Dogfood: Use mainloop to develop mainloop

[oldsj]

Goal

Use mainloop to develop mainloop going forward.

Test Flow

1. From main thread, ask agent to add a file called dogfood to repo root
2. Follow up on that session to have it create a PR
3. Review and merge the PR
4. Close the session

Requirements

• GitHub auth working in agent containers
• Agent can clone repo, make changes, create PRs
• K8s namespace access for dev environment within agent (future)