diff --git a/.changeset/brave-pandas-smile.md b/.changeset/brave-pandas-smile.md
new file mode 100644
index 0000000..6d5a85e
--- /dev/null
+++ b/.changeset/brave-pandas-smile.md
@@ -0,0 +1,34 @@
+---
+'@dynamic-field-kit/vue': patch
+---
+
+Stop `MultiFieldInput` from pinning the whole package into every consumer
+bundle.
+
+`MultiFieldInput` renders itself recursively for repeatable groups, and reached
+itself through a module-scope `multiFieldInputSelfRef = MultiFieldInput`
+assignment. A bare top-level assignment is a side effect no bundler is allowed
+to drop, so it anchored `MultiFieldInput` → `FieldInput` → `DynamicInput` →
+`getDefaultRenderer` → every default renderer, even in an app that imported none
+of them.
+
+The self-reference is now a hoisted function declaration returning
+`MultiFieldInput`. Its body is not evaluated until a group actually renders, so
+nothing is retained until something uses it. The explicit return type keeps
+TypeScript from having to infer `MultiFieldInput` from inside its own
+initializer, which is what the forward-declared `let` was working around.
+
+Measured with esbuild, minified, `vue` external:
+
+| App imports            | Before   | After            |
+| ---------------------- | -------- | ---------------- |
+| one core helper        | 13,934 B | 2,479 B (−82%)   |
+| `DynamicInput` only    | 13,934 B | 9,196 B (−34%)   |
+| `MultiFieldInput` only | 13,944 B | 13,958 B (+14 B) |
+| everything             | 20,530 B | 20,543 B (+13 B) |
+
+Apps that pull in the whole surface pay 13–14 bytes for the wrapper function,
+which is the honest cost of the change.
+
+No behaviour or type change: `dist/index.d.ts` is byte-identical, and the vue
+suite (115 tests, including the repeatable-group recursion) passes unchanged.
diff --git a/.changeset/clever-donkeys-repeat.md b/.changeset/clever-donkeys-repeat.md
new file mode 100644
index 0000000..35d7575
--- /dev/null
+++ b/.changeset/clever-donkeys-repeat.md
@@ -0,0 +1,32 @@
+---
+'@dynamic-field-kit/angular': patch
+'@dynamic-field-kit/core': patch
+'@dynamic-field-kit/react': patch
+'@dynamic-field-kit/vue': patch
+---
+
+Close the remaining documentation gaps in each package README, so every public
+export is described somewhere. README ships in the npm tarball, so this reaches
+the package pages only through a release.
+
+- **Sync vs async validation** is now spelled out in core, with the consequence
+  that was previously implicit: `validateField` / `validateFields` cannot await,
+  so a `validate` hook returning a Promise is treated as valid on the sync path.
+  `useDynamicForm` and `createDynamicFormStore` validate synchronously
+  (including on submit), so async rules have to run through
+  `validateFieldsAsync` explicitly. Each adapter README repeats the caveat and
+  links to the core section.
+- Document `validateFieldAsync`, `validateFieldsAsync`, `resolveOptions` and
+  `validators` in the react, vue and angular export lists, separated from each
+  adapter's own exports so it is clear they are core re-exports.
+- Document the core types that appear in every signature but had no definition
+  in the README: `Properties`, `ValidatorFn`, `FieldValidatorResult`,
+  `FieldValidatorFunction`, and `FormStep` alongside `WizardState`.
+- Angular: document `layoutRegistry` / `LayoutRegistry`, the `ColumnLayout` /
+  `RowLayout` / `GridLayout` components and `BaseInputComponent`, with a custom
+  layout example. Its layout registry holds standalone components rather than
+  render functions, which is the one place the three adapters genuinely differ,
+  and it was the only adapter not documenting its registry at all.
+- Rename angular's `## What it exports` to `## Exports` to match react and vue.
+- Link the demo sub-routes: react's enterprise-features and wizard pages, and
+  from core the per-framework demos plus the wizard it documents.
diff --git a/.changeset/olive-pumas-shave.md b/.changeset/olive-pumas-shave.md
new file mode 100644
index 0000000..959908e
--- /dev/null
+++ b/.changeset/olive-pumas-shave.md
@@ -0,0 +1,35 @@
+---
+'@dynamic-field-kit/core': patch
+'@dynamic-field-kit/react': patch
+'@dynamic-field-kit/vue': patch
+---
+
+Let consumer bundlers drop the parts of the adapters an app does not use.
+
+Components were declared as bare top-level calls — `defineComponent({...})` in
+vue, `React.memo(...)` in react. A bundler cannot prove such a call is
+side-effect free, so it has to evaluate it even when the result is unused, which
+kept every default renderer and every component in an app's bundle no matter how
+little of the package it imported. Marking those calls `/* @__PURE__ */` makes
+them droppable. Measured with esbuild, minified, framework external:
+
+| App imports                | Before   | After           |
+| -------------------------- | -------- | --------------- |
+| react: one core helper     | 11,149 B | 3,258 B (−71%)  |
+| react: `DynamicInput` only | 11,150 B | 6,830 B (−39%)  |
+| react: everything          | 17,601 B | unchanged       |
+| vue: one core helper       | 17,379 B | 13,934 B (−20%) |
+| vue: `DynamicInput` only   | 17,379 B | 13,934 B (−20%) |
+| vue: everything            | 20,530 B | unchanged       |
+
+Apps that use the whole surface are unchanged, which is the expected result —
+there is nothing to drop. The shipped `dist` grows slightly (react +0.03 KB, vue
++0.29 KB) because the annotations are comments in the bundle; the trade is a
+bigger published file for a smaller consumer bundle.
+
+`@dynamic-field-kit/core` now declares `"sideEffects": false`. It has no
+top-level execution at all — the only module-scope work is `new FieldRegistry()`
+assigned to an export — so the claim is accurate, and it lets bundlers that rely
+on the flag rather than their own analysis skip core entirely when it is unused.
+The adapters deliberately do not set it: their entry side-effect-imports the
+default layouts in order to register them.
diff --git a/.changeset/shiny-otters-repeat.md b/.changeset/shiny-otters-repeat.md
new file mode 100644
index 0000000..14441bd
--- /dev/null
+++ b/.changeset/shiny-otters-repeat.md
@@ -0,0 +1,30 @@
+---
+'@dynamic-field-kit/core': patch
+'@dynamic-field-kit/react': patch
+'@dynamic-field-kit/vue': patch
+---
+
+Stop publishing sourcemaps, roughly halving what each package installs.
+
+tsup was emitting sourcemaps with `sourcesContent`, so every `.map` carried a
+full copy of the TypeScript source. That is what made them work at all — `files`
+only publishes `dist`, so a map referencing `../src/*.ts` would otherwise
+resolve to nothing — but it also made them about half of each tarball, shipped
+to every consumer on every install.
+
+| Package | Unpacked                | Tarball               | Files |
+| ------- | ----------------------- | --------------------- | ----- |
+| core    | 157.0 → 83.0 KB (−47%)  | 33.3 → 17.5 KB (−47%) | 8 → 6 |
+| react   | 207.6 → 90.1 KB (−57%)  | 46.8 → 19.2 KB (−59%) | 8 → 6 |
+| vue     | 250.4 → 109.4 KB (−56%) | 47.6 → 20.5 KB (−57%) | 8 → 6 |
+
+Nothing that ends up in an application bundle changes — sourcemaps never do.
+What changes is install size, and the ability to step into the library's
+TypeScript source while debugging a consuming app.
+
+This is a deliberate trade, not a free win: the maps worked. Each package's
+`tsup.config.ts` carries the reasoning next to a `sourcemap: false` that is one
+word away from restoring them.
+
+`@dynamic-field-kit/angular` is unaffected; ng-packagr's published output does
+not carry them.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f8dc2b0..97e73ad 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,13 +23,13 @@ jobs:
       github.event_name == 'pull_request' &&
       !startsWith(github.head_ref, 'changeset-release/')
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           # changeset status diffs against the base branch, so it needs history.
           fetch-depth: 0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml
index 0f38d8b..8d9bb07 100644
--- a/.github/workflows/deploy-pages.yml
+++ b/.github/workflows/deploy-pages.yml
@@ -31,10 +31,10 @@ jobs:
       # prefixed or they 404.
       SITE_BASE: /${{ github.event.repository.name }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
@@ -86,7 +86,7 @@ jobs:
           find _site -maxdepth 2 -name index.html
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v5
         with:
           path: _site
 
@@ -99,4 +99,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5
diff --git a/.github/workflows/quality-gates.yml b/.github/workflows/quality-gates.yml
index f937858..9ab69a8 100644
--- a/.github/workflows/quality-gates.yml
+++ b/.github/workflows/quality-gates.yml
@@ -9,10 +9,10 @@ jobs:
   lint-and-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
@@ -38,7 +38,7 @@ jobs:
       # Common ancestor of the four paths is `packages`, so the artifact stores
       # `<pkg>/dist/...`.
       - name: Upload built dist
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: package-dist
           path: |
@@ -55,6 +55,11 @@ jobs:
       - name: Type tests
         run: npm run test:types --workspace=@dynamic-field-kit/core
 
+      # Runs after the build so the suite's "every package reports a size"
+      # assertion has a dist to look at.
+      - name: Test build scripts
+        run: npm run test:scripts
+
       - name: Show bundle sizes
         run: node scripts/show-sizes.js
 
@@ -85,10 +90,10 @@ jobs:
             coverage-file: packages/angular/coverage/lcov.info
             coverage-name: angular
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
@@ -105,7 +110,7 @@ jobs:
 
       - name: Upload coverage
         if: matrix.coverage-file != '' && success()
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v7
         with:
           files: ${{ matrix.coverage-file }}
           flags: unittests
@@ -121,10 +126,10 @@ jobs:
       matrix:
         app: [react-app, vue-app, angular-app]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
@@ -132,7 +137,7 @@ jobs:
       # The example apps depend on the packages via `file:` paths, so the dist
       # has to exist before their install resolves them.
       - name: Download built dist
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: package-dist
           path: packages
@@ -160,10 +165,10 @@ jobs:
     runs-on: ubuntu-latest
     needs: [lint-and-build, test]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
@@ -174,7 +179,7 @@ jobs:
       # Reuse the dist built by lint-and-build instead of rebuilding all four
       # packages. Extract into `packages/` so paths become packages/<pkg>/dist.
       - name: Download built dist
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: package-dist
           path: packages
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 741cfe6..5948442 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -53,13 +53,13 @@ jobs:
     needs: [gates]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           ref: ${{ github.ref_name }}
           fetch-depth: 0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'
diff --git a/.gitignore b/.gitignore
index 6cc2f4c..3e603fe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,9 @@ node_modules/
 packages/*/dist
 dist/
 
+# vite's transient config bundle, left behind when a vitest run is interrupted
+*.timestamp-*.mjs
+
 # test coverage
 packages/*/coverage
 coverage/
diff --git a/.prettierignore b/.prettierignore
index 7ea4d6b..c2a57a0 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -7,6 +7,12 @@ build/
 out/
 coverage/
 
