diff --git a/files-override/.eslintrc.cjs b/files-override/.eslintrc.cjs
new file mode 100644
index 0000000..fb0ac4d
--- /dev/null
+++ b/files-override/.eslintrc.cjs
@@ -0,0 +1,98 @@
+'use strict';
+
+module.exports = {
+  overrides: [
+    {
+      files: ['*.{js,ts,mjs,cjs}'],
+      plugins: ['ember'],
+      parser: '@typescript-eslint/parser',
+      extends: ['eslint:recommended', 'plugin:ember/recommended'],
+    },
+    {
+      files: ['*.gts'],
+      parser: 'ember-eslint-parser',
+      plugins: ['ember'],
+      extends: [
+        'eslint:recommended',
+        'plugin:ember/recommended',
+        'plugin:ember/recommended-gts',
+      ],
+    },
+    {
+      files: ['*.gjs'],
+      parser: 'ember-eslint-parser',
+      plugins: ['ember'],
+      extends: [
+        'eslint:recommended',
+        'plugin:ember/recommended',
+        'plugin:ember/recommended-gjs',
+      ],
+    },
+    // test files
+    {
+      files: ['tests/**/*-test.{js,ts}'],
+      plugins: ['ember'],
+      parser: '@typescript-eslint/parser',
+      extends: ['eslint:recommended', 'plugin:qunit/recommended'],
+    },
+    {
+      files: ['tests/**/*-test.{gjs,gts}'],
+      parser: 'ember-eslint-parser',
+      plugins: ['ember'],
+      extends: [
+        'eslint:recommended',
+        'plugin:ember/recommended',
+        'plugin:ember/recommended-gts',
+      ],
+    },
+    {
+      files: ['*.gts', '*.ts'],
+      plugins: ['no-relative-import-paths'],
+      settings: {
+        node: {
+          tryExtensions: ['.gts', '.ts', '.js', '.module.css', '.css'],
+        },
+      },
+      rules: {
+        'no-relative-import-paths/no-relative-import-paths': [
+          'warn',
+          { allowSameFolder: true, rootDir: 'app', prefix: 'discord-clone' },
+        ],
+        'n/file-extension-in-import': [
+          'error',
+          'always',
+          {
+            '.css': 'always',
+            '.module.css': 'always',
+            '.gts': 'never',
+            '.ts': 'never',
+            '.js': 'never',
+          },
+        ],
+      },
+    },
+
+    // node files
+    {
+      files: [
+        './.eslintrc.{js,cjs}',
+        './.prettierrc.{js,cjs}',
+        './.stylelintrc.{js,cjs}',
+        './.template-lintrc.{js,cjs}',
+        './ember-cli-build.js',
+        './testem.js',
+        './blueprints/*/index.js',
+        './config/**/*.js',
+        './lib/*/index.js',
+        './server/**/*.js',
+        '*.mjs',
+        '*.cjs',
