finishing-a-development-branch

testing-anti-patterns

withzombies

Use when writing or changing tests, adding mocks, or tempted to add test-only methods to production code - prevents testing mock behavior, production pollution with test-only methods, and mocking without understanding dependencies

refactoring-safely

withzombies

Use when refactoring code without breaking functionality - test-preserving transformations in small steps, running tests between each change, creating bd tasks for tracking refactoring work

writing-skills

withzombies

Use when creating new skills, editing existing skills, or verifying skills work before deployment - applies TDD to process documentation by testing with subagents before writing, iterating until bulletproof against rationalization

building-hooks

withzombies

Use when creating Claude Code hooks for automation, quality checks, or workflow enhancement - covers hook patterns, composition, testing, and progressive enhancement from simple to advanced

test-generator

alirezarezvani

Automatically suggest tests for new functions and components. Use when new code is written, functions added, or user mentions testing. Creates test scaffolding with Jest, Vitest, Pytest patterns. Triggers on new functions, components, test requests, testing mentions.

code-reviewer

alirezarezvani

Automatic code quality and best practices analysis. Use proactively when files are modified, saved, or committed. Analyzes code style, patterns, potential bugs, and security basics. Triggers on file changes, git diff, code edits, quality mentions.

testing-builder

Toowiredd

Automatically generates comprehensive test suites (unit, integration, E2E) based on code and past testing patterns. Use when user says "write tests", "test this", "add coverage", or after fixing bugs to create regression tests. Eliminates testing friction for ADHD users.

test-generator

CuriousLearner

Generate unit tests based on existing code patterns and testing frameworks.

code-reviewer

CuriousLearner

Automated code review with best practices, security checks, and quality standards.

seed-data-generator

CuriousLearner

Generate realistic test data for database development, testing, and demos.

data-validator

CuriousLearner

Validate data against schemas, business rules, and data quality standards.

Testing Test Writing

maxritter

Write focused tests for core user flows and critical paths with clear test names, behavior-focused assertions, mocked external dependencies, and fast execution, deferring edge case testing until explicitly required. Use this skill when creating or modifying test files, writing unit tests, integration tests, or test cases for any feature. Apply when writing test files (test/, __tests__/, spec/, .test.js, .spec.ts, test_*.py), implementing tests for core user workflows, testing critical business logic, mocking external dependencies (databases, APIs, file systems), writing descriptive test names, creating fast-running unit tests, or adding tests at logical completion points of feature development. Use for any task involving test creation, test coverage, test strategy, or test-driven development.