+# vite's transient config bundle, left behind when a vitest run is interrupted.
+# Must stay ignored here as well as in .gitignore: `prettier --check .` walks
+# untracked files too, so an orphaned one fails format-check after a local
+# `npm run test --workspace=@dynamic-field-kit/angular`.
+*.timestamp-*.mjs
+
 # Framework caches
 .angular/
 .next/
diff --git a/example/react-app/app/layout.tsx b/example/react-app/app/layout.tsx
index 8da647e..833365f 100644
--- a/example/react-app/app/layout.tsx
+++ b/example/react-app/app/layout.tsx
@@ -13,8 +13,9 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata: Metadata = {
-  title: 'Create Next App',
-  description: 'Generated by create next app',
+  title: 'Dynamic Field Kit - React Example',
+  description:
+    'Schema-driven forms rendered by @dynamic-field-kit/react: renderer registry, layouts, conditional fields, repeatable groups, form state and a multi-step wizard.',
 };
 
 export default function RootLayout({
diff --git a/example/vue-app/index.html b/example/vue-app/index.html
index 0011a17..c0468dc 100644
--- a/example/vue-app/index.html
+++ b/example/vue-app/index.html
@@ -4,7 +4,11 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>vue-app</title>
+    <title>Dynamic Field Kit - Vue Example</title>
+    <meta
+      name="description"
+      content="Schema-driven forms rendered by @dynamic-field-kit/vue: renderer registry, layouts, conditional fields, repeatable groups and form state."
+    />
   </head>
   <body>
     <div id="app"></div>
diff --git a/package-lock.json b/package-lock.json
index 32be7b4..370a80d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,16 +12,12 @@
       "dependencies": {
         "@dynamic-field-kit/core": "workspace:*",
         "@dynamic-field-kit/react": "workspace:*",
-        "@dynamic-field-kit/vue": "workspace:*",
-        "react": "^19.2.4",
-        "react-dom": "^19.2.4",
-        "vue": "^3.5.32"
+        "@dynamic-field-kit/vue": "workspace:*"
       },
       "devDependencies": {
         "@changesets/cli": "^2.31.1",
         "@commitlint/cli": "^21.2.1",
         "@commitlint/config-conventional": "^21.2.0",
-        "@types/react": "^19.2.8",
         "@typescript-eslint/eslint-plugin": "^5.60.0",
         "@typescript-eslint/parser": "^5.60.0",
         "eslint": "^8.44.0",
@@ -65,7 +61,6 @@
       "integrity": "sha512-I2YW4Zn1818toEGKPPcbv8qqglegNnWT4A4GM28LPRg4rOYwPkZzy3PAB7EIJEwZIDQgz2I+Oy0pc56BWcFVUw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@angular-devkit/core": "19.2.27",
         "rxjs": "7.8.1"
@@ -99,7 +94,6 @@
       "integrity": "sha512-63dLzZeRAZiDOWegZHDG1L3Su4m7tfh2n4uV4fXhJYQeyblAQIrmz/dsyjn2cwR021neDbteLCn7MeysKj47/g==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@ampproject/remapping": "2.3.0",
         "@angular-devkit/architect": "0.1902.27",
@@ -1098,7 +1092,6 @@
       "integrity": "sha512-kMcuTUxDcnTa+JF9SaxdY+b6pkGjtefxGp/VYblSbvlzQ1rVX4wH4V9LHHyXsTOxRRNGqRJ01g0Enhq1iA19mQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@ampproject/remapping": "2.3.0",
         "@angular-devkit/architect": "0.1902.27",
@@ -2138,7 +2131,6 @@
       "integrity": "sha512-3ToiC1xZ1Y8aU7+CkgCI/tqyuPXEmYGJXO7H4uqp0xkLXUqp88rQQ4j1HmP37xSJLbCJPaIiv+cT1y+grssrww==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "chokidar": "^4.0.0",
         "immutable": "^5.0.2",
@@ -2755,7 +2747,6 @@
       "integrity": "sha512-1M3W3FjUUbVKXDMs+yQpBhnkD/pCe0Jn79rPE5W+EGWWxFoLSyGX+fhnRO5m4c9k66p3nvYrikWQ0ZzMv3M5tw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "tslib": "^2.3.0"
       },
@@ -2780,7 +2771,6 @@
       "integrity": "sha512-LvjE8W58EACgTFaAoqmNe7FRsbvoQ0GvCB/rmm6AEMWx/0W/JBvWkQTrOQlwpoeYOHcMZRGdmPcZoUDwU3JySQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "tslib": "^2.3.0"
       },
@@ -2794,7 +2784,6 @@
       "integrity": "sha512-tYYQk8AUz2sEkVl0a3uebduDUXPuKiGEKl2Jryrbn0xh9i1EsxoCjt1VvHnGnksGp3mz4DQihFVEnte0KeVQ5g==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/core": "7.26.9",
         "@jridgewell/sourcemap-codec": "^1.4.14",
@@ -2845,7 +2834,6 @@
       "integrity": "sha512-pxzQh8ouqfE57lJlXjIzXFuRETwkfMVwS+NFCfv2yh01Qtx+vymO8ZClcJMgLPfBYinhBYX+hrRYVSa1nzlkRQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "tslib": "^2.3.0"
       },
@@ -2896,7 +2884,6 @@
       "integrity": "sha512-O9ZoQKILPC1T2c64OASS75XlOLBxY81m5AAgsBKhwiFWq+V28RsO0cnwpi1YSh/z4ryH8Fe7IUFz8jGrsJi3hQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "tslib": "^2.3.0"
       },
@@ -2992,7 +2979,6 @@
       "integrity": "sha512-lWBYIrF7qK5+GjY5Uy+/hEgp8OJWOD/rpy74GplYRhEauvbHDeFB8t5hPOZxCZ0Oxf4Cc36tK51/l3ymJysrKw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@ampproject/remapping": "^2.2.0",
         "@babel/code-frame": "^7.26.2",
@@ -3377,6 +3363,7 @@
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
       "integrity": "sha512-Pb5ijPrZ89GDH8223L4UP8i6QApWxs04RbPQJTeWDV0/keR2E36MeKnyr6LYmUUvqRRI+Iv87SuF1W6ErINzYw==",
+      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6.9.0"
@@ -3386,6 +3373,7 @@
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
       "integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
+      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6.9.0"
@@ -3434,6 +3422,7 @@
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.29.7.tgz",
       "integrity": "sha512-hnORnjP/1P/zFEndoeX+n+t1RwWRJiJpM/jO7FW32Kn9r5+sJB2JWOdYo4L6k78j15eCwY3Gm/7364B1EMwtNg==",
+      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@babel/types": "^7.29.7"
@@ -4676,6 +4665,7 @@
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.7.tgz",
       "integrity": "sha512-4zBIxpPzowiZpusoFkyGVwakdRJUyuH5PxQ/PrqghfdFWWasvnCdPfQXHrenDai+gyLARulZjZowCOj6fjT4pA==",
+      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@babel/helper-string-parser": "^7.29.7",
@@ -5525,7 +5515,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=18"
       },
@@ -5549,7 +5538,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -6421,6 +6409,7 @@
       "version": "1.5.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
       "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/@jridgewell/trace-mapping": {
@@ -7636,6 +7625,7 @@
       "os": [
         "android"
       ],
+      "peer": true,
       "engines": {
         "node": ">= 10.0.0"
       },
@@ -7657,6 +7647,7 @@
       "os": [
         "darwin"
       ],
+      "peer": true,
       "engines": {
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         "esbuild": "^0.21.3",
         "postcss": "^8.4.43",
@@ -21490,7 +21489,6 @@
       "integrity": "sha512-Ljb1cnSJSivGN0LqXd/zmDbWEM0RNNg2t1QW/XUhYl/qPqyu7CsqeWtqQXHVaJsecLPuDoak2oJcZN2QoRIOag==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@vitest/expect": "1.6.1",
         "@vitest/runner": "1.6.1",
@@ -21562,8 +21560,8 @@
       "version": "3.5.32",
       "resolved": "https://registry.npmjs.org/vue/-/vue-3.5.32.tgz",
       "integrity": "sha512-vM4z4Q9tTafVfMAK7IVzmxg34rSzTFMyIe0UUEijUCkn9+23lj0WRfA83dg7eQZIUlgOSGrkViIaCfqSAUXsMw==",
+      "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@vue/compiler-dom": "3.5.32",
         "@vue/compiler-sfc": "3.5.32",
@@ -21658,7 +21656,6 @@
       "integrity": "sha512-gX/dMkRQc7QOMzgTe6KsYFM7DxeIONQSui1s0n/0xht36HvrgbxtM1xBlgx596NbpHuQU8P7QpKwrZYwUX48nw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@types/eslint-scope": "^3.7.7",
         "@types/estree": "^1.0.8",
@@ -21738,7 +21735,6 @@
       "integrity": "sha512-QcQ72gh8a+7JO63TAx/6XZf/CWhgMzu5m0QirvPfGvptOusAxG12w2+aua1Jkjr7hzaWDnJ2n6JFeexMHI+Zjg==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@types/bonjour": "^3.5.13",
         "@types/connect-history-api-fallback": "^1.5.4",
@@ -22424,8 +22420,7 @@
       "resolved": "https://registry.npmjs.org/zone.js/-/zone.js-0.15.1.tgz",
       "integrity": "sha512-XE96n56IQpJM7NAoXswY3XRLcWFW83xe0BiAOeMD7K5k5xecOeul3Qcpx6GqEeeHNkW5DWL5zOyTbEfB4eti8w==",
       "dev": true,
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
     },
     "packages/angular": {
       "name": "@dynamic-field-kit/angular",
@@ -22466,7 +22461,6 @@
       "integrity": "sha512-FhgT3MwDIXu8vzrQHFlQnwAOFENQY8FlIHkQf4WnJc6km4L0uUqQnm7iQPmX5z6dFFDTIsPDwHRDc73CoUaNVA==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "ts-morph": "^21.0.0",
         "vfile": "^6.0.3"
@@ -23168,7 +23162,6 @@
       "integrity": "sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -23477,7 +23470,6 @@
       "integrity": "sha512-+5CALsOvbNKnS+ZHMXtuUC7nL8/7F1F2DnHGjSsszX8zCjWSSviphCb/NuS9Nzf4Q03KyyDRBAXhF/8lffME4Q==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@types/chai": "^4.3.5",
         "@types/chai-subset": "^1.3.3",
@@ -23573,6 +23565,7 @@
         "@testing-library/jest-dom": "^6.4.0",
         "@testing-library/react": "^16.0.0",
         "@testing-library/user-event": "^14.5.0",
+        "@types/react": "^19.2.8",
         "@vitejs/plugin-react": "^4.2.0",
         "@vitest/coverage-v8": "^1.6.0",
         "jsdom": "^24.0.0",
@@ -23598,7 +23591,8 @@
         "@vue/test-utils": "^2.4.6",
         "jsdom": "^24.0.0",
         "tsup": "^8.0.1",
-        "vitest": "^1.6.0"
+        "vitest": "^1.6.0",
+        "vue": "^3.5.32"
       },
       "peerDependencies": {
         "@dynamic-field-kit/core": "^1.3.0",
diff --git a/package.json b/package.json
index 2aafb23..872c27e 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,8 @@
     "build:changed": "node scripts/build-changed.js",
     "dev": "npm run dev --workspaces",
     "test": "npm run test --workspaces --if-present",
-    "lint": "eslint packages/core/src packages/react/src packages/vue/src packages/angular/src --ext .ts,.tsx,.js --ignore-path .eslintignore",
+    "test:scripts": "vitest run",
+    "lint": "eslint packages/core/src packages/react/src packages/vue/src packages/angular/src scripts --ext .ts,.tsx,.js --ignore-path .eslintignore",
     "lint:cross-framework": "node scripts/check-cross-framework-imports.js",
     "verify-framework-deps": "node scripts/verify-framework-deps.js",
     "lint:fix": "eslint . --ext .ts,.tsx,.js --fix",
@@ -28,7 +29,6 @@
     "@changesets/cli": "^2.31.1",
     "@commitlint/cli": "^21.2.1",
     "@commitlint/config-conventional": "^21.2.0",
-    "@types/react": "^19.2.8",
     "@typescript-eslint/eslint-plugin": "^5.60.0",
     "@typescript-eslint/parser": "^5.60.0",
     "eslint": "^8.44.0",
@@ -44,13 +44,15 @@
     "typescript": "~5.5.0",
     "vitest": "^1.6.0"
   },
+  "//dependencies": "the root is private and ships nothing, so it declares no runtime dependencies. react/react-dom/vue/@types/react used to sit here for the packages to borrow; each package now declares its own (enforced by scripts/verify-framework-deps.js), which is also what keeps `npm audit --omit=dev` from failing on advisories in a build-time tree, e.g. vue -> @vue/compiler-sfc -> postcss -> nanoid.",
   "dependencies": {
     "@dynamic-field-kit/core": "workspace:*",
     "@dynamic-field-kit/react": "workspace:*",
-    "@dynamic-field-kit/vue": "workspace:*",
-    "react": "^19.2.4",
-    "react-dom": "^19.2.4",
-    "vue": "^3.5.32"
+    "@dynamic-field-kit/vue": "workspace:*"
+  },
+  "//overrides": "nanoid <3.3.18 is GHSA-2v37-7h3g-55p8. It reaches us only through vue -> @vue/compiler-sfc -> postcss (build-time), but pin it forward so the toolchain we actually run is patched, not merely excluded from the audit.",
+  "overrides": {
+    "nanoid": "^3.3.18"
   },
   "//lint-staged": "globs must stay a superset of what `prettier --check .` sees, or a file can pass pre-commit and fail CI format-check. eslint only runs on the extensions the lint script targets.",
   "lint-staged": {
diff --git a/packages/angular/README.md b/packages/angular/README.md
index c47711a..ebe487f 100644
--- a/packages/angular/README.md
+++ b/packages/angular/README.md
@@ -4,7 +4,9 @@ Angular adapter for `@dynamic-field-kit/core`.
 
