diff --git a/src/plugins/runtime.ts b/src/plugins/runtime.ts
new file mode 100644
index 000000000..f814a0811
--- /dev/null
+++ b/src/plugins/runtime.ts
@@ -0,0 +1,17 @@
+import type { PluginRegistry } from "./registry.js";
+
+let activeRegistry: PluginRegistry | null = null;
+let activeRegistryKey: string | null = null;
+
+export function setActivePluginRegistry(registry: PluginRegistry, cacheKey?: string) {
+  activeRegistry = registry;
+  activeRegistryKey = cacheKey ?? null;
+}
+
+export function getActivePluginRegistry(): PluginRegistry | null {
+  return activeRegistry;
+}
+
+export function getActivePluginRegistryKey(): string | null {
+  return activeRegistryKey;
+}