diff --git a/.circleci/config.yml b/.circleci/config.yml
index 86d85a1b9..b281a25de 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -576,7 +576,7 @@ jobs:
       - persist_to_workspace:
           root: .
           paths:
-            - development/ts-migration-dashboard/build
+            - development/ts-migration-dashboard/build/final
 
   test-yarn-dedupe:
     executor: node-browsers
@@ -1013,7 +1013,7 @@ jobs:
           path: storybook-build
           destination: storybook
       - store_artifacts:
-          path: development/ts-migration-dashboard/build
+          path: development/ts-migration-dashboard/build/final
           destination: ts-migration-dashboard
       - run:
           name: Set branch parent commit env var
diff --git a/.gitignore b/.gitignore
index 11d9f53ea..aa4628d7a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,7 +34,6 @@ dist
 builds/
 builds.zip
 development/ts-migration-dashboard/build
-development/ts-migration-dashboard/intermediate
 
 test-artifacts
 test-builds
diff --git a/development/ts-migration-dashboard/src/App.tsx b/development/ts-migration-dashboard/app/components/App.tsx
similarity index 80%
rename from development/ts-migration-dashboard/src/App.tsx
rename to development/ts-migration-dashboard/app/components/App.tsx
index d799815b4..3a196f7ca 100644
--- a/development/ts-migration-dashboard/src/App.tsx
+++ b/development/ts-migration-dashboard/app/components/App.tsx
@@ -1,21 +1,7 @@
 import React from 'react';
 import classnames from 'classnames';
 import { Tooltip as ReactTippy } from 'react-tippy';
-import { ModulePartition } from '../scripts/build-module-partitions';
-
-// The `brfs` transform for browserify calls `fs.readLineSync` and
-// `path.resolve` at build time and inlines file contents into the source code.
-// To accomplish this we have to bring in `fs` and `path` using `require` and
-// not `import`. This is weird in a TypeScript file, and typescript-eslint
-// (rightly) complains about this, but it's actually okay because the above
-// `import` lines will actually get turned into `require`s anyway before passing
-// through the rest of browserify. However, `brfs` should handle this. There is
-// an active bug for this, but there isn't a known workaround yet:
-// <https://github.com/browserify/brfs/issues/39>
-/* eslint-disable-next-line @typescript-eslint/no-require-imports,@typescript-eslint/no-var-requires */
-const fs = require('fs');
-/* eslint-disable-next-line @typescript-eslint/no-require-imports,@typescript-eslint/no-var-requires */
-const path = require('path');
+import { readPartitionsFile } from '../../common/partitions-file';
 
 type Summary = {
   numConvertedFiles: number;
@@ -27,14 +13,7 @@ function calculatePercentageComplete(summary: Summary) {
 }
 
 export default function App() {
-  const partitions = JSON.parse(
-    fs.readFileSync(
-      path.resolve(__dirname, '../intermediate/partitions.json'),
-      {
-        encoding: 'utf-8',
-      },
-    ),
-  ) as ModulePartition[];
+  const partitions = readPartitionsFile();
 
   const allFiles = partitions.flatMap((partition) => {
     return partition.children;
diff --git a/development/ts-migration-dashboard/app/index.scss b/development/ts-migration-dashboard/app/index.scss
new file mode 100644
index 000000000..6125516d4
--- /dev/null
+++ b/development/ts-migration-dashboard/app/index.scss
@@ -0,0 +1,4 @@
+@import '../../../ui/css/reset';
+@import './styles/tippy';
+@import './styles/native-elements';
+@import './styles/custom-elements';
diff --git a/development/ts-migration-dashboard/src/index.tsx b/development/ts-migration-dashboard/app/index.tsx
similarity index 81%
rename from development/ts-migration-dashboard/src/index.tsx
rename to development/ts-migration-dashboard/app/index.tsx
index 5c458b5ae..a18d9c2ab 100644
--- a/development/ts-migration-dashboard/src/index.tsx
+++ b/development/ts-migration-dashboard/app/index.tsx
@@ -1,6 +1,6 @@
 import * as React from 'react';
 import ReactDOM from 'react-dom';
-import App from './App';
+import App from './components/App';
 
