The skill is lean and efficient, avoiding explanations of concepts Claude already knows. Every section serves a purpose with no padding or unnecessary context about what acceptance criteria are.

Provides fully concrete guidance with executable Gherkin examples, specific bash commands for validation, and a complete worked example showing the transformation from vague requirement to testable criteria.

Clear 5-step workflow with explicit validation checklist at the end. The worked example demonstrates each step in sequence, and the verification checklist provides a feedback loop before sign-off.

Well-structured with clear overview sections and one-level-deep references to detailed materials (INVEST criteria, Gherkin examples, templates). Quick Reference table provides easy navigation to supporting files.

Lists multiple specific concrete actions: 'Write clear, testable acceptance criteria', 'defining done conditions', 'creating measurable requirements', 'applying INVEST checks', 'documenting negative scenarios', and 'aligning product, engineering, and QA'.

Clearly answers both what ('Write clear, testable acceptance criteria for user stories and feature delivery') and when ('use when defining done conditions, creating measurable requirements, applying INVEST checks, documenting negative scenarios, and aligning product, engineering, and QA on expected outcomes').

Includes natural keywords users would say: 'acceptance criteria', 'user stories', 'done conditions', 'measurable requirements', 'INVEST checks', 'negative scenarios', 'feature delivery', 'QA'. These cover common variations of how users discuss requirements and story writing.

Clear niche focused specifically on acceptance criteria and user story requirements. The specific mentions of INVEST checks, done conditions, and cross-team alignment (product/engineering/QA) make it distinct from general documentation or project management skills.