diff --git a/packages/fabric/core/src/index.ts b/packages/fabric/core/src/index.ts
index b17c448..8baf34e 100644
--- a/packages/fabric/core/src/index.ts
+++ b/packages/fabric/core/src/index.ts
@@ -5,4 +5,5 @@ export * from "./result/index.js";
 export * from "./run/index.js";
 export * from "./time/index.js";
 export * from "./types/index.js";
+export * from "./utils/index.js";
 export * from "./variant/index.js";
diff --git a/packages/fabric/core/src/utils/ensure-value.ts b/packages/fabric/core/src/utils/ensure-value.ts
new file mode 100644
index 0000000..11bb5e8
--- /dev/null
+++ b/packages/fabric/core/src/utils/ensure-value.ts
@@ -0,0 +1,8 @@
+import { UnexpectedError } from "../error/unexpected-error.js";
+
+export function ensureValue<T>(value?: T): T {
+  if (!value) {
+    throw new UnexpectedError("Value is undefined");
+  }
+  return value;
+}
diff --git a/packages/fabric/core/src/utils/index.ts b/packages/fabric/core/src/utils/index.ts
new file mode 100644
index 0000000..2a01b7e
--- /dev/null
+++ b/packages/fabric/core/src/utils/index.ts
@@ -0,0 +1 @@
+export * from "./ensure-value.js";