From 7e51923b5c3b7b4f3550f0255d0e06ab0c3b0111 Mon Sep 17 00:00:00 2001
From: Radhika Gupta <guptaradhika@microsoft.com>
Date: Wed, 5 Aug 2026 14:20:20 -0700
Subject: [PATCH 1/2] Add changelog CI check

---
 .github/workflows/pr-validation.yml | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index ef8f77c6..979f0a8f 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -8,6 +8,32 @@ permissions:
   contents: read
 
 jobs:
+  changelog:
+    name: CHANGELOG updated
+    runs-on: ubuntu-latest
+    if: >-
+      github.event_name == 'pull_request' &&
+      !contains(github.event.pull_request.labels.*.name, 'skip-changelog')
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Verify CHANGELOG.md was updated
+        env:
+          BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+        run: |
+          if git diff --name-only "$BASE_SHA" "$HEAD_SHA" | grep -qx 'CHANGELOG.md'; then
+            echo "CHANGELOG.md was updated."
+          else
+            echo "::error::CHANGELOG.md was not updated in this PR."
+            echo "Add an entry to CHANGELOG.md, or apply the 'skip-changelog' label if this change does not warrant one."
+            exit 1
+          fi
+
   quality:
     name: Black, Pylint, and Mypy
     runs-on: ubuntu-latest

From 95367a20effca844876ad11939bd0bb104aa4b0d Mon Sep 17 00:00:00 2001
From: Radhika Gupta <guptaradhika@microsoft.com>
Date: Wed, 5 Aug 2026 14:40:26 -0700
Subject: [PATCH 2/2] Address feedback

---
 .github/workflows/pr-validation.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index 979f0a8f..c8a84948 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -26,7 +26,7 @@ jobs:
           BASE_SHA: ${{ github.event.pull_request.base.sha }}
           HEAD_SHA: ${{ github.event.pull_request.head.sha }}
         run: |
-          if git diff --name-only "$BASE_SHA" "$HEAD_SHA" | grep -qx 'CHANGELOG.md'; then
+          if git diff --name-only "$BASE_SHA...$HEAD_SHA" | grep -qx 'CHANGELOG.md'; then
             echo "CHANGELOG.md was updated."
           else
             echo "::error::CHANGELOG.md was not updated in this PR."