Best agent skills for testing and QA

1

Systematic Debuggingobra/superpowers

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

Shell

296k

Systematic Debugging has 296,071 GitHub stars, has 280,800 installs on skills.sh, runs without an API key, works with Claude Code, Codex and Cursor, is written in Shell and was last updated in September 2026.

2

TDDmattpocock/skills

Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.

Shell

278k

TDD has 278,361 GitHub stars, has 1,028,752 installs on skills.sh, runs without an API key, works with Claude Code and Codex, is written in Shell and was last updated in October 2026.

3

Golang Testingaffaan-m/ECC

Go testing patterns including table-driven tests, subtests, benchmarks, fuzzing, and test coverage.

JavaScript

274k

Golang Testing has 274,402 GitHub stars, has 3 installs on skills.sh, runs without an API key, works with Claude Code, Codex and Cursor, is written in JavaScript and was last updated in October 2026.

4

Skill Creatoranthropics/skills

Create new skills, modify and improve existing skills, and measure skill performance.

Python

180k

Skill Creator has 179,945 GitHub stars, is published by the vendor itself, has 398,688 installs on skills.sh, runs without an API key, works with Claude Code, is written in Python and was last updated in October 2026.

5

Next Cache Components Optimizervercel/next.js

Optimize the meaningful UI available immediately from a Next.js route on an initial load (hard navigation) or named client-side navigation (soft navigation).

JavaScript

143k

Next Cache Components Optimizer has 143,231 GitHub stars, is published by the vendor itself, runs without an API key, works with Claude Code, is written in JavaScript and was last updated in October 2026.

6

iOS Cleangarrytan/gstack

Remove the DebugBridge SPM package and all #if DEBUG wiring from an iOS app.

TypeScript

136k

iOS Clean has 135,577 GitHub stars, runs without an API key, works with Claude Code, Codex and Cursor, is written in TypeScript and was last updated in October 2026.

7

Browser Usebrowser-use/browser-use

Direct browser control via CDP for web interaction: automation, scraping, testing, screenshots, and site/app work.

Python

117k

Browser Use has 117,307 GitHub stars, is published by the vendor itself, has 96,300 installs on skills.sh, needs an API key or token, works with Claude Code, Codex and Cursor, is written in Python and was last updated in October 2026.

8

Surgical PatchJuliusBrussee/caveman

Fix bugs and small behavior changes at the narrowest responsible layer.

Go

110k

Surgical Patch has 110,252 GitHub stars, has 84,964 installs on skills.sh, runs without an API key, works with Claude Code, Codex and Cursor, is written in Go and was last updated in October 2026.

9

Debugging And Error Recoveryaddyosmani/agent-skills

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.

JavaScript

102k

Debugging And Error Recovery has 102,166 GitHub stars, has 825 installs on skills.sh, runs without an API key, works with Claude Code, Codex and Cursor, is written in JavaScript and was last updated in October 2026.

10

Mode Creatorthedotmack/claude-mem

Interactively create, install, activate, and verify custom claude-mem modes, including domain-specific observation types, concept tags, optional Telegram alerts, bot setup, worker restart, and…

TypeScript

97k

Mode Creator has 97,272 GitHub stars, runs without an API key, works with Claude Code, Codex and Cursor, is written in TypeScript and was last updated in October 2026.