adding PR test for changelog entry

.github/workflows/change-log.yml

@@ -0,0 +1,60 @@
+# yaml
+name: Check changelog entry
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+jobs:
+  check-changelog:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Determine changed files and require changelog update
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          PR_BASE_REF: ${{ github.event.pull_request.base.ref || '' }}
+          BEFORE: ${{ github.event.before }}
+          SHA: ${{ github.sha }}
+        run: |
+          set -euo pipefail
+
+          echo "Event: $EVENT_NAME"
+
+          if [ "$EVENT_NAME" = "pull_request" ]; then
+            if [ -z "$PR_BASE_REF" ]; then
+              echo "Pull request base ref not provided."
+              exit 1
+            fi
+            echo "Fetching base ref origin/$PR_BASE_REF"
+            if ! git fetch origin "$PR_BASE_REF":refs/remotes/origin/"$PR_BASE_REF"; then
+              echo "::error::Failed to fetch pull request base ref origin/$PR_BASE_REF."
+              exit 1
+            fi
+            changed=$(git diff --name-only "origin/$PR_BASE_REF...HEAD")
+          else
+            if [ "$BEFORE" = "0000000000000000000000000000000000000000" ]; then
+              # new branch or forced push: list files in the commit
+              changed=$(git show --name-only --pretty="" "$SHA")
+            else
+              changed=$(git diff --name-only "$BEFORE...$SHA")
+            fi
+          fi
+
+          echo "Changed files:"
+          echo "$changed" | sed 's/^/ - /'
+
+          # match: CHANGELOG.md, NEWS.md, any file under changelog(s)/ or docs/changelog/
+          echo "$changed" | grep -E '(^CHANGELOG\.md$|^NEWS\.md$|(^|/)changelog(/|$)|(^|/)changelogs(/|$)|(^|/)docs/changelog(/|$))' >/dev/null 2>&1 || {
+            echo "::error::No changelog changes detected."
+            echo "Please add or update a changelog entry (e.g. update `CHANGELOG.md` or add a file under `changelog/`)."
+            exit 1
+          }
+
+          echo "Changelog change detected. OK."

CHANGELOG.md

@@ -5,6 +5,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 Links "DE#nnn" prior to version 2.0 point to the Dash Enterprise closed-source Dash AG Grid repo
 
 ## [unreleased]
+### Added
+- [#453](https://github.com/plotly/dash-ag-grid/pull/453) Test for changelog entry
 
 
 ## [35.2.0] - 2026-04-03