Best Claude Skills for Testing & QA

Test-driven development with vertical slices, behavior-focused tests, and incremental red-green-refactor cycles.

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

Structured debugging methodology that mandates root cause investigation before attempting any fixes.

Dispatch code review subagents with focused context to catch issues before they compound.

Write tests first, watch them fail, then implement minimal code to pass.

Enforce verification commands before claiming work completion, fixes, or test passes—no success assertions without fresh evidence.

Dispatch fresh subagents per task with two-stage review (spec compliance, then code quality) in the current session.

Evaluate code review feedback with technical rigor before implementing, avoiding performative agreement and blind implementation.

Test-driven documentation for creating reusable agent techniques, patterns, and reference guides.

Structured workflow for completing development branches with test verification and merge/PR options.

Browser automation with 40+ commands for navigation, interaction, form filling, and web testing.

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.

Comprehensive reference guide for writing, debugging, and maintaining Playwright tests across all testing types and scenarios.

End-to-end Solana development with framework-kit, @solana/kit, Anchor programs, and local testing.

ab testing

Build custom Expo development clients for testing native code on physical devices via EAS Build or locally.

Create, run, and maintain end-to-end tests using AI-driven browser automation with YAML serialization.

Drives development with tests. 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.

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 on "ideate", "refine this idea", or "stress-test my plan".

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 the chrome-devtools MCP server to be configured.

Production-ready Golang tests — table-driven tests, testify suites and mocks, parallel tests, fuzzing, fixtures, goroutine leak detection with goleak, snapshot testing, code coverage, integration tests, idiomatic test naming. Use when writing or reviewing Go tests, choosing a testing approach, se...

Automates CI/CD pipeline setup. Use when setting up or modifying build and deployment pipelines. Use when you need to automate quality gates, configure test runners in CI, or establish deployment strategies.

Extracts what the user actually wants instead of what they think they should want. Achieves this through one-question-at-a-time interview until ~95% confidence about the underlying intent. Use when an ask is underspecified ("build me X" without "for whom" or "why now"), when the user explicitly invokes ("interview me", "grill me", "are we sure?", "stress-test my thinking"), or when you catch yourself silently filling in ambiguous requirements before any plan, spec, or code exists.

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.