chore: test yarn modern

.github/actions/run-publish-vr-screenshot/action.yml

@@ -38,7 +38,7 @@ runs:
         cache: 'yarn'
         node-version: '20'
 
-    - run: yarn install --frozen-lockfile
+    - run: yarn install --immutable
       shell: bash
 
     - run: yarn playwright install --with-deps

.github/workflows/bundle-size-base.yml

@@ -16,6 +16,10 @@ env:
 
   BROWSERSLIST_IGNORE_OLD_DATA: true
 
+  # Use project-local cache to avoid stale global Berry cache on CI
+  # where workspace packages may collide with published npm versions
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 jobs:
   bundle-size-base:
     if: ${{ github.repository_owner == 'microsoft' }}
@@ -31,7 +35,7 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Build all packages & create reports (non-PR)
         run: yarn nx run-many -t bundle-size --nxBail

.github/workflows/bundle-size.yml

@@ -14,10 +14,15 @@ env:
 
   BROWSERSLIST_IGNORE_OLD_DATA: true
 
+  # Use project-local cache to avoid stale global Berry cache on CI
+  # where workspace packages may collide with published npm versions
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 jobs:
   bundle-size:
-    if: ${{ github.repository_owner == 'microsoft' }}
-    runs-on: macos-14-xlarge
+    # if: ${{ github.repository_owner == 'microsoft' }}
+    # runs-on: macos-14-xlarge
+    runs-on: ubuntu-latest
     permissions:
       contents: 'read'
       actions: 'read'
@@ -39,7 +44,7 @@ jobs:
 
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Build packages & create reports
         run: yarn nx affected -t bundle-size --nxBail

.github/workflows/check-packages.yml

@@ -2,10 +2,15 @@ name: Check packages
 on:
   pull_request:
 
+# Use project-local cache to avoid stale global Berry cache on CI
+# where workspace packages may collide with published npm versions
+env:
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 jobs:
   dependency-deduplication:
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'microsoft' }}
+    # if: ${{ github.repository_owner == 'microsoft' }}
     steps:
       - uses: actions/checkout@v6
         with:
@@ -16,6 +21,8 @@ jobs:
           node-version: '22'
           cache: 'yarn'
 
+      - run: yarn install --immutable
+
       - uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
         id: changed-files-specific
         with:
@@ -27,7 +34,7 @@ jobs:
         run: |
           echo "yarn.lock changed! Verifying package deduplication ..."
 
-          yarn run dedupe --list --fail
+          yarn run dedupe --check
 
           if [[ $? -ne 0 ]]; then
             echo "Your changes introduced package duplication 🚨"
@@ -38,7 +45,7 @@ jobs:
 
   dependency-mismatches:
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'microsoft' }}
+    # if: ${{ github.repository_owner == 'microsoft' }}
     steps:
       - uses: actions/checkout@v6
         with:
@@ -65,7 +72,7 @@ jobs:
 
   change-files:
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'microsoft' }}
+    # if: ${{ github.repository_owner == 'microsoft' }}
     steps:
       - uses: actions/checkout@v6
         with:

.github/workflows/check-tooling.yml

@@ -11,10 +11,11 @@ env:
   __FORCE_API_MD_UPDATE__: true
   __FORCE_SNAPSHOT_UPDATE__: true
   NX_VERBOSE_LOGGING: true
+  YARN_ENABLE_IMMUTABLE_INSTALLS: false
 
 jobs:
   check-tools:
-    if: ${{ github.repository_owner == 'microsoft' }}
+    # if: ${{ github.repository_owner == 'microsoft' }}
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
@@ -28,7 +29,7 @@ jobs:
         with:
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - run: yarn nx run scripts-executors:test -t 'smoke test'
 

.github/workflows/copilot-setup-steps.yml

@@ -4,6 +4,11 @@ name: 'Copilot Setup Steps'
 # Allow testing of the setup steps from your repository's "Actions" tab.
 on: workflow_dispatch
 
+# Use project-local cache to avoid stale global Berry cache on CI
+# where workspace packages may collide with published npm versions
+env:
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 jobs:
   # The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
   copilot-setup-steps:
@@ -29,4 +34,4 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable

.github/workflows/docsite-publish-ghpages.yml

@@ -7,6 +7,11 @@ on:
       - master
   workflow_dispatch:
 
+# Use project-local cache to avoid stale global Berry cache on CI
+# where workspace packages may collide with published npm versions
+env:
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -29,7 +34,7 @@ jobs:
           cache: 'yarn'
 
       - name: Install packages
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
 
       - name: Install Playwright Browsers
         run: yarn playwright install --with-deps

.github/workflows/pr-housekeeping.yml

@@ -9,7 +9,7 @@ permissions:
 
 jobs:
   label:
-    if: ${{ github.repository_owner == 'microsoft' }}
+    # if: ${{ github.repository_owner == 'microsoft' }}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/labeler@v6

