Guides vertical-slice TDD workflows through RED-GREEN-REFACTOR cycles using public interfaces.
npx skills add https://github.com/evanklem/evanflow --skill evanflow-tdd
Please help me install this Agent Skill. Skill: evanflow-tdd Source: https://github.com/evanklem/evanflow/tree/main/skills/evanflow-tdd Command: npx skills add https://github.com/evanklem/evanflow --skill evanflow-tdd
Vertical-slice TDD enforces testing against public behavior and prevents brittle, implementation-driven code by guiding teams through one-test-at-a-time cycles.
Write one behavior test for a public contract and implement only enough code to pass, then refactor.
High-intent search queries and answers about installing and using this skill.
Vertical-slice TDD is a testing methodology that enforces building features through a strict RED-GREEN-REFACTOR cycle, emphasizing behavior via public interfaces rather than internal implementation details for reliable delivery.
To write tests using a public interface, you write a single behavior test that exercises a feature end-to-end via its public contract, implementing only enough code to pass before refactoring safely.
Yes, vertical-slice TDD applies to any production code change, including bug fixes and behavior changes, ensuring changes remain aligned with user-visible behavior across both backend services and frontend logic.
The best way to refactor safely during TDD is to follow strict per-cycle discipline, performing incremental refactors only after achieving a green test state to maintain a reliable safety net.
Testing implementation details creates brittle code because it couples tests to internal structures rather than user-visible behavior, whereas vertical-slice TDD focuses on public contracts to prevent implementation-driven breakage.
No specific testing frameworks are required to start vertical-slice TDD. The methodology focuses on the per-cycle RED-GREEN-REFACTOR workflow and testing via public interfaces, making it applicable to any production code environment.
timurgaleevGuide test-driven development cycles with vertical-slice tracer bullets.
ZhiruiFengGuide feature implementation and refactoring with style and integration requirements.
sswapnil2Enforces test-first development with RED-GREEN-REFACTOR cycles for fintech projects.
johannesfritzRun integration tests across services to validate end-to-end behavior.
