Add AI reviewer introduction comment to pull requests

Author: barryyosi-panw

.github/github_workflow_scripts/handle_external_pr.py

@@ -47,6 +47,14 @@
     "to the contributions SLAs document."
 )
 
+AI_REVIEWER_INTRODUCTION_MSG = (
+    "## 🤖 AI-Powered Code Review Available\n\n"
+    "Hi @{reviewers}, you can leverage AI-powered code review to assist with this PR!\n\n"
+    "**Available Commands:**\n"
+    "- `@content_bot start review` - Initiate a full AI code review\n"
+    "- `@content_bot re-review` - Incremental review for new commits\n"
+)
+
 XSOAR_SUPPORT_LEVEL_LABEL = "Xsoar Support Level"
 PARTNER_SUPPORT_LEVEL_LABEL = "Partner Support Level"
 COMMUNITY_SUPPORT_LEVEL_LABEL = "Community Support Level"
@@ -488,6 +496,21 @@ def replace_fixes_to_related_in_pr_body(pr: PullRequest) -> str:
     pr.edit(body=edited_body)
     return ""
 
+def post_ai_introduction(pr: PullRequest, reviewers: list[str], t: Terminal) -> None:
+    """
+    Posts the AI reviewer introduction comment.
+
+    Args:
+        pr (PullRequest): The PullRequest object.
+        reviewers (list[str]): List of assigned reviewers.
+        t (Terminal): The terminal object for printing.
+    """
+    reviewer_mentions = ", ".join([f"@{r}" for r in reviewers])
+    ai_introduction_body = AI_REVIEWER_INTRODUCTION_MSG.format(reviewers=reviewer_mentions)
+    pr.create_issue_comment(ai_introduction_body)
+    print(f"{t.cyan}Posted AI reviewer introduction comment{t.normal}")
+
+
 
 def main():
     """Handles External PRs (PRs from forks)
@@ -627,6 +650,9 @@ def main():
     if XSOAR_SUPPORT_LEVEL_LABEL or COMMUNITY_SUPPORT_LEVEL_LABEL in labels_to_add and ver != "1.0.0":
         pr.create_issue_comment(contributors_body)
 
+    post_ai_introduction(pr, reviewers, t)
 
+    
+    
 if __name__ == "__main__":
     main()