lean-shipping-calculator

Non-interactive sandbox implementation from an approved spec to a PR. Use when the user mentions "implement", "implement spec", "implement specs/<feature>.md", sandbox implementation, or autonomous implementation from a specification.

Generate a Spec Driven Development (SDD) document containing Business Context, Arch Decisions, and Technical Contract. Use when the user mentions "spec", "init spec", "create specification", references a file in the specs/ folder, or wants to create a feature specification.