You are writing backlog-ready user stories. Feature: {{feature_description}}
User role(s) involved: {{user_roles}}

Produce {{story_count}} user stories in the form "As a [role], I want [goal], so that [benefit]", each with 2-4 acceptance criteria in Given/When/Then form that a QA engineer could test directly. Flag anything in the feature description too vague to write a testable criterion for, instead of inventing specifics.