diff --git a/.github/workflows/claude-review.yml b/.github/workflows/claude-review.yml
index 9dccd59..d80ece9 100644
--- a/.github/workflows/claude-review.yml
+++ b/.github/workflows/claude-review.yml
@@ -1,39 +1,43 @@
 name: Claude PR Review
 on:
   pull_request:
-
-# Cancel in-progress reviews for the same PR when a new push arrives.
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
   cancel-in-progress: true
-
 jobs:
   claude-review:
     name: Claude PR Review
     runs-on: ubuntu-latest
-
-    # Prevent running on fork PRs where secrets are unavailable
     if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
-
     permissions:
       contents: read
       pull-requests: write
-      id-token: write # OIDC token for Claude GitHub App auth
-
+      issues: write
     steps:
       - uses: actions/checkout@v4
-
       - uses: anthropics/claude-code-action@v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
-          prompt: "/review"
-          # Pre-loads full PR context and shows a progress tracker.
-          track_progress: true
-          # Only include comments from trusted team members in Claude's context (prompt injection mitigation).
-          include_comments_by_actor: "mmiermans"
-          # Update the same comment on each push instead of creating new ones.
-          use_sticky_comment: true
-          # Inline code comments, PR comments, reading PR diffs, and git log for commit messages.
-          # gh pr view is excluded to prevent Claude from fetching PR comments (prompt injection risk).
+          github_token: ${{ github.token }}
+          prompt: |
+            You are an automated code reviewer for pull request #${{ github.event.pull_request.number }} in ${{ github.repository }}.
+            Read the changes: gh pr diff ${{ github.event.pull_request.number }}. Review concisely for bugs, security, performance, quality, tests, docs. Do not invent issues.
+            Write the review to review.md. Its FIRST line must be the exact hidden marker (an invisible HTML comment):
+            <!-- claude-review -->
+            followed immediately by one collapsed details block:
+            <details>
+            <summary>🤖 Claude has reviewed this PR — expand after forming your own opinion</summary>
+
+            (your full review)
+
+            </details>
+            Nothing VISIBLE may appear outside the details block (the marker renders invisibly).
+            STICKY DELIVERY — keep ONE comment across runs. Find any prior review comment carrying the marker:
+              ID=$(gh api repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments --jq '[.[] | select(.user.login=="github-actions[bot]" and (.body | contains("<!-- claude-review -->")))] | last | .id // empty')
+            If ID is non-empty, UPDATE that comment:
+              gh api -X PATCH repos/${{ github.repository }}/issues/comments/$ID -f body="$(cat review.md)"
+            Otherwise create a new comment:
+              gh pr comment ${{ github.event.pull_request.number }} --body-file review.md
+            No inline comments, no approve/request-changes, no AI attribution.
           claude_args: |
-            --allowedTools "mcp__github_inline_comment__create_inline_comment,Bash(gh pr comment:*),Bash(gh pr diff:*),Bash(git log:*)"
+            --allowedTools "Bash(gh pr diff:*),Bash(gh pr comment:*),Bash(gh api:*)"
diff --git a/webclient/resources/js/exp-stick-marker.js b/webclient/resources/js/exp-stick-marker.js
new file mode 100644
index 0000000..afefc8d
--- /dev/null
+++ b/webclient/resources/js/exp-stick-marker.js
@@ -0,0 +1,4 @@
+// helper for sticky-review experiment
+function pct(part, total) {
+  return (part / total) * 100;  // no guard for total === 0
+}