 const appElement = document.querySelector('#app');
 
diff --git a/development/ts-migration-dashboard/src/public/images/metamask-fox.svg b/development/ts-migration-dashboard/app/public/images/metamask-fox.svg
similarity index 100%
rename from development/ts-migration-dashboard/src/public/images/metamask-fox.svg
rename to development/ts-migration-dashboard/app/public/images/metamask-fox.svg
diff --git a/development/ts-migration-dashboard/src/public/index.html b/development/ts-migration-dashboard/app/public/index.html
similarity index 100%
rename from development/ts-migration-dashboard/src/public/index.html
rename to development/ts-migration-dashboard/app/public/index.html
diff --git a/development/ts-migration-dashboard/src/index.scss b/development/ts-migration-dashboard/app/styles/custom-elements.scss
similarity index 76%
rename from development/ts-migration-dashboard/src/index.scss
rename to development/ts-migration-dashboard/app/styles/custom-elements.scss
index 863fb52c2..985a423ab 100644
--- a/development/ts-migration-dashboard/src/index.scss
+++ b/development/ts-migration-dashboard/app/styles/custom-elements.scss
@@ -1,61 +1,3 @@
-@import '../../../ui/css/reset';
-@import './tippy';
-
-/* Native elements */
-
-* {
-  box-sizing: border-box;
-}
-
-html {
-  font-family:
-    -apple-system,
-    BlinkMacSystemFont,
-    "Segoe UI",
-    Helvetica,
-    Arial,
-    sans-serif,
-    "Apple Color Emoji",
-    "Segoe UI Emoji";
-  font-size: 16px;
-}
-
-body {
-  padding: 2rem;
-}
-
-p:not(:last-child) {
-  margin-bottom: 1rem;
-}
-
-code {
-  font-size: 0.85em;
-  font-family:
-    ui-monospace,
-    SFMono-Regular,
-    SF Mono,
-    Menlo,
-    Consolas,
-    Liberation Mono,
-    monospace;
-}
-
-strong {
-  font-weight: bold;
-}
-
-em {
-  font-style: italic;
-}
-
-ul {
-  list-style: disc;
-  margin-bottom: 1rem;
-  margin-left: 1rem;
-}
-
-/* Custom elements */
-
 :root {
   --blue-gray-350: hsl(209deg 13.7% 62.4%);
   --blue-gray-100: hsl(209.8deg 16.5% 89%);
diff --git a/development/ts-migration-dashboard/app/styles/native-elements.scss b/development/ts-migration-dashboard/app/styles/native-elements.scss
new file mode 100644
index 000000000..1ef31399d
--- /dev/null
+++ b/development/ts-migration-dashboard/app/styles/native-elements.scss
@@ -0,0 +1,50 @@
+* {
+  box-sizing: border-box;
+}
+
+html {
+  font-family:
+    -apple-system,
+    BlinkMacSystemFont,
+    "Segoe UI",
+    Helvetica,
+    Arial,
+    sans-serif,
+    "Apple Color Emoji",
+    "Segoe UI Emoji";
+  font-size: 16px;
+}
+
+body {
+  padding: 2rem;
+}
+
+p:not(:last-child) {
+  margin-bottom: 1rem;
+}
+
+code {
+  font-size: 0.85em;
+  font-family:
+    ui-monospace,
+    SFMono-Regular,
+    SF Mono,
+    Menlo,
+    Consolas,
+    Liberation Mono,
+    monospace;
+}
+
+strong {
+  font-weight: bold;
+}
+
+em {
+  font-style: italic;
+}
+
+ul {
+  list-style: disc;
+  margin-bottom: 1rem;
+  margin-left: 1rem;
+}
diff --git a/development/ts-migration-dashboard/src/tippy.scss b/development/ts-migration-dashboard/app/styles/tippy.scss
similarity index 100%
rename from development/ts-migration-dashboard/src/tippy.scss
rename to development/ts-migration-dashboard/app/styles/tippy.scss
diff --git a/development/ts-migration-dashboard/scripts/build-module-partitions.ts b/development/ts-migration-dashboard/common/build-module-partitions.ts
similarity index 97%
rename from development/ts-migration-dashboard/scripts/build-module-partitions.ts
rename to development/ts-migration-dashboard/common/build-module-partitions.ts
index 4d4bcc5d8..8ceaff18a 100644
--- a/development/ts-migration-dashboard/scripts/build-module-partitions.ts
+++ b/development/ts-migration-dashboard/common/build-module-partitions.ts
@@ -3,7 +3,7 @@ import path from 'path';
 import fg from 'fast-glob';
 import madge from 'madge';
 import {
-  BASE_DIRECTORY,
+  ROOT_DIRECTORY_PATH,
   ENTRYPOINT_PATTERNS,
   FILES_TO_CONVERT_PATH,
 } from './constants';
@@ -66,7 +66,7 @@ export default async function buildModulePartitions(): Promise<
     await Promise.all(
       ENTRYPOINT_PATTERNS.map((entrypointPattern) => {
         return fg(
-          path.resolve(BASE_DIRECTORY, `${entrypointPattern}.{js,ts,tsx}`),
+          path.resolve(ROOT_DIRECTORY_PATH, `${entrypointPattern}.{js,ts,tsx}`),
         );
       }),
     )
@@ -74,14 +74,14 @@ export default async function buildModulePartitions(): Promise<
 
