# Skills for Testing and QA

Skills for Testing and QA: what each one does, an install command and example prompts.

1762 cards · page 40 of 45

- HTML: https://affpapa.org/en/nevibecode/skills/topic/testing?page=40
- Instructions for agents: https://affpapa.org/en/nevibecode/agents.md

- [manufacturing-expert](https://affpapa.org/en/nevibecode/skills/manufacturing-expert.md) — skill · personamanagmentlayer · Claude Code, Codex, Cursor +3 · 613 installs — This skill gives coding agents manufacturing context for Industry 4.0, MES, PLCs, and quality analysis.
- [diagnose](https://affpapa.org/en/nevibecode/skills/legendapp-diagnose.md) — skill · LegendApp · Claude Code, Codex, Cursor +3 · 423 installs — A skill that investigates a bug through falsifiable hypotheses, discriminating probes and recorded evidence, then reports how solid the answer is.
- [clawd-code-python-port](https://affpapa.org/en/nevibecode/skills/clawd-code-python-port.md) — skill · reason-machines · Claude Code, Codex, Cursor +3 · 757 installs — A Python port of an agent harness with tools, commands, task orchestration, and a CLI.
- [ux-researcher](https://affpapa.org/en/nevibecode/skills/ux-researcher.md) — skill · dylantarre · Claude Code, Codex, Cursor +3 · 525 installs — Turns your agent into a UX researcher who plans motion studies on perception, errors and task completion.
- [diagnose-fix-loop](https://affpapa.org/en/nevibecode/skills/diagnose-fix-loop.md) — skill · LegendApp · Claude Code, Codex, Cursor +3 · 420 installs — A skill that keeps the agent looping: diagnose, make one scoped fix, verify with the same signal, diagnose again.
- [playwright](https://affpapa.org/en/nevibecode/skills/oakoss-playwright.md) — skill · oakoss · Claude Code, Codex, Cursor +3 · 452 installs — A skill that teaches your agent the Playwright API: locators, assertions, screenshots and PDFs, stealth mode, authenticated sessions, error fixes.
- [verification](https://affpapa.org/en/nevibecode/skills/verification.md) — skill (official OpenAI) · Vercel Labs · Codex, ChatGPT · 8 installs — Traces and tests full user flows end-to-end across browser, API, and data layers when a dev server starts or something breaks.
- [test-coverage](https://affpapa.org/en/nevibecode/skills/test-coverage.md) — skill · cognitedata · Claude Code, Codex, Cursor +3 · 1900 installs — A skill that finds coverage gaps in a Flows app and closes them: configures tooling, writes the missing tests, refactors code for testability.
- [cypress](https://affpapa.org/en/nevibecode/skills/claude-mpm-team-cypress.md) — skill · Claude MPM Team · Claude Code, Codex, Cursor +3 · 653 installs — A skill for writing Cypress E2E and component tests: stable selectors, deterministic waits and network stubbing instead of fixed sleeps.
- [implementation-debugging](https://affpapa.org/en/nevibecode/skills/implementation-debugging.md) — skill · dylantarre · Claude Code, Codex, Cursor +3 · 486 installs — This skill diagnoses web animation glitches and broken transitions.
- [spinning-up-deep-rl](https://affpapa.org/en/nevibecode/skills/spinning-up-deep-rl.md) — skill · Alireza Rezvani · Claude Code · 8 installs — A deep RL knowledge base for Claude Code, covering algorithms, policy gradients, and silent bugs.
- [a11y](https://affpapa.org/en/nevibecode/skills/a11y.md) — skill · aladicf · Claude Code, Codex, Cursor +3 · 561 installs — Walks the interface through keyboard, screen reader, contrast and semantics checks, then fixes what it finds.
- [harden](https://affpapa.org/en/nevibecode/skills/aladicf-harden.md) — skill · aladicf · Claude Code, Codex, Cursor +3 · 539 installs — Runs your interface through edge cases: long text, network errors, RTL, empty states.
- [inngest-agent-evals](https://affpapa.org/en/nevibecode/skills/inngest-agent-evals.md) — skill · inngest · Claude Code, Codex, Cursor +3 · 556 installs — Guides the setup of production AI agent evaluations, direct and deferred scoring, session grouping, and prompt experiments in Inngest workflows.
- [maestro-e2e](https://affpapa.org/en/nevibecode/skills/maestro-e2e.md) — skill · raphaelbarbosaqwerty · Claude Code, Codex, Cursor +3 · 533 installs — A skill that helps your agent write and debug Maestro E2E tests: login, signup, navigation, permission dialogs.
- [auditing-experiments-flags](https://affpapa.org/en/nevibecode/skills/auditing-experiments-flags.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 432 installs — Runs configuration audits on PostHog experiments and feature flags, flagging staleness and best-practice violations.
- [analyzing-experiment-session-replays](https://affpapa.org/en/nevibecode/skills/analyzing-experiment-session-replays.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 431 installs — Guides coding agents through reviewing PostHog session recordings across experiment variants to spot UX flaws and understand user differences.
- [fastify](https://affpapa.org/en/nevibecode/skills/fastify.md) — skill · Claude MPM Team · Claude Code, Codex, Cursor +3 · 571 installs — A skill that feeds your coding agent production Fastify patterns for TypeScript: schema validation, plugins, error handling, inject tests.
- [exploring-llm-evaluations](https://affpapa.org/en/nevibecode/skills/exploring-llm-evaluations.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 411 installs — A skill for working with PostHog AI observability evaluations: find configs, run them against specific generations, and schedule reports.
- [flows-code-review](https://affpapa.org/en/nevibecode/skills/flows-code-review.md) — skill · cognitedata · Claude Code, Codex, Cursor +3 · 1600 installs — Executes the technical review step for Cognite Flows app certification locally.
