Summary

After squash merging via parsec merge, the associated GitHub issue is not auto-closed because the Closes #N from the commit body is lost during squash. Users must manually close issues.

Proposed Behavior

parsec merge should auto-close the associated issue after a successful merge, using the GitHub API:

PATCH /repos/{owner}/{repo}/issues/{number}
{"state": "closed", "state_reason": "completed"}

This should be opt-out via --no-close-issue flag or config option.

Context

Every merged PR in our workflow requires a separate gh issue close command. This adds friction to the workflow.