 This package provides Angular components and a convenience module that render field schemas defined with `@dynamic-field-kit/core`.
 
-Live demo: https://vannt-dev.github.io/dynamic-field-kit/angular/
+Live demo: https://vannt-dev.github.io/dynamic-field-kit/angular/ — tabs for the
+basic schema, the enterprise features (`createDynamicFormStore`, HTML5 renderers,
+blur wiring, DevTools) and the multi-step wizard.
 
 ## Install
 
@@ -20,7 +22,7 @@ If you need to pin versions explicitly:
 npm install @dynamic-field-kit/core@^1.0.12 @dynamic-field-kit/angular@^1.2.3
 ```
 
-## What it exports
+## Exports
 
 - `DynamicInput`
 - `FieldInput`
@@ -29,9 +31,27 @@ npm install @dynamic-field-kit/core@^1.0.12 @dynamic-field-kit/angular@^1.2.3
 - `fieldRegistry`
 - `FieldRegistry` (class, for scoped registries)
 - `FIELD_REGISTRY` (injection token)
-- `validateField` / `validateFields` / `resolveDisabled` / `resolveReadOnly` / `ValidationResult`
 - `createDynamicFormStore` (signal-based form state)
 - `DynamicFormDevToolsComponent`
+- `layoutRegistry` / `LayoutRegistry` (class, for a scoped layout registry)
+- `ColumnLayout` / `RowLayout` / `GridLayout` (the standalone layout components, registered for you)
+- `BaseInputComponent` — the abstract base your custom renderers extend
+
+Re-exported from `@dynamic-field-kit/core` so a consumer app rarely has to import
+both packages:
+
+- `validateField` / `validateFieldAsync` — one field, returns `string[]`
+- `validateFields` / `validateFieldsAsync` — a whole schema, returns `ValidationResult`
+- `resolveDisabled` / `resolveReadOnly` / `resolveOptions` — resolve a field's dynamic conditions and options
+- `validators` — the built-in validator helpers (`required`, `email`, `minLength`, `compose`, …)
+- `ValidationResult`
+
+`createDynamicFormStore` validates **synchronously** via `validateFields`,
+including on submit. Fields whose `validate` hook returns a Promise are treated
+as valid on that path, so run async rules through `validateFieldsAsync`
+yourself. See the
+[core README](https://github.com/vannt-dev/dynamic-field-kit/tree/develop/packages/core#sync-vs-async-validation)
+for the full rules.
 
 ## Basic setup (Angular 19+)
 
@@ -194,6 +214,29 @@ fields in error.
 ></dfk-multi-field-input>
 ```
 
+Those four names resolve through `layoutRegistry`, which holds standalone
+components rather than render functions — the Angular equivalent of the React
+and Vue layout registries. `ColumnLayout`, `RowLayout` and `GridLayout` are
+registered for you when you import the package root; register your own the same
+way:
+
+```ts
+import { Component } from '@angular/core';
+import { layoutRegistry } from '@dynamic-field-kit/angular';
+
+@Component({
+  standalone: true,
+  selector: 'app-stack-tight',
+  template: `<div style="display: grid; gap: 8px"><ng-content /></div>`,
+})
+export class StackTightLayout {}
+
+layoutRegistry.register('stack-tight', StackTightLayout);
+```
+
+`LayoutRegistry` is the class behind that singleton, for when you want an
+isolated set of layouts instead of the shared one.
+
 ## Derived fields with `computeValue`
 
 Give a field a `computeValue` to derive its value from the rest of the form data whenever any field changes:
diff --git a/packages/angular/test/DynamicFormDevTools.spec.ts b/packages/angular/test/DynamicFormDevTools.spec.ts
index e9f20b8..4e16fc2 100644
--- a/packages/angular/test/DynamicFormDevTools.spec.ts
+++ b/packages/angular/test/DynamicFormDevTools.spec.ts
@@ -73,6 +73,22 @@ describe('DynamicFormDevToolsComponent', () => {
     expect(badge?.textContent?.trim()).toBe('2');
   });
 
+  it('survives a null errors input instead of throwing', () => {
+    // `errors` defaults to {}, but a form store that has not validated yet can
+    // hand down null. errorCount() guards with `this.errors || {}`; without it
+    // the overlay would throw on Object.keys(null) and take the host app's
+    // render down with it.
+    fixture.componentRef.setInput('errors', null);
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.errorCount()).toBe(0);
+    expect(
+      (fixture.nativeElement as HTMLElement).querySelector(
+        '.dfk-devtools-badge'
+      )
+    ).toBeNull();
+  });
+
   it('shows the error count in the errors tab label', () => {
     fixture.componentInstance.errors = { name: ['required'] };
     open(fixture);
diff --git a/packages/angular/test/FieldInput.spec.ts b/packages/angular/test/FieldInput.spec.ts
index d7b56b2..10276c2 100644
--- a/packages/angular/test/FieldInput.spec.ts
+++ b/packages/angular/test/FieldInput.spec.ts
@@ -1,4 +1,5 @@
-import { ChangeDetectorRef } from '@angular/core';
+import { NgFor } from '@angular/common';
+import { ChangeDetectorRef, Component, Input } from '@angular/core';
 import { TestBed } from '@angular/core/testing';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { BaseInputComponent } from '../src/components/BaseInput';
@@ -10,6 +11,23 @@ import {
   TextRendererComponent,
 } from './helpers/renderers';
 
+/**
+ * Renders whatever `options` it is handed, so the tests below can assert on
+ * what actually reached the renderer instead of reading FieldInput's getter.
+ * `.opt` absent means the renderer received no options at all.
+ */
+@Component({
+  selector: 'dfk-test-options',
+  standalone: true,
+  imports: [NgFor],
+  template: `<span class="opt" *ngFor="let o of options">{{
+    $any(o).label
+  }}</span>`,
+})
+class OptionsRendererComponent {
+  @Input() options?: Record<string, unknown>[];
+}
+
 describe('FieldInput', () => {
   let registry: ReturnType<typeof makeRegistry>;
 
@@ -132,6 +150,84 @@ describe('FieldInput', () => {
   });
 });
 
+describe('FieldInput option resolution', () => {
+  let registry: ReturnType<typeof makeRegistry>;
+
+  function mount(inputs: Record<string, unknown>) {
+    const fixture = TestBed.createComponent(FieldInput);
+    for (const [key, value] of Object.entries(inputs)) {
+      fixture.componentRef.setInput(key, value);
+    }
+    fixture.detectChanges();
+    return fixture;
+  }
+
+  function renderedOptions(fixture: { nativeElement: HTMLElement }): string[] {
+    return Array.from(fixture.nativeElement.querySelectorAll('.opt')).map((n) =>
+      (n.textContent || '').trim()
+    );
+  }
+
+  beforeEach(() => {
+    registry = makeRegistry();
+    registry.register('select', OptionsRendererComponent as never);
+    TestBed.configureTestingModule({
+      imports: [FieldInput],
+      providers: [{ provide: FIELD_REGISTRY, useValue: registry }],
+    });
+  });
+
+  it("prefers the explicit options input over the field's own options", () => {
+    // MultiFieldInput resolves options against the live form data and passes
+    // the result down, so the input has to win over whatever the schema says.
+    const fixture = mount({
+      fieldDescription: {
+        name: 'city',
+        type: 'select',
+        options: [{ label: 'from schema' }],
+      },
+      options: [{ label: 'from parent' }],
+    });
+
+    expect(renderedOptions(fixture)).toEqual(['from parent']);
+  });
+
+  it('passes a static options array from the field description straight down', () => {
+    const fixture = mount({
+      fieldDescription: {
+        name: 'city',
+        type: 'select',
+        options: [{ label: 'Hanoi' }, { label: 'HCM' }],
+      },
+    });
+
+    expect(renderedOptions(fixture)).toEqual(['Hanoi', 'HCM']);
+  });
+
+  it('withholds a dynamic options callback instead of passing the function down', () => {
+    // A callback needs the form data to resolve, which FieldInput does not
+    // have -- only MultiFieldInput does, and it passes the result via the
+    // `options` input. Handing the raw function to a renderer would make it
+    // try to iterate a function.
+    const resolve = vi.fn(() => [{ label: 'never called here' }]);
+
+    const fixture = mount({
+      fieldDescription: { name: 'city', type: 'select', options: resolve },
+    });
+
+    expect(renderedOptions(fixture)).toEqual([]);
+    expect(resolve).not.toHaveBeenCalled();
+  });
+
+  it('passes nothing when the field declares no options at all', () => {
+    const fixture = mount({
+      fieldDescription: { name: 'city', type: 'select' },
+    });
+
+    expect(renderedOptions(fixture)).toEqual([]);
+  });
+});
+
 describe('BaseInputComponent', () => {
   class TestInput extends BaseInputComponent {}
 
