diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index e860993..2a7412e 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -18,7 +18,7 @@ jobs:
     #   github.event.pull_request.user.login == 'new-developer' ||
     #   github.event.pull_request.author_association == 'FIRST_TIME_CONTRIBUTOR'
 
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     permissions:
       contents: read
       pull-requests: write
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: useblacksmith/checkout@v1
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index d467bbc..ad006f6 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -17,7 +17,7 @@ jobs:
       (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '/claude')) ||
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '/claude')) ||
       (github.event_name == 'issues' && (contains(github.event.issue.body, '/claude') || contains(github.event.issue.title, '/claude')))
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     permissions:
       contents: read
       pull-requests: write
@@ -26,7 +26,7 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: useblacksmith/checkout@v1
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 27e8374..cd75024 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,11 +17,11 @@ concurrency:
 
 jobs:
   validate:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: useblacksmith/checkout@v1
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
@@ -66,13 +66,13 @@ jobs:
       matrix:
         include:
           - name: Linux x86-64
-            runner: ubuntu-latest
+            runner: blacksmith-2vcpu-ubuntu-2404
           - name: Linux arm64
-            runner: ubuntu-24.04-arm
+            runner: blacksmith-2vcpu-ubuntu-2404-arm
           - name: macOS x86-64
-            runner: macos-15-intel
+            runner: blacksmith-6vcpu-macos-latest
           - name: macOS arm64
-            runner: macos-15
+            runner: blacksmith-6vcpu-macos-latest
 
     steps:
       - name: Checkout code
diff --git a/.github/workflows/release-snapshot.yml b/.github/workflows/release-snapshot.yml
index b66142d..7c3e74a 100644
--- a/.github/workflows/release-snapshot.yml
+++ b/.github/workflows/release-snapshot.yml
@@ -37,14 +37,14 @@ concurrency:
 jobs:
   release-snapshot:
     name: GoReleaser snapshot
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     # The before hooks download sidecars from third-party hosts, so a stalled
     # request must not be allowed to burn an hour of runner time.
     timeout-minutes: 20
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: useblacksmith/checkout@v1
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 45e9300..cf56546 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   release:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     timeout-minutes: 45
 
     steps:
@@ -25,7 +25,7 @@ jobs:
 
       - name: Checkout release commit
         if: ${{ steps.release.outputs.release_created }}
-        uses: actions/checkout@v6
+        uses: useblacksmith/checkout@v1
         with:
           fetch-depth: 0
           ref: ${{ steps.release.outputs.tag_name }}