diff --git a/__fixtures__/test-project/package.json b/__fixtures__/test-project/package.json
index 1ed6603e14..ec57e79fc2 100644
--- a/__fixtures__/test-project/package.json
+++ b/__fixtures__/test-project/package.json
@@ -2,7 +2,8 @@
   "private": true,
   "workspaces": [
     "api",
-    "web"
+    "web",
+    "packages/*"
   ],
   "devDependencies": {
     "@cedarjs/core": "2.3.0",
diff --git a/__fixtures__/test-project/packages/validators/README.md b/__fixtures__/test-project/packages/validators/README.md
new file mode 100644
index 0000000000..ecfd785633
--- /dev/null
+++ b/__fixtures__/test-project/packages/validators/README.md
@@ -0,0 +1,15 @@
+# Shared Package '@my-org/validators'
+
+Use code in this package by adding it to the dependencies on the side you want
+to use it, with the special `workspace:*` version. After that you can import it
+into your code:
+
+```json
+  "dependencies": {
+    "@my-org/validators": "workspace:*"
+  }
+```
+
+```javascript
+import { validators } from '@my-org/validators'
+```
diff --git a/__fixtures__/test-project/packages/validators/package.json b/__fixtures__/test-project/packages/validators/package.json
new file mode 100644
index 0000000000..e52bec0137
--- /dev/null
+++ b/__fixtures__/test-project/packages/validators/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "@my-org/validators",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
+    }
+  },
+  "scripts": {
+    "build": "tsc",
+    "watch": "tsc --watch"
+  },
+  "devDependencies": {
+    "@cedarjs/testing": "2.2.1",
+    "typescript": "5.9.3"
+  }
+}
diff --git a/__fixtures__/test-project/packages/validators/src/index.ts b/__fixtures__/test-project/packages/validators/src/index.ts
new file mode 100644
index 0000000000..22aefe648c
--- /dev/null
+++ b/__fixtures__/test-project/packages/validators/src/index.ts
@@ -0,0 +1,5 @@
+export function validateEmail(email: string) {
+  return email.includes('@') &&
+    email.includes('.') &&
+    email.lastIndexOf('.') > email.indexOf('@') + 1
+}
diff --git a/__fixtures__/test-project/packages/validators/src/validators.test.ts b/__fixtures__/test-project/packages/validators/src/validators.test.ts
new file mode 100644
index 0000000000..110ad35ba3
--- /dev/null
+++ b/__fixtures__/test-project/packages/validators/src/validators.test.ts
@@ -0,0 +1,7 @@
+import { validateEmail } from './index.js'
+
+describe('validators', () => {
+  it('should not throw any errors', async () => {
+    expect(validateEmail('valid@email.com')).not.toThrow()
+  })
+})
diff --git a/__fixtures__/test-project/packages/validators/tsconfig.json b/__fixtures__/test-project/packages/validators/tsconfig.json
new file mode 100644
index 0000000000..a405d33430
--- /dev/null
+++ b/__fixtures__/test-project/packages/validators/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "target": "ES2023",
+    "module": "Node20",
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "baseUrl": ".",
+    "rootDir": "src",
+    "outDir": "dist",
+    "sourceMap": true,
+    "declaration": true,
+    "declarationMap": true,
+  },
+  "include": ["src"],
+  "exclude": ["**/*.test.ts"],
+}
diff --git a/__fixtures__/test-project/redwood.toml b/__fixtures__/test-project/redwood.toml
index fd4787af4b..5d80e61f18 100644
--- a/__fixtures__/test-project/redwood.toml
+++ b/__fixtures__/test-project/redwood.toml
@@ -19,3 +19,6 @@
   open = true
 [notifications]
   versionUpdates = ["latest"]
+
+[experimental.packagesWorkspace]
+  enabled = true
diff --git a/__fixtures__/test-project/web/package.json b/__fixtures__/test-project/web/package.json
index fb781a867d..21a3055ff1 100644
--- a/__fixtures__/test-project/web/package.json
+++ b/__fixtures__/test-project/web/package.json
@@ -15,6 +15,7 @@
     "@cedarjs/forms": "2.3.0",
     "@cedarjs/router": "2.3.0",
     "@cedarjs/web": "2.3.0",
+    "@my-org/validators": "workspace:*",
     "humanize-string": "2.1.0",
     "react": "19.2.3",
     "react-dom": "19.2.3"
diff --git a/__fixtures__/test-project/web/src/pages/ContactUsPage/ContactUsPage.tsx b/__fixtures__/test-project/web/src/pages/ContactUsPage/ContactUsPage.tsx
index de6488e1a7..3f523f7717 100644
--- a/__fixtures__/test-project/web/src/pages/ContactUsPage/ContactUsPage.tsx
+++ b/__fixtures__/test-project/web/src/pages/ContactUsPage/ContactUsPage.tsx
@@ -1,5 +1,6 @@
 import { useState } from 'react'
 
