POC: perf(@glimmer/syntax): unified single-pass HTML+HBS scanner (3.2x–4.2x faster parse)

.github/actions/setup/action.yml

@@ -13,7 +13,7 @@ inputs:
 runs:
   using: 'composite'
   steps:
-    - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
+    - uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
       name: Install pnpm
       with:
         run_install: false

.github/workflows/ci-jobs.yml

@@ -37,8 +37,6 @@ jobs:
         run: pnpm build:types
       - name: Check internal types
         run: pnpm type-check:internals
-      - name: Check @handlebars/parser types
-        run: pnpm type-check:handlebars
       - name: Check published types
         run: pnpm type-check:types
 
@@ -61,6 +59,20 @@ jobs:
       - name: Check published types
         run: pnpm type-check:types
 
+  build-test:
+    name: package preparation test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: ./.github/actions/setup
+        with:
+          use_lockfile: "false"
+      - name: build
+        run: pnpm build
+      - uses: wyvox/action-no-git-diff@6d1f5759a221e2ea447974af795e395672e33328 # v1.0.1
+
   basic-test:
     name: Basic Test
     runs-on: ubuntu-latest
@@ -150,7 +162,7 @@ jobs:
   smoke-test:
     name: Smoke tests (Full Ember Apps)
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, types]
+    needs: [basic-test, lint, types, build-test]
     strategy:
       fail-fast: false
       matrix: ${{fromJson(needs.lint.outputs.matrix)}}
@@ -170,10 +182,34 @@ jobs:
         env:
           MATRIX_COMMAND: ${{ matrix.command }}
 
+  smoke-test-with-deprecations-removed:
+    name: Smoke tests with Deprecations Removed (Full Ember Apps)
+    runs-on: ubuntu-latest
+    needs: [basic-test, lint, types, build-test]
+    strategy:
+      fail-fast: false
+      matrix: ${{fromJson(needs.lint.outputs.matrix)}}
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: ./.github/actions/setup
+        with:
+          use_lockfile: "false"
+      - name: build
+        run: pnpm build
+      - name: test
+        env:
+          OVERRIDE_DEPRECATION_VERSION: "15.0.0"
+          MATRIX_COMMAND: ${{ matrix.command }}
+        working-directory: smoke-tests/scenarios
+        run: |
+          ${MATRIX_COMMAND}
+
   node-test:
     name: Node.js Tests
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, types]
+    needs: [basic-test, lint, types, build-test]
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
@@ -184,7 +220,7 @@ jobs:
           SHOULD_TRANSPILE_FOR_NODE: true
         run: pnpm build
       - name: test
-        run: pnpm test:node && pnpm --filter "@handlebars/parser" test
+        run: pnpm test:node
 
   blueprint-test:
     name: Blueprint Tests

.github/workflows/docs.yml

@@ -39,7 +39,7 @@ jobs:
           path: ember-api-docs-data
           persist-credentials: false
 
-      - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
+      - uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
         name: Install pnpm
         with:
           run_install: false

.github/workflows/glimmer-syntax-prettier-smoke-test.yml

@@ -17,7 +17,6 @@ on:
       - "packages/@glimmer/interfaces/**"
       - "packages/@glimmer/util/**"
       - "packages/@glimmer/wire-format/**"
-      - "packages/@handlebars/parser/**"
   pull_request:
     paths:
       - ".github/workflows/glimmer-syntax-prettier-smoke-test.yml"
@@ -27,7 +26,6 @@ on:
       - "packages/@glimmer/interfaces/**"
       - "packages/@glimmer/util/**"
       - "packages/@glimmer/wire-format/**"
-      - "packages/@handlebars/parser/**"
   workflow_dispatch:
 
 permissions:
@@ -63,6 +61,10 @@ jobs:
         working-directory: prettier-repo
         run: yarn add "@glimmer/syntax@file:${{ github.workspace }}/glimmer-syntax.tgz"
 
+      - name: Update error snapshots (our error messages differ from Jison's verbose format)
+        working-directory: prettier-repo
+        run: yarn jest --updateSnapshot tests/format/handlebars/_errors_/
+
       - name: Run prettier handlebars tests
         working-directory: prettier-repo
         run: yarn jest tests/format/handlebars