diff --git a/packages/angular/test/MultiFieldInputLayout.spec.ts b/packages/angular/test/MultiFieldInputLayout.spec.ts
new file mode 100644
index 0000000..f96c91e
--- /dev/null
+++ b/packages/angular/test/MultiFieldInputLayout.spec.ts
@@ -0,0 +1,230 @@
+import { TestBed } from '@angular/core/testing';
+import type { FieldDescription } from '@dynamic-field-kit/core';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { MultiFieldInput } from '../src/components/MultiFieldInput';
+import { FIELD_REGISTRY } from '../src/fieldRegistryToken';
+import { makeRegistry, TextRendererComponent } from './helpers/renderers';
+
+const FIELDS: FieldDescription[] = [
+  { name: 'first', type: 'text' },
+  { name: 'second', type: 'text' },
+];
+
+/**
+ * Installs a matchMedia stub that reports "mobile" for the given viewport
+ * width, and records every media query the component asks about so a test can
+ * assert on the breakpoint it derived. jsdom ships no matchMedia at all, which
+ * is why the component's own `typeof window.matchMedia === 'function'` guard
+ * exists.
+ */
+function stubMatchMedia(viewportWidth: number) {
+  const queries: string[] = [];
+  const stub = vi.fn((query: string) => {
+    queries.push(query);
+    const max = Number(/max-width:\s*(\d+)px/.exec(query)?.[1] ?? NaN);
+    return { matches: viewportWidth <= max } as MediaQueryList;
+  });
+  (window as unknown as { matchMedia: unknown }).matchMedia = stub;
+  return queries;
+}
+
+describe('MultiFieldInput responsive layout', () => {
+  let registry: ReturnType<typeof makeRegistry>;
+
+  beforeEach(() => {
+    registry = makeRegistry();
+    registry.register('text', TextRendererComponent as never);
+    TestBed.configureTestingModule({
+      imports: [MultiFieldInput],
+      providers: [{ provide: FIELD_REGISTRY, useValue: registry }],
+    });
+  });
+
+  afterEach(() => {
+    delete (window as unknown as { matchMedia?: unknown }).matchMedia;
+  });
+
+  function mount(layout: unknown) {
+    const fixture = TestBed.createComponent(MultiFieldInput);
+    fixture.componentRef.setInput('fieldDescriptions', FIELDS);
+    fixture.componentRef.setInput('properties', {});
+    fixture.componentRef.setInput('layout', layout);
+    fixture.detectChanges();
+    return fixture;
+  }
+
+  const RESPONSIVE = {
+    type: 'responsive',
+    mobile: 'column',
+    desktop: { type: 'grid', columns: 3, gap: 16 },
+  };
+
+  it('resolves to the desktop layout above the breakpoint', () => {
+    stubMatchMedia(1280);
+
+    const fixture = mount(RESPONSIVE);
+
+    expect(fixture.componentInstance.resolvedLayoutType).toBe('grid');
+    expect(fixture.componentInstance.columns).toBe(3);
+    expect(fixture.componentInstance.gap).toBe(16);
+  });
+
+  it('resolves to the mobile layout below the breakpoint', () => {
+    stubMatchMedia(375);
+
+    const fixture = mount(RESPONSIVE);
+
+    expect(fixture.componentInstance.resolvedLayoutType).toBe('column');
+  });
+
+  it('honours a custom breakpoint, querying one pixel below it', () => {
+    // The component asks for `max-width: <breakpoint - 1>px`, so a viewport
+    // exactly at the breakpoint counts as desktop rather than mobile.
+    const queries = stubMatchMedia(900);
+
+    const fixture = mount({ ...RESPONSIVE, breakpoint: 900 });
+
+    expect(queries).toContain('(max-width: 899px)');
+    expect(fixture.componentInstance.resolvedLayoutType).toBe('grid');
+  });
+
+  it('falls back to the default breakpoint when none is given', () => {
+    const queries = stubMatchMedia(1280);
+
+    mount(RESPONSIVE);
+
+    expect(queries).toEqual([expect.stringMatching(/^\(max-width: \d+px\)$/)]);
+    expect(queries).not.toContain('(max-width: 899px)');
+  });
+
+  it('re-renders on resize only when the mobile state actually flips', () => {
+    stubMatchMedia(1280);
+    const fixture = mount(RESPONSIVE);
+    const cdr = (
+      fixture.componentInstance as unknown as {
+        cdr: { markForCheck: () => void };
+      }
+    ).cdr;
+    const markForCheck = vi.spyOn(cdr, 'markForCheck');
+
+    // Still desktop: nothing changed, so no work should be scheduled.
+    fixture.componentInstance.onWindowResize();
+    expect(markForCheck).not.toHaveBeenCalled();
+
+    // Crossing the breakpoint is the case that must schedule a re-render.
+    stubMatchMedia(375);
+    fixture.componentInstance.onWindowResize();
+    expect(markForCheck).toHaveBeenCalledTimes(1);
+    expect(fixture.componentInstance.resolvedLayoutType).toBe('column');
+  });
+
+  it('treats the layout as desktop when the environment has no matchMedia', () => {
+    // jsdom without the stub: the guard has to keep the component usable
+    // rather than throwing on `window.matchMedia(...)`.
+    delete (window as unknown as { matchMedia?: unknown }).matchMedia;
+
+    const fixture = mount(RESPONSIVE);
+
+    expect(fixture.componentInstance.resolvedLayoutType).toBe('grid');
+  });
+});
+
+describe('MultiFieldInput layout defaults', () => {
+  let registry: ReturnType<typeof makeRegistry>;
+
+  beforeEach(() => {
+    registry = makeRegistry();
+    registry.register('text', TextRendererComponent as never);
+    TestBed.configureTestingModule({
+      imports: [MultiFieldInput],
+      providers: [{ provide: FIELD_REGISTRY, useValue: registry }],
+    });
+  });
+
+  function mount(layout: unknown) {
+    const fixture = TestBed.createComponent(MultiFieldInput);
+    fixture.componentRef.setInput('fieldDescriptions', FIELDS);
+    fixture.componentRef.setInput('properties', {});
+    fixture.componentRef.setInput('layout', layout);
+    fixture.detectChanges();
+    return fixture;
+  }
+
+  it('defaults a grid without an explicit column count to two columns', () => {
+    const fixture = mount({ type: 'grid' });
+
+    expect(fixture.componentInstance.columns).toBe(2);
+  });
+
+  it('defaults the gap when the layout config omits it', () => {
+    const fixture = mount({ type: 'grid', columns: 4 });
+
+    expect(fixture.componentInstance.gap).toBe(12);
+    expect(fixture.componentInstance.columns).toBe(4);
+  });
+
+  it('reports two columns for a non-grid layout', () => {
+    const fixture = mount('column');
+
+    expect(fixture.componentInstance.resolvedLayoutType).toBe('column');
+    expect(fixture.componentInstance.columns).toBe(2);
+  });
+});
+
+describe('MultiFieldInput group bounds', () => {
+  let registry: ReturnType<typeof makeRegistry>;
+
+  beforeEach(() => {
+    registry = makeRegistry();
+    registry.register('text', TextRendererComponent as never);
+    TestBed.configureTestingModule({
+      imports: [MultiFieldInput],
+      providers: [{ provide: FIELD_REGISTRY, useValue: registry }],
+    });
+  });
+
+  function mountGroup(field: FieldDescription, items: unknown) {
+    const fixture = TestBed.createComponent(MultiFieldInput);
+    fixture.componentRef.setInput('fieldDescriptions', [field]);
+    fixture.componentRef.setInput('properties', { [field.name]: items });
+    fixture.detectChanges();
+    return fixture;
+  }
+
+  const GROUP: FieldDescription = {
+    name: 'contacts',
+    type: 'text',
+    fields: [{ name: 'email', type: 'text' }],
+    minItems: 1,
+    maxItems: 2,
+  };
+
+  it('refuses to add past maxItems', () => {
+    const changes: unknown[] = [];
+    const fixture = mountGroup(GROUP, [{ email: 'a' }, { email: 'b' }]);
+    fixture.componentInstance.onChange.subscribe((next) => changes.push(next));
+
+    fixture.componentInstance.onGroupItemAdd(GROUP);
+
+    expect(changes).toEqual([]);
+  });
+
+  it('refuses to remove below minItems', () => {
+    const changes: unknown[] = [];
+    const fixture = mountGroup(GROUP, [{ email: 'a' }]);
+    fixture.componentInstance.onChange.subscribe((next) => changes.push(next));
+
+    fixture.componentInstance.onGroupItemRemove(GROUP, 0);
+
+    expect(changes).toEqual([]);
+  });
+
+  it('treats a non-array group value as empty rather than throwing', () => {
+    // A schema can declare a group whose data has not been initialised yet, or
+    // arrives as a scalar from a stale payload.
+    const fixture = mountGroup(GROUP, 'not-an-array');
+
+    expect(fixture.componentInstance.canRemoveItem(GROUP)).toBe(false);
+    expect(fixture.componentInstance.canAddItem(GROUP)).toBe(true);
+  });
+});
diff --git a/packages/angular/tsconfig.json b/packages/angular/tsconfig.json
index 7b911f8..8379ab2 100644
--- a/packages/angular/tsconfig.json
+++ b/packages/angular/tsconfig.json
@@ -1,13 +1,18 @@
-{
-  "extends": "../../tsconfig.base.json",
-  "compilerOptions": {
-    "composite": false,
-    "declaration": true,
-    "outDir": "dist",
-    "target": "ES2019",
-    "module": "ES2020",
-    "experimentalDecorators": true,
-    "emitDecoratorMetadata": true
-  },
-  "include": ["src/**/*"]
-}
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "composite": false,
+    "declaration": true,
+    "outDir": "dist",
+    // Matches what ng-packagr actually emits: the published fesm2022 bundle
+    // uses ES2022 class fields (`value;` declarations, define semantics). This
+    // said ES2019 for a while, which ng-packagr ignored, so the build shipped
+    // ES2022 while the config claimed otherwise - that mismatch is why
+    // tsconfig.spec.json had to override the target to test what really ships.
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "module": "ES2020",
+    "experimentalDecorators": true
+  },
+  "include": ["src/**/*"]
+}
diff --git a/packages/angular/tsconfig.spec.json b/packages/angular/tsconfig.spec.json
index 602e058..2f60d5b 100644
--- a/packages/angular/tsconfig.spec.json
+++ b/packages/angular/tsconfig.spec.json
@@ -1,9 +1,10 @@
 {
   "extends": "./tsconfig.json",
+  // target/useDefineForClassFields are inherited from tsconfig.json, which now
+  // states the ES2022 emit ng-packagr actually produces. Specs must keep
+  // matching it or they exercise class-field semantics that never ship.
   "compilerOptions": {
-    "outDir": "./out-tsc/spec",
-    "target": "ES2022",
-    "useDefineForClassFields": true
+    "outDir": "./out-tsc/spec"
   },
   "include": ["src/**/*.ts", "test/**/*.ts"]
 }
diff --git a/packages/core/README.md b/packages/core/README.md
index 9323706..50fd64d 100644
--- a/packages/core/README.md
+++ b/packages/core/README.md
@@ -4,7 +4,12 @@ Core types and shared registries for `dynamic-field-kit`.
 
 `@dynamic-field-kit/core` is intentionally framework-agnostic. It does not import React, Vue, or Angular types in its public API. Applications define field schemas in `core`, then register framework-specific renderers through an adapter package such as `@dynamic-field-kit/react`, `@dynamic-field-kit/vue`, or `@dynamic-field-kit/angular`.
 
-Live demo: https://vannt-dev.github.io/dynamic-field-kit/
+Live demo: https://vannt-dev.github.io/dynamic-field-kit/ — the same schema
+rendered by [React](https://vannt-dev.github.io/dynamic-field-kit/react/),
+[Vue](https://vannt-dev.github.io/dynamic-field-kit/vue/) and
+[Angular](https://vannt-dev.github.io/dynamic-field-kit/angular/), including the
+[wizard engine](https://vannt-dev.github.io/dynamic-field-kit/react/wizard/)
+documented below.
 
