Acceptance Criteria Skill Guidance

Use When

formalising deterministic Given-When-Then acceptance criteria for existing user stories; use user-story-generation when the backlog or personas have not yet been defined.
Use this procedure when the required source artefacts are available and Acceptance-criteria catalogue is the next lifecycle deliverable.

Use user-story-generation when that neighbouring route owns the decision or deliverable.
Do not invent missing project evidence, standards clauses, thresholds, or stakeholder decisions.

Artefact	Source or provider	Required?	Behaviour when missing
Approved user stories, business rules, quality thresholds, and error cases	Product owner, requirements baseline, and domain references	Yes	Stop the affected step, name the missing source, and return only a qualified gap record.