.github/workflows/smoke-test-app-template-updates.yml

@@ -12,14 +12,20 @@ jobs:
   gate:
     name: Gate to every 10 weeks
     runs-on: ubuntu-latest
+    outputs:
+      should_run: ${{ steps.check.outputs.should_run }}
     steps:
       - name: Check schedule
+        id: check
         run: |
           set -euo pipefail
           week=$(date +%V)
           if [ $((10#$week % 10)) -ne 0 ]; then
             echo "Skipping: ISO week $week is not a 10-week interval."
-            exit 0
+            echo "should_run=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "Running: ISO week $week is a 10-week interval."
+            echo "should_run=true" >> "$GITHUB_OUTPUT"
           fi
 
   update-app-template:
@@ -29,6 +35,7 @@ jobs:
       contents: write
       pull-requests: write
     needs: gate
+    if: needs.gate.outputs.should_run == 'true'
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
@@ -38,7 +45,7 @@ jobs:
         with:
           node-version: 20
       - name: Setup pnpm
-        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
+        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
       - name: Generate ember-test-app using classic blueprint
         run: |
           set -euo pipefail
@@ -68,6 +75,7 @@ jobs:
     name: Regenerate smoke-tests v2 app template
     runs-on: ubuntu-latest
     needs: gate
+    if: needs.gate.outputs.should_run == 'true'
     permissions:
       contents: write
       pull-requests: write
@@ -80,7 +88,7 @@ jobs:
         with:
           node-version: 20
       - name: Setup pnpm
-        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
+        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
       - name: Generate v2-app-template
         run: |
           set -euo pipefail

.gitignore

@@ -17,6 +17,7 @@ assets/bpm_libs.js
 assets/bpm_styles.css
 coverage
 dist
+dist-prod
 /docs
 lib/*/tests/all.js
 lib/*/tests/qunit*

.prettierignore

@@ -7,8 +7,6 @@ docs/
 **/smoke-tests/
 **/types/
 **/type-tests/
-packages/@handlebars/**/*.l
-packages/@handlebars/**/*.yy
 CHANGELOG.md
 package.json
 pnpm-lock.yaml

CHANGELOG.md

@@ -1,12 +1,45 @@
 # Ember Changelog
 
-## v6.12.0-beta.2 (March 9, 2026)
+## v7.0.0-beta.1 (March 31, 2026)
+
+- [#21240](https://github.com/emberjs/ember.js/pull/21240) [CLEANUP] Remove deprecated amd bundles and `use-ember-modules` optional feature per [RFC #1101](https://rfcs.emberjs.com/id/1101-deprecate-ember-vendor-bundles).
+- [#21275](https://github.com/emberjs/ember.js/pull/21275) [CLEANUP] Remove ember barrel file (`import Ember from 'ember'`) per [RFC #1003](https://rfcs.emberjs.com/id/1003-deprecation-import-ember-from-ember).
+- [#21056](https://github.com/emberjs/ember.js/pull/21056) [CLEANUP] Remove '@ember/application's lazy load / onLoad stuff (private API)
+- [#21058](https://github.com/emberjs/ember.js/pull/21058) [CLEANUP] Remove template-compiler bootstrap for script tags
+- [#21198](https://github.com/emberjs/ember.js/pull/21198) [CLEANUP] Remove `_globalsMode` and `_prepareForGlobalsMode` from `Application`
+- [#21079](https://github.com/emberjs/ember.js/pull/21079) [CLEANUP] Remove some IE11 support (Symbols)
+- [#21204](https://github.com/emberjs/ember.js/pull/21204) [CLEANUP] Remove old browser workarounds
+- [#21206](https://github.com/emberjs/ember.js/pull/21206) [CLEANUP] Remove unused exports, variables, imports and dependencies
+- [#21257](https://github.com/emberjs/ember.js/pull/21257) [CLEANUP] Remove old testing apis.
+- [#21067](https://github.com/emberjs/ember.js/pull/21067) [BUGFIX] Remove @ember/runloop from initializer test blueprints
+- [#21076](https://github.com/emberjs/ember.js/pull/21076) [BUGFIX] Support default globals for strict mode with the runtime compiler per [RFC #1070](https://rfcs.emberjs.com/id/1070-default-globals-for-strict-mode/).
+- [#21098](https://github.com/emberjs/ember.js/pull/21098) [BUGFIX] Add support for `this` in explicit scope for the runtime template compiler.
+- [#21107](https://github.com/emberjs/ember.js/pull/21107) [BUGFIX] Fix LinkTo inside inline SVG reloads application
+- [#21108](https://github.com/emberjs/ember.js/pull/21108) [BUGFIX] Fix unhelpful error message when the function for on modifier was forgotten as param.
+- [#21109](https://github.com/emberjs/ember.js/pull/21109) [BUGFIX] Fix missing value attribute on radio/checkbox inputs bound to empty string
+- [#21122](https://github.com/emberjs/ember.js/pull/21122) [BUGFIX] Fix tracked collections delete() returning true for non-existent entries
+- [#21124](https://github.com/emberjs/ember.js/pull/21124) [BUGFIX] Fix {{#each}} runtime crash when array contains null/undefined items with key
+- [#21125](https://github.com/emberjs/ember.js/pull/21125) [BUGFIX] Fix crash when accessing negative index of helper positional args #20912
+- [#21128](https://github.com/emberjs/ember.js/pull/21128) [BUGFIX] Fix trackedMap and trackedWeakMap reactivity for existing keys
+- [#21139](https://github.com/emberjs/ember.js/pull/21139) [BUGFIX] Port BrandedArray fix for Array-as-parent bug in destroyables
+- [#21168](https://github.com/emberjs/ember.js/pull/21168) [BUGFIX] Fix EmberArray.reduce to match native behavior
+- [#21189](https://github.com/emberjs/ember.js/pull/21189) [BUGFIX] Clear stale metadata references after destruction to allow GC
+- [#21202](https://github.com/emberjs/ember.js/pull/21202) [BUGFIX] Fix `<LinkTo>`'s `@current-when` argument with nested routes containing dynamic segments
+- [#21211](https://github.com/emberjs/ember.js/pull/21211) Pull router_js into the Ember monorepo
+- [#21069](https://github.com/emberjs/ember.js/pull/21069) Internalize @handlebars/parser
+- [#21129](https://github.com/emberjs/ember.js/pull/21129) Add prod build via package.json#exports
+- [#21141](https://github.com/emberjs/ember.js/pull/21141) Run smoke-tests with and without deprecations removed
+- [#21147](https://github.com/emberjs/ember.js/pull/21147) Migrate node tests to scenarios
+- [#21169](https://github.com/emberjs/ember.js/pull/21169) Migrate smoke tests to use ESM Ember -- ES'Mber
+- [#21173](https://github.com/emberjs/ember.js/pull/21173) Update actions + lock down to shas
+- [#21185](https://github.com/emberjs/ember.js/pull/21185) Use zizmor to lint actions & workflows
+- [#21188](https://github.com/emberjs/ember.js/pull/21188) Prepare @glimmer/syntax publishing again and add smoke tests for prettier's use of it
+- [#21234](https://github.com/emberjs/ember.js/pull/21234) Refactor tracked collections to use Proxy-based approach
+
+## v6.12.0 (March 31, 2026)
 
-- [#21144](https://github.com/emberjs/ember.js/pull/21144) [BUGFIX] Fix crash *during* destroy in fastboot
-
-## v6.12.0-beta.1 (February 17, 2026)
 - [#20908](https://github.com/emberjs/ember.js/pull/20908) / [#21020](https://github.com/emberjs/ember.js/pull/21020) Merge [glimmerjs/glimmer-vm](https://github.com/glimmerjs/glimmer-vm) into the `emberjs/ember.js` monorepo.
-  - All `@glimmer/*` packages that were formerly dependencies of `ember-source` are now included in the monorepo. This enables us to more easily iterate 
+  - All `@glimmer/*` packages that were formerly dependencies of `ember-source` are now included in the monorepo. This enables us to more easily iterate
     on the Glimmer VM and related packages, avoid an integration step with `ember.js` and to more easily share code between them and `ember-source`.
   - Only a few of the packages from the `glimmer-vm` repo will continue to be published as separate packages, for example, `@glimmer/syntax` will be published.
   - The `glimmer-vm` repo has been archived and relevant issues have been moved to the `emberjs/ember.js` repo. If you have an issue that was not moved, please reopen it on ember.js, after a search.
@@ -20,6 +53,17 @@
 - [#21046](https://github.com/emberjs/ember.js/pull/21046) Add benchmark infrastructure
 - [#21090](https://github.com/emberjs/ember.js/pull/21090) Swap nightly ts test of ts-nightly with ts-latest for better signal-to-noise
 
+## v6.8.4 (March 27, 2026)
+
+- [#20574](https://github.com/emberjs/ember.js/pull/20574) [BUGFIX] Update ApplicationInstance#visit to use `followRedirects()` to fix `visit()` throws `TransitionAborted` error
+- [#21144](https://github.com/emberjs/ember.js/pull/21144) [BUGFIX] Fix crash *during* destroy in fastboot
+
+## v6.11.1 (March 27, 2026)
+
+- [#20574](https://github.com/emberjs/ember.js/pull/20574) [BUGFIX] Update ApplicationInstance#visit to use `followRedirects()` to fix `visit()` throws `TransitionAborted` error
+- [#21144](https://github.com/emberjs/ember.js/pull/21144) [BUGFIX] Fix crash *during* destroy in fastboot
+- [#21244](https://github.com/emberjs/ember.js/pull/21244) [BUGFIX] Fix implicit-modules naming to fix use of `use-ember-modules` with a classic build
+
 ## v6.11.0 (February 17, 2026)
 
 - [#21024](https://github.com/emberjs/ember.js/pull/21024) [Bugfix] Add @ember/reactive into the AMD bundles