- [browsing-with-playwright](https://affpapa.org/en/nevibecode/skills/browsing-with-playwright.md) — skill · bilalmk · Claude Code, Codex, Cursor +3 · 1700 installs — A Playwright MCP skill for navigating pages, submitting forms, taking screenshots, and extracting data.
- [diagnosing-missing-recordings](https://affpapa.org/en/nevibecode/skills/diagnosing-missing-recordings.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 397 installs — Diagnoses why PostHog session replays were not captured.
- [investigating-replay](https://affpapa.org/en/nevibecode/skills/investigating-replay.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 389 installs — Gathers PostHog session replay metadata, user profiles, timeline events, and linked error tracking issues into a single report.
- [java-testing-advanced](https://affpapa.org/en/nevibecode/skills/java-testing-advanced.md) — skill · pluginagentmarketplace · Claude Code, Codex, Cursor +3 · 328 installs — A Java testing skill that spins up real databases and Kafka in containers, checks API contracts, and hunts coverage gaps with mutation testing.
- [bluehammer-vulnerability-poc](https://affpapa.org/en/nevibecode/skills/bluehammer-vulnerability-poc.md) — skill · reason-machines · Claude Code, Codex, Cursor +3 · 570 installs — A skill that walks the agent through the BlueHammer repo: building the C exploit, running it, and reading the vulnerability code.
- [managing-experiment-lifecycle](https://affpapa.org/en/nevibecode/skills/managing-experiment-lifecycle.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 379 installs — A PostHog skill that walks an experiment through its states: launch, pause, freeze exposure, end, archive, and migration of a legacy experiment to the new engine.
- [finding-experiments](https://affpapa.org/en/nevibecode/skills/finding-experiments.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 378 installs — Resolves loose names, statuses, or relative dates into concrete PostHog experiment IDs.
- [task-workflow](https://affpapa.org/en/nevibecode/skills/task-workflow.md) — skill · customware-ai · Claude Code, Codex, Cursor +3 · 1900 installs — Turns a task into a phased protocol with artifacts and gates, and blocks the agent from stopping before phase 7.
- [finding-replay-for-issue](https://affpapa.org/en/nevibecode/skills/finding-replay-for-issue.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 375 installs — Picks the session recording that actually shows what the user did before an error, instead of guessing among hundreds of linked sessions.
- [triaging-visual-review-runs](https://affpapa.org/en/nevibecode/skills/triaging-visual-review-runs.md) — skill · PostHog · Claude Code, Codex, Cursor +3 · 368 installs — Inspects PostHog Visual Review runs on pull requests, diagnoses Playwright snapshot diffs, and isolates flaky Storybook regressions.
- [ux-research-discovery-testing](https://affpapa.org/en/nevibecode/skills/ux-research-discovery-testing.md) — skill · hueyexe · Claude Code, Codex, Cursor +3 · 468 installs — Gives your agent a working method for discovery interviews, usability tests and synthesis, so product calls rest on observed behavior instead of opinions.
- [encore-go-testing](https://affpapa.org/en/nevibecode/skills/encore-go-testing.md) — skill · encoredev · Claude Code, Codex, Cursor +3 · 556 installs — Write and run Encore Go tests with encore test and Go’s standard testing package.
- [performance-benchmark-specialist](https://affpapa.org/en/nevibecode/skills/performance-benchmark-specialist.md) — skill · manutej · Claude Code, Codex, Cursor +3 · 456 installs — Sets up benchmarks for shell tools: warmup runs, statistics, and target checks like <100ms and >90% cache hit rate.
- [cure](https://affpapa.org/en/nevibecode/skills/cure.md) — skill · paulnsorensen · Claude Code, Codex, Cursor +3 · 642 installs — Takes selected findings from an /age report, a findings list or a CI failure, applies the fixes and runs the project gates.
- [hummingbot-developer](https://affpapa.org/en/nevibecode/skills/hummingbot-developer.md) — skill · hummingbot · Claude Code, Codex, Cursor +3 · 355 installs — This skill builds and runs Hummingbot, Gateway, and the API from source.
- [java-testcontainers](https://affpapa.org/en/nevibecode/skills/java-testcontainers.md) — skill (official GitHub) · github · GitHub Copilot · 1 install — Helps write Java integration tests using Testcontainers 2.x and JUnit Jupiter with Docker dependencies.
- [java-debugging](https://affpapa.org/en/nevibecode/skills/java-debugging.md) — skill (official GitHub) · github · GitHub Copilot · 1 install — A skill that walks the agent through finding a Java bug: reproduce, narrow down, test one hypothesis, attach a debugger.
- [press](https://affpapa.org/en/nevibecode/skills/press.md) — skill · paulnsorensen · Claude Code, Codex, Cursor +3 · 636 installs — Runs a tests-only adversarial pass against freshly changed behavior.
- [pasteurize](https://affpapa.org/en/nevibecode/skills/pasteurize.md) — skill · paulnsorensen · Claude Code, Codex, Cursor +3 · 632 installs — The skill walks an agent through a reliable reproduction, a named cause, a regression test and the smallest possible fix.
- [shell-testing-framework](https://affpapa.org/en/nevibecode/skills/shell-testing-framework.md) — skill · manutej · Claude Code, Codex, Cursor +3 · 439 installs — This skill guides Bash test design, from Arrange–Act–Assert structure to coverage checks and performance validation.

