diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a8882ba61..9b15674e1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -41,7 +41,7 @@ jobs:
     env:
       VERSION: v0.0.1-test
       SUBSTRATE_VERSION: 0.0.22
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     timeout-minutes: 30
     steps:
       - name: Checkout repository
@@ -69,14 +69,8 @@ jobs:
         # See https://github.com/openai/codex/issues/14919
         run: |
           sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0 || true
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
-        with:
-          name: ${{ env.BUILDX_BUILDER_NAME }}
-          version: ${{ env.BUILDX_VERSION }}
-          platforms: linux/amd64
-          use: "true"
-          driver-opts: network=host
+      - name: Setup Blacksmith Builder
+        uses: useblacksmith/setup-docker-builder@v1
 
       - name: Set up Helm
         uses: azure/setup-helm@v5.0.1
@@ -209,7 +203,7 @@ jobs:
       - setup
     env:
       VERSION: v0.0.1-test
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     strategy:
       fail-fast: false
       matrix:
@@ -255,7 +249,7 @@ jobs:
       - setup
     env:
       VERSION: v0.0.1-test
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     strategy:
       fail-fast: false
       matrix:
@@ -348,7 +342,7 @@ jobs:
           helm unittest helm/tools/grafana-mcp
 
   ui-tests:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: read
       pull-requests: write
@@ -415,7 +409,7 @@ jobs:
           - golang-adk
           - claude-harness
           - codex-harness
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     services:
       registry:
         image: registry:2
@@ -428,14 +422,8 @@ jobs:
         uses: docker/setup-qemu-action@v4
         with:
           platforms: linux/amd64,linux/arm64
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
-        with:
-          name: ${{ env.BUILDX_BUILDER_NAME }}
-          platforms: linux/amd64,linux/arm64
-          version: ${{ env.BUILDX_VERSION }}
-          use: "true"
-          driver-opts: network=host
+      - name: Setup Blacksmith Builder
+        uses: useblacksmith/setup-docker-builder@v1
       - name: Run make build
         env:
           BUILDX_BUILDER_NAME: ${{ env.BUILDX_BUILDER_NAME }}
diff --git a/.github/workflows/image-scan.yaml b/.github/workflows/image-scan.yaml
index ac6bfed76..e09854a9d 100644
--- a/.github/workflows/image-scan.yaml
+++ b/.github/workflows/image-scan.yaml
@@ -48,7 +48,7 @@ jobs:
           - build_target: codex-harness
             image_name: codex-harness
             tag_suffix: ""
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     services:
       registry:
         image: registry:2
@@ -59,14 +59,8 @@ jobs:
         uses: actions/checkout@v6
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v4
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
-        with:
-          name: ${{ env.BUILDX_BUILDER_NAME }}
-          version: ${{ env.BUILDX_VERSION }}
-          platforms: linux/amd64,linux/arm64
-          use: 'true'
-          driver-opts: network=host
+      - name: Setup Blacksmith Builder
+        uses: useblacksmith/setup-docker-builder@v1
       - name: Set version
         id: vars
         run: echo "version=v0.0.0-$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
diff --git a/.github/workflows/tag.yaml b/.github/workflows/tag.yaml
index a2d2811d6..bedb7decc 100644
--- a/.github/workflows/tag.yaml
+++ b/.github/workflows/tag.yaml
@@ -23,7 +23,7 @@ jobs:
           - golang-adk
           - claude-harness
           - codex-harness
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     permissions:
       contents: read
       packages: write