diff --git a/.github/actions/install-dependencies/action.yml b/.github/actions/install-dependencies/action.yml
index 5f51f918c34b..052da6857343 100644
--- a/.github/actions/install-dependencies/action.yml
+++ b/.github/actions/install-dependencies/action.yml
@@ -22,7 +22,9 @@ runs:
       id: cache_dependencies
       with:
         path: ${{ env.CACHED_DEPENDENCY_PATHS }}
-        key: ${{ steps.compute_lockfile_hash.outputs.hash }}
+        key:
+          ${{ steps.compute_lockfile_hash.outputs.hash }}${{ runner.arch != 'X64' && format('-{0}', runner.arch) || ''
+          }}
 
     - name: Install dependencies
       if: steps.cache_dependencies.outputs.cache-hit != 'true'
diff --git a/.github/actions/restore-cache/action.yml b/.github/actions/restore-cache/action.yml
index daa5943f9877..372def6a0a7e 100644
--- a/.github/actions/restore-cache/action.yml
+++ b/.github/actions/restore-cache/action.yml
@@ -17,7 +17,7 @@ runs:
       uses: actions/cache/restore@v6.1.0
       with:
         path: ${{ env.CACHED_DEPENDENCY_PATHS }}
-        key: ${{ inputs.dependency_cache_key }}
+        key: ${{ inputs.dependency_cache_key }}${{ runner.arch != 'X64' && format('-{0}', runner.arch) || '' }}
 
     - name: Restore build artifacts
       uses: actions/download-artifact@v7
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9c408c806846..847d5bf8b1d0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -72,7 +72,7 @@ jobs:
   job_build:
     name: Build
     needs: job_get_metadata
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     timeout-minutes: 15
     if: |
       needs.job_get_metadata.outputs.changed_any_code == 'true' ||
@@ -128,7 +128,7 @@ jobs:
           path: |
             .nx/cache
             .nx/workspace-data
-          key: ${{ env.NX_CACHE_KEY }}
+          key: ${{ env.NX_CACHE_KEY }}-${{ runner.arch }}
 
       - name: Upload build artifacts
         uses: actions/upload-artifact@v7
@@ -215,7 +215,7 @@ jobs:
           path: |
             .nx/cache
             .nx/workspace-data
-          key: ${{ env.NX_CACHE_KEY }}
+          key: ${{ env.NX_CACHE_KEY }}-${{ runner.arch }}
 
       - name: Restore caches
         uses: ./.github/actions/restore-cache
@@ -238,7 +238,7 @@ jobs:
     name: Build bundles
     needs: [job_get_metadata, job_build]
     timeout-minutes: 10
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     steps:
       - name: Check out current commit (${{ needs.job_get_metadata.outputs.commit_label }})
         uses: actions/checkout@v7
@@ -254,7 +254,7 @@ jobs:
           path: |
             .nx/cache
             .nx/workspace-data
-          key: ${{ env.NX_CACHE_KEY }}
+          key: ${{ env.NX_CACHE_KEY }}-${{ runner.arch }}
 
       - name: Restore caches
         uses: ./.github/actions/restore-cache
@@ -292,7 +292,7 @@ jobs:
     name: Size Check
     needs: [job_get_metadata, job_build, job_build_bundles]
     timeout-minutes: 15
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     if:
       github.event_name == 'pull_request' || needs.job_get_metadata.outputs.is_base_branch == 'true' ||
       needs.job_get_metadata.outputs.is_release == 'true'
@@ -327,7 +327,7 @@ jobs:
     # inter-package dependencies resolve cleanly.
     needs: [job_get_metadata, job_build]
     timeout-minutes: 10
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     steps:
       - name: Check out current commit (${{ needs.job_get_metadata.outputs.commit_label }})
         uses: actions/checkout@v7
@@ -509,7 +509,7 @@ jobs:
     needs: [job_get_metadata, job_build]
     if: needs.job_build.outputs.changed_bun == 'true' || github.event_name != 'pull_request'
     timeout-minutes: 10
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     strategy:
       fail-fast: false
       matrix:
@@ -541,7 +541,7 @@ jobs:
     needs: [job_get_metadata, job_build]
     if: needs.job_build.outputs.changed_deno == 'true' || github.event_name != 'pull_request'
     timeout-minutes: 10
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     steps:
       - name: Check out current commit (${{ needs.job_get_metadata.outputs.commit_label }})
         uses: actions/checkout@v7
@@ -569,7 +569,7 @@ jobs:
     name: Node (${{ matrix.node }}) Unit Tests
     needs: [job_get_metadata, job_build]
     timeout-minutes: 10
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     # Node 27 is an alpha: its ABI and APIs can change, so its failures must not fail the required checks.
     continue-on-error: ${{ matrix.node == '^27.0.0-0' }}
     strategy:
@@ -776,6 +776,7 @@ jobs:
     name: Node (${{ matrix.node }}) Integration Tests (${{ matrix.shard }}/3)
     needs: [job_get_metadata, job_build]
     if: needs.job_build.outputs.changed_node_integration == 'true' || github.event_name != 'pull_request'
+    # The tedious suite uses a SQL Server container that requires x86-64.
     runs-on: ubuntu-24.04
     timeout-minutes: 20
     # Node 27 is an alpha: its ABI and APIs can change, so its failures must not fail the required checks.
@@ -868,7 +869,7 @@ jobs:
     if:
       needs.job_get_metadata.outputs.is_release != 'true' && (needs.job_build.outputs.changed_cloudflare_integration ==
       'true' || github.event_name != 'pull_request')
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     timeout-minutes: 15
     strategy:
       fail-fast: false
@@ -881,7 +882,7 @@ jobs:
     name: Bundler Plugin Integration Tests (Node ${{ matrix.node }})
     needs: [job_get_metadata, job_build]
     if: needs.job_build.outputs.changed_bundler_plugin_integration == 'true' || github.event_name != 'pull_request'
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     timeout-minutes: 15
     # Node 27 is an alpha: its ABI and APIs can change, so its failures must not fail the required checks.
     continue-on-error: ${{ matrix.node == '^27.0.0-0' }}
@@ -911,6 +912,7 @@ jobs:
     name: Bun (${{ matrix.bun }}) Integration Tests (${{ matrix.shard }}/2)
     needs: [job_get_metadata, job_build]
     if: needs.job_build.outputs.changed_bun_integration == 'true' || github.event_name != 'pull_request'
+    # Shared Node suites include the x86-only SQL Server container.
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     strategy:
@@ -945,6 +947,7 @@ jobs:
     name: Deno Integration Tests (${{ matrix.shard }}/2)
     needs: [job_get_metadata, job_build]
     if: needs.job_build.outputs.changed_deno_integration == 'true' || github.event_name != 'pull_request'
+    # Shared Node suites include the x86-only SQL Server container.
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     strategy:
@@ -990,7 +993,7 @@ jobs:
       always() &&
       needs.job_build.result == 'success'
     needs: [job_get_metadata, job_build]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-24.04-arm
     timeout-minutes: 15
     steps:
       - name: Check out current commit (${{ needs.job_get_metadata.outputs.commit_label }})
@@ -1007,7 +1010,7 @@ jobs:
           path: |
             .nx/cache
             .nx/workspace-data
-          key: ${{ env.NX_CACHE_KEY }}
+          key: ${{ env.NX_CACHE_KEY }}-${{ runner.arch }}
 
       - name: Restore caches
         uses: ./.github/actions/restore-cache