diff --git a/.github/workflows/commit-validation.yml b/.github/workflows/commit-validation.yml
index e830e5a9..98fe751a 100644
--- a/.github/workflows/commit-validation.yml
+++ b/.github/workflows/commit-validation.yml
@@ -13,8 +13,9 @@ permissions:
 
 env:
   # Keep the engine's shared File/FileSystem ABI locked to the companion
-  # revision that implements GAME_API 45 and generated-animation cache v3.
-  OPENQ4_GAMELIBS_SHA: 09fa7e175efa5a5d819569ba577fd0e11c38a891
+  # revision that implements GAME_API 46, generated-animation cache v3, and
+  # the game-owned transient time-scale interface.
+  OPENQ4_GAMELIBS_SHA: 9215976fa43353e4c22b617a175ad06b7547ddae
 
 jobs:
   script-smoke:
diff --git a/.github/workflows/push-verification.yml b/.github/workflows/push-verification.yml
index ca04127c..5f5645dd 100644
--- a/.github/workflows/push-verification.yml
+++ b/.github/workflows/push-verification.yml
@@ -9,8 +9,9 @@ permissions:
 
 env:
   # Keep the engine's shared File/FileSystem ABI locked to the companion
-  # revision that implements GAME_API 45 and generated-animation cache v3.
-  OPENQ4_GAMELIBS_SHA: 09fa7e175efa5a5d819569ba577fd0e11c38a891
+  # revision that implements GAME_API 46, generated-animation cache v3, and
+  # the game-owned transient time-scale interface.
+  OPENQ4_GAMELIBS_SHA: 9215976fa43353e4c22b617a175ad06b7547ddae
 
 concurrency:
   group: openq4-push-verification-${{ github.ref }}
diff --git a/tools/tests/arena_campaign.py b/tools/tests/arena_campaign.py
index 2dea7c74..12400f3f 100644
--- a/tools/tests/arena_campaign.py
+++ b/tools/tests/arena_campaign.py
@@ -1075,7 +1075,8 @@ def validate_engine_hooks() -> None:
     )
 
     smooth_slow_time = function_body(
-        common, "static bool openQ4_ShouldUseSmoothSingleplayerSlowTime( void )"
+        common,
+        "static bool openQ4_ShouldUseSmoothSingleplayerSlowTime( float effectiveTimeScale )",
     )
     require(
         common,
@@ -1087,6 +1088,11 @@ def validate_engine_hooks() -> None:
         "openQ4_singleplayerGameModuleReady.load( std::memory_order_acquire )",
         "Arena-safe async module transition",
     )
+    require(
+        smooth_slow_time,
+        "return effectiveTimeScale < 0.999f;",
+        "Composed single-player slow-time detection",
+    )
     if (
         "cvarSystem->" in smooth_slow_time
         or "GetCVarString" in smooth_slow_time
diff --git a/tools/tests/game_type_module_selection.py b/tools/tests/game_type_module_selection.py
index 1f01a7af..aee7454f 100644
--- a/tools/tests/game_type_module_selection.py
+++ b/tools/tests/game_type_module_selection.py
@@ -664,7 +664,7 @@ def validate_two_phase_game_api_contract() -> None:
         return
 
     game_api = read(game_api_path)
-    require(game_api, "const int GAME_API_VERSION\t\t= 45;", "current game API version")
+    require(game_api, "const int GAME_API_VERSION\t\t= 46;", "current game API version")
     require(
         game_api,
         "virtual void\t\t\t\tShutdownAfterDecls( void ) = 0;",
@@ -831,7 +831,9 @@ def validate_swap_guard() -> None:
 def validate_async_module_state() -> None:
     common = read(ROOT / "src" / "framework" / "Common.cpp")
     validate_shutdown_lifecycle_contract(common)
-    helper_start = common.index("static bool openQ4_ShouldUseSmoothSingleplayerSlowTime( void ) {")
+    helper_start = common.index(
+        "static bool openQ4_ShouldUseSmoothSingleplayerSlowTime( float effectiveTimeScale ) {"
+    )
     helper_end = common.index("\n}\n", helper_start)
     helper = common[helper_start:helper_end]
 
@@ -850,6 +852,11 @@ def validate_async_module_state() -> None:
         "openQ4_singleplayerGameModuleReady.load( std::memory_order_acquire )",
         "async-safe game module state",
     )
+    require(
+        helper,
+        "return effectiveTimeScale < 0.999f;",
+        "composed single-player slow-time detection",
+    )
 
     load_start = common.index("void idCommonLocal::LoadGameDLL( void ) {")
     unload_start = common.index("void idCommonLocal::UnloadGameDLL( void ) {", load_start)
diff --git a/tools/tests/level_load_cache.py b/tools/tests/level_load_cache.py
index 0887391b..5bda15b9 100644
--- a/tools/tests/level_load_cache.py
+++ b/tools/tests/level_load_cache.py
@@ -53,7 +53,7 @@ def validate_abi_contract() -> None:
     )
     require(
         read(GAME_ROOT, "src/game/Game.h"),
-        "GAME_API_VERSION\t\t= 45",
+        "GAME_API_VERSION\t\t= 46",
         "game module ABI",
     )
 
diff --git a/tools/tests/mvd_server_api_contract.py b/tools/tests/mvd_server_api_contract.py
index 36795881..4d365c39 100644
--- a/tools/tests/mvd_server_api_contract.py
+++ b/tools/tests/mvd_server_api_contract.py
@@ -93,7 +93,7 @@ def main() -> None:
         "// 42: durable server MVD publication results for competitive match evidence",
         "append-only MVD result ABI history",
     )
-    require(game_api_h, "GAME_API_VERSION\t\t= 45", "current game-module ABI version")
+    require(game_api_h, "GAME_API_VERSION\t\t= 46", "current game-module ABI version")
 
     forwarding = (
         "multiViewDemo.StartNamedRecording( name )",
diff --git a/tools/tests/network_ipv4_support.py b/tools/tests/network_ipv4_support.py
index 05ad99bc..5a3d699a 100644
--- a/tools/tests/network_ipv4_support.py
+++ b/tools/tests/network_ipv4_support.py
@@ -311,7 +311,7 @@ def validate_idport_platform_data_mirror() -> None:
     if game_api.is_file():
         require(
             game_api.read_text(encoding="utf-8", errors="strict"),
-            "const int GAME_API_VERSION\t\t= 45;",
+            "const int GAME_API_VERSION\t\t= 46;",
             "idPort-layout game API revision",
         )
 
diff --git a/tools/tests/renderer_temporal_presentation.py b/tools/tests/renderer_temporal_presentation.py
index 94a410f0..abd2093e 100644
--- a/tools/tests/renderer_temporal_presentation.py
+++ b/tools/tests/renderer_temporal_presentation.py
@@ -65,7 +65,7 @@ def main() -> int:
     )
     require(
         read(GAME_ROOT / "src" / "game" / "Game.h"),
-        "const int GAME_API_VERSION\t\t= 45;",
+        "const int GAME_API_VERSION\t\t= 46;",
         "game ABI v45",
     )
 
diff --git a/tools/tests/weapon_wheel_time_scale.py b/tools/tests/weapon_wheel_time_scale.py
index ff25f14e..d1ffb4b2 100644
--- a/tools/tests/weapon_wheel_time_scale.py
+++ b/tools/tests/weapon_wheel_time_scale.py
@@ -88,7 +88,7 @@ def main() -> None:
     require(run_frame, "cvarSystem->GetCVarFloat( \"timescale\" ) * common->GetGameTimeScale()", "SP simulation scale")
 
     game_api = read(GAME_ROOT / "src/game/Game.h")
-    require(game_api, "const int GAME_API_VERSION\t\t= 44;", "updated engine/GameLib ABI")
+    require(game_api, "const int GAME_API_VERSION\t\t= 46;", "updated engine/GameLib ABI")
 
     print("single-player time-scale and walking CVar checks passed")