diff --git a/.github/scripts/update_pr_description.py b/.github/scripts/update_pr_description.py
new file mode 100644
index 0000000..e929c68
--- /dev/null
+++ b/.github/scripts/update_pr_description.py
@@ -0,0 +1,32 @@
+from os import environ
+from re import sub
+
+from github import Github
+
+token = environ['GITHUB_TOKEN']
+repo_name = environ['GITHUB_REPOSITORY']
+pr_number = int(environ['PR_NUMBER'])
+preview_url = environ['PREVIEW_URL']
+
+gh = Github(token)
+repo = gh.get_repo(repo_name)
+pr = repo.get_pull(pr_number)
+
+preview_label = '📚 Documentation preview 📚: '
+preview_text = f'{preview_label} {preview_url}'
+current_body = pr.body or ''
+
+if preview_label in current_body:
+    new_body = sub(
+        f'{preview_label}.*',
+        preview_text,
+        current_body,
+    )
+else:
+    new_body = (
+        f'{current_body}'
+        '\n\n---\n\n'
+        f'{preview_text}'
+    )
+
+pr.edit(body=new_body)
diff --git a/.github/workflows/publish-preview.yml b/.github/workflows/publish-preview.yml
index 5635d7f..8575aa6 100644
--- a/.github/workflows/publish-preview.yml
+++ b/.github/workflows/publish-preview.yml
@@ -10,48 +10,45 @@ jobs:
     steps:
       - name: Checkout PR branch
         uses: actions/checkout@v4
-      
+
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.14'
-      
+          python-version: "3.13"
+
       - name: Install dependencies
         run: |
           pip install \
           jupyter-book \
-          ghp-import
-      
+          ghp-import \
+          PyGithub 
+
       - name: Build the book
         run: |
           jupyter-book build content/
-      
-      - name: Get PR number
-        id: pr-info
-        run: |
-          echo "number=pr-${{ github.event.pull_request.number }}" >> $GITHUB_OUTPUT
 
       - name: Deploy with ghp-import
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
+          
+          # Fetch gh-pages branch to preserve existing content
+          git fetch origin gh-pages:gh-pages
+
           ghp-import \
             --no-jekyll \
             --push \
             --force \
-            --message "Deploy preview for ${{ steps.pr-info.outputs.number}}" \
+            --message "Deploy preview for ${{github.event.pull_request.number}}" \
             --branch gh-pages \
             --remote origin \
-            --prefix=preview/pr-${{ steps.pr-info.outputs.number}} \
+            --prefix=preview/pr-${{github.event.pull_request.number}} \
             content/_build/html
 
-      - name: Comment PR with preview link
-        uses: actions/github-script@v7
-        with:
-          script: |
-            github.rest.issues.createComment({
-              issue_number: context.issue.number,
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              body: 'Preview deployed to: https://${{ github.repository_owner }}.github.io/learn.scientific-python.org/preview/${{ steps.pr-info.outputs.number }}/'
-            })
+      - name: Add preview link to PR
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          PREVIEW_URL: https://${{ github.repository_owner }}.github.io/learn.scientific-python.org/preview/pr-${{ github.event.pull_request.number }}/
+        run: python .github/scripts/update_pr_description.py
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index b342058..a9e3db6 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.14'
+          python-version: "3.14"
 
       - name: Install dependencies
         run: pip install jupyter-book ghp-import
@@ -34,7 +34,7 @@ jobs:
 
           # Fetch gh-pages branch to avoid conflicts
           git fetch origin gh-pages:gh-pages
-                    
+
           ghp-import \
             --no-jekyll \
             --push \