diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index 4fb9265..8853248 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: read
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 6b15fac..bb81316 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: read
diff --git a/.github/workflows/perf.yaml b/.github/workflows/perf.yaml
index 7d6982e..eb35e1e 100644
--- a/.github/workflows/perf.yaml
+++ b/.github/workflows/perf.yaml
@@ -39,7 +39,7 @@ concurrency:
 jobs:
   track-perf:
     name: shelltime track latency
-    runs-on: ubuntu-24.04
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     timeout-minutes: 30
     permissions:
       contents: read
diff --git a/.github/workflows/pr-check.yaml b/.github/workflows/pr-check.yaml
index 8066b54..2f0b9a8 100644
--- a/.github/workflows/pr-check.yaml
+++ b/.github/workflows/pr-check.yaml
@@ -15,7 +15,7 @@ permissions:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 66b8bd3..9e3d06c 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   goreleaser:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-2vcpu-ubuntu-2404
     environment: CI
     steps:
       - uses: googleapis/release-please-action@v4