diff --git a/src/index.ts b/src/index.ts
index 6015586..672b7b5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,6 +3,7 @@ export { Task } from './task.ts';
 export { workerPool } from './worker-pool.ts';
 export { transfer } from './transfer.ts';
 export type { Runner } from './runner.ts';
+export type { Loadable } from './shared/index.ts';
 export {
   AtomicBool,
   AtomicInt8,
@@ -19,4 +20,4 @@ export {
   ReadGuard,
   WriteGuard,
   slab,
-} from './sync/index.ts';
+} from './shared/index.ts';
diff --git a/src/shared/index.ts b/src/shared/index.ts
index aa721ef..8ecf09f 100644
--- a/src/shared/index.ts
+++ b/src/shared/index.ts
@@ -1,3 +1,4 @@
+export type { Loadable } from './loadable.ts';
 export { AtomicBool } from './atomic-bool.ts';
 export { AtomicInt8 } from './atomic-int8.ts';
 export { AtomicUint8 } from './atomic-uint8.ts';
diff --git a/src/shared/loadable.ts b/src/shared/loadable.ts
new file mode 100644
index 0000000..fc4cf8f
--- /dev/null
+++ b/src/shared/loadable.ts
@@ -0,0 +1,4 @@
+export interface Loadable<T> {
+  load(): T;
+  store(value: T): void;
+}