> browse/registry

> add-addons-existing-app

Apply integrations to existing projects with tanstack add, including add-on id resolution, dependency chains, option prompts, and .cta.json project metadata preconditions.

> designing-tests

Designs and implements testing strategies for any codebase. Use when adding tests, improving coverage, setting up testing infrastructure, debugging test failures, or when asked about unit tests, integration tests, or E2E testing.

> javascript-language

Modern JavaScript (ES2022+) patterns for clean, maintainable code. Use when working with modern JavaScript features like optional chaining, nullish coalescing, or ESM. (triggers: **/*.js, **/*.mjs, **/*.cjs, const, let, arrow, async, await, promise, destructuring, spread, class)

> create-app-scaffold

Scaffold a TanStack app with tanstack create using --framework, --template, --toolchain, --deployment, --add-ons, and --router-only. Covers flag compatibility, non-interactive defaults, and intent-preserving command construction.

> laravel-background-processing

Scalable asynchronous workflows using Queues, Jobs, and Events. Use when implementing queued jobs, event-driven workflows, or async processing in Laravel. (triggers: app/Jobs/**/*.php, app/Events/**/*.php, app/Listeners/**/*.php, ShouldQueue, dispatch, batch, chain, listener)

> unit-testing-test-generate

Generate comprehensive, maintainable unit tests across languages with strong coverage and edge case focus.

> tdd

Enforces Test-Driven Development (Red-Green-Refactor). Use when writing unit tests, implementing TDD, or improving test coverage for any feature.

> crewai-multi-agent

Multi-agent orchestration framework for autonomous AI collaboration. Use when building teams of specialized agents working together on complex tasks, when you need role-based agent collaboration with memory, or for production workflows requiring sequential/hierarchical execution. Built without LangChain dependencies for lean, fast execution.

> android-testing

Standards for Unit Tests, UI Tests (Compose), and Hilt Integration. Use when writing unit tests, Compose UI tests, or Hilt test modules in Android. (triggers: **/*Test.kt, **/*Rule.kt, @Test, runTest, composeTestRule)

> langchain

Framework for building LLM-powered applications with agents, chains, and RAG. Supports multiple providers (OpenAI, Anthropic, Google), 500+ integrations, ReAct agents, tool calling, memory management, and vector store retrieval. Use for building chatbots, question-answering systems, autonomous agents, or RAG applications. Best for rapid prototyping and production deployments.

> common-tdd

Enforces Test-Driven Development (Red-Green-Refactor). Use when writing unit tests, implementing TDD, or improving test coverage for any feature. (triggers: **/*.test.ts, **/*.spec.ts, **/*_test.go, **/*Test.java, **/*_test.dart, **/*_spec.rb, tdd, unit test, write test, red green refactor, failing test, test coverage)

> axiom-code-signing

Use when setting up code signing, managing certificates, configuring provisioning profiles, debugging signing errors, setting up CI/CD signing, or preparing distribution builds. Covers certificate lifecycle, automatic vs manual signing, entitlements, fastlane match, Keychain management, and App Store distribution signing.

> php-testing

Unit and integration testing standards for PHP applications. Use when writing PHPUnit unit tests or integration tests for PHP applications. (triggers: tests/**/*.php, phpunit.xml, phpunit, pest, mock, assert, tdd)

> axiom-swift-testing

Use when writing unit tests, adopting Swift Testing framework, making tests run faster without simulator, architecting code for testability, testing async code reliably, or migrating from XCTest - covers @Test/@Suite macros,

> TypeScript Tooling

Development tools, linting, and build config for TypeScript. Use when configuring ESLint, Prettier, Jest, Vitest, tsconfig, or any TS build tooling.

> spring-boot-testing

Standards for unit, integration, and slice testing in Spring Boot 3. Use when writing unit tests, integration tests, or slice tests for Spring Boot 3 applications. (triggers: **/*Test.java, webmvctest, datajpatest, testcontainers, assertj)

> typescript-tooling

Development tools, linting, and build config for TypeScript. Use when configuring ESLint, Prettier, Jest, Vitest, tsconfig, or any TS build tooling. (triggers: tsconfig.json, .eslintrc.*, jest.config.*, package.json, eslint, prettier, jest, vitest, build, compile, lint)

> test-skill

A test skill for unit tests

> nextjs-testing

Unit, Integration, and E2E testing standards for App Router. Use when writing unit, integration, or Playwright E2E tests for a Next.js App Router project. (triggers: **/*.test.{ts, tsx}, cypress/**, tests/**, vitest, playwright, msw, testing-library)

> react-native-security

Secure storage, deep linking security, and certificate pinning for mobile. Use when implementing secure storage, certificate pinning, or deep link validation in React Native. (triggers: **/*.tsx, **/*.ts, security, keychain, secure-storage, deep-link, certificate-pinning)