Summary

Add a /lgtm (or /merge) comment command that enables auto-merge on a PR. Once all CI checks pass, the PR merges automatically.

Motivation

After approval, maintainers must manually return to click merge when CI finishes. This adds unnecessary latency.

Proposed Behavior

1. Maintainer comments /lgtm on an approved PR
2. Workflow enables GitHub auto-merge via gh pr merge --auto --squash
3. PR merges when all required checks pass; if CI fails, auto-merge is cancelled

Implementation

A GitHub Actions workflow on issue_comment that:

• Verifies the commenter is an org member
• Runs gh pr merge --auto --squash on the PR
• Supports /lgtm cancel to disable auto-merge