   const entryFilePaths = filterFilePaths(
     possibleEntryFilePaths.map((possibleEntrypoint) =>
-      path.relative(BASE_DIRECTORY, possibleEntrypoint),
+      path.relative(ROOT_DIRECTORY_PATH, possibleEntrypoint),
     ),
     allowedFilePaths,
   );
 
   const result = await madge(entryFilePaths, {
-    baseDir: BASE_DIRECTORY,
-    tsConfig: path.join(BASE_DIRECTORY, 'tsconfig.json'),
+    baseDir: ROOT_DIRECTORY_PATH,
+    tsConfig: path.join(ROOT_DIRECTORY_PATH, 'tsconfig.json'),
   });
   const dependenciesByFilePath = result.obj();
   const modulesById = buildModulesWithLevels(
diff --git a/development/ts-migration-dashboard/common/constants.ts b/development/ts-migration-dashboard/common/constants.ts
new file mode 100644
index 000000000..55cbc98a6
--- /dev/null
+++ b/development/ts-migration-dashboard/common/constants.ts
@@ -0,0 +1,39 @@
+import path from 'path';
+
+export const ROOT_DIRECTORY_PATH = path.resolve(__dirname, '../../..');
+export const PROJECT_DIRECTORY_PATH = path.join(
+  ROOT_DIRECTORY_PATH,
+  'development',
+  'ts-migration-dashboard',
+);
+export const COMMON_DIRECTORY_PATH = path.join(
+  PROJECT_DIRECTORY_PATH,
+  'common',
+);
+export const APP_DIRECTORY_PATH = path.join(PROJECT_DIRECTORY_PATH, 'app');
+export const INTERMEDIATE_BUILD_DIRECTORY_PATH = path.join(
+  PROJECT_DIRECTORY_PATH,
+  'build',
+  'intermediate',
+);
+export const FINAL_BUILD_DIRECTORY_PATH = path.join(
+  PROJECT_DIRECTORY_PATH,
+  'build',
+  'final',
+);
+export const ENTRYPOINT_PATTERNS = [
+  'app/scripts/background',
+  'app/scripts/contentscript',
+  'app/scripts/disable-console',
+  'app/scripts/inpage',
+  'app/scripts/phishing-detect',
+  'app/scripts/sentry-install',
+  'app/scripts/ui',
+  'development/build/index',
+  '**/*.stories',
+  '**/*.test',
+];
+export const FILES_TO_CONVERT_PATH = path.join(
+  PROJECT_DIRECTORY_PATH,
+  'files-to-convert.json',
+);
diff --git a/development/ts-migration-dashboard/common/partitions-file.ts b/development/ts-migration-dashboard/common/partitions-file.ts
new file mode 100644
index 000000000..e14c9a24f
--- /dev/null
+++ b/development/ts-migration-dashboard/common/partitions-file.ts
@@ -0,0 +1,40 @@
+import { ModulePartition } from './build-module-partitions';
+import { INTERMEDIATE_BUILD_DIRECTORY_PATH } from './constants';
+
+// The `brfs` transform for browserify calls `fs.readLineSync` and
+// `path.resolve` at build time and inlines file contents into the source code.
+// To accomplish this we have to bring in `fs` and `path` using `require` and
+// not `import`. This is weird in a TypeScript file, and typescript-eslint
+// (rightly) complains about this, but it's actually okay because the above
+// `import` lines will actually get turned into `require`s anyway before passing
+// through the rest of browserify. However, `brfs` should handle this. There is
+// an active bug for this, but there isn't a known workaround yet:
+// <https://github.com/browserify/brfs/issues/39>
