feat(ember-form): add Ember adapter (@tanstack/ember-form)

packages/ember-form/.editorconfig

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+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+
+[*.hbs]
+insert_final_newline = false
+
+[*.{diff,md}]
+trim_trailing_whitespace = false

packages/ember-form/.env.development

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+# This file is committed to git and should not contain any secrets.
+#
+# Vite recommends using .env.local or .env.[mode].local if you need to manage secrets
+# SEE: https://vite.dev/guide/env-and-mode.html#env-files for more information.
+
+
+# Default NODE_ENV with vite build --mode=test is production
+NODE_ENV=development

packages/ember-form/.gitignore

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+# compiled output
+dist/
+dist-tests/
+declarations/
+
+# from scenarios
+tmp/
+config/optional-features.json
+ember-cli-build.cjs
+
+# npm/pnpm/yarn pack output
+*.tgz
+
+# deps & caches
+node_modules/
+.eslintcache
+.prettiercache
+
+# potentially containing secrets
+*.local

packages/ember-form/CONTRIBUTING.md

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+# How To Contribute
+
+## Installation
+
+- `git clone <repository-url>`
+- `cd ember-form`
+- `pnpm install`
+
+## Linting
+
+- `pnpm lint`
+- `pnpm lint:fix`
+
+## Building the addon
+
+- `pnpm build`
+
+## Running tests
+
+- `pnpm test` – Runs the test suite on the current Ember version
+- `pnpm test:watch` – Runs the test suite in "watch mode"
+
+## Running the test application
+
+- `pnpm start`
+- Visit the test application at [http://localhost:4200](http://localhost:4200).
+
+For more information on using ember-cli, visit [https://cli.emberjs.com/release/](https://cli.emberjs.com/release/).

packages/ember-form/LICENSE.md

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+The MIT License (MIT)
+
+Copyright (c) 2026
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

packages/ember-form/README.md

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+# @tanstack/ember-form
+
+Powerful, type-safe forms for Ember, built on `@tanstack/form-core`.
+
+## Compatibility
+
+- Ember.js v6.0 or above (gjs/gts only)
+- `@glimmer/component` v2
+
+## Installation
+
+```sh
+pnpm add @tanstack/ember-form
+```
+
+## Usage
+
+```gjs
+import Component from '@glimmer/component';
+import { fn, hash } from '@ember/helper';
+import { on } from '@ember/modifier';
+import { createForm, Field, Subscribe } from '@tanstack/ember-form';
+
+const handleInput = (field, event) => {
+  field.handleChange(event.target.value);
+};
+
+const tooShort = ({ value }) => (value.length < 3 ? 'Too short' : undefined);
+
+export default class SignupForm extends Component {
+  form = createForm(this, {
+    defaultValues: { firstName: '', lastName: '' },
+    onSubmit: async ({ value }) => {
+      console.log('submit', value);
+    },
+  });
+
+  submit = (event) => {
+    event.preventDefault();
+    this.form.handleSubmit();
+  };
+
+  pickSubmit = (state) => ({
+    cantSubmit: !state.canSubmit,
+    isSubmitting: state.isSubmitting,
+  });
+
+  <template>
+    <form {{on "submit" this.submit}}>
+      <this.form.Field
+        @name="firstName"
+        @validators={{hash onChange=tooShort}}
+        as |field|
+      >
+        <label>
+          First name
+          <input
+            value={{field.state.value}}
+            {{on "input" (fn handleInput field)}}
+          />
+        </label>
+        {{#each field.state.meta.errors as |error|}}
+          <em>{{error}}</em>
+        {{/each}}
+      </this.form.Field>
+
+      <Subscribe @form={{this.form}} @selector={{this.pickSubmit}} as |slice|>
+        <button type="submit" disabled={{slice.cantSubmit}}>
+          {{if slice.isSubmitting "Submitting…" "Submit"}}
+        </button>
+      </Subscribe>
+    </form>
+  </template>
+}
+```
+
+`<this.form.Field>` is closure-bound shorthand for `<Field @form={{this.form}}>`. Use whichever is more convenient.
+
+### API
+
+- `createForm(parent, options)` — Returns a `FormApi` extended with `useStore(selector?)` and a closure-bound `Field`. `parent` should be `this` from a `@glimmer/component` (or any destroyable owner). The form is mounted immediately and unmounted when `parent` is destroyed.
+- `<Field @form @name [@validators] [@defaultValue] [@asyncDebounceMs] [@listeners] [@mode]>` — Yields a `FieldApi` whose `state` is autotracked. Reads of `field.state.*` in templates rerender on store changes.
+- `<this.form.Field @name [...]>` — closure-bound variant of `<Field>` returned from `createForm`. Equivalent to passing `@form={{this.form}}` explicitly.
+- `<Subscribe @form [@selector]>` — Yields the result of `selector(form.store.state)` (or the full state when omitted), reactive across changes.
+- `form.useStore(selector?)` — Returns `{ current }` where `current` is autotracked. Useful outside of templates (e.g. in `@cached` getters).
+
+Everything else is re-exported from `@tanstack/form-core` (validators, types, helpers).
+
+## License
+
+This project is licensed under the [MIT License](LICENSE.md).

