PR comment to indicate cause of failure

.github/workflows/pull_request_title.yaml

@@ -1,4 +1,4 @@
-name: "Lint PR"
+name: 'Lint PR'
 
 on:
   pull_request_target:
@@ -9,13 +9,40 @@ on:
       - reopened
 
 permissions:
-  pull-requests: read
+  pull-requests: write
 
 jobs:
   main:
     name: Validate PR title
     runs-on: ubuntu-latest
     steps:
       - uses: amannn/action-semantic-pull-request@v5
+        id: lint_pr_title
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          requireScope: false
+
+      - uses: marocchino/sticky-pull-request-comment@v2
+        # When the previous steps fails, the workflow would stop. By adding this
+        # condition you can continue the execution with the populated error message.
+        if: always() && (steps.lint_pr_title.outputs.error_message != null)
+        with:
+          header: pr-title-lint-error
+          message: |
+            Hey there and thank you for opening this pull request! 👋🏼
+
+            We require pull request titles to follow the [Conventional Commits specification](https://gist.github.com/Zekfad/f51cb06ac76e2457f11c80ed705c95a3#file-conventional-commits-md) and it looks like your proposed title needs to be adjusted.
+
+            Details:
+
+            ```
+            ${{ steps.lint_pr_title.outputs.error_message }}
+            ```
+
+      # Delete a previous comment when the issue has been resolved
+      - if: ${{ steps.lint_pr_title.outputs.error_message == null }}
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: pr-title-lint-error
+          delete: true