+import { validateEmail } from '@my-org/validators'
 import { useForm } from 'react-hook-form'
 
 import {
@@ -94,9 +95,16 @@ const ContactUsPage = () => {
           name="email"
           validation={{
             required: true,
-            pattern: {
-              value: /[^@]+@[^.]+..+/,
-              message: 'Please enter a valid email address',
+            validate: (value) => {
+              if (!value) {
+                return 'Email is required'
+              }
+
+              if (!validateEmail(value)) {
+                return 'Please enter a valid email address'
+              }
+
+              return true
             },
           }}
           className="rounded-sm border px-2 py-1"
diff --git a/tasks/test-project/codemods/contactUsPage.js b/tasks/test-project/codemods/contactUsPage.js
index 6f21dce2fc..6b90251b9d 100644
--- a/tasks/test-project/codemods/contactUsPage.js
+++ b/tasks/test-project/codemods/contactUsPage.js
@@ -39,9 +39,16 @@ const body = `
     name="email"
     validation={{
       required: true,
-      pattern: {
-        value: /[^@]+@[^.]+\..+/,
-        message: 'Please enter a valid email address',
+      validate: (value) => {
+        if (!value) {
+          return 'Email is required'
+        }
+
+        if (!validateEmail(value)) {
+          return 'Please enter a valid email address'
+        }
+
+        return true
       },
     }}
     className="border rounded-sm px-2 py-1"
@@ -157,6 +164,15 @@ export default (file, api) => {
       ],
       j.stringLiteral('@cedarjs/router'),
     ),
+    j.importDeclaration(
+      [
+        j.importSpecifier(
+          j.identifier('validateEmail'),
+          j.identifier('validateEmail'),
+        ),
+      ],
+      j.stringLiteral('@my-org/validators'),
+    ),
   ]
 
   // Remove the `{ Link, routes }` imports that are generated and unused
diff --git a/tasks/test-project/rebuild-test-project-fixture.mts b/tasks/test-project/rebuild-test-project-fixture.mts
index 3b0aae4578..5983774886 100755
--- a/tasks/test-project/rebuild-test-project-fixture.mts
+++ b/tasks/test-project/rebuild-test-project-fixture.mts
@@ -498,6 +498,125 @@ async function runCommand() {
 