+      ],
+      env: {
+        browser: false,
+        node: true,
+      },
+      extends: ['plugin:n/recommended'],
+    },
+  ],
+};
diff --git a/files-override/.prettierrc.cjs b/files-override/.prettierrc.cjs
new file mode 100644
index 0000000..6197eb1
--- /dev/null
+++ b/files-override/.prettierrc.cjs
@@ -0,0 +1,34 @@
+'use strict';
+
+module.exports = {
+  plugins: ['prettier-plugin-ember-template-tag'],
+  overrides: [
+    {
+      files: ['*.js', '*.ts', '*.cjs', '.mjs', '.cts', '.mts', '.cts'],
+      options: {
+        singleQuote: true,
+        trailingComma: 'es5',
+      },
+    },
+    {
+      files: ['*.json'],
+      options: {
+        singleQuote: false,
+      },
+    },
+    {
+      files: ['*.hbs'],
+      options: {
+        singleQuote: false,
+      },
+    },
+    {
+      files: ['*.gjs', '*.gts'],
+      options: {
+        singleQuote: true,
+        templateSingleQuote: false,
+        trailingComma: 'es5',
+      },
+    },
+  ],
+};
diff --git a/files-override/app/app.js b/files-override/app/app.ts
similarity index 100%
rename from files-override/app/app.js
rename to files-override/app/app.ts
diff --git a/files-override/tsconfig.json b/files-override/tsconfig.json
new file mode 100644
index 0000000..db88a01
--- /dev/null
+++ b/files-override/tsconfig.json
@@ -0,0 +1,46 @@
+{
+  "extends": "@tsconfig/ember/tsconfig.json",
+  "include": [
+    "app/**/*",
+    "tests/**/*",
+  ],
+  "glint": {
+    "environment": [
+      "ember-loose",
+      "ember-template-imports"
+    ]
+  },
+  "compilerOptions": {
+    "allowJs": true,
+    /**
+      https://www.typescriptlang.org/tsconfig#noEmitOnError
+      Do not block emit on TS errors.
+    */
+    "noEmitOnError": false,
+
+    "declaration": false,
+    "declarationMap": false,
+
+    /**
+      https://www.typescriptlang.org/tsconfig#allowImportingTsExtensions
+
+      We want our tooling to know how to resolve our custom files so the appropriate plugins
+      can do the proper transformations on those files.
+    */
+    "allowImportingTsExtensions": true,
+    "paths": {
+      "<%= name %./tests/*": [
+        "./tests/*"
+      ],
+      "<%= naem %./*": [
+        "./app/*"
+      ],
+      "*": [
+        "./types/*"
+      ]
+    },
+    "types": [
+      "ember-source/types"
+    ]
+  },
+}
diff --git a/files/babel.config.cjs b/files/babel.config.cjs
index 419088a..9572987 100644
--- a/files/babel.config.cjs
+++ b/files/babel.config.cjs
@@ -5,6 +5,14 @@ const {
 
