Add follow-up job to commit package version after release.

.github/workflows/release.yml

@@ -43,6 +43,8 @@ jobs:
     name: Stage on npm
     needs: test
     runs-on: ubuntu-latest
+    outputs:
+      version: ${{ steps.meta.outputs.version }}
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -83,3 +85,42 @@ jobs:
 
       - name: Stage package on npm
         run: npm stage publish
+
+  commit-version:
+    name: Commit version bump
+    needs: stage
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: true
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 22
+          cache: npm
+          package-manager-cache: false
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Set package version
+        run: npm version "${{ needs.stage.outputs.version }}" --no-git-tag-version --allow-same-version
+
+      - name: Commit and push version bump
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+          if git diff --quiet -- package.json package-lock.json; then
+            echo "package.json and package-lock.json already match release version; nothing to commit."
+            exit 0
+          fi
+
+          git add package.json package-lock.json
+          git commit -m "chore(release): bump version to ${{ needs.stage.outputs.version }}"
+          git push