.github/workflows/pr-vrt.yml

@@ -15,14 +15,19 @@ env:
   NX_PREFER_TS_NODE: true
   NX_VERBOSE_LOGGING: true
 
+  # Use project-local cache to avoid stale global Berry cache on CI
+  # where workspace packages may collide with published npm versions
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 permissions:
   contents: 'read'
   actions: 'read'
 
 jobs:
   generate_vrt_screenshots:
-    if: ${{ github.repository_owner == 'microsoft' }}
-    runs-on: macos-14-xlarge
+    # if: ${{ github.repository_owner == 'microsoft' }}
+    # runs-on: macos-14-xlarge
+    runs-on: ubuntu-latest
     name: Generate screenshots
     timeout-minutes: 60
     steps:
@@ -40,7 +45,7 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
       - run: yarn playwright install --with-deps
 
       - name: Run VR tests (generate screenshots)

.github/workflows/pr-website-deploy.yml

@@ -14,6 +14,10 @@ env:
 
   BROWSERSLIST_IGNORE_OLD_DATA: true
 
+  # Use project-local cache to avoid stale global Berry cache on CI
+  # where workspace packages may collide with published npm versions
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 jobs:
   bundle:
     if: ${{ github.repository_owner == 'microsoft' }}
@@ -41,7 +45,7 @@ jobs:
       - name: NodeJS heap default size
         run: node -e 'console.log(v8.getHeapStatistics().heap_size_limit / 1024 / 1024 + " MB");'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Install Playwright Browsers
         run: yarn playwright install --with-deps

.github/workflows/pr.yml

@@ -17,14 +17,19 @@ env:
 
   BROWSERSLIST_IGNORE_OLD_DATA: true
 
+  # Use project-local cache to avoid stale global Berry cache on CI
+  # where workspace packages may collide with published npm versions
+  YARN_ENABLE_GLOBAL_CACHE: false
+
   DEPLOY_HOST: fluentuipr.z22.web.core.windows.net
   DEPLOY_URL: https://fluentuipr.z22.web.core.windows.net/${{ github.event.pull_request.number || github.ref_name }}
   DEPLOY_BASE_PATH: ${{ github.event.pull_request.number != '' && format('pull/{0}', github.event.pull_request.number) || format('heads/{0}', github.ref_name) }}
 
 jobs:
   main:
-    if: ${{ github.repository_owner == 'microsoft' }}
-    runs-on: macos-14-xlarge
+    # if: ${{ github.repository_owner == 'microsoft' }}
+    # runs-on: macos-14-xlarge
+    runs-on: ubuntu-latest
     permissions:
       contents: 'read'
       actions: 'read'
@@ -46,7 +51,10 @@ jobs:
 
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
+
+      - name: 'Check duplicates in yarn.lock'
+        run: yarn run dedupe --check --json
 
       - name: Workspace lint
         run: |
@@ -82,8 +90,9 @@ jobs:
           git diff-index --quiet HEAD -- || exit 1
 
   react-major-versions-integration:
-    if: ${{ github.repository_owner == 'microsoft' }}
-    runs-on: macos-14-xlarge
+    # if: ${{ github.repository_owner == 'microsoft' }}
+    # runs-on: macos-14-xlarge
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
         with:
@@ -102,9 +111,12 @@ jobs:
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
       - run: |
-          yarn install --frozen-lockfile
+          yarn install --immutable
+      - run: |
           yarn rit --react 17 --install-deps
           yarn rit --react 18 --install-deps
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
 
       - name: Verify Cypress installs from RIT temp workspaces (React 17 -> v13, React 18 -> v14)
         run: |
@@ -130,7 +142,7 @@ jobs:
           FLUENT_JEST_WORKER=2 yarn nx affected -t test-rit--17--type-check,test-rit--18--type-check,test-rit--17--test,test-rit--18--test --exclude='react-19-tests-v9'
 
   e2e:
-    if: ${{ github.repository_owner == 'microsoft' }}
+    # if: ${{ github.repository_owner == 'microsoft' }}
     # TODO: switch to macos once problematic tests are fixed
     # https://github.com/microsoft/fluentui/issues/33173
     # https://github.com/microsoft/fluentui/issues/33172
@@ -156,7 +168,7 @@ jobs:
 
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Install Playwright dependencies
         run: yarn playwright install --with-deps

.github/workflows/vrt-baseline.yml

@@ -10,6 +10,10 @@ env:
   NX_PREFER_TS_NODE: true
   NX_VERBOSE_LOGGING: true
 
+  # Use project-local cache to avoid stale global Berry cache on CI
+  # where workspace packages may collide with published npm versions
+  YARN_ENABLE_GLOBAL_CACHE: false
+
 permissions:
   contents: 'read'
   actions: 'read'
@@ -30,7 +34,7 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
       - run: yarn playwright install --with-deps
 
       - name: Run VR tests (generate screenshots)

.gitignore

@@ -47,6 +47,13 @@ $RECYCLE.BIN/
 dist.stats.json
 bower_components
 node_modules
+
+# Yarn (ignore everything except patches, plugins, and releases)
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+
 temp
 tmp
 lib