diff --git a/apps/web/src/components/panels/place/DataSourceSections.tsx b/apps/web/src/components/panels/place/DataSourceSections.tsx
index 73740e3f..aca6fcd2 100644
--- a/apps/web/src/components/panels/place/DataSourceSections.tsx
+++ b/apps/web/src/components/panels/place/DataSourceSections.tsx
@@ -30,7 +30,7 @@ import { TEAL } from "@/lib/theme";
 import { BrandMark } from "../shared/BrandMark";
 import { type StructuredSection, StructuredSections } from "../shared/StructuredSections";
 import { DataSourceNearbyTransit } from "./DataSourceNearbyTransit";
-import { useDataSourceI18nResolver } from "./useDataSourceI18nResolver.js";
+import { useDataSourceI18nResolver } from "./useDataSourceI18nResolver";
 
 /** Section header config per data source type. */
 const SOURCE_HEADERS: Record<string, { icon: ReactNode; titleKey: string }> = {
diff --git a/apps/web/src/components/panels/place/__tests__/useDataSourceI18nResolver.test.ts b/apps/web/src/components/panels/place/__tests__/useDataSourceI18nResolver.test.ts
index 6d699e35..4bbbb16f 100644
--- a/apps/web/src/components/panels/place/__tests__/useDataSourceI18nResolver.test.ts
+++ b/apps/web/src/components/panels/place/__tests__/useDataSourceI18nResolver.test.ts
@@ -33,7 +33,7 @@ vi.mock("@/lib/frameworkStringsContext", () => ({
     }) satisfies LocaleStrings,
 }));
 
-import { useDataSourceI18nResolver } from "../useDataSourceI18nResolver.js";
+import { useDataSourceI18nResolver } from "../useDataSourceI18nResolver";
 
 describe("useDataSourceI18nResolver", () => {
   it("resolves an integration-scoped token via the matching integration", () => {
diff --git a/packages/integration-framework/src/contracts/mobility-data-source-provider.ts b/packages/integration-framework/src/contracts/mobility-data-source-provider.ts
index 22ad0461..dfe9dee7 100644
--- a/packages/integration-framework/src/contracts/mobility-data-source-provider.ts
+++ b/packages/integration-framework/src/contracts/mobility-data-source-provider.ts
@@ -1,7 +1,7 @@
 import type { BoundingBox, LngLat, OsmFilter } from "@openmapx/core";
 import type { Attribution } from "@openmapx/mobility-core/attribution";
 import type { MobilityResult } from "@openmapx/mobility-core/result";
-import type { I18nToken, Translatable } from "../../strings/index.js";
+import type { I18nToken, Translatable } from "../../strings/index";
 
 export interface DataSourceAttribution {
   text: string;
diff --git a/packages/integration-framework/src/loader.ts b/packages/integration-framework/src/loader.ts
index 669313fb..722c2d15 100644
--- a/packages/integration-framework/src/loader.ts
+++ b/packages/integration-framework/src/loader.ts
@@ -1,4 +1,4 @@
-import type { LocaleStrings } from "../strings/index.js";
+import type { LocaleStrings } from "../strings/index";
 import type { CustomHealthCheckFn } from "./context";
 import type { IntegrationManifest } from "./manifest";
 
diff --git a/packages/integration-framework/strings/index.ts b/packages/integration-framework/strings/index.ts
index e512f6b5..0a8133b2 100644
--- a/packages/integration-framework/strings/index.ts
+++ b/packages/integration-framework/strings/index.ts
@@ -1,13 +1,13 @@
-export { type ResolveOptions, resolveToken } from "./src/resolver.js";
-export { sharedStrings, sharedT, token } from "./src/token.js";
-export type { I18nToken, LocaleCatalog, LocaleStrings, Translatable } from "./src/types.js";
+export { type ResolveOptions, resolveToken } from "./src/resolver";
+export { sharedStrings, sharedT, token } from "./src/token";
+export type { I18nToken, LocaleCatalog, LocaleStrings, Translatable } from "./src/types";
 
 /**
  * Runtime check for whether a value is an `I18nToken`. Used by the client
  * resolver to decide between translating a token and rendering a passthrough
  * `string | number` value.
  */
-export function isI18nToken(value: unknown): value is import("./src/types.js").I18nToken {
+export function isI18nToken(value: unknown): value is import("./src/types").I18nToken {
   return (
     typeof value === "object" &&
     value !== null &&
diff --git a/packages/integration-framework/strings/src/resolver.ts b/packages/integration-framework/strings/src/resolver.ts
index cd4510ff..60d96531 100644
--- a/packages/integration-framework/strings/src/resolver.ts
+++ b/packages/integration-framework/strings/src/resolver.ts
@@ -1,5 +1,5 @@
 import { IntlMessageFormat } from "intl-messageformat";
-import type { I18nToken, LocaleStrings } from "./types.js";
+import type { I18nToken, LocaleStrings } from "./types";
 
 export interface ResolveOptions {
   /** Active locale (e.g. "en", "de"). */
diff --git a/packages/integration-framework/strings/src/token.ts b/packages/integration-framework/strings/src/token.ts
index 439ec265..b02c4821 100644
--- a/packages/integration-framework/strings/src/token.ts
+++ b/packages/integration-framework/strings/src/token.ts
@@ -1,6 +1,6 @@
 import deShared from "../locales/de.json" with { type: "json" };
 import enShared from "../locales/en.json" with { type: "json" };
-import type { I18nToken, LocaleStrings } from "./types.js";
+import type { I18nToken, LocaleStrings } from "./types";
 
 /**
  * The framework's shared-vocabulary catalog. Indexed by locale code; each