Check Invariants

Judge whether a design (or a diff) honors the architecture invariants it relies on.

This is the semantic counterpart to trace. trace checks that a Respects: ARCH-N citation points at a live invariant — existence and liveness, deterministically, by grep. It never reads whether the design actually respects the rule. That judgment is this skill's job, and because it is a judgment it is advisory: its verdicts inform review, they are never a hard merge gate.

When there is nothing to check

If docs/architecture/ does not exist, there is no spine — say so once and stop. This skill only runs where a project has opted into the architecture layer.

Inputs