+/* eslint-disable-next-line @typescript-eslint/no-require-imports,@typescript-eslint/no-var-requires */
+const fs = require('fs');
+/* eslint-disable-next-line @typescript-eslint/no-require-imports,@typescript-eslint/no-var-requires */
+const path = require('path');
+
+export const PARTITIONS_FILE = path.join(
+  INTERMEDIATE_BUILD_DIRECTORY_PATH,
+  'partitions.json',
+);
+
+export function readPartitionsFile() {
+  const content = fs.readFileSync(
+    // As this function is called within the app code, which is compiled by
+    // Browserify and not executed by Node, this needs to be here — it cannot be
+    // extracted — for the reasons explained above.
+    path.resolve(__dirname, '../build/intermediate/partitions.json'),
+    { encoding: 'utf-8' },
+  );
+  return JSON.parse(content) as ModulePartition[];
+}
+
+export function writePartitionsFile(partitions: ModulePartition[]) {
+  fs.mkdirSync(path.dirname(PARTITIONS_FILE), { recursive: true });
+  return fs.writeFileSync(
+    PARTITIONS_FILE,
+    JSON.stringify(partitions, null, '  '),
+  );
+}
diff --git a/development/ts-migration-dashboard/scripts/build.ts b/development/ts-migration-dashboard/scripts/build-app.ts
similarity index 76%
rename from development/ts-migration-dashboard/scripts/build.ts
rename to development/ts-migration-dashboard/scripts/build-app.ts
index ebf0bec70..772ce49e1 100644
--- a/development/ts-migration-dashboard/scripts/build.ts
+++ b/development/ts-migration-dashboard/scripts/build-app.ts
@@ -12,16 +12,19 @@ import gulpDartSass from 'gulp-dart-sass';
 import sourcemaps from 'gulp-sourcemaps';
 import autoprefixer from 'gulp-autoprefixer';
 import fg from 'fast-glob';
-import buildModulePartitions from './build-module-partitions';
+import buildModulePartitions from '../common/build-module-partitions';
+import {
+  PARTITIONS_FILE,
+  writePartitionsFile,
+} from '../common/partitions-file';
+import {
+  PROJECT_DIRECTORY_PATH,
+  COMMON_DIRECTORY_PATH,
+  APP_DIRECTORY_PATH,
+  FINAL_BUILD_DIRECTORY_PATH,
+} from '../common/constants';
 
 const promisifiedPump = pify(pump);
-const projectDirectoryPath = path.resolve(__dirname, '../');
-const sourceDirectoryPath = path.join(projectDirectoryPath, 'src');
-const intermediateDirectoryPath = path.join(
-  projectDirectoryPath,
-  'intermediate',
-);
-const buildDirectoryPath = path.join(projectDirectoryPath, 'build');
 
 main().catch((error) => {
   console.error(error);
@@ -31,21 +34,15 @@ main().catch((error) => {
 /**
  * Compiles a set of files that we want to convert to TypeScript, divided by
  * level in the dependency tree.
- *
- * @param dest - The directory in which to hold the file.
  */
-async function generateIntermediateFiles(dest: string) {
+async function generateIntermediateFiles() {
   const partitions = await buildModulePartitions();
-  const partitionsFile = path.resolve(dest, 'partitions.json');
-  await pify(fs.writeFile)(
-    partitionsFile,
-    JSON.stringify(partitions, null, '  '),
-  );
+  writePartitionsFile(partitions);
 
