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Found 421 Skills
Design failing tests for complex features using Independent Evaluation — dispatches a context-free agent that sees only the requirement spec and code paths (not the implementation approach), then returns executable failing tests. Use when starting TDD for a non-trivial feature, when the requirement is ambiguous enough that biased tests are a risk, or when the user asks for independent test design.
Requirements clarification for TDD. Use BEFORE RED phase to understand WHAT to test. Asks targeted questions to uncover ambiguities, edge cases, and acceptance criteria.
Core development principles and standards for consistent, high-quality code. Automatically applies DRY, KISS, YAGNI, SOLID, TDD, and micro-commit methodologies.
Build phase of RDD. Turns behavior scenarios into executable BDD specs, then implements via TDD (red/green/refactor). Enforces structure-vs-behavior separation, composable tests, and small reversible steps. Use after /rdd-decide when scenarios and domain model are approved.
Python testing with pytest, coverage, fixtures, parametrization, and mocking. Covers test organization, conftest.py, markers, async testing, and TDD workflows. Use when user mentions pytest, unit tests, test coverage, fixtures, mocking, or writing Python tests.
Use this skill when reviewing, writing, or refactoring code for cleanliness and maintainability following Robert C. Martin's (Uncle Bob) Clean Code principles. Triggers on code review, refactoring, naming improvements, function decomposition, applying SOLID principles, writing clean tests with TDD, identifying code smells, or improving error handling. Covers Clean Code, SOLID, and test-driven development.
Fix a bug with systematic debugging, TDD, and PR workflow
Small tweaks to existing features — no design needed, just TDD and PR
Guide for creating effective skills. This command should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations. 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
Transform design documents into TDD-based implementation plans with parallelizable tasks. Triggers: 'plan implementation', 'create tasks from design', or /plan. Enforces the Iron Law: no production code without a failing test first. Requires an existing design document — use /ideate first if none exists. Do NOT use for brainstorming, debugging, or code review.
Comprehensive testing specialization covering test strategy, automation, TDD methodology, test writing, and web app testing. Use when setting up test infrastructure, writing tests, implementing TDD workflows, analyzing coverage, integrating tests into CI/CD, or testing web applications with Playwright. Framework-agnostic approach with framework-specific guidance via reference files.
TDD workflow guide. Use PROACTIVELY when writing new features or fixing bugs. Enforces Red-Green-Refactor cycle and prevents testing anti-patterns.