create_zstream_branch tool fails due kerberos issue, but it guesses the branch exists

[zdohnal]

What happened? What is the problem?

Hi,

I ran /backport skill like this:

/backport package=hplip dist_git-branch=rhel-9.8.0 upstream_patches=~/repo_upstream/hplip/hplip-CVE-2026-8631.patch jira_issue=RHEL-178724

and when it tries to create zstream branch, it reports kerberos error, but at the same time it guesses the branch is created.

What did you expect to happen?

IMO if there is issue with Kerberos, the processing should stop and report it to the user - they can decide what to do next, instead of making a gamble that branch exists, although it does not have any data to prove it.

Example URL(s)

No response

Steps to reproduce

Claude, opus 4.6
1. /backport package=hplip dist_git-branch=rhel-9.8.0 upstream_patches=~/repo_upstream/hplip/hplip-CVE-2026-8631.patch jira_issue=RHEL-178724

Workaround

• There is an existing workaround that can be used until this issue is fixed.

Participation

• I am willing to submit a pull request for this issue. (Packit team is happy to help!)