 ## What this package provides
 
@@ -14,7 +19,7 @@ Live demo: https://vannt-dev.github.io/dynamic-field-kit/
 - `fieldRegistry` as the shared runtime registry instance, plus the `FieldRegistry` class for isolated (scoped) registries
 - Layout config types (`LayoutConfig`, `BaseLayout`, `ResponsiveLayout`, `ColumnLayoutConfig`, `RowLayoutConfig`, `GridLayoutConfig`) - the single source of truth re-exported by every adapter
 - `applyComputedValues` to resolve `computeValue` fields against form data
-- `validateField`, `validateFields`, `resolveDisabled`, `resolveReadOnly` and the `ValidationResult` type for opt-in, app-supplied validation and dynamic disabled/readOnly conditions
+- `validateField` / `validateFieldAsync`, `validateFields` / `validateFieldsAsync`, `resolveDisabled`, `resolveReadOnly`, `resolveOptions` and the `ValidationResult` type for opt-in, app-supplied validation and dynamic disabled/readOnly/options conditions
 - `isFieldGroup`, `createGroupItem`, `canAddGroupItem`, `canRemoveGroupItem` to work with repeatable field groups (`FieldDescription.fields`), plus `moveGroupItem`, `swapGroupItems`, `insertGroupItem` and `focusFirstInvalidField` for driving a group's array yourself
 - `zodValidator`, `yupValidator`, `valibotValidator` / `standardSchemaValidator` to validate with an existing schema library
 - A multi-step wizard state machine: `createWizardState`, `validateStep`, `canGoNext` / `canGoPrev`, `goNext` / `goPrev` / `goToStep`, `markStepCompleted` / `isStepCompleted`
@@ -129,6 +134,39 @@ export interface FieldDescription<T extends FieldTypeKey = FieldTypeKey> {
 }
 ```
 
+The value types that show up throughout that shape, and in every signature in
+this README:
+
+```ts
+// Any form-data object. `data` and `rootData` are always this.
+export type Properties = Record<string, unknown>;
+
+// What `validators.*` helpers return: one message, or undefined when valid.
+export type ValidatorFn = (
+  value: unknown,
+  data?: Properties,
+  rootData?: Properties
+) => string | undefined;
+
+// What a `FieldDescription.validate` hook may return. The Promise arm is what
+// makes a field async-only -- see "Sync vs async validation" below.
+export type FieldValidatorResult =
+  | string
+  | string[]
+  | undefined
+  | Promise<string | string[] | undefined>;
+
+export type FieldValidatorFunction = (
+  value: unknown,
+  data: Properties,
+  rootData?: Properties
+) => FieldValidatorResult;
+```
+
+The schema adapters (`zodValidator` and friends) each return a
+`FieldValidatorFunction`, which is why their result drops straight into
+`validate`.
+
 ## Derived fields with `computeValue`
 
 `computeValue` derives a field's value from the rest of the form data (e.g. a `fullName` computed from `firstName` + `lastName`). It is called as `(data, rootData)` - `rootData` is the top-level form even for fields nested in a group. Every adapter's `MultiFieldInput` re-evaluates it once per change, against the post-change data - it is not re-run to a fixed point, so avoid chaining `computeValue` fields into a cycle, and return a primitive or a stable reference (returning a fresh object/array each call defeats the render-skipping optimisation). In development, `applyComputedValues` warns when a `computeValue` chain does not converge in one pass.
@@ -213,10 +251,43 @@ const fields: FieldDescription[] = [
 
 `validateFields(fields, data, rootData?)` returns `{ valid, errors }`, recursing
 into repeatable groups (keys like `contacts[0].email`) and skipping fields that
-are hidden by `appearCondition` or disabled. Use `validateFieldsAsync(fields, data, rootData?)`
-when fields define async `validate` functions. Adapters call `validateField` /
-`resolveDisabled` / `resolveReadOnly` per field to surface `error`, `disabled`,
-and `readOnly` to renderers reactively.
+are hidden by `appearCondition` or disabled. Adapters call `validateField` /
+`resolveDisabled` / `resolveReadOnly` / `resolveOptions` per field to surface
+`error`, `disabled`, `readOnly` and the resolved `options` to renderers
+reactively.
+
+### Sync vs async validation
+
+`validateField` and `validateFields` are synchronous, and that has a consequence
+worth knowing: **when a `validate` hook returns a Promise, the sync path treats
+the field as valid.** It cannot await, so it discards the pending result rather
+than blocking. Any field whose `validate` is `async` — or whose schema has async
+refinements — must go through the async pair:
+
+```ts
+import {
+  validateField,
+  validateFieldAsync,
+  validateFields,
+  validateFieldsAsync,
+} from '@dynamic-field-kit/core';
+
+// One field. Both always return string[] (empty when valid).
+const errors = validateField(field, value, data, rootData); // string[]
+const errorsAsync = await validateFieldAsync(field, value, data, rootData);
+
+// A whole schema. Both return ValidationResult -> { valid, errors }.
+const result = validateFields(fields, data); // sync hooks only
+const resultAsync = await validateFieldsAsync(fields, data); // awaits each hook
+```
+
+The framework form hooks (`useDynamicForm`, `createDynamicFormStore`) validate
+synchronously, so wire async rules up through `validateFieldsAsync` yourself —
+for example on submit — rather than expecting them to surface on change.
+
+`resolveOptions(field, data, rootData?)` returns `Properties[] | undefined`,
+calling `field.options` when it is a callback and passing it through when it is a
+static array.
 
 ### Schema adapters (Zod, Yup, Valibot / Standard Schema)
 
@@ -288,10 +359,30 @@ if (valid) {
 | `markStepCompleted(state, index?)` | Record a step as done, defaulting to the current one                                |
 | `isStepCompleted(state, index)`    | For rendering a step indicator                                                      |
 
-`WizardState` carries `currentStep`, `currentStepIndex`, `totalSteps`,
-`isFirstStep`, `isLastStep`, `steps` and `completedSteps`. `goNext` does not
-validate — call `validateStep` yourself so a "save draft and come back" flow
-stays possible.
+Each step is a `FormStep`, and `WizardState` is what every helper above takes
+and returns:
+
+```ts
+export interface FormStep {
+  id: string;
+  title: string;
+  description?: string;
+  fields: FieldDescription[];
+}
+
+export interface WizardState {
+  currentStepIndex: number;
+  totalSteps: number;
+  isFirstStep: boolean;
+  isLastStep: boolean;
+  currentStep: FormStep;
+  steps: FormStep[];
+  completedSteps: number[];
+}
+```
+
+`goNext` does not validate — call `validateStep` yourself so a "save draft and
+come back" flow stays possible.
 
 ## Group array helpers
 
diff --git a/packages/core/package.json b/packages/core/package.json
index 478295b..a0e7ab3 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -6,6 +6,8 @@
   "main": "dist/index.js",
   "module": "dist/index.mjs",
   "types": "dist/index.d.ts",
+  "//sideEffects": "core has no top-level execution - the only module-scope work is `new FieldRegistry()` assigned to an export, which is pure. The adapters cannot say this: their entry side-effect-imports the default layouts to register them.",
+  "sideEffects": false,
   "publishConfig": {
     "access": "public"
   },
diff --git a/packages/core/tsup.config.ts b/packages/core/tsup.config.ts
index 7933f0c..4a9f280 100644
--- a/packages/core/tsup.config.ts
+++ b/packages/core/tsup.config.ts
@@ -5,5 +5,9 @@ export default defineConfig({
   format: ['esm', 'cjs'],
   dts: true,
   clean: true,
-  sourcemap: true,
+  // Sourcemaps are not published: tsup inlines the full TS source via
+  // sourcesContent, which made the maps ~48% of the tarball (core: 75.7 KB of
+  // 157 KB unpacked) on every consumer install. Flip back to `sourcemap: true`
+  // if stepping into the library source is worth that.
+  sourcemap: false,
 });
diff --git a/packages/react/README.md b/packages/react/README.md
index a9d845d..56ecddf 100644
--- a/packages/react/README.md
+++ b/packages/react/README.md
@@ -4,7 +4,10 @@ React adapter for `@dynamic-field-kit/core`.
 
 This package provides React components for rendering `FieldDescription[]` and exports a React-typed `fieldRegistry`, so registered renderers can be used directly as JSX components.
 
-Live demo: https://vannt-dev.github.io/dynamic-field-kit/react/
+Live demo: https://vannt-dev.github.io/dynamic-field-kit/react/ — plus
+[enterprise features](https://vannt-dev.github.io/dynamic-field-kit/react/new-features/)
+(`useDynamicForm`, HTML5 renderers, blur wiring, DevTools) and a
+[multi-step wizard](https://vannt-dev.github.io/dynamic-field-kit/react/wizard/).
 
 ## Install
 
@@ -31,9 +34,23 @@ Note: `@dynamic-field-kit/core`, `react`, and `react-dom` are **peer dependencie
 - `FieldTypeKey`
 - `FieldRendererProps`
 - `LayoutConfig`
-- `validateField` / `validateFields` / `resolveDisabled` / `resolveReadOnly` / `ValidationResult`
 - `defaultRenderersMap` / `getDefaultRenderer`
 
+Re-exported from `@dynamic-field-kit/core` so a consumer app rarely has to import
+both packages:
+
+- `validateField` / `validateFieldAsync` — one field, returns `string[]`
+- `validateFields` / `validateFieldsAsync` — a whole schema, returns `ValidationResult`
+- `resolveDisabled` / `resolveReadOnly` / `resolveOptions` — resolve a field's dynamic conditions and options
+- `validators` — the built-in validator helpers (`required`, `email`, `minLength`, `compose`, …)
+- `ValidationResult`
+
+`useDynamicForm` validates **synchronously** via `validateFields`, including on
+submit. Fields whose `validate` hook returns a Promise are treated as valid on
+that path, so run async rules through `validateFieldsAsync` yourself. See the
+[core README](https://github.com/vannt-dev/dynamic-field-kit/tree/develop/packages/core#sync-vs-async-validation)
+for the full rules.
+
 `FieldGroupInput` (repeatable field groups) is used internally by `FieldInput` and doesn't need to be imported directly - see "Repeatable field groups" below.
 
 Default layouts are registered automatically when you import the package root.
diff --git a/packages/react/package.json b/packages/react/package.json
index 8a13084..3f1edee 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -29,6 +29,7 @@
     "@testing-library/jest-dom": "^6.4.0",
     "@testing-library/react": "^16.0.0",
     "@testing-library/user-event": "^14.5.0",
+    "@types/react": "^19.2.8",
     "@vitest/coverage-v8": "^1.6.0",
     "@vitejs/plugin-react": "^4.2.0",
     "jsdom": "^24.0.0",
diff --git a/packages/react/src/components/DynamicInput.tsx b/packages/react/src/components/DynamicInput.tsx
index e74895f..dc7c52e 100644
--- a/packages/react/src/components/DynamicInput.tsx
+++ b/packages/react/src/components/DynamicInput.tsx
@@ -91,7 +91,7 @@ const DynamicInputInner = <T extends FieldTypeKey>({
 // unaffected fields don't re-render every time a sibling field's value changes.
 // React.memo erases the generic signature, so restore it via an `unknown`
 // round-trip (plain `as typeof DynamicInputInner` fails dts generation).
-const DynamicInput = React.memo(
+const DynamicInput = /* @__PURE__ */ React.memo(
   DynamicInputInner
 ) as unknown as typeof DynamicInputInner;
 
diff --git a/packages/react/src/components/FieldInput.tsx b/packages/react/src/components/FieldInput.tsx
index 950713b..949a84a 100644
--- a/packages/react/src/components/FieldInput.tsx
+++ b/packages/react/src/components/FieldInput.tsx
@@ -103,7 +103,7 @@ const FieldInputInner = ({
 // `renderInfos` covers every field, so the default shallow-prop compare would
 // re-render all fields whenever any one of them changes. Compare only the
 // slice this field actually reads instead.
-const FieldInput = React.memo(FieldInputInner, (prev, next) => {
+const FieldInput = /* @__PURE__ */ React.memo(FieldInputInner, (prev, next) => {
   const name = prev.fieldDescription.name;
   return (
     prev.fieldDescription === next.fieldDescription &&
diff --git a/packages/react/tsup.config.ts b/packages/react/tsup.config.ts
index 91aaa2c..0bfed6f 100644
--- a/packages/react/tsup.config.ts
+++ b/packages/react/tsup.config.ts
@@ -5,7 +5,11 @@ export default defineConfig({
   format: ['esm', 'cjs'],
   dts: true,
   clean: true,
-  sourcemap: true,
