diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f2e32b50..14e73136 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   secret-scan:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: read
     steps:
@@ -20,7 +20,7 @@ jobs:
         uses: gacts/gitleaks@v1
 
   runtime-images:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: read
     steps:
@@ -30,8 +30,8 @@ jobs:
         uses: oven-sh/setup-bun@v1
         with:
           bun-version: "1.3.9"
-      - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Setup Blacksmith Builder
+        uses: useblacksmith/setup-docker-builder@v1
       - name: Install dependencies
         run: bun install
       - name: Build full runtime image
@@ -57,7 +57,7 @@ jobs:
         run: bash scripts/portable-container-smoke.sh hack-runtime-ci:slim linux/amd64
 
   test:
-    runs-on: macos-14
+    runs-on: blacksmith-6vcpu-macos-15
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/.github/workflows/release-macos-app.yml b/.github/workflows/release-macos-app.yml
index 42dc4653..a19fdcf1 100644
--- a/.github/workflows/release-macos-app.yml
+++ b/.github/workflows/release-macos-app.yml
@@ -39,7 +39,7 @@ env:
 
 jobs:
   build-and-notarize:
-    runs-on: macos-15
+    runs-on: blacksmith-6vcpu-macos-15
     permissions:
       contents: write
     steps:
diff --git a/.github/workflows/release-node-runtime-image.yml b/.github/workflows/release-node-runtime-image.yml
index 992cf3b4..ecc0250e 100644
--- a/.github/workflows/release-node-runtime-image.yml
+++ b/.github/workflows/release-node-runtime-image.yml
@@ -16,7 +16,7 @@ on:
 
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: read
       packages: write
@@ -32,8 +32,8 @@ jobs:
       - name: Setup QEMU
         uses: docker/setup-qemu-action@v3
 
-      - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Setup Blacksmith Builder
+        uses: useblacksmith/setup-docker-builder@v1
 
       - name: Login to Docker Hub
         uses: docker/login-action@v3
diff --git a/.github/workflows/release-prepare.yml b/.github/workflows/release-prepare.yml
index 9697ac16..e7690cf4 100644
--- a/.github/workflows/release-prepare.yml
+++ b/.github/workflows/release-prepare.yml
@@ -15,7 +15,7 @@ concurrency:
 
 jobs:
   semantic-release:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     env:
       FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
     steps:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fc5a14e4..592ee9b7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ on:
 
 jobs:
   create-release:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: write
     outputs:
@@ -66,7 +66,7 @@ jobs:
           - os: macos-15
             upload_install: false
             skip_tests: true
-          - os: macos-15-large
+          - os: blacksmith-6vcpu-macos-15
             upload_install: false
             skip_tests: true
     steps:
@@ -153,7 +153,7 @@ jobs:
 
   update-homebrew-tap:
     needs: [create-release, build]
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     permissions:
       contents: read
     steps: