diff --git a/scripts/check_core_api_signatures.py b/scripts/check_core_api_signatures.py
index d82db8b6..3a9481ab 100644
--- a/scripts/check_core_api_signatures.py
+++ b/scripts/check_core_api_signatures.py
@@ -58,9 +58,8 @@
 ``None`` with it. While any ``None`` entry exists, the test (with
 LEDMATRIX_CORE) insists HEAD reports ``UNTAGGED_SATISFIED_BY`` and no tag does.
 
-Every entry below first shipped in v3.4.0 (tagged at core 9e3f184d), so none
-is ``None`` today. ``UNTAGGED_SATISFIED_BY`` is only consulted by a ``None``
-row: before adding one, set it to the version core main reports once main is
+No entry below is ``None`` today: each names the tag that first ships it.
+``UNTAGGED_SATISFIED_BY`` is only consulted by a ``None`` row: before adding one, set it to the version core main reports once main is
 bumped past the latest tag.
 
 Limits: an API not in the table is assumed old enough (add a row when core
@@ -110,6 +109,10 @@ class ApiChange(NamedTuple):
               "3.4.0", "core #523"),
     ApiChange("set_pixels_per_frame", None, None, "src/common/scroll_helper.py",
               "3.4.0", "core scroll_helper"),
+    ApiChange("request_on_demand", None, None, "src/plugin_system/base_plugin.py",
+              "3.8.1", "core #768"),
+    ApiChange("end_on_demand", None, None, "src/plugin_system/base_plugin.py",
+              "3.8.1", "core #768"),
 )
 
 #: Floor that satisfies a ``None`` (untagged) entry; none exist today. See
diff --git a/scripts/test_check_core_api_signatures.py b/scripts/test_check_core_api_signatures.py
index 4f17f460..eacc943d 100644
--- a/scripts/test_check_core_api_signatures.py
+++ b/scripts/test_check_core_api_signatures.py
@@ -202,7 +202,7 @@ def method(body, indent="        "):
 print("\ntable vs core")
 
 core = os.environ.get("LEDMATRIX_CORE", "")
-TAGS = ["3.0.0", "3.1.0", "3.2.0", "3.3.0", "3.3.1", "3.4.0"]
+TAGS = ["3.0.0", "3.1.0", "3.2.0", "3.3.0", "3.3.1", "3.4.0", "3.5.0", "3.6.0", "3.6.1", "3.6.2", "3.7.0", "3.8.0", "3.8.1"]
 
 
 def show(ref, path):