Agent must verify PR passes CI and has no merge conflicts before handing off

[oscarvalenzuelab]

Summary

When the agent submits a PR, it must verify the PR is in a mergeable state before considering the task done:

1. All CI checks / tests pass — if any fail, the agent should fix the issues and push again
2. The PR has no merge conflicts with the base branch — if it does, the agent should resolve them

Motivation

• Avoid handing off broken PRs that humans then have to triage
• Catch merge conflicts early while the agent still has context
• Reduce back-and-forth between the agent and reviewers

Acceptance criteria

• After pushing a PR, the agent polls CI status until checks complete
• If CI fails, the agent investigates, fixes, and pushes new commits (up to a reasonable retry limit)
• Agent checks mergeable / mergeStateStatus via gh pr view and resolves conflicts if found
• Task is only marked complete when PR is green AND conflict-free