What is Acceptance Criteria?

Acceptance criteria define the boundaries of a user story. They answer the question: "How will we know this story is done?" Without acceptance criteria, teams risk building features that technically work but miss the intent of the original requirement. Well-written criteria create a shared, testable definition of success that developers, testers, and stakeholders can all agree on before work begins.

Acceptance criteria are typically written as a list of conditions that must all be true for the story to pass. Some teams write them as simple bullet points; others use the more structured Given/When/Then (Gherkin) format popularised by behavior-driven development. The Given/When/Then format is especially useful because it ties each criterion to a specific user action and an expected outcome, making it straightforward to convert criteria directly into automated tests.

Good acceptance criteria are unambiguous, testable, and focused on behavior rather than implementation details. They should describe what the system does, not how it does it. For example, "The login form validates email format" is a behavioral criterion; "The login form uses a regex pattern /^[a-z0-9]/" is an implementation detail that belongs in a technical specification, not an acceptance criterion.

Codepylot's AI story rewrite feature automatically generates acceptance criteria in Given/When/Then format alongside the story title, description, story points, and priority. This means teams can go from a rough idea to a fully specified, board-ready story in seconds. When an AI coding agent then picks up that story, it uses the acceptance criteria as a specification — dramatically reducing ambiguity and back-and-forth between the agent and the human reviewer.