgetTester` to verify UI rendering and user interactions (tapping, scrolling, entering text). Use when validating that a specific widget displays correct data and responds to events as expected.
41.2K installsnpx skills add https://github.com/flutter/agent-plugins --skill flutter-add-widget-testTesting & QA
Configures Flutter Driver for app interaction and converts MCP actions into permanent integration tests. Use when adding integration testing to a project, exploring UI components via MCP, or automating user flows with the integration_test package.
40.1K installsnpx skills add https://github.com/flutter/agent-plugins --skill flutter-add-integration-testTesting & QA
Test a live website with Firecrawl browser and write up what's broken: links, forms, mobile layout, performance and console errors. Use for pre-launch checks, bug hunts or confirming a deployed site works.
31.6K installsnpx skills add https://github.com/firecrawl/firecrawl-workflows --skill firecrawl-qaTesting & QA
Build crafted, highly detailed, interactive isometric SVG figures that explain a technical idea as a real physical object (a test rig, a dial gauge, a cabinet…
31.2K installsnpx skills add https://github.com/wheresryan22/anatomy --skill anatomyTesting & QA
Build, debug, or review Cloudflare Workers invoked by the Forward action in Gateway HTTP policies, including the GatewayMiddleware entrypoint, Gateway types, context, and continuation.
18.9K installsnpx skills add https://github.com/cloudflare/skills --skill gateway-workersTesting & QA
Write and organize unit tests for functions, methods, and classes using `package:test`. Use when creating new logic or fixing bugs to ensure code remains correct and regression-free.
16.3K installsnpx skills add https://github.com/flutter/agent-plugins --skill dart-add-unit-testTesting & QA
Define and generate mock objects for external dependencies using `package:mockito` and `build_runner`. Use when unit testing classes that depend on complex external services like APIs or databases.
15.9K installsnpx skills add https://github.com/flutter/agent-plugins --skill dart-generate-test-mocksTesting & QA
Set up, review, debug, or validate an Orca per-workspace environment recipe: the on-demand, disposable runtime (cloud sandbox, VM, SSH host, or local container) Orca creates fresh for each workspace. Use to stand up a new recipe end to end, fix an `environmentRecipes` entry in…
12.5K installsnpx skills add https://github.com/stablyai/orca --skill orca-per-workspace-envTesting & QA
Apply when debugging. Trace each symptom back to the first place the system went wrong and fix it there. A guard is a fix only when the state it handles is legitimate.
8.7K installsnpx skills add https://github.com/backnotprop/pstack --skill principle-fix-root-causesTesting & QA
Apply when you write, change, or keep a test. Assert what the code's users can observe, so that the test fails when that behavior breaks and keeps passing when only the internals change.
8.1K installsnpx skills add https://github.com/backnotprop/pstack --skill principle-test-behavior-not-implementationTesting & QA
Use only when the user explicitly asks for TDD, a failing test, or a regression test, OR when the bug has an obvious cheap local test target. Skip when the test path is unclear, expensive, integration-heavy, or not requested.
8K installsnpx skills add https://github.com/backnotprop/pstack --skill tddTesting & QA
Entry P0 primary router and operating doctrine for HackSkills. Use when the task involves web application testing, API security assessment, recon, vulnerability triage, exploit path planning, authorized pentest, code audit, source-leak mining, middleware audit, SOC triage,…
4.6K installsnpx skills add https://github.com/yaklang/hack-skills --skill hackTesting & QA
Reconnaissance and methodology playbook. Use when mapping assets, discovering endpoints, fingerprinting technology, and building a structured testing plan for a new target.
4.3K installsnpx skills add https://github.com/yaklang/hack-skills --skill recon-and-methodologyTesting & QA
Use this to test a live site and return a unified QA report.
4.3K installsnpx skills add https://github.com/firecrawl/skills --skill firecrawl-qa