   console.log(
     `- Wrote intermediate partitions file: ${path.relative(
-      projectDirectoryPath,
-      partitionsFile,
+      PROJECT_DIRECTORY_PATH,
+      PARTITIONS_FILE,
     )}`,
   );
 }
@@ -81,9 +78,9 @@ async function compileScripts(src: string, dest: string) {
 
   console.log(
     `- Compiled scripts: ${path.relative(
-      projectDirectoryPath,
+      PROJECT_DIRECTORY_PATH,
       src,
-    )} -> ${path.relative(projectDirectoryPath, dest)}`,
+    )} -> ${path.relative(PROJECT_DIRECTORY_PATH, dest)}`,
   );
 }
 
@@ -106,9 +103,9 @@ async function compileStylesheets(src: string, dest: string): Promise<void> {
   );
   console.log(
     `- Compiled stylesheets: ${path.relative(
-      projectDirectoryPath,
+      PROJECT_DIRECTORY_PATH,
       src,
-    )} -> ${path.relative(projectDirectoryPath, dest)}`,
+    )} -> ${path.relative(PROJECT_DIRECTORY_PATH, dest)}`,
   );
 }
 
@@ -128,9 +125,9 @@ async function copyStaticFiles(src: string, dest: string): Promise<void> {
       await fs.copy(srcEntry, destEntry);
       console.log(
         `- Copied static files: ${path.relative(
-          projectDirectoryPath,
+          PROJECT_DIRECTORY_PATH,
           srcEntry,
-        )} -> ${path.relative(projectDirectoryPath, destEntry)}`,
+        )} -> ${path.relative(PROJECT_DIRECTORY_PATH, destEntry)}`,
       );
     }),
   );
@@ -160,25 +157,24 @@ async function rebuild({
     console.log('Detected change, rebuilding...');
   }
 
-  await fs.emptyDir(buildDirectoryPath);
+  await fs.emptyDir(FINAL_BUILD_DIRECTORY_PATH);
 
   try {
     if (isInitial) {
-      await fs.emptyDir(intermediateDirectoryPath);
-      await generateIntermediateFiles(intermediateDirectoryPath);
+      await generateIntermediateFiles();
     }
 
     await compileScripts(
-      path.join(sourceDirectoryPath, 'index.tsx'),
-      path.join(buildDirectoryPath, 'index.js'),
+      path.join(APP_DIRECTORY_PATH, 'index.tsx'),
+      path.join(FINAL_BUILD_DIRECTORY_PATH, 'index.js'),
     );
     await compileStylesheets(
-      path.join(sourceDirectoryPath, 'index.scss'),
-      path.join(buildDirectoryPath),
+      path.join(APP_DIRECTORY_PATH, 'index.scss'),
+      FINAL_BUILD_DIRECTORY_PATH,
     );
     await copyStaticFiles(
-      path.join(sourceDirectoryPath, 'public'),
-      path.join(buildDirectoryPath),
+      path.join(APP_DIRECTORY_PATH, 'public'),
+      FINAL_BUILD_DIRECTORY_PATH,
     );
   } catch (error: unknown) {
     console.error(error);
@@ -202,7 +198,7 @@ async function main() {
     .alias('h', 'help')
     .parseSync();
 
-  console.log(`Working directory: ${projectDirectoryPath}`);
+  console.log(`Working directory: ${PROJECT_DIRECTORY_PATH}`);
 
