b02d3e4c03
The dedup guard pinned 'no duplicate stamp' — under the header baseline no stamping exists, so its event-count assertion became a tautology and its fence assertions a subset of the stale-seed case. The spec docblock claimed the session invariants pin the stamping design (superseded); it now names the three review-found timing threats the suite pins as distinct shapes. Service overrideOf JSDoc shrinks to a pointer at the owning pure export.