diff --git a/Composer/packages/client/src/components/ProjectTree/ProjectTree.tsx b/Composer/packages/client/src/components/ProjectTree/ProjectTree.tsx
index 379b7fbfec..01db61ee6a 100644
--- a/Composer/packages/client/src/components/ProjectTree/ProjectTree.tsx
+++ b/Composer/packages/client/src/components/ProjectTree/ProjectTree.tsx
@@ -23,6 +23,7 @@ import {
 } from '../../recoilModel';
 import { getFriendlyName } from '../../utils/dialogUtil';
 import { triggerNotSupported } from '../../utils/dialogValidator';
+import { useFeatureFlag } from '../../utils/hooks';
 
 import { TreeItem } from './treeItem';
 import { ExpandableNode } from './ExpandableNode';
@@ -133,6 +134,7 @@ export const ProjectTree: React.FC<Props> = ({
   const { onboardingAddCoachMarkRef, selectTo, navTo, navigateToFormDialogSchema } = useRecoilValue(dispatcherState);
 
   const [filter, setFilter] = useState('');
+  const formDialogComposerFeatureEnabled = useFeatureFlag('FORM_DIALOG');
   const [selectedLink, setSelectedLink] = useState<TreeLink | undefined>();
   const delayedSetFilter = debounce((newValue) => setFilter(newValue), 1000);
   const addMainDialogRef = useCallback((mainDialog) => onboardingAddCoachMarkRef({ mainDialog }), []);
@@ -164,7 +166,7 @@ export const ProjectTree: React.FC<Props> = ({
   };
 
   const dialogIsFormDialog = (dialog: DialogInfo) => {
-    return process.env.COMPOSER_ENABLE_FORMS && dialog.content?.schema !== undefined;
+    return formDialogComposerFeatureEnabled && dialog.content?.schema !== undefined;
   };
 