   await tuiTask({
     step: 10,
+    title: 'Add workspace packages',
+    task: async () => {
+      const tomlPath = path.join(OUTPUT_PROJECT_PATH, 'redwood.toml')
+      const redwoodToml = fs.readFileSync(tomlPath, 'utf-8')
+      const newRedwoodToml =
+        redwoodToml + '\n[experimental.packagesWorkspace]\n  enabled = true\n'
+
+      fs.writeFileSync(tomlPath, newRedwoodToml)
+
+      await exec(
+        'yarn cedar g package @my-org/validators',
+        [],
+        getExecaOptions(OUTPUT_PROJECT_PATH),
+      )
+
+      const packagePath = path.join(
+        OUTPUT_PROJECT_PATH,
+        'packages',
+        'validators',
+      )
+
+      fs.writeFileSync(
+        path.join(packagePath, 'src', 'index.ts'),
+        'export function validateEmail(email: string) {\n' +
+          "  return email.includes('@') &&\n" +
+          "    email.includes('.') &&\n" +
+          "    email.lastIndexOf('.') > email.indexOf('@') + 1\n" +
+          '}\n',
+      )
+
+      fs.writeFileSync(
+        path.join(packagePath, 'src', 'validators.test.ts'),
+        "import { validateEmail } from './index.js'\n" +
+          '\n' +
+          "describe('validators', () => {\n" +
+          "  it('should not throw any errors', async () => {\n" +
+          "    expect(validateEmail('valid@email.com')).not.toThrow()\n" +
+          '  })\n' +
+          '})\n',
+      )
+
+      const webPackageJson = JSON.parse(
+        fs.readFileSync(
+          path.join(OUTPUT_PROJECT_PATH, 'web', 'package.json'),
+          'utf8',
+        ),
+      )
+
+      webPackageJson.dependencies['@my-org/validators'] = 'workspace:*'
+
+      fs.writeFileSync(
+        path.join(OUTPUT_PROJECT_PATH, 'web', 'package.json'),
+        JSON.stringify(webPackageJson, null, 2),
+      )
+
+      await exec('yarn install', [], getExecaOptions(OUTPUT_PROJECT_PATH))
+
+      const build = await exec(
+        'yarn cedar build',
+        [],
+        getExecaOptions(OUTPUT_PROJECT_PATH),
+      )
+
+      const distFiles = fs.readdirSync(
+        path.join(OUTPUT_PROJECT_PATH, 'packages', 'validators', 'dist'),
+      )
+
+      if (distFiles.some((file) => file.includes('test'))) {
+        console.error('distFiles', distFiles)
+        throw new Error(
+          'Unexpected test file in validators package dist directory',
+        )
+      }
+
+      // TODO: Update this when we refine the build process
+      if (!build.stdout.includes('yarn build exited with code 0')) {
+        console.error('yarn cedar build output', build.stdout, build.stderr)
+        throw new Error('Unexpected output from `yarn cedar build`')
+      }
+
+      // Verify that `yarn cedar <cmd>` works inside package directories
+      // Starting with `yarn cedar info`
+      // TODO: Enable code below
+      // const info = await exec(
+      //   'yarn cedar info',
+      //   [],
+      //   getExecaOptions(OUTPUT_PROJECT_PATH),
+      // )
+
+      // if (
+      //   !info.stdout.includes('Binaries:') ||
+      //   !info.stdout.includes('Node:') ||
+      //   !info.stdout.includes('npmPackages:') ||
+      //   !info.stdout.includes('@cedarjs/core')
+      // ) {
+      //   console.error('yarn cedar info output', info.stdout, info.stderr)
+
+      //   throw new Error('Unexpected output from `yarn cedar info`')
+      // }
+
+      // Continue testing `yarn cedar <cmd>` by running `yarn cedar test`
+      // const test = await exec(
+      //   'yarn cedar test @my-org/validators',
+      //   [],
+      //   getExecaOptions(OUTPUT_PROJECT_PATH),
+      // )
+
+      // Validate that only the tests for this package ran
+      // Verify that all tests passed
+      // TODO: Implement functionality according to the comment above
+
+      // The package we've generated (@my-org/validators) is used in the test
+      // project on both the web and the api side and is further tested by our
+      // playwright tests that trigger the files that import the package.
+    },
+  })
+
+  await tuiTask({
+    step: 11,
     title: 'Running prisma migrate reset',
     task: () => {
       return exec(
@@ -509,7 +628,7 @@ async function runCommand() {
   })
 
   await tuiTask({
-    step: 11,
+    step: 12,
     title: 'Lint --fix all the things',
     task: async () => {
       try {
@@ -540,7 +659,7 @@ async function runCommand() {
   })
 
   await tuiTask({
-    step: 12,
+    step: 13,
     title: 'Replace and Cleanup Fixture',
     task: async () => {
       // @TODO: This only works on UNIX, we should use path.join everywhere
@@ -567,10 +686,13 @@ async function runCommand() {
       await rimraf(`${OUTPUT_PROJECT_PATH}/.nx`)
       await rimraf(`${OUTPUT_PROJECT_PATH}/tarballs`)
 
-      // Copy over package.json from template, so we remove the extra dev dependencies, and cfw postinstall script
-      // that we added in "Adding framework dependencies to project"
+      // Copy over package.json from template, so we remove the extra dev
+      // dependencies, and cfw postinstall script that we added in "Adding
+      // framework dependencies to project"
       // There's one devDep we actually do want in there though, and that's the
       // prettier plugin for Tailwind CSS
+      // We also want the `packages/*` workspace config that was added when
+      // adding the validators package
       const rootPackageJson = JSON.parse(
         fs.readFileSync(path.join(OUTPUT_PROJECT_PATH, 'package.json'), 'utf8'),
       )
@@ -583,6 +705,7 @@ async function runCommand() {
       )
       newRootPackageJson.devDependencies['prettier-plugin-tailwindcss'] =
         rootPackageJson.devDependencies['prettier-plugin-tailwindcss']
+      newRootPackageJson.workspaces.push('packages/*')
       fs.writeFileSync(
         path.join(OUTPUT_PROJECT_PATH, 'package.json'),
         JSON.stringify(newRootPackageJson, null, 2) + '\n',
@@ -595,7 +718,7 @@ async function runCommand() {
   })
 
   await tuiTask({
-    step: 13,
+    step: 14,
     title: 'All done!',
     task: () => {
       console.log('-'.repeat(30))