General constraints

Rules that belong to no single box, checked on every review rather than only when a matching box is touched.

A box's constraints live with the box. These are the ones that would otherwise be written into whichever box happened to notice them first — and then never read by a review of the box that breaks them.

Topics

• No knowable rework — the final shape of what's needed now.
• A feature a user sees arrives on the deck — the showcase deck shows every capability, so the change adds or remakes its slide.
• Surface area arrives with its consumer — a Markdown extension, layout, CLI flag, config field, extension hook or CSS hook is added only when something in the repository needs it.