diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f97f0b9..b2ea1b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,13 +9,14 @@ permissions:
 
 jobs:
   build_pack_android:
-    runs-on: ubuntu-latest
+    # Pinned: on ubuntu-26.04 (ubuntu-latest since Oct 2026) the android workload install fails with "Disk quota exceeded".
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: "10.0.x"
+          dotnet-version: "10.0.203"
 
       - name: Validate feature selection
         run: bash tests/validate-feature-selection.sh
@@ -26,11 +27,15 @@ jobs:
           java-version: "21"
 
       - name: Setup Android SDK
-        uses: android-actions/setup-android@v3
+        uses: android-actions/setup-android@v4
+        with:
+          # Pinned like the consuming app: the default 'tools' package no longer exists.
+          cmdline-tools-version: '12266719'
+          packages: 'platform-tools'
 
       - name: Install Android workload
         run: |
-          dotnet workload install android
+          dotnet workload install android --version 10.0.203
 
       - name: Cache NuGet
         uses: actions/cache@v4
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index b9c92ce..8218a2a 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -17,7 +17,8 @@ permissions:
 
 jobs:
   pack_and_publish:
-    runs-on: ubuntu-latest
+    # Pinned: on ubuntu-26.04 (ubuntu-latest since Oct 2026) the android workload install fails with "Disk quota exceeded".
+    runs-on: ubuntu-24.04
     permissions:
       contents: read
       packages: write
@@ -69,7 +70,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: "10.0.x"
+          dotnet-version: "10.0.203"
 
       - name: Validate feature selection
         run: bash tests/validate-feature-selection.sh
@@ -80,11 +81,15 @@ jobs:
           java-version: "21"
 
       - name: Setup Android SDK
-        uses: android-actions/setup-android@v3
+        uses: android-actions/setup-android@v4
+        with:
+          # Pinned like the consuming app: the default 'tools' package no longer exists.
+          cmdline-tools-version: '12266719'
+          packages: 'platform-tools'
 
       - name: Install Android workload
         run: |
-          dotnet workload install android
+          dotnet workload install android --version 10.0.203
 
       - name: Cache NuGet
         uses: actions/cache@v4
diff --git a/.github/workflows/sample-android.yml b/.github/workflows/sample-android.yml
index 46bfd80..3c09242 100644
--- a/.github/workflows/sample-android.yml
+++ b/.github/workflows/sample-android.yml
@@ -8,13 +8,14 @@ permissions:
 
 jobs:
   build_android_sample:
-    runs-on: ubuntu-latest
+    # Pinned: on ubuntu-26.04 (ubuntu-latest since Oct 2026) the android workload install fails with "Disk quota exceeded".
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: "10.0.x"
+          dotnet-version: "10.0.203"
 
       - uses: actions/setup-java@v4
         with:
@@ -22,11 +23,15 @@ jobs:
           java-version: "21"
 
       - name: Setup Android SDK
-        uses: android-actions/setup-android@v3
+        uses: android-actions/setup-android@v4
+        with:
+          # Pinned like the consuming app: the default 'tools' package no longer exists.
+          cmdline-tools-version: '12266719'
+          packages: 'platform-tools'
 
       - name: Install Android workload
         run: |
-          dotnet workload install android
+          dotnet workload install android --version 10.0.203
 
       - name: Cache NuGet
         uses: actions/cache@v4