diff --git a/docs/compaction-handoff.md b/docs/compaction-handoff.md
index e180748..fcf952c 100644
--- a/docs/compaction-handoff.md
+++ b/docs/compaction-handoff.md
@@ -2,6 +2,27 @@
 
 Current date/time context: 2026-06-27, local timezone America/Chicago.
 
+## 2026-06-27 Momentum Penalty Test Installed
+
+- The game was cold, so an enabled momentum-penalty test DLL was installed to
+  the Cyberpunk RED4ext plugin directory.
+- Source flag for the installed test:
+  `kEnableGpsMomentumPenaltyInlinePatch = true`.
+- The old highway multiplier hook is still compiled in, but
+  `solver_weights.bin` was written to `vanilla` (`1.0`) so highway preference is
+  neutral for this A/B. The active behavioral change should be only the fixed
+  ordinary-edge additive penalty.
+- Active fixed penalty:
+  `kGpsMomentumFixedEdgePenalty = 8.0f`.
+- Expected log lines on launch:
+  `momentum fixed-edge penalty active value=8 sites=ordinary-expansion` plus
+  `gps-momentum-penalty-inline-patch applied site=expand-list-a` and
+  `site=expand-list-b`.
+- First test routine should be the fixed car save and usual route sequence:
+  side job, Sinnerman, Claire, custom pin. If stable, also test Violence,
+  The Gig/Cassius Rider, Aldecaldo/Badlands, and unfinished-highway
+  cyberpsycho route.
+
 ## 2026-06-27 Disabled Momentum Penalty Prototype
 
 - Static disassembly of the full async solver relaxation cluster is updated.
diff --git a/red4ext/EdgeWeightGPS/src/Main.cpp b/red4ext/EdgeWeightGPS/src/Main.cpp
index f9cd92f..c963d3c 100644
--- a/red4ext/EdgeWeightGPS/src/Main.cpp
+++ b/red4ext/EdgeWeightGPS/src/Main.cpp
@@ -103,7 +103,7 @@ constexpr bool kEnableGpsMultiplierHooks = false;
 constexpr bool kEnableGpsAuxMultiplierHook = false;
 constexpr bool kEnableGpsMultiplierSignatureTrace = false;
 constexpr bool kEnableGpsNodeMultiplierInlinePatch = true;
-constexpr bool kEnableGpsMomentumPenaltyInlinePatch = false;
+constexpr bool kEnableGpsMomentumPenaltyInlinePatch = true;
 constexpr bool kEnableGpsCostTablePatch = false;
 constexpr bool kEnableGpsProviderClassPatch = false;
 constexpr bool kEnableGpsProviderClassPatchTrace = false;