   const formDialogSchemaExists = (projectId: string, dialog: DialogInfo) => {
diff --git a/Composer/packages/client/src/recoilModel/selectors/__test__/dialogImports.test.tsx b/Composer/packages/client/src/recoilModel/selectors/__test__/dialogImports.test.tsx
new file mode 100644
index 0000000000..49828edb18
--- /dev/null
+++ b/Composer/packages/client/src/recoilModel/selectors/__test__/dialogImports.test.tsx
@@ -0,0 +1,62 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import { getBaseName } from '../../../utils/fileUtil';
+import { getLanguageFileImports } from '../dialogImports';
+
+const files = [
+  {
+    id: 'name1.lg',
+    content: '[name2.lg](../files/name2.lg)\n[name3.lg](../files/name3.lg)\n',
+  },
+  {
+    id: 'id.lg',
+    content: '',
+  },
+  {
+    id: 'gender.lg',
+    content: '',
+  },
+  {
+    id: 'name2.lg',
+    content: '[name4.lg](../files/name4.lg)\n[name5-entity.lg](../files/name5-entity.lg)\n',
+  },
+  {
+    id: 'name3.lg',
+    content: '- Enter a value for name3',
+  },
+  {
+    id: 'name4.lg',
+    content: '[name5-entity.lg](../files/name5-entity.lg)',
+  },
+  {
+    id: 'name5-entity.lg',
+    content: '- Enter a value for name5',
+  },
+];
+
+describe('dialogImports selectors', () => {
+  it('should follow all imports and list all unique imports', () => {
+    const getFile = (id) => files.find((f) => getBaseName(f.id) === id) as { id: string; content: string };
+
+    const fileImports = getLanguageFileImports('name1', getFile);
+    expect(fileImports).toEqual([
+      {
+        id: 'name2.lg',
+        content: '[name4.lg](../files/name4.lg)\n[name5-entity.lg](../files/name5-entity.lg)\n',
+      },
+      {
+        id: 'name3.lg',
+        content: '- Enter a value for name3',
+      },
+      {
+        id: 'name4.lg',
+        content: '[name5-entity.lg](../files/name5-entity.lg)',
+      },
+      {
+        id: 'name5-entity.lg',
+        content: '- Enter a value for name5',
+      },
+    ]);
+  });
+});
diff --git a/Composer/packages/client/src/recoilModel/selectors/dialogImports.ts b/Composer/packages/client/src/recoilModel/selectors/dialogImports.ts
new file mode 100644
index 0000000000..229c4ca702
--- /dev/null
+++ b/Composer/packages/client/src/recoilModel/selectors/dialogImports.ts
@@ -0,0 +1,83 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import { LanguageFileImport, LgFile, LuFile } from '@bfc/shared';
+import uniqBy from 'lodash/uniqBy';
+import { selectorFamily } from 'recoil';
+
+import { getBaseName } from '../../utils/fileUtil';
+import { localeState, lgFilesState, luFilesState } from '../atoms';
+
+// eslint-disable-next-line security/detect-unsafe-regex
+const importRegex = /\[(?<id>.*?)]\((?<importPath>.*?)(?="|\))(?<optionalpart>".*")?\)/g;
+
+const getImportsHelper = (content: string): LanguageFileImport[] => {
+  const lines = content.split(/\r?\n/g).filter((l) => !!l) ?? [];
+
+  return (lines
+    .map((l) => {
+      importRegex.lastIndex = 0;
+      return importRegex.exec(l) as RegExpExecArray;
+    })
+    .filter(Boolean) as RegExpExecArray[]).map((regExecArr) => ({
+    id: getBaseName(regExecArr.groups?.id ?? ''),
+    importPath: regExecArr.groups?.importPath ?? '',
+  }));
+};
+
+// Finds all the file imports starting from a given dialog file.
+export const getLanguageFileImports = <T extends { id: string; content: string }>(
+  rootDialogId: string,
+  getFile: (fileId: string) => T
+): T[] => {
+  const imports: LanguageFileImport[] = [];
+
+  const visitedIds: string[] = [];
+  const fileIds = [rootDialogId];
+
+  while (fileIds.length) {
+    const currentId = fileIds.pop() as string;
+    // If this file is already visited, then continue.
+    if (visitedIds.includes(currentId)) {
+      continue;
+    }
+    const file = getFile(currentId);
+    // If file is not found or file content is empty, then continue.
+    if (!file || !file.content) {
+      continue;
+    }
+    const currentImports = getImportsHelper(file.content);
+    visitedIds.push(currentId);
+    imports.push(...currentImports);
+    const newIds = currentImports.map((ci) => getBaseName(ci.id));
+    fileIds.push(...newIds);
+  }
+
+  return uniqBy(imports, 'id').map((impExpr) => getFile(impExpr.id));
+};
+
+// Returns all the lg files referenced by a dialog file and its referenced lg files.
+export const lgImportsSelectorFamily = selectorFamily<LgFile[], { projectId: string; dialogId: string }>({
+  key: 'lgImports',
+  get: ({ projectId, dialogId }) => ({ get }) => {
+    const locale = get(localeState(projectId));
+
+    const getFile = (fileId: string) =>
+      get(lgFilesState(projectId)).find((f) => f.id === fileId || f.id === `${fileId}.${locale}`) as LgFile;
+
+    return getLanguageFileImports(dialogId, getFile);
+  },
+});
+
+// Returns all the lu files referenced by a dialog file and its referenced lu files.
+export const luImportsSelectorFamily = selectorFamily<LuFile[], { projectId: string; dialogId: string }>({
+  key: 'luImports',
+  get: ({ projectId, dialogId }) => ({ get }) => {
+    const locale = get(localeState(projectId));
+
+    const getFile = (fileId: string) =>
+      get(luFilesState(projectId)).find((f) => f.id === fileId || f.id === `${fileId}.${locale}`) as LuFile;
+
+    return getLanguageFileImports(dialogId, getFile);
+  },
+});
diff --git a/Composer/packages/client/src/recoilModel/selectors/index.ts b/Composer/packages/client/src/recoilModel/selectors/index.ts
index c6cdd3fa4f..062b4fdbe0 100644
--- a/Composer/packages/client/src/recoilModel/selectors/index.ts
+++ b/Composer/packages/client/src/recoilModel/selectors/index.ts
@@ -6,4 +6,5 @@ export * from './eject';
 export * from './extensions';
 export * from './validatedDialogs';
 export * from './dialogs';
+export * from './dialogImports';
 export * from './projectTemplates';
diff --git a/Composer/packages/types/src/indexers.ts b/Composer/packages/types/src/indexers.ts
index 5596092ed5..eb953303b9 100644
--- a/Composer/packages/types/src/indexers.ts
+++ b/Composer/packages/types/src/indexers.ts
@@ -150,6 +150,11 @@ export type LgParsed = {
   templates: LgTemplate[];
 };
 
+export type LanguageFileImport = {
+  id: string;
+  importPath: string;
+};
+
 export type LgFile = {
   id: string;
   content: string;