 module.exports = {
   plugins: [
+    [
+      '@babel/plugin-transform-typescript',
+      {
+        allExtensions: true,
+        onlyRemoveTypeImports: true,
+        allowDeclareFields: true,
+      },
+    ],
     [
       'babel-plugin-ember-template-compilation',
       {
diff --git a/index.js b/index.js
index 669af02..9b965ec 100644
--- a/index.js
+++ b/index.js
@@ -3,7 +3,7 @@ const fs = require('fs');
 const { join } = require('path');
 const emberCliUpdate = require('./lib/ember-cli-update');
 const copyWithTemplate = require('./lib/copy-with-template');
-const { rm } = require('fs/promises');
+const { rm, readFile } = require('fs/promises');
 
 const appBlueprint = Blueprint.lookup('app');
 
@@ -23,6 +23,84 @@ module.exports = {
   },
 
   async updateDeps(options) {
+    let manifestPath = join(options.target, 'package.json');
+    let manifestBuffer = await readFile(manifestPath);
+    let manifest = JSON.parse(manifestBuffer.toString());
+
+    let existingDeps = [
+      ...Object.keys(manifest.dependencies || {}),
+      ...Object.keys(manifest.devDependencies || {}),
+    ];
+
+    let uninstallTask = this.taskFor('npm-uninstall');
+    const packages = [
+      'ember-fetch',
+      'broccoli-asset-rev',
+      'ember-cli-app-version',
+      'ember-cli-clean-css',
+      'ember-cli-dependency-checker',
+      'ember-cli-sri',
+      'ember-cli-terser',
+
+      // Upstream TypeScript blueprint is too conservative
+      // at the same time, ember-data has been what's holding it back
+      '@types/ember',
+      '@types/ember-data',
+      '@types/ember-data__adapter',
+      '@types/ember-data__model',
+      '@types/ember-data__serializer',
+      '@types/ember-data__store',
+      '@types/ember__application',
+      '@types/ember__array',
+      '@types/ember__component',
+      '@types/ember__controller',
+      '@types/ember__debug',
+      '@types/ember__destroyable',
+      '@types/ember__engine',
+      '@types/ember__error',
+      '@types/ember__helper',
+      '@types/ember__modifier',
+      '@types/ember__object',
+      '@types/ember__owner',
+      '@types/ember__polyfills',
+      '@types/ember__routing',
+      '@types/ember__runloop',
+      '@types/ember__service',
+      '@types/ember__string',
+      '@types/ember__template',
+      '@types/ember__test',
+      '@types/ember__utils',
+
+      // These dependencies in the blueprint we want to keep (if they exist)
+      // but they are generally too out of date
+      '@ember/string',
+      '@ember/test-helpers',
+      'ember-resolver',
+      'eslint-plugin-ember',
+      'ember-template-lint',
+      'qunit-dom',
+      'qunit',
+      'stylelint',
+      'stylelint-prettier',
+      'stylelint-config-standard',
+      'concurrently',
+      'typescript',
+
+      '@glint/core',
+      '@glint/environment-ember-loose', // currently required :(
+      '@glint/environment-ember-template-imports',
+      '@glint/template',
+      '@typescript-eslint/eslint-plugin',
+      '@typescript-eslint/parser',
+    ].filter((depToRemove) => existingDeps.includes(depToRemove));
+
+    await uninstallTask.run({
+      'save-dev': true,
+      verbose: false,
+      packages,
+      packageManager: options.packageManager,
+    });
+
     // this.addPackagesToProject doesn't respect the packageManager that the blueprint specified 🙈 so we're skipping a level here
     let installTask = this.taskFor('npm-install');
     await installTask.run({
@@ -37,40 +115,46 @@ module.exports = {
         'vite',
         '@rollup/plugin-babel',
         'decorator-transforms',
+
+        // Dependencies out of date from upstream
+        '@ember/string',
+        '@ember/test-helpers',
+        'ember-resolver',
+        'eslint-plugin-ember',
+        'ember-template-lint',
+        'qunit-dom',
+        'qunit',
+        'stylelint',
+        'stylelint-prettier',
+        'stylelint-config-standard',
+        'concurrently',
+        'prettier-plugin-ember-template-tag',
+
+        // TypeScript
+        // Note that Vite supports TypeScript with 0 configuration on the user's part
+        '@babel/plugin-transform-typescript',
+        'typescript',
+        '@glint/core',
+        '@glint/environment-ember-loose', // currently required :(
+        '@glint/environment-ember-template-imports',
+        '@glint/template',
+        '@typescript-eslint/eslint-plugin',
+        '@typescript-eslint/parser',
       ],
       packageManager: options.packageManager,
     });
-
-    let uninstallTask = this.taskFor('npm-uninstall');
-    const packages = [
-      'ember-fetch',
-      'broccoli-asset-rev',
-      'ember-cli-app-version',
-      'ember-cli-clean-css',
-      'ember-cli-dependency-checker',
-      'ember-cli-sri',
-      'ember-cli-terser',
-    ];
-
-    for (const package of packages) {
-      try {
-        await uninstallTask.run({
-          'save-dev': true,
-          verbose: false,
-          packages: [package],
-          packageManager: options.packageManager,
-        });
-      } catch {
-        console.log(`Could not uninstall ${package}`);
-      }
-    }
   },
 
   async afterInstall(options) {
-    const filesToDelete = ['app/index.html'];
+    const filesToDelete = [
+      'app/index.html',
+      '.eslintrc.js',
+      '.prettierrc.js',
+      'types',
+    ];
 
     for (let file of filesToDelete) {
-      await rm(join(options.target, file));
+      await rm(join(options.target, file), { recursive: true });
     }
 
     // there doesn't seem to be a way to tell ember-cli to not prompt to override files that were added in the beforeInstall