diff --git a/packages/fabric/domain/types/email.ts b/packages/fabric/core/types/email.ts
similarity index 100%
rename from packages/fabric/domain/types/email.ts
rename to packages/fabric/core/types/email.ts
diff --git a/packages/fabric/core/types/index.ts b/packages/fabric/core/types/index.ts
index ea1cb5f..6282cfe 100644
--- a/packages/fabric/core/types/index.ts
+++ b/packages/fabric/core/types/index.ts
@@ -1,6 +1,9 @@
+export * from "./email.ts";
 export * from "./enum.ts";
 export * from "./fn.ts";
 export * from "./keyof.ts";
 export * from "./maybe-promise.ts";
 export * from "./optional.ts";
 export * from "./record.ts";
+export * from "./semver.ts";
+export * from "./uuid.ts";
diff --git a/packages/fabric/domain/types/semver.ts b/packages/fabric/core/types/semver.ts
similarity index 100%
rename from packages/fabric/domain/types/semver.ts
rename to packages/fabric/core/types/semver.ts
diff --git a/packages/fabric/domain/types/uuid.ts b/packages/fabric/core/types/uuid.ts
similarity index 100%
rename from packages/fabric/domain/types/uuid.ts
rename to packages/fabric/core/types/uuid.ts
diff --git a/packages/fabric/domain/types/base-64.ts b/packages/fabric/domain/types/base-64.ts
deleted file mode 100644
index 7b092e3..0000000
--- a/packages/fabric/domain/types/base-64.ts
+++ /dev/null
@@ -1 +0,0 @@
-export type Base64String = string;
diff --git a/packages/fabric/domain/types/entity.ts b/packages/fabric/domain/types/entity.ts
deleted file mode 100644
index bd002cd..0000000
--- a/packages/fabric/domain/types/entity.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import type { UUID } from "./uuid.ts";
-
-/**
- * An entity is a domain object that is defined by its identity.
- *
- * Entities have a unique identity (`id`), which distinguishes
- * them from other entities.
- */
-export interface Entity {
-  id: UUID;
-}
diff --git a/packages/fabric/domain/types/index.ts b/packages/fabric/domain/types/index.ts
deleted file mode 100644
index 92ad57a..0000000
--- a/packages/fabric/domain/types/index.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-export * from "./base-64.ts";
-export * from "./email.ts";
-export * from "./entity.ts";
-export * from "./semver.ts";
-export * from "./uuid.ts";