Next: https://affpapa.org/en/nevibecode/skills/topic/testing.md?page=41

## Refine
[qa](https://affpapa.org/en/nevibecode/tag/qa.md) · [debugging](https://affpapa.org/en/nevibecode/tag/debugging.md) · [typescript](https://affpapa.org/en/nevibecode/tag/typescript.md) · [python](https://affpapa.org/en/nevibecode/tag/python.md) · [ci-cd](https://affpapa.org/en/nevibecode/tag/ci-cd.md) · [accessibility](https://affpapa.org/en/nevibecode/tag/accessibility.md) · [e2e](https://affpapa.org/en/nevibecode/tag/e2e.md) · [tdd](https://affpapa.org/en/nevibecode/tag/tdd.md) · [ios](https://affpapa.org/en/nevibecode/tag/ios.md) · [dotnet](https://affpapa.org/en/nevibecode/tag/dotnet.md) · [java](https://affpapa.org/en/nevibecode/tag/java.md) · [cli](https://affpapa.org/en/nevibecode/tag/cli.md)

## Narrow this list
Parameters: `?platform=<claude-code|codex|cursor|copilot|gemini-cli|windsurf|…>`, `&topic=<…>`, `&sort=installs|stars|new|updated` — values in https://affpapa.org/en/nevibecode/agents.md

---
NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md