+  // Sourcemaps are not published: tsup inlines the full TS source via
+  // sourcesContent, which made the maps ~48% of the tarball (core: 75.7 KB of
+  // 157 KB unpacked) on every consumer install. Flip back to `sourcemap: true`
+  // if stepping into the library source is worth that.
+  sourcemap: false,
   // QUAN TRỌNG
   external: ['react', 'react/jsx-runtime', '@dynamic-field-kit/core'],
 });
diff --git a/packages/vue/README.md b/packages/vue/README.md
index 64e0f13..77ec142 100644
--- a/packages/vue/README.md
+++ b/packages/vue/README.md
@@ -4,7 +4,9 @@ Vue 3 adapter for `@dynamic-field-kit/core`.
 
 This package provides Vue components that render `FieldDescription[]` and resolve field renderers through the shared registry used by `dynamic-field-kit`.
 
-Live demo: https://vannt-dev.github.io/dynamic-field-kit/vue/
+Live demo: https://vannt-dev.github.io/dynamic-field-kit/vue/ — tabs for the
+basic schema, the enterprise features (`useDynamicForm`, HTML5 renderers, blur
+wiring, DevTools) and the multi-step wizard.
 
 ## Install
 
@@ -28,11 +30,25 @@ Note: `@dynamic-field-kit/core` and `vue` are **peer dependencies** — this ada
 - `FieldRendererProps`
 - `Properties`
 - `LayoutConfig`
-- `validateField` / `validateFields` / `resolveDisabled` / `resolveReadOnly` / `ValidationResult`
 - `useDynamicForm`
 - `DynamicFormDevTools`
 - `defaultRenderersMap` / `getDefaultRenderer`
 
+Re-exported from `@dynamic-field-kit/core` so a consumer app rarely has to import
+both packages:
+
+- `validateField` / `validateFieldAsync` — one field, returns `string[]`
+- `validateFields` / `validateFieldsAsync` — a whole schema, returns `ValidationResult`
+- `resolveDisabled` / `resolveReadOnly` / `resolveOptions` — resolve a field's dynamic conditions and options
+- `validators` — the built-in validator helpers (`required`, `email`, `minLength`, `compose`, …)
+- `ValidationResult`
+
+`useDynamicForm` validates **synchronously** via `validateFields`, including on
+submit. Fields whose `validate` hook returns a Promise are treated as valid on
+that path, so run async rules through `validateFieldsAsync` yourself. See the
+[core README](https://github.com/vannt-dev/dynamic-field-kit/tree/develop/packages/core#sync-vs-async-validation)
+for the full rules.
+
 Default layouts are registered automatically when you import the package root.
 
 Built-in layouts:
diff --git a/packages/vue/package.json b/packages/vue/package.json
index cac7d8a..371a7c7 100644
--- a/packages/vue/package.json
+++ b/packages/vue/package.json
@@ -30,7 +30,8 @@
     "@vue/test-utils": "^2.4.6",
     "jsdom": "^24.0.0",
     "tsup": "^8.0.1",
-    "vitest": "^1.6.0"
+    "vitest": "^1.6.0",
+    "vue": "^3.5.32"
   },
   "exports": {
     ".": {
diff --git a/packages/vue/src/components/DynamicFormDevTools.ts b/packages/vue/src/components/DynamicFormDevTools.ts
index 396f526..e8ada7f 100644
--- a/packages/vue/src/components/DynamicFormDevTools.ts
+++ b/packages/vue/src/components/DynamicFormDevTools.ts
@@ -1,7 +1,7 @@
 import { FieldDescription, Properties } from '@dynamic-field-kit/core';
 import { defineComponent, h, PropType, ref } from 'vue';
 
-export const DynamicFormDevTools = defineComponent({
+export const DynamicFormDevTools = /* @__PURE__ */ defineComponent({
   name: 'DynamicFormDevTools',
   props: {
     data: {
diff --git a/packages/vue/src/components/DynamicInput.ts b/packages/vue/src/components/DynamicInput.ts
index afe71ba..1d84b45 100644
--- a/packages/vue/src/components/DynamicInput.ts
+++ b/packages/vue/src/components/DynamicInput.ts
@@ -4,7 +4,7 @@ import { FieldTypeKey, Properties } from '@dynamic-field-kit/core';
 import { getDefaultRenderer } from '../defaultRenderers';
 import { useFieldRegistry } from '../fieldRegistryContext';
 
-const DynamicInput = defineComponent({
+const DynamicInput = /* @__PURE__ */ defineComponent({
   name: 'DynamicInput',
 
   props: {
diff --git a/packages/vue/src/components/FieldInput.ts b/packages/vue/src/components/FieldInput.ts
index d4d25eb..99382cd 100644
--- a/packages/vue/src/components/FieldInput.ts
+++ b/packages/vue/src/components/FieldInput.ts
@@ -9,7 +9,7 @@ import {
 import { defineComponent, h, PropType } from 'vue';
 import DynamicInput from './DynamicInput';
 
-const FieldInput = defineComponent({
+const FieldInput = /* @__PURE__ */ defineComponent({
   name: 'FieldInput',
   props: {
     fieldDescription: {
diff --git a/packages/vue/src/components/MultiFieldInput.ts b/packages/vue/src/components/MultiFieldInput.ts
index eecb661..5a40834 100644
--- a/packages/vue/src/components/MultiFieldInput.ts
+++ b/packages/vue/src/components/MultiFieldInput.ts
@@ -24,22 +24,33 @@ function resolveLayout(layout?: LayoutConfig) {
   return { type: layout.type, config: layout };
 }
 
-// Forward-declared with an explicit type so the recursive h() call inside
-// renderGroupField doesn't force TypeScript to infer MultiFieldInput's type
-// from within its own initializer (which fails to build: "implicitly has
-// type 'any' because it does not have a type annotation and is referenced
-// ... in its own initializer"). Assigned once MultiFieldInput exists below.
-// Must be declared before, and assigned after, MultiFieldInput is defined,
-// so it can't be a `const` despite only ever being assigned once.
-// eslint-disable-next-line prefer-const
-let multiFieldInputSelfRef: Component;
+// The recursive h() call inside renderGroupField cannot name MultiFieldInput
+// directly: that forces TypeScript to infer its type from within its own
+// initializer, which fails to build with "implicitly has type 'any' because it
+// does not have a type annotation and is referenced ... in its own
+// initializer". A function declaration solves it twice over -- the explicit
+// return type breaks the inference cycle, and the declaration is hoisted, so
+// the initializer below can call it.
+//
+// It must stay a function rather than a module-scope
+// `selfRef = MultiFieldInput` assignment. A bare top-level assignment is a side
+// effect no bundler can drop, and it anchored MultiFieldInput -> FieldInput ->
+// DynamicInput -> every default renderer into consumer bundles that imported
+// none of them (~11.5 KB minified). A function body is not evaluated until it
+// is called, so nothing is retained until something actually renders a group.
+function selfRef(): Component {
+  // Safe despite the forward reference: this body only runs during a render,
+  // long after the module has finished evaluating.
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
+  return MultiFieldInput;
+}
 
 // Repeatable field groups render a nested MultiFieldInput per item, so this
 // component renders itself recursively (see renderGroupField below) rather
 // than delegating to a separate group component. A separate file importing
 // both MultiFieldInput and FieldInput (which would need to import it back)
 // breaks Vue's declaration-file generation with a circular type alias.
-const MultiFieldInput = defineComponent({
+const MultiFieldInput = /* @__PURE__ */ defineComponent({
   name: 'MultiFieldInput',
 
   props: {
@@ -207,7 +218,7 @@ const MultiFieldInput = defineComponent({
             },
             [
               h('div', { style: { flex: 1 } }, [
-                h(multiFieldInputSelfRef, {
+                h(selfRef(), {
                   fieldDescriptions: fields,
                   properties: item,
                   rootData: props.rootData ?? data,
@@ -268,6 +279,4 @@ const MultiFieldInput = defineComponent({
   },
 });
 
-multiFieldInputSelfRef = MultiFieldInput;
-
 export default MultiFieldInput;
diff --git a/packages/vue/src/defaultRenderers.ts b/packages/vue/src/defaultRenderers.ts
index e750184..0ffd122 100644
--- a/packages/vue/src/defaultRenderers.ts
+++ b/packages/vue/src/defaultRenderers.ts
@@ -2,7 +2,7 @@
 import { Properties } from '@dynamic-field-kit/core';
 import { defineComponent, h, PropType } from 'vue';
 
-export const DefaultTextRenderer = defineComponent({
+export const DefaultTextRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultTextRenderer',
   props: {
     value: null,
@@ -46,7 +46,7 @@ export const DefaultTextRenderer = defineComponent({
   },
 });
 
-export const DefaultNumberRenderer = defineComponent({
+export const DefaultNumberRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultNumberRenderer',
   props: {
     value: null,
@@ -88,7 +88,7 @@ export const DefaultNumberRenderer = defineComponent({
   },
 });
 
-export const DefaultPasswordRenderer = defineComponent({
+export const DefaultPasswordRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultPasswordRenderer',
   setup(props, { attrs }) {
     return () =>
@@ -100,7 +100,7 @@ export const DefaultPasswordRenderer = defineComponent({
   },
 });
 
-export const DefaultEmailRenderer = defineComponent({
+export const DefaultEmailRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultEmailRenderer',
   setup(props, { attrs }) {
     return () =>
@@ -112,7 +112,7 @@ export const DefaultEmailRenderer = defineComponent({
   },
 });
 
-export const DefaultTextareaRenderer = defineComponent({
+export const DefaultTextareaRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultTextareaRenderer',
   props: {
     value: null,
@@ -151,7 +151,7 @@ export const DefaultTextareaRenderer = defineComponent({
   },
 });
 
-export const DefaultCheckboxRenderer = defineComponent({
+export const DefaultCheckboxRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultCheckboxRenderer',
   props: {
     value: null,
@@ -188,7 +188,7 @@ export const DefaultCheckboxRenderer = defineComponent({
   },
 });
 
-export const DefaultSelectRenderer = defineComponent({
+export const DefaultSelectRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultSelectRenderer',
   props: {
     value: null,
@@ -245,7 +245,7 @@ export const DefaultSelectRenderer = defineComponent({
   },
 });
 
-export const DefaultRadioRenderer = defineComponent({
+export const DefaultRadioRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultRadioRenderer',
   props: {
     value: null,
@@ -313,7 +313,7 @@ export const DefaultRadioRenderer = defineComponent({
   },
 });
 
-export const DefaultRangeRenderer = defineComponent({
+export const DefaultRangeRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultRangeRenderer',
   props: {
     value: null,
@@ -354,7 +354,7 @@ export const DefaultRangeRenderer = defineComponent({
   },
 });
 
-export const DefaultFileRenderer = defineComponent({
+export const DefaultFileRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultFileRenderer',
   props: {
     value: null,
@@ -397,7 +397,7 @@ export const DefaultFileRenderer = defineComponent({
   },
 });
 
-export const DefaultDateRenderer = defineComponent({
+export const DefaultDateRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultDateRenderer',
   setup(props, { attrs }) {
     return () =>
@@ -409,7 +409,7 @@ export const DefaultDateRenderer = defineComponent({
   },
 });
 
-export const DefaultTimeRenderer = defineComponent({
+export const DefaultTimeRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultTimeRenderer',
   setup(props, { attrs }) {
     return () =>
@@ -421,7 +421,7 @@ export const DefaultTimeRenderer = defineComponent({
   },
 });
 
-export const DefaultDateTimeLocalRenderer = defineComponent({
+export const DefaultDateTimeLocalRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultDateTimeLocalRenderer',
   setup(props, { attrs }) {
     return () =>
@@ -433,7 +433,7 @@ export const DefaultDateTimeLocalRenderer = defineComponent({
   },
 });
 
-export const DefaultSwitchRenderer = defineComponent({
+export const DefaultSwitchRenderer = /* @__PURE__ */ defineComponent({
   name: 'DefaultSwitchRenderer',
   setup(props, { attrs }) {
     return () =>
diff --git a/packages/vue/tsup.config.ts b/packages/vue/tsup.config.ts
index 170dcb8..0daf56c 100644
--- a/packages/vue/tsup.config.ts
+++ b/packages/vue/tsup.config.ts
@@ -5,6 +5,10 @@ export default defineConfig({
   format: ['esm', 'cjs'],
   dts: true,
   clean: true,
-  sourcemap: true,
+  // Sourcemaps are not published: tsup inlines the full TS source via
+  // sourcesContent, which made the maps ~48% of the tarball (core: 75.7 KB of
