diff --git a/docs/traffic-system-debrief.md b/docs/traffic-system-debrief.md
index 06ef3b8..7dda3a9 100644
--- a/docs/traffic-system-debrief.md
+++ b/docs/traffic-system-debrief.md
@@ -138,6 +138,31 @@ one of them can resolve the mappin system, it also logs concrete vtable RVAs for
 slots `0x1f0`, `0x220`, `0x228`, `0x250`, `0x280`, `0x2e0`, `0x2f0`, `0x368`,
 and `0x3a8`, then attaches temporary hooks to the route-adjacent slots.
 
+Live result: this lead appears to be the hover/selection layer, not the route
+commit layer. In a controlled test window, hovering a world-map icon and then
+moving back to empty map space fired `SetSelectedMappinWrapper` and
+`SetSelectedMappinCore`. Pressing the route/track action on that icon did not
+fire `FrameMappinPath`, `TrackCustomPositionMappin`, `TrackMappin`, the tracked
+mappin slots, or any of the custom-position slots.
+
+That pushes the search one layer higher, into the world-map controller script
+methods around tracking an objective or setting a waypoint. Static REDscript
+strings name these relevant methods:
+
+```text
+WorldMapMenuGameController.TryTrackQuestOrSetWaypoint
+WorldMapMenuGameController.UpdateTrackedQuest
+WorldMapMenuGameController.UpdateTravelDestination
+WorldMapMenuGameController.TrackQuestMappin
+WorldMapMenuGameController.OnPressInput
+WorldMapMenuGameController.OnHoldInput
+```
+
+The current read-only REDscript probe wraps the no-argument route/tracking
+methods plus `TrackQuestMappin`. If those fire on route plotting, the next step
+is to trace their native calls or wrap the specific player-quest/custom-waypoint
+operation they delegate to.
+
 ## The High-Level Shape
 
 Cyberpunk appears to split "navigation" into at least two major domains:
diff --git a/redscript/EdgeWeightGPS/EdgeWeightGPS.reds b/redscript/EdgeWeightGPS/EdgeWeightGPS.reds
new file mode 100644
index 0000000..75256b4
--- /dev/null
+++ b/redscript/EdgeWeightGPS/EdgeWeightGPS.reds
@@ -0,0 +1,33 @@
+module EdgeWeightGPS
+
+private func EdgeWeightGPSLog(message: String) -> Void {
+  Log("[EdgeWeightGPS] " + message);
+}
+
+@wrapMethod(WorldMapMenuGameController)
+private final func TryTrackQuestOrSetWaypoint() -> Void {
+  EdgeWeightGPSLog("WorldMapMenuGameController.TryTrackQuestOrSetWaypoint enter");
+  wrappedMethod();
+  EdgeWeightGPSLog("WorldMapMenuGameController.TryTrackQuestOrSetWaypoint exit");
+}
+
+@wrapMethod(WorldMapMenuGameController)
+private final func UpdateTrackedQuest() -> Void {
+  EdgeWeightGPSLog("WorldMapMenuGameController.UpdateTrackedQuest enter");
+  wrappedMethod();
+  EdgeWeightGPSLog("WorldMapMenuGameController.UpdateTrackedQuest exit");
+}
+
+@wrapMethod(WorldMapMenuGameController)
+private final func UpdateTravelDestination() -> Void {
+  EdgeWeightGPSLog("WorldMapMenuGameController.UpdateTravelDestination enter");
+  wrappedMethod();
+  EdgeWeightGPSLog("WorldMapMenuGameController.UpdateTravelDestination exit");
+}
+
+@wrapMethod(WorldMapMenuGameController)
+private final func TrackQuestMappin(mappinController: ref<BaseMappinBaseController>) -> Void {
+  EdgeWeightGPSLog("WorldMapMenuGameController.TrackQuestMappin enter defined=" + ToString(IsDefined(mappinController)));
+  wrappedMethod(mappinController);
+  EdgeWeightGPSLog("WorldMapMenuGameController.TrackQuestMappin exit");
+}
diff --git a/tools/install_redscript_probe.sh b/tools/install_redscript_probe.sh
new file mode 100755
index 0000000..6122301
--- /dev/null
+++ b/tools/install_redscript_probe.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+game_dir="${CYBERPUNK2077_GAME_DIR:-/var/home/salt/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Cyberpunk 2077}"
+script_out="$game_dir/r6/scripts/EdgeWeightGPS"
+
+mkdir -p "$script_out"
+install -m 0644 "$repo_root/redscript/EdgeWeightGPS/EdgeWeightGPS.reds" "$script_out/EdgeWeightGPS.reds"
+
+printf 'Installed %s\n' "$script_out/EdgeWeightGPS.reds"