lamina-edge-cases

# Distinct product risks Use `scenarios[]` for observable behavior that differs from the primary path. One scenario represents one distinct risk; reuse its `risk_key` rather than multiplying equivalent cases across actors and surfaces. Prioritize: - Declared operation failures. - Unmet dependencies. - Forbidden authority or ownership. - Invalid and stale transitions. - Concurrent consequential mutations. - Destructive confirmation and recovery. - External failure that changes product behavior. Every scenario declares `given[]`, `when.operation_ref`, `then[]`, `covers[]`, metadata, and a unique `risk_key`. Acceptance must be externally observable. “Handle gracefully” is not acceptance. Query the workflow closure and add only missing distinct risk Statements. Persona preferences do not become Scenarios unless they reveal a structural, safety, or evidence-backed failure.