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Found 32 Skills
Provides test design patterns, coverage strategies, and best practices for comprehensive test suite development
Apply London (mock-based) and Chicago (state-based) TDD schools. Use when practicing test-driven development or choosing testing style for your context.
Use before writing any type of tests. Distills 14 industry sources into deterministic decision gates, schemas, and worked test examples.
Test-Driven Development methodology and red-green-refactor workflow (formerly test-tdd). This skill should be used when practicing TDD, writing tests first, designing tests before implementation, or reviewing test-first approaches. Triggers on "write tests first", "test before code", "red green refactor", "test driven development". This skill does NOT cover Vitest framework specifics (use vitest skill) or API mocking with MSW (use msw skill).
Design a rigorous A/B test or experiment when the user asks to create an experiment, design an A/B test, or validate a hypothesis
Use when solution space exploration is complete and you're ready to create an implementation plan. Enforces "simple over easy" - the fundamentally right solution, not the path of least resistance. Triggers after /design-solution, when a solution has been chosen, or when asked to "make a plan" or "create a plan".
Third-party perspective analysis and improvement skills for marketing pages. Targets: Landing Pages (LP), Home Pages (HP), Pricing Pages, Feature Pages, Blogs. Integrates CRO frameworks and direct response principles (Schwartz/Hopkins/Ogilvy). Usage scenarios: (1) Page audit/analysis requests (2) Conversion improvement consultations (3) Copywriting improvements (4) A/B test design (5) Implementation prioritization. Trigger examples: "Analyze my LP", "Want to increase conversion rate", "Review pricing page", "Improve hero section", "Optimize CTA", "HP improvement proposal"
Use this skill when planning user research, conducting usability tests, creating journey maps, or designing A/B experiments. Triggers on user interviews, usability testing, user journey maps, A/B test design, survey design, persona creation, card sorting, tree testing, and any task requiring user experience research methodology or analysis.
Provides guidance for property-based testing across multiple languages and smart contracts. Use when writing tests, reviewing code with serialization/validation/parsing patterns, designing features, or when property-based testing would provide stronger coverage than example-based tests.
Write and evaluate effective Python tests using pytest. Use when writing tests, reviewing test code, debugging test failures, or improving test coverage. Covers test design, fixtures, parameterization, mocking, and async testing.
Use this skill when you need to create high-quality test cases with normal, exception, and boundary scenarios; triggers include test case writing and test design.
Design and execute marketing A/B tests for landing pages, email campaigns, ad creatives, and pricing with proper test design and result analysis. Use this skill when the user needs to test marketing variations, improve conversion rates through experimentation, or decide between two campaign approaches — even if they say 'which version performs better', 'test this landing page', 'A/B test our email subject line', or 'should we change our CTA'.