diff --git a/runtime/include/mod_plugins.h b/runtime/include/mod_plugins.h
index a4af918e..78515797 100644
--- a/runtime/include/mod_plugins.h
+++ b/runtime/include/mod_plugins.h
@@ -390,6 +390,9 @@ int psx_mod_register_option_changed_plugin(const char* id,
                                            PSXModOptionChangedCallback callback);
 int psx_mod_set_option_live(const char* package_id, const char* feature_id,
                             const char* option_id, const char* value);
+/* 1 when the committed feature's plugin registered an option-changed callback
+ * (so a live set can take effect now). Read-only; any thread. */
+int psx_mod_option_live_capable(const char* package_id, const char* feature_id);
 /*
  * Read the committed owner-selected path for a resource declared by the
  * package feature whose trusted plugin is currently running. Returns 0 when
diff --git a/runtime/src/mod_runtime.cpp b/runtime/src/mod_runtime.cpp
index f1b78fbe..9f4d3bc7 100644
--- a/runtime/src/mod_runtime.cpp
+++ b/runtime/src/mod_runtime.cpp
@@ -2846,6 +2846,18 @@ extern "C" int psx_mod_register_option_changed_plugin(const char* id,
     return 1;
 }
 
+extern "C" int psx_mod_option_live_capable(const char* package_id, const char* feature_id) {
+    using namespace PSXRecompV4;
+    if (!package_id || !feature_id) return 0;
+    RuntimeMods& s = state();
+    if (!s.initialized || !s.plan.ok) return 0;
+    for (const ModResolution::Plugin& plugin : s.plan.plugins)
+        if (plugin.package_id == package_id && plugin.feature_id == feature_id &&
+            option_changed_plugins().count(plugin.id))
+            return 1;
+    return 0;
+}
+
 extern "C" int psx_mod_set_option_live(const char* package_id, const char* feature_id,
                                        const char* option_id, const char* value) {
     using namespace PSXRecompV4;
diff --git a/runtime/tests/test_mod_runtime.cpp b/runtime/tests/test_mod_runtime.cpp
index e796afc4..d9dc46bb 100644
--- a/runtime/tests/test_mod_runtime.cpp
+++ b/runtime/tests/test_mod_runtime.cpp
@@ -1101,8 +1101,12 @@ int main(int argc, char** argv) {
         check(psx_mod_option_value("runtime.ram", "big-ram", "size", value, sizeof(value)) == 1 &&
                   std::string(value) == "four",
               "a live override must answer later reads");
+        check(!psx_mod_option_live_capable("runtime.ram", "big-ram"),
+              "no callback yet: not live-capable");
         check(psx_mod_register_option_changed_plugin("runtime.big-ram", test_option_changed),
               "option-changed hook must register");
+        check(psx_mod_option_live_capable("runtime.ram", "big-ram"),
+              "a registered callback makes the feature live-capable");
         check(psx_mod_set_option_live("runtime.ram", "big-ram", "size", "eight") == 1 &&
                   option_changed_hits == 1 && option_changed_value == "eight",
               "the plugin must see the change in its own context");