Best unit testing skills for Claude Code, Codex and other agents.

Jest patterns for React Native style tests: TDD discipline, mock factory functions, module and GraphQL hook mocking, custom render helpers and anti-patterns to avoid.

ChrisWiles/claude-code-showcase

Enforces red-green-refactor for Rust work, with idiomatic test patterns, a naming convention and a pre-commit gate of cargo fmt, clippy and test.

rtk-ai/rtk

Sets the test-writing workflow for the repository: risk-first scenario lists, behavior-focused Vitest tests, a full run before each commit and a coverage target.

iOfficeAI/AionUi

Walks through deprecating an R function or argument in a package: lifecycle warning, silenced tests, a new snapshot test, documentation badge and NEWS entry.

tidyverse/dplyr

Checks that every Python code block in a Markdown file actually compiles and runs, by extracting each block to a temporary file, executing it in an isolated subprocess, and writing a pass/fail…

google/adk-python

Run Kedro's local lint / format / type-check / tests on changed files (uses the project's pre-commit hooks, ruff, mypy, pytest, lint-imports, detect-secrets, Make targets — in the right venv), or…

kedro-org/kedro

Enforces red-green-refactor for new RTK output filters in Rust, using real captured fixtures, snapshot tests with insta and token-savings assertions.

rtk-ai/rtk

A skill your agent uses when writing new features, fixing bugs, or refactoring code.

hellangleZ/burn-in-cceverywhere-ralph

Implements missing CPython C-API functions in RustPython's crates/capi, mapping each header to its module with the pyo3-ffi header split.

RustPython/RustPython

Rules for writing, fixing and reviewing pytest unit tests that are hermetic: behavior-focused, deterministic, isolated and cheap to run.

dimensionalOS/dimos

Reviews newly written or edited tests against nine rules that cut test bloat, such as mock-heavy checks and near-duplicate cases, before they are committed.

amElnagdy/guard-skills

Deep-dive diagnosis of a Playwright test failure already isolated to one Quay Prow/OpenShift CI run: downloads its GCS artifacts (results.json, JUnit, build/pod logs, Jaeger traces), classifies real…

quay/quay

Creates or modify PHP unit tests for Dolibarr ERP/CRM functions and methods.

Dolibarr/dolibarr

对 Yakit 仓库的代码改动做规范化 code review：按代码逻辑、TS 定义、UI 引用与 Props、CSS 样式、依赖版本、配置项六个维度审查，检查测试用例缺失，强制执行 tsc 类型检查与 vitest 测试验证，输出「结果汇总 / 明细解释 / 合并结论」三块报告，经用户确认后写入文件。当用户要求 review、审查、评审代码改动，或在提交、合并、提 PR…

yaklang/yakit

A skill your agent uses when adding, moving, or wiring an internal REST endpoint in Trilium (a new /api/ route) — choosing between a core-shared handler (packages/trilium-core/src/routes/index.ts…

TriliumNext/Trilium

Generate React Native Reanimated animation code for React Native apps.

gluestack/gluestack-ui

Disciplined, reproducible loop for making an FLA kernel faster (Triton, Gluon, TileLang, CuTe) without ever breaking or gaming correctness.

fla-org/flash-linear-attention

Adds integration or unit tests to an OpenROAD module: writes the Tcl test, generates golden files and registers it in both CMake and Bazel.

The-OpenROAD-Project/OpenROAD

Verifies OpenLogi's native GPUI interface with focused tests, the component gallery and a mock agent, choosing the evidence that fits each change.

AprilNEA/OpenLogi

Scan all CI builds and tests, find failures, fetch error logs, and fix the code.

FastLED/FastLED

Instructions for writing, running, and updating unit/end-to-end tests.

TypeCellOS/BlockNote

Local development guide for the Happy pnpm monorepo: install, build, test and run the CLI, server, Expo app and Tauri desktop packages.

slopus/happy

Run, diagnose, and extend bitchat Android Mesh Lab physical-device tests.

permissionlesstech/bitchat-android

Use when running TiDB package tests and deciding whether failpoint enable/disable is required before and after the test command.

pingcap/tidb

A skill your agent uses when adding, changing, or reviewing an LLM/MCP tool in Trilium (the defineTools definitions under packages/trilium-core/src/services/llm/tools/ —…

TriliumNext/Trilium

Steps for adding or maintaining a WeChat official API in the WxJava SDK, following its Maven multi-module layout, Java 8 compatibility and TestNG test conventions.

binarywang/WxJava

Diagnose any Quay Prow job failure end to end: prowjob.json - top-level build log - JUnit - resolved failing step - Playwright results.json when the failing step is Playwright, continuing through…

quay/quay

Develops production-ready Triton kernels for Liger Kernel. An agent skill from linkedin/Liger-Kernel.

linkedin/Liger-Kernel

Creates Python projects with proper structure, virtual environments, and dependency management.

haddock-development/claude-reflect-system

A skill your agent uses for Pest PHP testing in Laravel projects only.

luadotsh/lua

Create and review Cloudflare Durable Objects. An agent skill from hodgef/apiker.

hodgef/apiker

Generates Vitest tests for every runnable code example on a JavaScript concept documentation page, following a four-phase extraction and conversion process.

leonardomso/33-js-concepts

Add a new AWS event source attribute (e.g., Kinesis, Kafka, MQ) to the Lambda .NET Annotations framework, including the attribute class, source generator integration, CloudFormation writer, unit…

aws/aws-lambda-dotnet

A skill your agent uses for test selection and quality across backend, frontend, and e2e; load its backend reference for Vitest projects, mocking, DB fixtures, and performance.

archestra-ai/archestra

A skill your agent uses when you need to write, review, or debug automated tests for applications built on the Jazz framework.

garden-co/classic-jazz

Workflow for WooCommerce development: run PHP and JavaScript tests, lint and fix code style on the current branch, and follow guides for i18n and markdown.

woocommerce/woocommerce

Adds or changes a DNS provider in the DDNS project while keeping its code, schemas, tests and Chinese and English docs consistent.

NewFuture/DDNS

A skill your agent uses when the user asks to create, draft, prepare, or publish a GitHub issue for the rocketmq-rust project — bugs, features, enhancements, refactors, docs, unit tests, CI…

mxsm/rocketmq-rust

Run or add ScottPlot 5 tests. Use for unit-test and cookbook-test work; unless explicitly asked otherwise, restrict manual test execution to the…

ScottPlot/ScottPlot

Iterative code refinement through plan → code → evaluate → refine cycles.

EvoScientist/EvoSkills

A skill your agent uses when writing, reviewing, or improving Go test code — including table-driven tests, subtests, parallel tests, test helpers, test doubles, and assertions with cmp.Diff.

cxuu/golang-skills

Sets up a local ADK Python development environment in a git clone of the open-source adk-python repository: a uv virtual environment, all dependency extras, pre-commit hooks, and a first unit-test…

google/adk-python

Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest).

pixel-point/animate-text

Run pytest tests with automatic virtual environment activation. Use this skill whenever running tests, executing pytest, or when asked to "run…

saleor/saleor

Writes unit tests for shell scripts with Bats: error-condition tests, fixtures and mocks, cross-shell checks, parallel runs, helper files and CI integration.

wshobson/agents

Add or change any text a player can see, in every locale the game ships in.

openfootmanager/openfootmanager

Enforce Sentry React Native SDK test conventions for naming, structure, mocking, and fixtures with Jest.

getsentry/sentry-react-native

Runs Google Test binaries in parallel with gtest-parallel to speed up single-threaded tests, repeat flaky ones and filter specific tests.

webrtc-sdk/webrtc