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**Where each column comes from.**
- **Sections** are the ids on the headings (`{#vault}`) and the behaviour codes on spec lines (`^vault-3`); the same id in every document lines them up.
-- **Spec and Design** are the topics tagged for them (and a project's **Features** topic, from when it was hero or creator); **implementation** topics (pick one at the top) say where each part is built; **Tests** lists the design tests and code tests that cover each code, and their status (tested, gap, not built).
+- **Spec and Design** are the topics tagged for them (and a project's `Spec`, the maker's Specification from when it was hero or creator); **implementation** topics (pick one at the top) say where each part is built; **Tests** lists the design tests and code tests that cover each code, and their status (tested, gap, not built).
- The markers **D, I, T** show which levels a section has; a missing one counts as a gap.
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