sdd-spec

Writes delta specifications with requirements and Given/When/Then scenarios.

Triggers: /sdd-spec <change-name>, write specs, specifications, functional requirements, sdd spec

Purpose

Specs define WHAT the system must do from the perspective of observable behavior. They do not say how to implement it. They are the source of truth for verification.

Key concept — Delta Specs: Specs are deltas (changes) on top of what already exists, not full replacements.

• If there is no existing spec: I write a complete spec
• If a spec already exists: I write ADDED/MODIFIED/REMOVED sections