What problem does it solve? Teams practicing TDD often skip the red phase or write acceptance tests after implementation, losing the design feedback loop. This Skill generates failing-first acceptance test scaffolds from a story's acceptance criteria before any code exists, complete with fixtures, data factories, and a developer handoff checklist. ## Core Features & Use Cases - Red-Phase Scaffold Generation: Creates E2E, API, and component tests marked with test.skip() following Given-When-Then structure, mapped to acceptance criteria with P0-P3 priorities. - Test Infrastructure: Generates faker-based data factories, Playwright fixtures with auto-cleanup, mock requirements, and required data-testid attribute lists. - Tri-Modal Workflow: Supports Create, Resume, Validate, and Edit modes with step-file architecture, progress tracking frontmatter, and a validation checklist. - Use Case: Given a BMM story file for guest checkout, produce tests/e2e and tests/api scaffold files plus an ATDD checklist mapping each test to concrete implementation tasks for the dev team. ## Quick Start Ask the agent to write acceptance tests for a story file using ATDD, providing the path to the story markdown with its acceptance criteria.