packages/ember-form/addon-main.cjs

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+'use strict';
+
+const { addonV1Shim } = require('@embroider/addon-shim');
+module.exports = addonV1Shim(__dirname);

packages/ember-form/babel.config.cjs

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+/**
+ * This babel.config is not used for publishing.
+ * It's only for the local editing experience
+ * (and linting)
+ */
+const { buildMacros } = require('@embroider/macros/babel');
+
+const {
+  babelCompatSupport,
+  templateCompatSupport,
+} = require('@embroider/compat/babel');
+
+const macros = buildMacros();
+
+// For scenario testing
+const isCompat = Boolean(process.env.ENABLE_COMPAT_BUILD);
+
+module.exports = {
+  plugins: [
+    [
+      '@babel/plugin-transform-typescript',
+      {
+        allExtensions: true,
+        onlyRemoveTypeImports: true,
+        allowDeclareFields: true,
+      },
+    ],
+    [
+      'babel-plugin-ember-template-compilation',
+      {
+        transforms: [
+          ...(isCompat ? templateCompatSupport() : macros.templateMacros),
+        ],
+      },
+    ],
+    [
+      'module:decorator-transforms',
+      {
+        runtime: {
+          import: require.resolve('decorator-transforms/runtime-esm'),
+        },
+      },
+    ],
+    ...(isCompat ? babelCompatSupport() : macros.babelMacros),
+  ],
+
+  generatorOpts: {
+    compact: false,
+  },
+};

packages/ember-form/babel.publish.config.cjs

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+/**
+ * This babel.config is only used for publishing.
+ *
+ * For local dev experience, see the babel.config
+ */
+module.exports = {
+  plugins: [
+    [
+      '@babel/plugin-transform-typescript',
+      {
+        allExtensions: true,
+        onlyRemoveTypeImports: true,
+        allowDeclareFields: true,
+      },
+    ],
+    [
+      'babel-plugin-ember-template-compilation',
+      {
+        targetFormat: 'hbs',
+        transforms: [],
+      },
+    ],
+    [
+      'module:decorator-transforms',
+      {
+        runtime: {
+          import: 'decorator-transforms/runtime-esm',
+        },
+      },
+    ],
+  ],
+
+  generatorOpts: {
+    compact: false,
+  },
+};

packages/ember-form/config/ember-cli-update.json

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+{
+  "schemaVersion": "1.0.0",
+  "projectName": "ember-form",
+  "packages": [
+    {
+      "name": "@ember/addon-blueprint",
+      "version": "0.17.1",
+      "blueprints": [
+        {
+          "name": "@ember/addon-blueprint",
+          "isBaseBlueprint": true,
+          "options": [
+            "--ci-provider=github",
+            "--pnpm"
+          ]
+        }
+      ]
+    }
+  ]
+}

packages/ember-form/demo-app/app.gts

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+import EmberApp from 'ember-strict-application-resolver';
+import EmberRouter from '@ember/routing/router';
+import PageTitleService from 'ember-page-title/services/page-title';
+
+class Router extends EmberRouter {
+  location = 'history';
+  rootURL = '/';
+}
+
+export class App extends EmberApp {
+  /**
+   * Any services or anything from the addon that needs to be in the app-tree registry
+   * will need to be manually specified here.
+   *
+   * Techniques to avoid needing this:
+   * - private services
+   * - require the consuming app import and configure themselves
+   *   (which is what we're emulating here)
+   */
+  modules = {
+    './router': Router,
+    './services/page-title': PageTitleService,
+    /**
+     * NOTE: this glob will import everything matching the glob,
+     *     and includes non-services in the services directory.
+     */
+    ...import.meta.glob('./services/**/*', { eager: true }),
+    /**
+     * These imports are not magic, but we do require that all entries in the
+     * modules object match a ./[type]/[name] pattern.
+     *
+     * See: https://rfcs.emberjs.com/id/1132-default-strict-resolver
+     */
+    ...import.meta.glob('./templates/**/*', { eager: true }),
+  };
+}
+
+Router.map(function () {});

packages/ember-form/demo-app/styles.css

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+/**
+* See: https://vite.dev/guide/features.html#css
+*      for features beyond normal CSS that are available to you.
+*
+* This CSS is meant for the demo-app only, and will not be included in the published assets for this library.
+*/