+  // 157 KB unpacked) on every consumer install. Flip back to `sourcemap: true`
+  // if stepping into the library source is worth that.
+  sourcemap: false,
   external: ['vue', '@vue/runtime-core', '@dynamic-field-kit/core'],
 });
diff --git a/scripts/build-changed.js b/scripts/build-changed.js
index 3e5c69c..4902ca8 100644
--- a/scripts/build-changed.js
+++ b/scripts/build-changed.js
@@ -1,8 +1,8 @@
 #!/usr/bin/env node
 // Build only changed packages based on git diff
+const { execSync, spawnSync } = require('child_process');
 const fs = require('fs');
 const path = require('path');
-const { execSync, spawnSync } = require('child_process');
 
 function readJSON(p) {
   try {
diff --git a/scripts/check-cross-framework-imports.js b/scripts/check-cross-framework-imports.js
index 48c054a..a9abb84 100644
--- a/scripts/check-cross-framework-imports.js
+++ b/scripts/check-cross-framework-imports.js
@@ -5,9 +5,18 @@
 const fs = require('fs');
 const path = require('path');
 
+const FRAMEWORK_PACKAGES = ['react', 'vue', 'angular'];
+
+const IMPORT_PATTERN = /from\s+['"]@dynamic-field-kit\/(vue|angular|react)['"]/;
+const REQUIRE_PATTERN =
+  /require\(['"]@dynamic-field-kit\/(vue|angular|react)['"]\)/;
+
 function walk(dir, cb) {
-  const entries = fs.readdirSync(dir, { withFileTypes: true });
-  for (const e of entries) {
+  if (!fs.existsSync(dir)) {
+    return;
+  }
+
+  for (const e of fs.readdirSync(dir, { withFileTypes: true })) {
     const full = path.join(dir, e.name);
     if (e.isDirectory()) {
       walk(full, cb);
@@ -18,52 +27,48 @@ function walk(dir, cb) {
 }
 
 function isSourceFile(p) {
-  return /\\.(ts|tsx|js|jsx)$/.test(p);
+  return /\.(ts|tsx|js|jsx)$/.test(p);
 }
 
-const repoRoot = path.resolve(__dirname, '..');
-const roots = [
-  path.resolve(repoRoot, 'packages', 'react', 'src'),
-  path.resolve(repoRoot, 'packages', 'vue', 'src'),
-  path.resolve(repoRoot, 'packages', 'angular', 'src'),
-];
-
-let violations = [];
+function findCrossFrameworkImports(root = path.resolve(__dirname, '..')) {
+  const violations = [];
 
-for (const root of roots) {
-  walk(root, (file) => {
-    if (!isSourceFile(file)) return;
-    const content = fs.readFileSync(file, 'utf8');
-    const lines = content.split(/\r?\n/);
-    for (let i = 0; i < lines.length; i++) {
-      const line = lines[i];
-      const m = line.match(
-        /from\s+['"]@dynamic-field-kit\/(vue|angular|react)['"]/
-      );
-      if (m) {
-        violations.push({ file, line: i + 1, framework: m[1] });
-      }
-      const m2 = line.match(
-        /require\(['"]@dynamic-field-kit\/(vue|angular|react)['"]\)/
-      );
-      if (m2) {
-        violations.push({ file, line: i + 1, framework: m2[1] });
+  for (const pkg of FRAMEWORK_PACKAGES) {
+    walk(path.join(root, 'packages', pkg, 'src'), (file) => {
+      if (!isSourceFile(file)) {
+        return;
       }
-    }
-  });
+
+      const lines = fs.readFileSync(file, 'utf8').split(/\r?\n/);
+
+      lines.forEach((line, i) => {
+        const m = line.match(IMPORT_PATTERN) || line.match(REQUIRE_PATTERN);
+        if (m) {
+          violations.push({ file, line: i + 1, framework: m[1] });
+        }
+      });
+    });
+  }
+
+  return violations;
 }
 
-if (violations.length) {
-  console.error('Cross-framework imports detected:');
-  violations.forEach((v) => {
-    console.error(
-      ` - ${v.file}:${v.line} (importing @dynamic-field-kit/${v.framework})`
-    );
-  });
-  process.exit(1);
-} else {
+if (require.main === module) {
+  const violations = findCrossFrameworkImports();
+
+  if (violations.length) {
+    console.error('Cross-framework imports detected:');
+    violations.forEach((v) => {
+      console.error(
+        ` - ${v.file}:${v.line} (importing @dynamic-field-kit/${v.framework})`
+      );
+    });
+    process.exit(1);
+  }
+
   console.log(
     'OK: No cross-framework imports found in src of react/vue/angular packages.'
   );
-  process.exit(0);
 }
+
+module.exports = { findCrossFrameworkImports, FRAMEWORK_PACKAGES };
diff --git a/scripts/check-cross-framework-imports.test.js b/scripts/check-cross-framework-imports.test.js
new file mode 100644
index 0000000..5d88717
--- /dev/null
+++ b/scripts/check-cross-framework-imports.test.js
@@ -0,0 +1,108 @@
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import { afterEach, describe, expect, it } from 'vitest';
+
+import { findCrossFrameworkImports } from './check-cross-framework-imports.js';
+
+const tempRoots = [];
+
+/** Writes `files` (relative path -> contents) under packages/<pkg>/src. */
+function makeWorkspace(files) {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'cross-imports-'));
+  tempRoots.push(root);
+
+  for (const pkg of ['react', 'vue', 'angular']) {
+    fs.mkdirSync(path.join(root, 'packages', pkg, 'src'), { recursive: true });
+  }
+
+  for (const [relative, contents] of Object.entries(files)) {
+    const file = path.join(root, relative);
+    fs.mkdirSync(path.dirname(file), { recursive: true });
+    fs.writeFileSync(file, contents);
+  }
+
+  return root;
+}
+
+afterEach(() => {
+  while (tempRoots.length) {
+    fs.rmSync(tempRoots.pop(), { recursive: true, force: true });
+  }
+});
+
+describe('findCrossFrameworkImports', () => {
+  it('detects an import of a sibling framework package', () => {
+    const root = makeWorkspace({
+      'packages/vue/src/index.ts':
+        "import { DynamicInput } from '@dynamic-field-kit/react';\n",
+    });
+
+    expect(findCrossFrameworkImports(root)).toEqual([
+      {
+        file: path.join(root, 'packages', 'vue', 'src', 'index.ts'),
+        line: 1,
+        framework: 'react',
+      },
+    ]);
+  });
+
+  it('detects a require() of a sibling framework package', () => {
+    const root = makeWorkspace({
+      'packages/react/src/legacy.js':
+        "const vue = require('@dynamic-field-kit/vue');\n",
+    });
+
+    expect(findCrossFrameworkImports(root)).toMatchObject([
+      { line: 1, framework: 'vue' },
+    ]);
+  });
+
+  it('reports the line number of a violation further down a file', () => {
+    const root = makeWorkspace({
+      'packages/angular/src/index.ts': [
+        "import { defineField } from '@dynamic-field-kit/core';",
+        '',
+        "import { x } from '@dynamic-field-kit/vue';",
+      ].join('\n'),
+    });
+
+    expect(findCrossFrameworkImports(root)).toMatchObject([
+      { line: 3, framework: 'vue' },
+    ]);
+  });
+
+  it('scans nested directories', () => {
+    const root = makeWorkspace({
+      'packages/vue/src/layout/deep/nested.tsx':
+        "import x from '@dynamic-field-kit/angular';\n",
+    });
+
+    expect(findCrossFrameworkImports(root)).toHaveLength(1);
+  });
+
+  it('allows importing core', () => {
+    const root = makeWorkspace({
+      'packages/vue/src/index.ts':
+        "import { defineField } from '@dynamic-field-kit/core';\n",
+    });
+
+    expect(findCrossFrameworkImports(root)).toEqual([]);
+  });
+
+  it('ignores files that are not source files', () => {
+    const root = makeWorkspace({
+      'packages/vue/src/README.md':
+        "import { x } from '@dynamic-field-kit/react';\n",
+      'packages/vue/src/data.json': '{}',
+    });
+
+    expect(findCrossFrameworkImports(root)).toEqual([]);
+  });
+
+  it('finds nothing in this repo', () => {
+    expect(findCrossFrameworkImports(path.resolve(__dirname, '..'))).toEqual(
+      []
+    );
+  });
+});
diff --git a/scripts/diagnose-hoist.js b/scripts/diagnose-hoist.js
index 820327a..f173a18 100644
--- a/scripts/diagnose-hoist.js
+++ b/scripts/diagnose-hoist.js
@@ -7,7 +7,9 @@ packages.forEach((p) => {
   try {
     const dir = `./packages/${p}`;
     console.log(`\n=== ${p.toUpperCase()} ===`);
-    const out = execSync(`npm ls @dynamic-field-kit/core --depth=0`, {
+    // stdio: 'inherit' prints straight to our stdout, so there is nothing to
+    // capture from the return value.
+    execSync(`npm ls @dynamic-field-kit/core --depth=0`, {
       cwd: dir,
       stdio: 'inherit',
     });
diff --git a/scripts/show-sizes.js b/scripts/show-sizes.js
index 90f0273..932b517 100644
--- a/scripts/show-sizes.js
+++ b/scripts/show-sizes.js
@@ -1,29 +1,83 @@
 const fs = require('fs');
 const path = require('path');
 
-const root = process.cwd();
-const packages = ['core', 'react', 'vue'];
+const DEFAULT_PACKAGES = ['core', 'react', 'vue', 'angular'];
 
-console.log('=== Bundle Sizes ===\n');
+const stripDotSlash = (entry) => entry.replace(/^\.\//, '');
 
-for (const pkg of packages) {
-  const distPath = path.join(root, 'packages', pkg, 'dist');
+/**
+ * Resolves a package's ESM and CJS entry points from its own manifest rather
+ * than guessing from file extensions. The `.js`/`.mjs` pair that tsup emits for
+ * core and react inverts for vue, which is `"type": "module"` and so ships ESM
+ * as `.js` and CommonJS as `.cjs`.
+ */
+function entryPoints(pkgJson) {
+  const conditions = (pkgJson.exports && pkgJson.exports['.']) || {};
+  const esm = conditions.import || pkgJson.module;
+  const cjs = conditions.require || pkgJson.main;
 
-  if (!fs.existsSync(distPath)) {
-    console.log(`${pkg}: dist not found`);
-    continue;
-  }
+  // ng-packagr ships ESM only and points both `main` and `module` at the same
+  // fesm2022 bundle, so treating `main` as CJS there would invent a bundle.
+  const hasDistinctCjs =
+    cjs && (!esm || stripDotSlash(cjs) !== stripDotSlash(esm));
+
+  return { esm, cjs: hasDistinctCjs ? cjs : null };
+}
+
+function collectBundleSizes(root, packages = DEFAULT_PACKAGES) {
+  const results = [];
+
+  for (const pkg of packages) {
+    const pkgDir = path.join(root, 'packages', pkg);
+    const manifest = path.join(pkgDir, 'package.json');
+
+    if (!fs.existsSync(manifest)) {
+      results.push({ pkg, format: null, bytes: null, missing: true });
+      continue;
+    }
+
+    const { esm, cjs } = entryPoints(
+      JSON.parse(fs.readFileSync(manifest, 'utf8'))
+    );
+    const found = [];
 
-  const mainFile = path.join(distPath, 'index.js');
-  const esmFile = path.join(distPath, 'index.mjs');
+    for (const [format, entry] of [
+      ['ESM', esm],
+      ['CJS', cjs],
+    ]) {
+      if (!entry) {
+        continue;
+      }
 
-  if (fs.existsSync(mainFile)) {
-    const size = fs.statSync(mainFile).size;
-    console.log(`${pkg} (CJS): ${(size / 1024).toFixed(2)} KB`);
+      const file = path.join(pkgDir, stripDotSlash(entry));
+      if (fs.existsSync(file)) {
+        found.push({ pkg, format, bytes: fs.statSync(file).size });
+      }
+    }
+
+    if (found.length === 0) {
+      results.push({ pkg, format: null, bytes: null, missing: true });
+    } else {
+      results.push(...found);
+    }
   }
 
-  if (fs.existsSync(esmFile)) {
-    const size = fs.statSync(esmFile).size;
-    console.log(`${pkg} (ESM): ${(size / 1024).toFixed(2)} KB`);
+  return results;
+}
+
+function formatSizes(sizes) {
+  return sizes.map((entry) =>
+    entry.missing
+      ? `${entry.pkg}: not built`
+      : `${entry.pkg} (${entry.format}): ${(entry.bytes / 1024).toFixed(2)} KB`
+  );
+}
+
+if (require.main === module) {
+  console.log('=== Bundle Sizes ===\n');
+  for (const line of formatSizes(collectBundleSizes(process.cwd()))) {
+    console.log(line);
   }
 }
+
+module.exports = { collectBundleSizes, formatSizes, DEFAULT_PACKAGES };
diff --git a/scripts/show-sizes.test.js b/scripts/show-sizes.test.js
new file mode 100644
index 0000000..5bd93a8
--- /dev/null
+++ b/scripts/show-sizes.test.js
@@ -0,0 +1,149 @@
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import { afterEach, describe, expect, it } from 'vitest';
+
+import { collectBundleSizes } from './show-sizes.js';
+
+const tempRoots = [];
+
+/**
+ * Builds a throwaway workspace root containing one package, so the collector
+ * runs against a real filesystem instead of a mocked one.
+ */
+function makeWorkspace(pkg, packageJson, distFiles) {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'show-sizes-'));
+  tempRoots.push(root);
+
+  const pkgDir = path.join(root, 'packages', pkg);
+  fs.mkdirSync(pkgDir, { recursive: true });
+  fs.writeFileSync(
+    path.join(pkgDir, 'package.json'),
+    JSON.stringify(packageJson)
+  );
+
