GitHub Repository Monitor

Create a cron automation that polls a single GitHub repository on a configurable schedule (default: every minute). Windows PowerShell equivalents for the setup, packaging, upload, and API-check shell snippets are in references/windows.md.

When a comment on an issue or PR contains the trigger phrase (default: @OpenHands), and its author is allowed to trigger work, it:

1. Posts a GitHub comment acknowledging the request with a conversation link.
2. Creates an OpenHands conversation pre-loaded with the issue/PR title, body, labels, and recent comment history for full context.
3. Lets the agent answer the request, and - when asked to change something and WORK_MODE is implement - do the work on a branch, push it, and update an existing pull request instead of opening a second one.
4. Posts a summary GitHub comment when the conversation finishes.