acceptance-test-from-criteria

Overview

Per ISTQB Glossary V4.7.1: ATDD (Acceptance Test-Driven Development) is "a collaboration-based test-first approach that defines acceptance tests in the stakeholders' domain language."

The shift-left flow:

Story → AC → Acceptance test (this skill) → Implementation → Pass

The acceptance test is written first (test-first); the implementation follows; success = test passes.

This is BDD's variant where the AC is the source of truth; the test is the executable formalization.