+  for (const [relative, contents] of Object.entries(distFiles)) {
+    const file = path.join(pkgDir, relative);
+    fs.mkdirSync(path.dirname(file), { recursive: true });
+    fs.writeFileSync(file, contents);
+  }
+
+  return root;
+}
+
+afterEach(() => {
+  while (tempRoots.length) {
+    fs.rmSync(tempRoots.pop(), { recursive: true, force: true });
+  }
+});
+
+describe('collectBundleSizes', () => {
+  it('labels a "type: module" package by its exports map, not by file extension', () => {
+    // The vue package's shape: `.js` is the ESM build and `.cjs` is CommonJS,
+    // the opposite of the `.js`/`.mjs` convention core and react use.
+    const root = makeWorkspace(
+      'vue',
+      {
+        name: '@dynamic-field-kit/vue',
+        type: 'module',
+        main: './dist/index.cjs',
+        module: './dist/index.js',
+        exports: {
+          '.': {
+            types: './dist/index.d.ts',
+            import: './dist/index.js',
+            require: './dist/index.cjs',
+          },
+        },
+      },
+      {
+        'dist/index.js': 'e'.repeat(2048),
+        'dist/index.cjs': 'c'.repeat(1024),
+      }
+    );
+
+    expect(collectBundleSizes(root, ['vue'])).toEqual([
+      { pkg: 'vue', format: 'ESM', bytes: 2048 },
+      { pkg: 'vue', format: 'CJS', bytes: 1024 },
+    ]);
+  });
+
+  it('labels a `.js`/`.mjs` package correctly too', () => {
+    const root = makeWorkspace(
+      'core',
+      {
+        name: '@dynamic-field-kit/core',
+        main: 'dist/index.js',
+        module: 'dist/index.mjs',
+        exports: {
+          '.': {
+            import: './dist/index.mjs',
+            require: './dist/index.js',
+          },
+        },
+      },
+      {
+        'dist/index.mjs': 'e'.repeat(512),
+        'dist/index.js': 'c'.repeat(256),
+      }
+    );
+
+    expect(collectBundleSizes(root, ['core'])).toEqual([
+      { pkg: 'core', format: 'ESM', bytes: 512 },
+      { pkg: 'core', format: 'CJS', bytes: 256 },
+    ]);
+  });
+
+  it('reports an ESM-only package once when main and module are the same file', () => {
+    // The angular package's shape: ng-packagr ships fesm2022 only, and points
+    // both `main` and `module` at it. Reporting that file as CJS would be a lie.
+    const root = makeWorkspace(
+      'angular',
+      {
+        name: '@dynamic-field-kit/angular',
+        type: 'module',
+        main: 'dist/fesm2022/dynamic-field-kit-angular.mjs',
+        module: 'dist/fesm2022/dynamic-field-kit-angular.mjs',
+      },
+      { 'dist/fesm2022/dynamic-field-kit-angular.mjs': 'a'.repeat(4096) }
+    );
+
+    expect(collectBundleSizes(root, ['angular'])).toEqual([
+      { pkg: 'angular', format: 'ESM', bytes: 4096 },
+    ]);
+  });
+
+  it('marks a package as unbuilt when its entry file is missing', () => {
+    const root = makeWorkspace(
+      'core',
+      {
+        name: '@dynamic-field-kit/core',
+        main: 'dist/index.js',
+        module: 'dist/index.mjs',
+      },
+      {}
+    );
+
+    expect(collectBundleSizes(root, ['core'])).toEqual([
+      { pkg: 'core', format: null, bytes: null, missing: true },
+    ]);
+  });
+
+  it('covers every published package by default', () => {
+    const root = path.resolve(__dirname, '..');
+    const reported = new Set(
+      collectBundleSizes(root).map((entry) => entry.pkg)
+    );
+
+    expect([...reported].sort()).toEqual(['angular', 'core', 'react', 'vue']);
+  });
+
+  it('resolves the real vue package entries to the right formats', () => {
+    const root = path.resolve(__dirname, '..');
+    const vue = collectBundleSizes(root, ['vue']);
+
+    // Regression guard: `dist/index.js` in the vue package is ESM. An
+    // extension-based guess reports it as CJS and never reports `dist/index.cjs`.
+    expect(vue.map((entry) => entry.format)).toEqual(['ESM', 'CJS']);
+  });
+});
diff --git a/scripts/verify-framework-deps.js b/scripts/verify-framework-deps.js
index 5a4664a..02b580f 100644
--- a/scripts/verify-framework-deps.js
+++ b/scripts/verify-framework-deps.js
@@ -1,53 +1,77 @@
 #!/usr/bin/env node
-// Verify that each framework package (react, vue, angular) depends only on core
-// and does not depend on the other framework packages.
+// Verify that each framework package (react, vue, angular) depends only on core,
+// and that it dev-installs every framework it peer-depends on.
 
-const path = require('path');
 const fs = require('fs');
+const path = require('path');
+
+const FRAMEWORK_PACKAGES = ['react', 'vue', 'angular'];
 
 function readJson(p) {
   const data = fs.readFileSync(p, 'utf8');
   return JSON.parse(data);
 }
 
-const base = path.resolve(__dirname, '..');
-const pkgs = {
-  react: path.join(base, 'packages', 'react', 'package.json'),
-  vue: path.join(base, 'packages', 'vue', 'package.json'),
-  angular: path.join(base, 'packages', 'angular', 'package.json'),
-};
-
-let problems = [];
-
-function check(pkgName, pjson) {
-  const other = Object.keys(pkgs).filter((n) => n !== pkgName);
+function crossFrameworkProblems(pkgName, pjson) {
   const deps = Object.assign(
     {},
     pjson.dependencies || {},
     pjson.peerDependencies || {},
     pjson.devDependencies || {}
   );
-  other.forEach((o) => {
-    const alias = `@dynamic-field-kit/${o}`;
-    if (deps && Object.prototype.hasOwnProperty.call(deps, alias)) {
-      problems.push(
+
+  return FRAMEWORK_PACKAGES.filter((other) => other !== pkgName)
+    .map((other) => `@dynamic-field-kit/${other}`)
+    .filter((alias) => Object.prototype.hasOwnProperty.call(deps, alias))
+    .map(
+      (alias) =>
         `${pkgName}: depends on ${alias} (should depend only on core) (in dependencies/peer/dev)`
-      );
-    }
-  });
+    );
 }
 
-for (const [name, p] of Object.entries(pkgs)) {
-  const pjson = readJson(p);
-  check(name, pjson);
+// A peer that is never dev-installed still resolves during a local build or
+// test run, but only by borrowing whatever the workspace root happens to hoist.
+// That makes the package's own manifest a lie about what it was verified
+// against, and it breaks the moment the root stops declaring it.
+function undeclaredPeerProblems(pkgName, pjson) {
+  const devDeps = pjson.devDependencies || {};
+
+  return Object.keys(pjson.peerDependencies || {})
+    .filter((peer) => !Object.prototype.hasOwnProperty.call(devDeps, peer))
+    .map(
+      (peer) =>
+        `${pkgName}: peer-depends on ${peer} but does not declare it in devDependencies, ` +
+        `so it builds and tests against whatever the workspace root happens to hoist`
+    );
 }
 
-if (problems.length) {
-  console.error('Framework dependency issues found:');
-  problems.forEach((m) => console.error(' -', m));
-  process.exit(1);
-} else {
+function findFrameworkDepProblems(root = path.resolve(__dirname, '..')) {
+  const problems = [];
+
+  for (const pkgName of FRAMEWORK_PACKAGES) {
+    const pjson = readJson(
+      path.join(root, 'packages', pkgName, 'package.json')
+    );
+
+    problems.push(...crossFrameworkProblems(pkgName, pjson));
+    problems.push(...undeclaredPeerProblems(pkgName, pjson));
+  }
+
+  return problems;
+}
+
+if (require.main === module) {
+  const problems = findFrameworkDepProblems();
+
+  if (problems.length) {
+    console.error('Framework dependency issues found:');
+    problems.forEach((m) => console.error(' -', m));
+    process.exit(1);
+  }
+
   console.log(
-    'OK: No cross-framework dependencies detected in react/vue/angular packages.'
+    'OK: react/vue/angular depend only on core and dev-install their own peers.'
   );
 }
+
+module.exports = { findFrameworkDepProblems, FRAMEWORK_PACKAGES };
diff --git a/scripts/verify-framework-deps.test.js b/scripts/verify-framework-deps.test.js
new file mode 100644
index 0000000..e559409
--- /dev/null
+++ b/scripts/verify-framework-deps.test.js
@@ -0,0 +1,116 @@
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import { afterEach, describe, expect, it } from 'vitest';
+
+import { findFrameworkDepProblems } from './verify-framework-deps.js';
+
+const tempRoots = [];
+
+const FRAMEWORKS = ['react', 'vue', 'angular'];
+
+/** A manifest that satisfies every rule, so each test can break one thing. */
+function healthyManifest(pkg, overrides = {}) {
+  return {
+    name: `@dynamic-field-kit/${pkg}`,
+    peerDependencies: { '@dynamic-field-kit/core': '^1.3.0' },
+    devDependencies: { '@dynamic-field-kit/core': '^1.3.0' },
+    ...overrides,
+  };
+}
+
+function makeWorkspace(manifests) {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'framework-deps-'));
+  tempRoots.push(root);
+
+  for (const pkg of FRAMEWORKS) {
+    const pkgDir = path.join(root, 'packages', pkg);
+    fs.mkdirSync(pkgDir, { recursive: true });
+    fs.writeFileSync(
+      path.join(pkgDir, 'package.json'),
+      JSON.stringify(manifests[pkg] || healthyManifest(pkg))
+    );
+  }
+
+  return root;
+}
+
+afterEach(() => {
+  while (tempRoots.length) {
+    fs.rmSync(tempRoots.pop(), { recursive: true, force: true });
+  }
+});
+
+describe('findFrameworkDepProblems', () => {
+  it('accepts packages that declare every peer in devDependencies', () => {
+    const root = makeWorkspace({});
+
+    expect(findFrameworkDepProblems(root)).toEqual([]);
+  });
+
+  it('flags a package that does not dev-install a framework it peer-depends on', () => {
+    // A package that peer-depends on vue but never dev-installs it can only be
+    // built and tested by borrowing vue from the workspace root.
+    const root = makeWorkspace({
+      vue: healthyManifest('vue', {
+        peerDependencies: {
+          '@dynamic-field-kit/core': '^1.3.0',
+          vue: '^3.0.0',
+        },
+        devDependencies: { '@dynamic-field-kit/core': '^1.3.0' },
+      }),
+    });
+
+    expect(findFrameworkDepProblems(root)).toEqual([
+      'vue: peer-depends on vue but does not declare it in ' +
+        'devDependencies, so it builds and tests against whatever the ' +
+        'workspace root happens to hoist',
+    ]);
+  });
+
+  it('still flags a dependency on a sibling framework package', () => {
+    const root = makeWorkspace({
+      react: healthyManifest('react', {
+        dependencies: { '@dynamic-field-kit/vue': '^1.4.0' },
+      }),
+    });
+
+    expect(findFrameworkDepProblems(root)).toEqual([
+      'react: depends on @dynamic-field-kit/vue (should depend only on core) (in dependencies/peer/dev)',
+    ]);
+  });
+
+  it('reports both kinds of problem at once', () => {
+    const root = makeWorkspace({
+      react: healthyManifest('react', {
+        peerDependencies: {
+          '@dynamic-field-kit/core': '^1.3.0',
+          '@dynamic-field-kit/angular': '^1.4.0',
+          react: '^19.0.0',
+        },
+        devDependencies: { '@dynamic-field-kit/core': '^1.3.0' },
+      }),
+    });
+
+    // One cross-framework dependency, plus two peers left out of
+    // devDependencies (@dynamic-field-kit/angular and react). The sibling
+    // package is genuinely both problems at once, so it is reported twice.
+    expect(findFrameworkDepProblems(root)).toHaveLength(3);
+  });
+
+  it('applies the devDependencies rule to the core peer too', () => {
+    const root = makeWorkspace({
+      angular: healthyManifest('angular', { devDependencies: {} }),
+    });
+
+    expect(findFrameworkDepProblems(root)).toEqual([
+      'angular: peer-depends on @dynamic-field-kit/core but does not ' +
+        'declare it in devDependencies, so it builds and tests against ' +
+        'whatever the workspace root happens to hoist',
+    ]);
+  });
+
+  it('holds for the real packages in this repo', () => {
+    expect(findFrameworkDepProblems(path.resolve(__dirname, '..'))).toEqual([]);
+  });
+});
diff --git a/vitest.config.mjs b/vitest.config.mjs
new file mode 100644
index 0000000..ff50d9f
--- /dev/null
+++ b/vitest.config.mjs
@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config';
+
+// Root-level suite for the repo's own build/CI scripts in `scripts/`. The four
+// packages each run their own vitest with their own config and coverage floor;
+// this one deliberately covers nothing but `scripts/**`.
+export default defineConfig({
+  test: {
+    include: ['scripts/**/*.test.js'],
+    environment: 'node',
+  },
+});