diff --git a/.github/workflows/claude.yaml b/.github/workflows/claude.yaml
index a21cf17..48f07bf 100644
--- a/.github/workflows/claude.yaml
+++ b/.github/workflows/claude.yaml
@@ -20,7 +20,7 @@ jobs:
   # Auto-review for same-repo PRs
   claude-review:
     if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
+    runs-on: warp-ubuntu-latest-x64-8x
     steps:
       - uses: actions/checkout@v6
         with:
@@ -55,8 +55,9 @@ jobs:
     if: |
       github.event_name == 'issue_comment' &&
       github.event.issue.pull_request &&
-      contains(github.event.comment.body, '@claude review')
-    runs-on: ubuntu-latest
+      contains(github.event.comment.body, '@claude review') &&
+      contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.comment.author_association)
+    runs-on: warp-ubuntu-latest-x64-8x
     steps:
       - uses: actions/checkout@v6
         with:
@@ -91,13 +92,20 @@ jobs:
             - Only use inline comments for problems, not praise.
 
   # General interactive mode - responds to @claude mentions (but NOT review requests on PRs)
+  # Restricted to users with write access (OWNER, MEMBER, COLLABORATOR)
   claude-response:
     if: |
-      (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude') && !contains(github.event.comment.body, '@claude review')) ||
-      (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude') && !contains(github.event.comment.body, '@claude review')) ||
-      (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude') && !contains(github.event.review.body, '@claude review')) ||
-      (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
-    runs-on: ubuntu-latest
+      (
+        contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.comment.author_association) ||
+        contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.review.author_association) ||
+        contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.issue.author_association)
+      ) && (
+        (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude'))) ||
+        (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
+        (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude') && !contains(github.event.comment.body, '@claude review')) ||
+        (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude') && !contains(github.event.review.body, '@claude review'))
+      )
+    runs-on: warp-ubuntu-latest-x64-8x
     steps:
       - uses: actions/checkout@v6
         with: