[devin-ai-integration]

Summary

This PR modifies the ai-gatekeeper workflow to post a comment on the PR when a user needs to add another reviewer. Previously, the workflow would only fail silently with an exit code. Now it will:

1. Post a comment notifying the requester when they try to self-approve their own AI-generated PR
2. Post a comment when the requester's handle couldn't be identified and fewer than 2 approvals exist

The comments use heredoc syntax to handle the multiline body with @ mentions.

Review & Testing Checklist for Human

• Verify the heredoc syntax $(cat <<EOF ... EOF) works correctly in GitHub Actions runtime environment
• Check that the indentation in the heredoc doesn't cause unwanted whitespace in the rendered comment
• Test by creating a Devin-authored PR and having the requester approve it - verify the comment is posted correctly with the @mention

Notes

The YAML syntax has been validated locally, but the actual runtime behavior requires testing with a real PR scenario.

Link to Devin run: https://app.devin.ai/sessions/09d3bd0054e4462b8758cf93846fb36f
Requested by: @morancj

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[morancj]

Amazing, great work bot

[devin-ai-integration]

Thanks! Let me know if you'd like any changes to the PR.