diff --git a/internal/check-research-gallery-embed.mjs b/internal/check-research-gallery-embed.mjs
index a1d5b84cc..7867b7bb9 100644
--- a/internal/check-research-gallery-embed.mjs
+++ b/internal/check-research-gallery-embed.mjs
@@ -71,10 +71,21 @@ const NEIGHBOUR_KNOWN = {
 }
 // KNOWN, ROUTED gaps in a composite's internal link (not measurable as pass/fail yet: no DOM hook).
 const LINKED_KNOWN = {
-  // upg-100-mfe.vue:143-148 answers `doxa-upg-100-list:show-on-map` with go('map') only; it never
-  // re-dispatches `doxa:select-zone` (the event upg-100-list.vue:1366-1381 isolates a zone on), so
-  // "Show on map" scrolls to the map without selecting that list's zone. Routed 2026-09-25.
-  'upg-100: "Show on map" does not select the zone on the map': 'upg100-plugin (upg-100-mfe.vue:143 re-dispatch doxa:select-zone)',
+  // EMPTY ON PURPOSE. The one entry — upg-100's "Show on map" not selecting the zone, routed 2026-09-25 —
+  // is DELETED as STALE, not waived. It outlived its defect by three landings, and the gate's own contract
+  // above says an exemption is deleted in the SAME commit as the fix; that did not happen here, so the
+  // register red-flagged a bug that was already gone.
+  // ⚠ PROVEN BEFORE DELETING, because "someone said it is fixed" is how a stale exemption becomes a hidden
+  // live one. Measured on main:
+  //   - the entry claimed onShowOnMap "answers with go('map') only; it never re-dispatches
+  //     doxa:select-zone". It does: upg-100-mfe.vue dispatches that event AND sets a `select-zone`
+  //     attribute first, so a pane that mounts later still reads the request.
+  //   - the cited coordinate upg-100-mfe.vue:143 is an unrelated comment about tab rendering; the handler
+  //     is at :274. A file: line in a register ages into a false claim the moment anyone edits above it.
+  //   - both fixes are ancestors of main: 12a64702 (release the retained request on success — the FIRST
+  //     press was losing the zone) and 67e9ede5 (the wall clears its memory when its pane goes inert).
+  //   - the receiving side still registers its listener.
+  //   - rega proved it end to end on BOTH engines at 810ffa26.
 }
 const MAPBOX_KNOWN = {
   // pplr-data-maps (new Experimental bundle, exp-shepherd) loads the Mapbox GEOCODER script even when