   if (opts.watch) {
     const rebuildIgnoringErrors = () => {
@@ -211,9 +207,15 @@ async function main() {
       });
     };
     chokidar
-      .watch(path.join(sourceDirectoryPath, '**/*.{html,ts,tsx,scss}'), {
-        ignoreInitial: true,
-      })
+      .watch(
+        [
+          path.join(COMMON_DIRECTORY_PATH, '**/*.{html,ts,tsx,scss}'),
+          path.join(APP_DIRECTORY_PATH, '**/*.{html,ts,tsx,scss}'),
+        ],
+        {
+          ignoreInitial: true,
+        },
+      )
       .on('add', rebuildIgnoringErrors)
       .on('change', rebuildIgnoringErrors)
       .on('unlink', rebuildIgnoringErrors)
diff --git a/development/ts-migration-dashboard/scripts/constants.ts b/development/ts-migration-dashboard/scripts/constants.ts
deleted file mode 100644
index a283fd8e0..000000000
--- a/development/ts-migration-dashboard/scripts/constants.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import path from 'path';
-
-export const BASE_DIRECTORY = path.resolve(__dirname, '../../..');
-export const ENTRYPOINT_PATTERNS = [
-  'app/scripts/background',
-  'app/scripts/contentscript',
-  'app/scripts/disable-console',
-  'app/scripts/inpage',
-  'app/scripts/phishing-detect',
-  'app/scripts/sentry-install',
-  'app/scripts/ui',
-  'development/build/index',
-  '**/*.stories',
-  '**/*.test',
-];
-export const FILES_TO_CONVERT_PATH = path.join(
-  __dirname,
-  '../files-to-convert.json',
-);
diff --git a/development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts b/development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts
index cd375ca9d..ead0cb218 100644
--- a/development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts
+++ b/development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts
@@ -3,10 +3,10 @@ import fs from 'fs';
 import fg from 'fast-glob';
 import madge from 'madge';
 import {
-  BASE_DIRECTORY,
+  ROOT_DIRECTORY_PATH,
   ENTRYPOINT_PATTERNS,
   FILES_TO_CONVERT_PATH,
-} from './constants';
+} from '../common/constants';
 
 main().catch((error) => {
   console.error(error);
@@ -26,7 +26,7 @@ async function main(): Promise<void> {
     await Promise.all(
       ENTRYPOINT_PATTERNS.map((entrypointPattern) => {
         return fg(
-          path.resolve(BASE_DIRECTORY, `${entrypointPattern}.{js,ts,tsx}`),
+          path.resolve(ROOT_DIRECTORY_PATH, `${entrypointPattern}.{js,ts,tsx}`),
         );
       }),
     )
@@ -35,7 +35,7 @@ async function main(): Promise<void> {
     `Traversing dependency trees for ${entrypoints.length} entrypoints, please wait...`,
   );
   const result = await madge(entrypoints, {
-    baseDir: BASE_DIRECTORY,
+    baseDir: ROOT_DIRECTORY_PATH,
   });
   const dependenciesByFilePath = result.obj();
   const sortedFilePaths = Object.keys(dependenciesByFilePath)
diff --git a/package.json b/package.json
index 5b254f742..3e830d188 100644
--- a/package.json
+++ b/package.json
@@ -83,10 +83,10 @@
     "lavamoat:webapp:auto:ci": "node ./development/generate-lavamoat-policies.js --parallel=false",
     "lavamoat:auto": "yarn lavamoat:build:auto && yarn lavamoat:webapp:auto",
     "lavamoat:auto:ci": "yarn lavamoat:build:auto && yarn lavamoat:webapp:auto:ci",
+    "ts-migration:dashboard:build": "ts-node development/ts-migration-dashboard/scripts/build-app.ts",
+    "ts-migration:dashboard:deploy": "gh-pages --dist development/ts-migration-dashboard/build/final --remote ts-migration-dashboard",
+    "ts-migration:dashboard:watch": "yarn ts-migration:dashboard:build --watch",
     "ts-migration:enumerate": "ts-node development/ts-migration-dashboard/scripts/write-list-of-files-to-convert.ts",
-    "ts-migration:dashboard:watch": "ts-node development/ts-migration-dashboard/scripts/build.ts --watch",
-    "ts-migration:dashboard:build": "ts-node development/ts-migration-dashboard/scripts/build.ts",
-    "ts-migration:dashboard:deploy": "gh-pages --dist development/ts-migration-dashboard/build --remote ts-migration-dashboard",
     "test-storybook": "test-storybook -c .storybook",
     "test-storybook:ci": "concurrently -k -s first -n \"SB,TEST\" -c \"magenta,blue\" \"yarn storybook:build && npx http-server storybook-build --port 6006 \" \"wait-on tcp:6006 && yarn test-storybook --maxWorkers=2\""
   },