diff --git a/packages/netlify-cms-lib-util/src/API.ts b/packages/netlify-cms-lib-util/src/API.ts
index 4c4e83be..cac92155 100644
--- a/packages/netlify-cms-lib-util/src/API.ts
+++ b/packages/netlify-cms-lib-util/src/API.ts
@@ -1,31 +1,6 @@
 import { asyncLock, AsyncLock } from './asyncLock';
 import unsentRequest from './unsentRequest';
 
-export const CMS_BRANCH_PREFIX = 'cms';
-export const DEFAULT_PR_BODY = 'Automatically generated by Netlify CMS';
-export const MERGE_COMMIT_MESSAGE = 'Automatically generated. Merged on Netlify CMS.';
-
-const NETLIFY_CMS_LABEL_PREFIX = 'netlify-cms/';
-export const isCMSLabel = (label: string) => label.startsWith(NETLIFY_CMS_LABEL_PREFIX);
-export const labelToStatus = (label: string) => label.substr(NETLIFY_CMS_LABEL_PREFIX.length);
-export const statusToLabel = (status: string) => `${NETLIFY_CMS_LABEL_PREFIX}${status}`;
-
-export const generateContentKey = (collectionName: string, slug: string) =>
-  `${collectionName}/${slug}`;
-
-export const parseContentKey = (contentKey: string) => {
-  const index = contentKey.indexOf('/');
-  return { collection: contentKey.substr(0, index), slug: contentKey.substr(index + 1) };
-};
-
-export const contentKeyFromBranch = (branch: string) => {
-  return branch.substring(`${CMS_BRANCH_PREFIX}/`.length);
-};
-
-export const branchFromContentKey = (contentKey: string) => {
-  return `${CMS_BRANCH_PREFIX}/${contentKey}`;
-};
-
 export interface FetchError extends Error {
   status: number;
 }
diff --git a/packages/netlify-cms-lib-util/src/APIUtils.ts b/packages/netlify-cms-lib-util/src/APIUtils.ts
new file mode 100644
index 00000000..d959ea91
--- /dev/null
+++ b/packages/netlify-cms-lib-util/src/APIUtils.ts
@@ -0,0 +1,24 @@
+export const CMS_BRANCH_PREFIX = 'cms';
+export const DEFAULT_PR_BODY = 'Automatically generated by Netlify CMS';
+export const MERGE_COMMIT_MESSAGE = 'Automatically generated. Merged on Netlify CMS.';
+
+const NETLIFY_CMS_LABEL_PREFIX = 'netlify-cms/';
+export const isCMSLabel = (label: string) => label.startsWith(NETLIFY_CMS_LABEL_PREFIX);
+export const labelToStatus = (label: string) => label.substr(NETLIFY_CMS_LABEL_PREFIX.length);
+export const statusToLabel = (status: string) => `${NETLIFY_CMS_LABEL_PREFIX}${status}`;
+
+export const generateContentKey = (collectionName: string, slug: string) =>
+  `${collectionName}/${slug}`;
+
+export const parseContentKey = (contentKey: string) => {
+  const index = contentKey.indexOf('/');
+  return { collection: contentKey.substr(0, index), slug: contentKey.substr(index + 1) };
+};
+
+export const contentKeyFromBranch = (branch: string) => {
+  return branch.substring(`${CMS_BRANCH_PREFIX}/`.length);
+};
+
+export const branchFromContentKey = (contentKey: string) => {
+  return `${CMS_BRANCH_PREFIX}/${contentKey}`;
+};
diff --git a/packages/netlify-cms-lib-util/src/__tests__/api.spec.js b/packages/netlify-cms-lib-util/src/__tests__/api.spec.js
index a4a86213..675ff045 100644
--- a/packages/netlify-cms-lib-util/src/__tests__/api.spec.js
+++ b/packages/netlify-cms-lib-util/src/__tests__/api.spec.js
@@ -1,58 +1,5 @@
 import * as api from '../API';
 describe('Api', () => {
-  describe('generateContentKey', () => {
-    it('should generate content key', () => {
-      expect(api.generateContentKey('posts', 'dir1/dir2/post-title')).toBe(
-        'posts/dir1/dir2/post-title',
-      );
-    });
-  });
-
-  describe('parseContentKey', () => {
-    it('should parse content key', () => {
-      expect(api.parseContentKey('posts/dir1/dir2/post-title')).toEqual({
-        collection: 'posts',
-        slug: 'dir1/dir2/post-title',
-      });
-    });
-  });
-
-  describe('isCMSLabel', () => {
-    it('should return true for CMS label', () => {
-      expect(api.isCMSLabel('netlify-cms/draft')).toBe(true);
-    });
-
-    it('should return false for non CMS label', () => {
-      expect(api.isCMSLabel('other/label')).toBe(false);
-    });
-  });
-
-  describe('labelToStatus', () => {
-    it('should get status from label', () => {
-      expect(api.labelToStatus('netlify-cms/draft')).toBe('draft');
-    });
-  });
-
-  describe('statusToLabel', () => {
-    it('should generate label from status', () => {
