diff --git a/tools/workflow-engine/codeberg-world.ts b/tools/workflow-engine/codeberg-world.ts
index ab095bc52c..fc76a68023 100644
--- a/tools/workflow-engine/codeberg-world.ts
+++ b/tools/workflow-engine/codeberg-world.ts
@@ -13,9 +13,6 @@
 // substrate (community governance + EU-data-sovereignty). Substrate-naming
 // substrate-engineering keeps the inheritance explicit.
 
-import {
-  type LifetimeState,
-} from "./world.js";
 import {
   buildGiteaWorld,
   type GiteaPrLifetime,
@@ -29,13 +26,22 @@ import { type GitWorld } from "./git-world.js";
 /**
  * CodebergWorld — Codeberg-specific specialization of GiteaWorld.
  *
- * Inherits all GiteaWorld substrate + adds Codeberg-specific properties:
- * - Community-moderation substrate (codeOfConduct, terms-of-service)
- * - EU-data-sovereignty marker (GDPR-compliant; German non-profit)
- * - Conservative rate-limit defaults (shared community instance)
+ * Inherits all GiteaWorld substrate fields EXCEPT forgeSpecialization,
+ * which is narrowed from "gitea" to "codeberg" literal. Uses Omit to
+ * avoid TS2430 interface-incompatible-extends error (literal types are
+ * invariant).
+ *
+ * Adds Codeberg-specific properties:
+ * - `hostingPolicy: "non-commercial-eu-sovereign"` — EU-data-sovereignty
+ *   marker (GDPR-compliant; German non-profit; Codeberg e.V.)
+ * - `communityGoverned: true` — community-moderation substrate (CoC +
+ *   community-governed terms-of-service; not commercial vendor policy)
+ *
+ * Conservative rate-limit defaults appropriate for a shared community
+ * instance are inherited via GiteaResourceBudget (constructed by
+ * buildCodebergWorld below).
  */
-export interface CodebergWorld extends GiteaWorld {
-  readonly forgeName: "git";
+export interface CodebergWorld extends Omit<GiteaWorld, "forgeSpecialization"> {
   readonly forgeSpecialization: "codeberg";  // narrower than gitea
   readonly hostingPolicy: "non-commercial-eu-sovereign";
   readonly communityGoverned: true;