-      expect(api.statusToLabel('draft')).toBe('netlify-cms/draft');
-    });
-  });
-
-  describe('isPreviewContext', () => {
-    it('should return true for default preview context', () => {
-      expect(api.isPreviewContext('deploy', '')).toBe(true);
-    });
-
-    it('should return false for non default preview context', () => {
-      expect(api.isPreviewContext('other', '')).toBe(false);
-    });
-
-    it('should return true for custom preview context', () => {
-      expect(api.isPreviewContext('ci/custom_preview', 'ci/custom_preview')).toBe(true);
-    });
-  });
-
   describe('getPreviewStatus', () => {
     it('should return preview status on matching context', () => {
       expect(api.getPreviewStatus([{ context: 'deploy' }])).toEqual({ context: 'deploy' });
diff --git a/packages/netlify-cms-lib-util/src/__tests__/apiUtils.spec.js b/packages/netlify-cms-lib-util/src/__tests__/apiUtils.spec.js
new file mode 100644
index 00000000..b565c916
--- /dev/null
+++ b/packages/netlify-cms-lib-util/src/__tests__/apiUtils.spec.js
@@ -0,0 +1,41 @@
+import * as apiUtils from '../APIUtils';
+describe('APIUtils', () => {
+  describe('generateContentKey', () => {
+    it('should generate content key', () => {
+      expect(apiUtils.generateContentKey('posts', 'dir1/dir2/post-title')).toBe(
+        'posts/dir1/dir2/post-title',
+      );
+    });
+  });
+
+  describe('parseContentKey', () => {
+    it('should parse content key', () => {
+      expect(apiUtils.parseContentKey('posts/dir1/dir2/post-title')).toEqual({
+        collection: 'posts',
+        slug: 'dir1/dir2/post-title',
+      });
+    });
+  });
+
+  describe('isCMSLabel', () => {
+    it('should return true for CMS label', () => {
+      expect(apiUtils.isCMSLabel('netlify-cms/draft')).toBe(true);
+    });
+
+    it('should return false for non CMS label', () => {
+      expect(apiUtils.isCMSLabel('other/label')).toBe(false);
+    });
+  });
+
+  describe('labelToStatus', () => {
+    it('should get status from label', () => {
+      expect(apiUtils.labelToStatus('netlify-cms/draft')).toBe('draft');
+    });
+  });
+
+  describe('statusToLabel', () => {
+    it('should generate label from status', () => {
+      expect(apiUtils.statusToLabel('draft')).toBe('netlify-cms/draft');
+    });
+  });
+});
diff --git a/packages/netlify-cms-lib-util/src/index.ts b/packages/netlify-cms-lib-util/src/index.ts
index a14b88f4..62ae191d 100644
--- a/packages/netlify-cms-lib-util/src/index.ts
+++ b/packages/netlify-cms-lib-util/src/index.ts
@@ -42,6 +42,14 @@ import {
 import {
   readFile,
   readFileMetadata,
+  isPreviewContext,
+  getPreviewStatus,
+  PreviewState,
+  FetchError as FE,
+  ApiRequest as AR,
+  requestWithBackoff,
+} from './API';
+import {
   CMS_BRANCH_PREFIX,
   generateContentKey,
   isCMSLabel,
@@ -49,16 +57,10 @@ import {
   statusToLabel,
   DEFAULT_PR_BODY,
   MERGE_COMMIT_MESSAGE,
-  isPreviewContext,
-  getPreviewStatus,
-  PreviewState,
-  FetchError as FE,
   parseContentKey,
   branchFromContentKey,
   contentKeyFromBranch,
-  ApiRequest as AR,
-  requestWithBackoff,
-} from './API';
+} from './APIUtils';
 import {
   createPointerFile,
   getLargeMediaFilteredMediaFiles,
diff --git a/packages/netlify-cms-proxy-server/src/middlewares/localGit/index.ts b/packages/netlify-cms-proxy-server/src/middlewares/localGit/index.ts
index ee73c155..9752650e 100644
--- a/packages/netlify-cms-proxy-server/src/middlewares/localGit/index.ts
+++ b/packages/netlify-cms-proxy-server/src/middlewares/localGit/index.ts
@@ -9,7 +9,7 @@ import {
   CMS_BRANCH_PREFIX,
   statusToLabel,
   labelToStatus,
-} from 'netlify-cms-lib-util/src/API';
+} from 'netlify-cms-lib-util/src/APIUtils';
 
 import { defaultSchema, joi } from '../joi';
 import {
diff --git a/packages/netlify-cms-proxy-server/src/semaphore.d.ts b/packages/netlify-cms-proxy-server/src/semaphore.d.ts
deleted file mode 100644
index 8c09e2a0..00000000
--- a/packages/netlify-cms-proxy-server/src/semaphore.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare module 'semaphore' {
-  export type Semaphore = { take: (f: Function) => void; leave: () => void };
-  const semaphore: (count: number) => Semaphore;
-  export default semaphore;
-}